Reorganizing model

src/main/java/org/gcube/informationsystem/base/impl/ERImpl.java

@@ -3,8 +3,11 @@
  */
 package org.gcube.informationsystem.base.impl;
 
+import java.io.StringWriter;
+
 import org.gcube.informationsystem.base.reference.ER;
 import org.gcube.informationsystem.base.reference.properties.Header;
+import org.gcube.informationsystem.utils.ISMapper;
 
 import com.fasterxml.jackson.annotation.JsonTypeName;
 
@@ -34,4 +37,20 @@ public abstract class ERImpl extends ISManageableImpl implements ER {
 	public void setHeader(Header header){
 		this.header = header;
 	}
+	
+	@Override
+	public String toString(){
+		StringWriter stringWriter = new StringWriter();
+		try {
+			ISMapper.marshal(this, stringWriter);
+			return stringWriter.toString();
+		}catch(Exception e){
+			try {
+				ISMapper.marshal(this.header, stringWriter);
+				return stringWriter.toString();
+			} catch(Exception e1){
+				return super.toString();
+			}
+		}
+	}
 }

src/main/java/org/gcube/informationsystem/base/impl/ISManageableImpl.java

@@ -3,7 +3,10 @@
  */
 package org.gcube.informationsystem.base.impl;
 
+import java.io.StringWriter;
+
 import org.gcube.informationsystem.base.reference.ISManageable;
+import org.gcube.informationsystem.utils.ISMapper;
 
 /**
  * @author Luca Frosini (ISTI - CNR)
@@ -19,4 +22,15 @@ public class ISManageableImpl implements ISManageable {
 	public ISManageableImpl(){
 		
 	}
+	
+	@Override
+	public String toString(){
+		StringWriter stringWriter = new StringWriter();
+		try {
+			ISMapper.marshal(this, stringWriter);
+			return stringWriter.toString();
+		}catch(Exception e){
+			return super.toString();
+		}
+	}
 }

src/main/java/org/gcube/informationsystem/base/impl/properties/BasePropertyImpl.java

@@ -0,0 +1,24 @@
+package org.gcube.informationsystem.base.impl.properties;
+
+import org.gcube.informationsystem.base.impl.ISManageableImpl;
+import org.gcube.informationsystem.base.reference.properties.BaseProperty;
+import org.gcube.informationsystem.model.reference.properties.Property;
+
+import com.fasterxml.jackson.annotation.JsonTypeName;
+
+/**
+ * @author Luca Frosini (ISTI - CNR)
+ */
+@JsonTypeName(value=BaseProperty.NAME)
+public class BasePropertyImpl extends ISManageableImpl implements Property {
+
+	/**
+	 * Generated Serial Version UID
+	 */
+	private static final long serialVersionUID = 1396998430221747445L;
+
+	public BasePropertyImpl() {
+		super();
+	}
+	
+}

src/main/java/org/gcube/informationsystem/base/impl/properties/HeaderImpl.java

@@ -1,7 +1,7 @@
 /**
  * 
  */
-package org.gcube.informationsystem.model.impl.properties;
+package org.gcube.informationsystem.base.impl.properties;
 
 import java.util.Date;
 import java.util.UUID;
@@ -14,7 +14,7 @@ import com.fasterxml.jackson.annotation.JsonTypeName;
  * @author Luca Frosini (ISTI - CNR)
  */
 @JsonTypeName(value=Header.NAME)
-public class HeaderImpl extends PropertyImpl implements Header {
+public final class HeaderImpl extends BasePropertyImpl implements Header {
 
 	/**
 	 * Generated Serial Version UID

src/main/java/org/gcube/informationsystem/base/impl/relations/BaseRelationImpl.java

@@ -1,14 +1,15 @@
 package org.gcube.informationsystem.base.impl.relations;
 
+import org.gcube.informationsystem.base.impl.ERImpl;
 import org.gcube.informationsystem.base.reference.entities.BaseEntity;
 import org.gcube.informationsystem.base.reference.relations.BaseRelation;
 
-public abstract class BaseRelationImpl<Out extends BaseEntity, In extends BaseEntity> extends RImpl<Out,In> implements BaseRelation<Out, In> {
+public abstract class BaseRelationImpl<Out extends BaseEntity, In extends BaseEntity> extends ERImpl implements BaseRelation<Out, In> {
 	
 	/**
 	 * Generated Serial Version UID 
 	 */
-	private static final long serialVersionUID = 5789078326714392972L;
+	private static final long serialVersionUID = 28704968813390512L;
 	
 	protected Out source;
 	protected In target;
@@ -18,7 +19,29 @@ public abstract class BaseRelationImpl<Out extends BaseEntity, In extends BaseEn
 	}
 
 	protected BaseRelationImpl(Out source, In target) {
-		super(source, target);
+		this();
+		this.source = source;
+		this.target = target;
+	}
+
+	@Override
+	public Out getSource() {
+		return source;
+	}
+	
+	@Override
+	public void setSource(Out source) {
+		this.source = source;
+	}
+
+	@Override
+	public In getTarget() {
+		return target;
+	}
+
+	@Override
+	public void setTarget(In target) {
+		this.target = target;
 	}
 
 }

src/main/java/org/gcube/informationsystem/base/impl/relations/RImpl.java

@@ -1,65 +0,0 @@
-package org.gcube.informationsystem.base.impl.relations;
-
-import java.io.StringWriter;
-
-import org.gcube.informationsystem.base.impl.ERImpl;
-import org.gcube.informationsystem.base.reference.entities.E;
-import org.gcube.informationsystem.base.reference.relations.R;
-import org.gcube.informationsystem.utils.ISMapper;
-
-public abstract class RImpl<Out extends E, In extends E> extends ERImpl implements R<Out, In> {
-	
-	/**
-	 * Generated Serial Version UID 
-	 */
-	private static final long serialVersionUID = 28704968813390512L;
-	
-	protected Out source;
-	protected In target;
-
-	protected RImpl() {
-		super();		
-	}
-
-	protected RImpl(Out source, In target) {
-		this();
-		this.source = source;
-		this.target = target;
-	}
-
-	@Override
-	public Out getSource() {
-		return source;
-	}
-	
-	@Override
-	public void setSource(Out source) {
-		this.source = source;
-	}
-
-	@Override
-	public In getTarget() {
-		return target;
-	}
-
-	@Override
-	public void setTarget(In target) {
-		this.target = target;
-	}
-
-	@Override
-	public String toString() {
-		StringWriter stringWriter = new StringWriter();
-		try {
-			ISMapper.marshal(this, stringWriter);
-			return stringWriter.toString();
-		} catch (Exception e) {
-			try {
-				ISMapper.marshal(this.header, stringWriter);
-				return stringWriter.toString();
-			} catch (Exception e1) {
-				return super.toString();
-			}
-		}
-	}
-}

src/main/java/org/gcube/informationsystem/base/reference/AccessType.java

@@ -5,7 +5,6 @@ package org.gcube.informationsystem.base.reference;
 
 import java.util.Arrays;
 
-import org.gcube.informationsystem.base.reference.properties.Property;
 import org.gcube.informationsystem.context.impl.entities.ContextImpl;
 import org.gcube.informationsystem.context.impl.relations.IsParentOfImpl;
 import org.gcube.informationsystem.context.reference.entities.Context;
@@ -25,6 +24,7 @@ import org.gcube.informationsystem.model.impl.relations.RelationImpl;
 import org.gcube.informationsystem.model.reference.entities.Entity;
 import org.gcube.informationsystem.model.reference.entities.Facet;
 import org.gcube.informationsystem.model.reference.entities.Resource;
+import org.gcube.informationsystem.model.reference.properties.Property;
 import org.gcube.informationsystem.model.reference.relations.ConsistsOf;
 import org.gcube.informationsystem.model.reference.relations.IsRelatedTo;
 import org.gcube.informationsystem.model.reference.relations.Relation;

src/main/java/org/gcube/informationsystem/base/reference/entities/BaseEntity.java

@@ -1,5 +1,6 @@
 package org.gcube.informationsystem.base.reference.entities;
 
+import org.gcube.informationsystem.base.reference.ER;
 import org.gcube.informationsystem.types.annotations.Abstract;
 
 import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
@@ -7,7 +8,7 @@ import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 @Abstract
 @JsonIgnoreProperties(ignoreUnknown=true)
 //@JsonDeserialize(as=BaseEntityImpl.class) Do not uncomment to manage subclasses
-public interface BaseEntity extends E {
+public interface BaseEntity extends ER {
 	
 	public static final String NAME = "BaseEntity"; //Entity.class.getSimpleName();
 	

src/main/java/org/gcube/informationsystem/base/reference/entities/E.java

@@ -1,15 +0,0 @@
-package org.gcube.informationsystem.base.reference.entities;
-
-import org.gcube.informationsystem.base.reference.ER;
-import org.gcube.informationsystem.types.annotations.Abstract;
-
-import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
-
-@Abstract
-@JsonIgnoreProperties(ignoreUnknown=true)
-//@JsonDeserialize(as=EImpl.class) Do not uncomment to manage subclasses
-public interface E extends ER {
-	
-	public static final String NAME = "E"; // Entity.class.getSimpleName();
-	
-}

src/main/java/org/gcube/informationsystem/base/reference/properties/BaseProperty.java

@@ -0,0 +1,20 @@
+package org.gcube.informationsystem.base.reference.properties;
+
+import org.gcube.informationsystem.base.reference.ISManageable;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+
+/**
+ * @author Luca Frosini (ISTI - CNR)
+ * Root Class for Property types. It creates a base common type, which is useful
+ * for management purpose.
+ */
+// @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = ISManageable.CLASS_PROPERTY)
+@JsonIgnoreProperties(ignoreUnknown=true)
+public interface BaseProperty extends ISManageable {
+	
+	public static final String NAME = "BaseProperty"; //BaseProperty.class.getSimpleName();
+	public static final String DESCRIPTION = "This is the very base class for Property";
+	public static final String VERSION = "1.0.0";
+	
+}

src/main/java/org/gcube/informationsystem/base/reference/properties/Header.java

@@ -6,8 +6,8 @@ package org.gcube.informationsystem.base.reference.properties;
 import java.util.Date;
 import java.util.UUID;
 
+import org.gcube.informationsystem.base.impl.properties.HeaderImpl;
 import org.gcube.informationsystem.base.reference.ISConstants;
-import org.gcube.informationsystem.model.impl.properties.HeaderImpl;
 import org.gcube.informationsystem.types.annotations.ISProperty;
 
 import com.fasterxml.jackson.annotation.JsonFormat;
@@ -18,7 +18,7 @@ import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
  * https://wiki.gcube-system.org/gcube/Facet_Based_Resource_Model#Header
  */
 @JsonDeserialize(as=HeaderImpl.class)
-public interface Header extends Property {
+public interface Header extends BaseProperty {
 
 	public static final String NAME = "Header"; // Header.class.getSimpleName();
 

src/main/java/org/gcube/informationsystem/base/reference/relations/BaseRelation.java

@@ -1,12 +1,38 @@
 package org.gcube.informationsystem.base.reference.relations;
 
+import org.gcube.informationsystem.base.reference.ER;
 import org.gcube.informationsystem.base.reference.entities.BaseEntity;
+import org.gcube.informationsystem.base.reference.properties.Header;
 import org.gcube.informationsystem.types.annotations.Abstract;
+import org.gcube.informationsystem.types.annotations.ISProperty;
+
+import com.fasterxml.jackson.annotation.JsonGetter;
+import com.fasterxml.jackson.annotation.JsonIgnore;
 
 @Abstract
 //@JsonDeserialize(as=BaseRelationImpl.class) Do not uncomment to manage subclasses
-public interface BaseRelation<Out extends BaseEntity, In extends BaseEntity> extends R<Out,In> {
+public interface BaseRelation<Out extends BaseEntity, In extends BaseEntity> extends ER {
 	
 	public static final String NAME = "BaseRelation"; // BaseRelation.class.getSimpleName();
 	
+	public static final String SOURCE_PROPERTY = "source";
+	public static final String TARGET_PROPERTY = "target";
+	
+	/* Overriding getHeader method to create Header property in type */
+	@ISProperty(name = HEADER_PROPERTY, mandatory = true, nullable = false)
+	@Override
+	public Header getHeader();
+	
+	@JsonGetter(value=SOURCE_PROPERTY)
+	public Out getSource();
+	
+	@JsonIgnore
+	public void setSource(Out source);
+	
+	@JsonGetter(value=TARGET_PROPERTY)
+	public In getTarget();
+	
+	@JsonIgnore
+	public void setTarget(In target);
+	
 }

src/main/java/org/gcube/informationsystem/base/reference/relations/R.java

@@ -1,38 +0,0 @@
-package org.gcube.informationsystem.base.reference.relations;
-
-import org.gcube.informationsystem.base.reference.ER;
-import org.gcube.informationsystem.base.reference.entities.E;
-import org.gcube.informationsystem.base.reference.properties.Header;
-import org.gcube.informationsystem.types.annotations.Abstract;
-import org.gcube.informationsystem.types.annotations.ISProperty;
-
-import com.fasterxml.jackson.annotation.JsonGetter;
-import com.fasterxml.jackson.annotation.JsonIgnore;
-
-@Abstract
-//@JsonDeserialize(as=RImpl.class) Do not uncomment to manage subclasses
-public interface R<Out extends E, In extends E> extends ER {
-	
-	public static final String NAME = "R"; // R.class.getSimpleName();
-	
-	public static final String SOURCE_PROPERTY = "source";
-	public static final String TARGET_PROPERTY = "target";
-	
-	/* Overriding getHeader method to create Header property in type */
-	@ISProperty(name = HEADER_PROPERTY, mandatory = true, nullable = false)
-	@Override
-	public Header getHeader();
-	
-	@JsonGetter(value=SOURCE_PROPERTY)
-	public Out getSource();
-	
-	@JsonIgnore
-	public void setSource(Out source);
-	
-	@JsonGetter(value=TARGET_PROPERTY)
-	public In getTarget();
-	
-	@JsonIgnore
-	public void setTarget(In target);
-	
-}

src/main/java/org/gcube/informationsystem/context/impl/entities/ContextImpl.java

@@ -8,10 +8,10 @@ import java.util.List;
 import java.util.UUID;
 
 import org.gcube.informationsystem.base.impl.entities.BaseEntityImpl;
+import org.gcube.informationsystem.base.impl.properties.HeaderImpl;
 import org.gcube.informationsystem.context.impl.relations.IsParentOfImpl;
 import org.gcube.informationsystem.context.reference.entities.Context;
 import org.gcube.informationsystem.context.reference.relations.IsParentOf;
-import org.gcube.informationsystem.model.impl.properties.HeaderImpl;
 
 import com.fasterxml.jackson.annotation.JsonSetter;
 import com.fasterxml.jackson.annotation.JsonTypeName;

src/main/java/org/gcube/informationsystem/model/impl/entities/DummyFacet.java

@@ -5,7 +5,7 @@ package org.gcube.informationsystem.model.impl.entities;
 
 import java.util.UUID;
 
-import org.gcube.informationsystem.model.impl.properties.HeaderImpl;
+import org.gcube.informationsystem.base.impl.properties.HeaderImpl;
 import org.gcube.informationsystem.model.reference.entities.Facet;
 
 /**

src/main/java/org/gcube/informationsystem/model/impl/entities/DummyResource.java

@@ -5,7 +5,7 @@ package org.gcube.informationsystem.model.impl.entities;
 
 import java.util.UUID;
 
-import org.gcube.informationsystem.model.impl.properties.HeaderImpl;
+import org.gcube.informationsystem.base.impl.properties.HeaderImpl;
 import org.gcube.informationsystem.model.reference.entities.Resource;
 
 /**

src/main/java/org/gcube/informationsystem/model/impl/entities/EntityImpl.java

@@ -3,11 +3,8 @@
  */
 package org.gcube.informationsystem.model.impl.entities;
 
-import java.io.StringWriter;
-
 import org.gcube.informationsystem.base.impl.entities.BaseEntityImpl;
 import org.gcube.informationsystem.model.reference.entities.Entity;
-import org.gcube.informationsystem.utils.ISMapper;
 
 import com.fasterxml.jackson.annotation.JsonTypeName;
 
@@ -27,20 +24,4 @@ public abstract class EntityImpl extends BaseEntityImpl implements Entity {
 		this.header = null;
 	}
 	
-	@Override
-	public String toString(){
-		StringWriter stringWriter = new StringWriter();
-		try {
-			ISMapper.marshal(this, stringWriter);
-			return stringWriter.toString();
-		}catch(Exception e){
-			try {
-				ISMapper.marshal(this.header, stringWriter);
-				return stringWriter.toString();
-			} catch(Exception e1){
-				return super.toString();
-			}
-		}
-	}
-
 }

src/main/java/org/gcube/informationsystem/model/impl/entities/FacetImpl.java

@@ -9,8 +9,8 @@ import java.util.Map;
 import java.util.Set;
 
 import org.gcube.informationsystem.base.reference.ISManageable;
-import org.gcube.informationsystem.base.reference.properties.Property;
 import org.gcube.informationsystem.model.reference.entities.Facet;
+import org.gcube.informationsystem.model.reference.properties.Property;
 import org.gcube.informationsystem.utils.ISMapper;
 
 import com.fasterxml.jackson.annotation.JsonIgnore;

src/main/java/org/gcube/informationsystem/model/impl/properties/DummyProperty.java

@@ -3,7 +3,7 @@
  */
 package org.gcube.informationsystem.model.impl.properties;
 
-import org.gcube.informationsystem.base.reference.properties.Property;
+import org.gcube.informationsystem.model.reference.properties.Property;
 
 /**
  * @author Luca Frosini (ISTI - CNR)

src/main/java/org/gcube/informationsystem/model/impl/properties/PropertyImpl.java

@@ -4,7 +4,7 @@
 package org.gcube.informationsystem.model.impl.properties;
 
 import org.gcube.informationsystem.base.impl.ISManageableImpl;
-import org.gcube.informationsystem.base.reference.properties.Property;
+import org.gcube.informationsystem.model.reference.properties.Property;
 
 import com.fasterxml.jackson.annotation.JsonTypeName;
 

src/main/java/org/gcube/informationsystem/model/impl/relations/RelationImpl.java

@@ -10,9 +10,9 @@ import java.util.Set;
 
 import org.gcube.informationsystem.base.impl.relations.BaseRelationImpl;
 import org.gcube.informationsystem.base.reference.ISManageable;
-import org.gcube.informationsystem.base.reference.properties.Property;
 import org.gcube.informationsystem.model.reference.entities.Entity;
 import org.gcube.informationsystem.model.reference.properties.PropagationConstraint;
+import org.gcube.informationsystem.model.reference.properties.Property;
 import org.gcube.informationsystem.model.reference.relations.Relation;
 import org.gcube.informationsystem.utils.ISMapper;
 

src/main/java/org/gcube/informationsystem/model/reference/properties/Encrypted.java

@@ -1,6 +1,5 @@
 package org.gcube.informationsystem.model.reference.properties;
 
-import org.gcube.informationsystem.base.reference.properties.Property;
 import org.gcube.informationsystem.model.impl.properties.EncryptedImpl;
 import org.gcube.informationsystem.types.annotations.ISProperty;
 

src/main/java/org/gcube/informationsystem/model/reference/properties/PropagationConstraint.java

@@ -3,7 +3,6 @@
  */
 package org.gcube.informationsystem.model.reference.properties;
 
-import org.gcube.informationsystem.base.reference.properties.Property;
 import org.gcube.informationsystem.model.impl.properties.PropagationConstraintImpl;
 import org.gcube.informationsystem.types.annotations.ISProperty;
 

src/main/java/org/gcube/informationsystem/model/reference/properties/Property.java

@@ -1,9 +1,9 @@
 /**
  * 
  */
-package org.gcube.informationsystem.base.reference.properties;
+package org.gcube.informationsystem.model.reference.properties;
 
-import org.gcube.informationsystem.base.reference.ISManageable;
+import org.gcube.informationsystem.base.reference.properties.BaseProperty;
 
 import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 
@@ -12,10 +12,9 @@ import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
  * Root Class for Property types. It creates a base common type, which is useful
  * for management purpose.
  */
-
 // @JsonTypeInfo(use = JsonTypeInfo.Id.NAME, include = JsonTypeInfo.As.PROPERTY, property = ISManageable.CLASS_PROPERTY)
 @JsonIgnoreProperties(ignoreUnknown=true)
-public interface Property extends ISManageable {
+public interface Property extends BaseProperty {
 	
 	public static final String NAME = "Property"; //Property.class.getSimpleName();
 	public static final String DESCRIPTION = "This is the base class for Property";

src/main/java/org/gcube/informationsystem/types/Type.java

@@ -30,8 +30,7 @@ import java.util.Map;
 import java.util.Set;
 import java.util.UUID;
 
-import org.gcube.informationsystem.base.reference.properties.Property;
+import org.gcube.informationsystem.model.reference.properties.Property;
-
 
 /**
  * @author Lucio Lelii (ISTI - CNR)
@@ -140,7 +139,6 @@ public class Type {
 		TYPES_BY_CLASS.put(byte[].class, OType.BYNARY);
 		TYPES_BY_CLASS.put(Byte[].class, OType.BYNARY);
 		
-		
 		TYPES_BY_CLASS.put(Enum.class, OType.STRING);
 		TYPES_BY_CLASS.put(URI.class, OType.STRING);
 		TYPES_BY_CLASS.put(URL.class, OType.STRING);
@@ -169,6 +167,4 @@ public class Type {
 		return type;
 	}
 	
-	  
 }
-

src/main/java/org/gcube/informationsystem/types/TypeBinder.java

@@ -5,7 +5,6 @@ import java.util.ArrayList;
 import java.util.List;
 
 import org.gcube.informationsystem.base.reference.ISManageable;
-import org.gcube.informationsystem.types.impl.entities.TypeDefinitionImpl;
 import org.gcube.informationsystem.types.reference.TypeDefinition;
 
 import com.fasterxml.jackson.databind.JavaType;
@@ -18,36 +17,38 @@ public class TypeBinder {
 
 	private final static String NAME = "NAME";
 	
-	public static String serializeTypeDefinition(TypeDefinition typeDefinition) throws Exception{
+	public static <ISM extends ISManageable> String serializeTypeDefinition(TypeDefinition<ISM> typeDefinition) throws Exception{
 		ObjectMapper mapper = new ObjectMapper();
 		String json = mapper.writeValueAsString(typeDefinition);
 		return json;
 	}
 	
-	public static String serializeType(Class<? extends ISManageable> type) throws Exception{
+	public static <ISM extends ISManageable> String serializeType(Class<ISM> type) throws Exception{
-		TypeDefinition typeDefinition = createTypeDefinition(type);
+		TypeDefinition<ISM> typeDefinition = createTypeDefinition(type);
 		return serializeTypeDefinition(typeDefinition);
 	}
 
-	public static TypeDefinition deserializeTypeDefinition(String json) throws Exception{
+	public static <ISM extends ISManageable> TypeDefinition<ISM> deserializeTypeDefinition(String json) throws Exception{
 		ObjectMapper mapper = new ObjectMapper();
-		return mapper.readValue(json, TypeDefinition.class);
+		@SuppressWarnings("unchecked")
+		TypeDefinition<ISM> readValue = mapper.readValue(json, TypeDefinition.class);
+		return readValue;
 	}
 	
-	public static String serializeTypeDefinitions(List<TypeDefinition> typeDefinitions) throws Exception{
+	public static <ISM extends ISManageable> String serializeTypeDefinitions(List<TypeDefinition<ISM>> typeDefinitions) throws Exception{
 		ObjectMapper mapper = new ObjectMapper();
 		String json = mapper.writeValueAsString(typeDefinitions);
 		return json;
 	}
 	
-	public static List<TypeDefinition> deserializeTypeDefinitions(String json) throws Exception{
+	public static <ISM extends ISManageable> List<TypeDefinition<ISM>> deserializeTypeDefinitions(String json) throws Exception{
 		ObjectMapper mapper = new ObjectMapper();
 		JavaType type = mapper.getTypeFactory().constructCollectionType(ArrayList.class, TypeDefinition.class) ;
 		return mapper.readValue(json, type);
 	}
 	
-	public static TypeDefinition createTypeDefinition(Class<? extends ISManageable> clz) {
+	public static <ISM extends ISManageable> TypeDefinition<ISM> createTypeDefinition(Class<ISM> clz) {
-		TypeDefinition typeDefinition = new TypeDefinitionImpl(clz);
+		TypeDefinition<ISM> typeDefinition = TypeDefinitionImpl.getInstance(clz);
 		return typeDefinition;
 	}
 	

src/main/java/org/gcube/informationsystem/types/TypeDefinitionImpl.java

@@ -1,22 +1,22 @@
-package org.gcube.informationsystem.types.impl.entities;
+package org.gcube.informationsystem.types;
 
 import java.lang.reflect.Method;
 import java.lang.reflect.TypeVariable;
 import java.util.HashSet;
 import java.util.Set;
 
+import org.gcube.informationsystem.base.impl.ERImpl;
 import org.gcube.informationsystem.base.reference.ISManageable;
-import org.gcube.informationsystem.base.reference.properties.Property;
+import org.gcube.informationsystem.base.reference.entities.BaseEntity;
-import org.gcube.informationsystem.model.reference.entities.Entity;
+import org.gcube.informationsystem.base.reference.properties.BaseProperty;
-import org.gcube.informationsystem.model.reference.entities.Facet;
+import org.gcube.informationsystem.base.reference.relations.BaseRelation;
 import org.gcube.informationsystem.model.reference.entities.Resource;
-import org.gcube.informationsystem.model.reference.relations.ConsistsOf;
-import org.gcube.informationsystem.model.reference.relations.IsRelatedTo;
-import org.gcube.informationsystem.model.reference.relations.Relation;
-import org.gcube.informationsystem.types.TypeBinder;
 import org.gcube.informationsystem.types.annotations.Abstract;
 import org.gcube.informationsystem.types.annotations.ISProperty;
+import org.gcube.informationsystem.types.impl.entities.EntityTypeDefinitionImpl;
 import org.gcube.informationsystem.types.impl.properties.PropertyDefinitionImpl;
+import org.gcube.informationsystem.types.impl.properties.PropertyTypeDefinitionImpl;
+import org.gcube.informationsystem.types.impl.relations.RelationTypeDefinitionImpl;
 import org.gcube.informationsystem.types.reference.TypeDefinition;
 import org.gcube.informationsystem.types.reference.properties.PropertyDefinition;
 import org.slf4j.Logger;
@@ -24,18 +24,19 @@ import org.slf4j.LoggerFactory;
 
 import com.fasterxml.jackson.annotation.JsonAutoDetect;
 import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
-import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 
 @JsonAutoDetect(fieldVisibility=JsonAutoDetect.Visibility.ANY)
 @JsonIgnoreProperties(ignoreUnknown=true)
-public class TypeDefinitionImpl implements TypeDefinition {
+public abstract class TypeDefinitionImpl<ISM extends ISManageable> extends ERImpl implements TypeDefinition<ISM> {
+
+	/**
+	 * Generated Serial Version UID
+	 */
+	private static final long serialVersionUID = 2698204820689338513L;
 
 	private static Logger logger = LoggerFactory.getLogger(TypeDefinitionImpl.class);
 	
-	private static final String EDGE_CLASS_NAME   = "E";
-	private static final String VERTEX_CLASS_NAME = "V";
-	
 	private final static String DESCRIPTION = "DESCRIPTION";
 	
 	protected String name;
@@ -45,12 +46,7 @@ public class TypeDefinitionImpl implements TypeDefinition {
 	protected Set<String> superClasses;
 	protected Set<PropertyDefinition> properties;
 	
-	@JsonInclude(JsonInclude.Include.NON_NULL) 
+	protected static <ISM extends ISManageable> Set<String> retrieveSuperClasses(Class<? extends ISM> type, Class<ISM> baseClass, String topSuperClass){
-	protected String sourceType;
-	@JsonInclude(JsonInclude.Include.NON_NULL) 
-	protected String targetType;
-	
-	private static Set<String> retrieveSuperClasses(Class<? extends ISManageable> type, Class<? extends ISManageable> baseClass, String topSuperClass){
 		Set<String> interfaceList = new HashSet<>();
 		
 		if(type==baseClass){
@@ -92,14 +88,27 @@ public class TypeDefinitionImpl implements TypeDefinition {
 		return properties;
 	}
 	
-	private static Class<?> getGenericClass(java.lang.reflect.Type type){
+	protected static Class<?> getGenericClass(java.lang.reflect.Type type){
 		TypeVariable<?> typeVariable = (TypeVariable<?>) type;
 		java.lang.reflect.Type[] bounds = typeVariable.getBounds();
 		java.lang.reflect.Type t = bounds[0];
 		return (Class<?>) t; 
 	}
 	
-	public TypeDefinitionImpl(Class<? extends ISManageable> clz) {
+	@SuppressWarnings({"rawtypes", "unchecked"})
+	public static <ISM extends ISManageable> TypeDefinition<ISM> getInstance(Class<ISM> clz) {
+		if(BaseEntity.class.isAssignableFrom(clz)) {
+			return new EntityTypeDefinitionImpl(clz);
+		} else if(BaseRelation.class.isAssignableFrom(clz)){
+			return new RelationTypeDefinitionImpl(clz);
+		} else if(BaseProperty.class.isAssignableFrom(clz)){
+			return new PropertyTypeDefinitionImpl(clz);
+		} else {
+			throw new RuntimeException("Serialization required");
+		}
+	}
+	
+	protected TypeDefinitionImpl(Class<ISM> clz) {
 		this.name = TypeBinder.getType(clz);
 		this.description = TypeBinder.getStaticStringFieldByName(clz, DESCRIPTION, "");
 		this.abstractType = false;
@@ -108,40 +117,6 @@ public class TypeDefinitionImpl implements TypeDefinition {
 			this.abstractType = true;
 		}
 		
-		if(Entity.class.isAssignableFrom(clz)) {
-			if(Resource.class.isAssignableFrom(clz)){
-				this.superClasses = retrieveSuperClasses(clz, Resource.class, Entity.NAME);
-			}else{
-				if(Facet.class.isAssignableFrom(clz)){
-					this.superClasses = retrieveSuperClasses(clz, Facet.class, Entity.NAME);
-				} else {
-					this.superClasses = retrieveSuperClasses(clz, Entity.class, VERTEX_CLASS_NAME);
-				}
-			}
-		} else if(Relation.class.isAssignableFrom(clz)){
-			if(IsRelatedTo.class.isAssignableFrom(clz)){
-				this.superClasses = retrieveSuperClasses(clz, IsRelatedTo.class, Relation.NAME);
-			} else if(ConsistsOf.class.isAssignableFrom(clz)) {
-				this.superClasses = retrieveSuperClasses(clz, ConsistsOf.class, Relation.NAME);
-			} else {
-				this.superClasses = retrieveSuperClasses(clz, Relation.class, EDGE_CLASS_NAME);
-			}
-			
-			java.lang.reflect.Type[] typeParameters = clz.getTypeParameters();
-			@SuppressWarnings("unchecked")
-			Class<? extends ISManageable> sourceClass = (Class<? extends ISManageable>) getGenericClass(typeParameters[0]);
-			@SuppressWarnings("unchecked")
-			Class<? extends ISManageable> targetClass = (Class<? extends ISManageable>) getGenericClass(typeParameters[1]);
-			
-			this.sourceType = TypeBinder.getType(sourceClass);
-			this.targetType = TypeBinder.getType(targetClass);
-			
-		} else if(Property.class.isAssignableFrom(clz)){
-			this.superClasses = retrieveSuperClasses(clz, Property.class, clz == Property.class ? null : Property.NAME);
-		} else {
-			throw new RuntimeException("Serialization required");
-		}
-		
 		if(!Resource.class.isAssignableFrom(clz)){
 			this.properties = retrieveListOfProperties(clz);
 		}
@@ -150,43 +125,28 @@ public class TypeDefinitionImpl implements TypeDefinition {
 	}
 	
 	@Override
-	public String toString() {
-		return "TypeDefinition ["
-				+ "name=" + name
-				+ (sourceType==null ? "" : "(" + sourceType + "->" + targetType + ")")
-				+ ", description=" + description
-				+ ", abstract=" + abstractType
-				+ ", superClasses=" + superClasses 
-				+ ", properties=" + properties
-				+ "]";
-	}
-
 	public String getName() {
 		return name;
 	}
 
+	@Override
 	public String getDescription() {
 		return description;
 	}
 
+	@Override
 	public boolean isAbstract() {
 		return abstractType;
 	}
 
+	@Override
 	public Set<String> getSuperClasses() {
 		return superClasses;
 	}
 
+	@Override
 	public Set<PropertyDefinition> getProperties() {
 		return properties;
 	}
 	
-	public String getSourceType() {
-		return sourceType;
-	}
-	
-	public String getTargetType() {
-		return targetType;
-	}
-	
 }

src/main/java/org/gcube/informationsystem/types/impl/entities/EntityTypeDefinitionImpl.java

@@ -0,0 +1,37 @@
+package org.gcube.informationsystem.types.impl.entities;
+
+import org.gcube.informationsystem.base.reference.entities.BaseEntity;
+import org.gcube.informationsystem.model.reference.entities.Entity;
+import org.gcube.informationsystem.model.reference.entities.Facet;
+import org.gcube.informationsystem.model.reference.entities.Resource;
+import org.gcube.informationsystem.types.TypeDefinitionImpl;
+import org.gcube.informationsystem.types.reference.entities.EntityDefinition;
+
+public class EntityTypeDefinitionImpl<E extends BaseEntity> extends TypeDefinitionImpl<E> implements EntityDefinition<E> {
+
+	/**
+	 * 
+	 */
+	private static final long serialVersionUID = 2614315845213942880L;
+
+	private static final String VERTEX_CLASS_NAME = "V";
+	
+	public EntityTypeDefinitionImpl(Class<E> clz) {
+		super(clz);
+		
+		if(Resource.class.isAssignableFrom(clz)){
+			@SuppressWarnings({"unchecked"})
+			Class<? extends Resource> c = (Class<? extends Resource>) clz;
+			this.superClasses = retrieveSuperClasses(c, Resource.class, Entity.NAME);
+		} else if(Facet.class.isAssignableFrom(clz)){
+			@SuppressWarnings({"unchecked"})
+			Class<? extends Facet> c = (Class<? extends Facet>) clz;
+			this.superClasses = retrieveSuperClasses(c, Facet.class, Entity.NAME);
+		} else {
+			this.superClasses = retrieveSuperClasses(clz, BaseEntity.class, VERTEX_CLASS_NAME);
+		}
+		
+		
+	}
+
+}

src/main/java/org/gcube/informationsystem/types/impl/properties/PropertyDefinitionImpl.java

@@ -7,12 +7,12 @@ import java.net.URL;
 import java.util.UUID;
 
 import org.gcube.informationsystem.base.reference.ISManageable;
-import org.gcube.informationsystem.base.reference.properties.Property;
+import org.gcube.informationsystem.model.reference.properties.Property;
 import org.gcube.informationsystem.types.Type;
 import org.gcube.informationsystem.types.Type.OType;
 import org.gcube.informationsystem.types.TypeBinder;
+import org.gcube.informationsystem.types.TypeDefinitionImpl;
 import org.gcube.informationsystem.types.annotations.ISProperty;
-import org.gcube.informationsystem.types.impl.entities.TypeDefinitionImpl;
 import org.gcube.informationsystem.types.reference.properties.PropertyDefinition;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -23,7 +23,12 @@ import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 
 @JsonAutoDetect(fieldVisibility=JsonAutoDetect.Visibility.ANY)
 @JsonIgnoreProperties(ignoreUnknown=true)
-public class PropertyDefinitionImpl implements PropertyDefinition {
+public final class PropertyDefinitionImpl implements PropertyDefinition {
+
+	/**
+	 * Generated Serial Version UID
+	 */
+	private static final long serialVersionUID = -5925314595659292025L;
 
 	private static Logger logger = LoggerFactory.getLogger(TypeDefinitionImpl.class);
 	
@@ -60,6 +65,8 @@ public class PropertyDefinitionImpl implements PropertyDefinition {
 		return name;
 	}
 	
+	
+	
 	public PropertyDefinitionImpl(ISProperty propertyAnnotation, Method method) {
 		String name = propertyAnnotation.name().isEmpty()?getPropertyNameFromMethodName(method):propertyAnnotation.name();
 		this.name = name;

src/main/java/org/gcube/informationsystem/types/impl/properties/PropertyTypeDefinitionImpl.java

@@ -0,0 +1,19 @@
+package org.gcube.informationsystem.types.impl.properties;
+
+import org.gcube.informationsystem.base.reference.properties.BaseProperty;
+import org.gcube.informationsystem.types.TypeDefinitionImpl;
+import org.gcube.informationsystem.types.reference.properties.PropertyTypeDefiniton;
+
+public class PropertyTypeDefinitionImpl<P extends BaseProperty> extends TypeDefinitionImpl<P> implements PropertyTypeDefiniton<P> {
+	
+	/**
+	 * 
+	 */
+	private static final long serialVersionUID = 7532701373450638829L;
+
+	public PropertyTypeDefinitionImpl(Class<P> clz) {
+		super(clz);
+		this.superClasses = retrieveSuperClasses(clz, BaseProperty.class, clz == BaseProperty.class ? null : BaseProperty.NAME);
+	}
+
+}

src/main/java/org/gcube/informationsystem/types/impl/relations/RelationTypeDefinitionImpl.java

@@ -0,0 +1,88 @@
+package org.gcube.informationsystem.types.impl.relations;
+
+import org.gcube.informationsystem.base.reference.entities.BaseEntity;
+import org.gcube.informationsystem.base.reference.relations.BaseRelation;
+import org.gcube.informationsystem.model.reference.relations.ConsistsOf;
+import org.gcube.informationsystem.model.reference.relations.IsRelatedTo;
+import org.gcube.informationsystem.model.reference.relations.Relation;
+import org.gcube.informationsystem.types.TypeBinder;
+import org.gcube.informationsystem.types.TypeDefinitionImpl;
+import org.gcube.informationsystem.types.reference.entities.EntityDefinition;
+import org.gcube.informationsystem.types.reference.relations.RelationDefinition;
+
+import com.fasterxml.jackson.annotation.JsonInclude;
+
+public class RelationTypeDefinitionImpl<Out extends BaseEntity, In extends BaseEntity, Rel extends BaseRelation<Out,In>>
+		extends TypeDefinitionImpl<Rel> implements RelationDefinition<Out,In,Rel> {
+
+	/**
+	 * 
+	 */
+	private static final long serialVersionUID = 2221831081869571296L;
+	
+	private static final String EDGE_CLASS_NAME   = "E";
+	
+	@JsonInclude(JsonInclude.Include.NON_NULL) 
+	protected String sourceType;
+	@JsonInclude(JsonInclude.Include.NON_NULL) 
+	protected String targetType;
+	
+	public RelationTypeDefinitionImpl(Class<Rel> clz) {
+		super(clz);
+		
+		if(IsRelatedTo.class.isAssignableFrom(clz)){
+			@SuppressWarnings({"unchecked", "rawtypes"})
+			Class<? extends IsRelatedTo> c = (Class<? extends IsRelatedTo>) clz;
+			this.superClasses = retrieveSuperClasses(c, IsRelatedTo.class, Relation.NAME);
+		} else if(ConsistsOf.class.isAssignableFrom(clz)) {
+			@SuppressWarnings({"unchecked", "rawtypes"})
+			Class<? extends ConsistsOf> c = (Class<? extends ConsistsOf>) clz;
+			this.superClasses = retrieveSuperClasses(c, ConsistsOf.class, Relation.NAME);
+		} else {
+			this.superClasses = retrieveSuperClasses(clz, BaseRelation.class, EDGE_CLASS_NAME);
+		}
+		
+		java.lang.reflect.Type[] typeParameters = clz.getTypeParameters();
+		@SuppressWarnings("unchecked")
+		Class<Out> sourceClass = (Class<Out>) getGenericClass(typeParameters[0]);
+		@SuppressWarnings("unchecked")
+		Class<In> targetClass = (Class<In>) getGenericClass(typeParameters[1]);
+		
+		this.sourceType = TypeBinder.getType(sourceClass);
+		this.targetType = TypeBinder.getType(targetClass);
+	}
+
+	
+	public String getSourceType() {
+		return sourceType;
+	}
+	
+	public String getTargetType() {
+		return targetType;
+	}
+	
+	@Override
+	public EntityDefinition<Out> getSource() {
+		// TODO Auto-generated method stub
+		return null;
+	}
+
+	@Override
+	public void setSource(EntityDefinition<Out> source) {
+		// TODO Auto-generated method stub
+		
+	}
+
+	@Override
+	public EntityDefinition<In> getTarget() {
+		// TODO Auto-generated method stub
+		return null;
+	}
+
+	@Override
+	public void setTarget(EntityDefinition<In> target) {
+		// TODO Auto-generated method stub
+		
+	}
+	
+}

src/main/java/org/gcube/informationsystem/types/reference/TypeDefinition.java

@@ -2,9 +2,11 @@ package org.gcube.informationsystem.types.reference;
 
 import java.util.Set;
 
+import org.gcube.informationsystem.base.reference.ER;
+import org.gcube.informationsystem.base.reference.ISManageable;
 import org.gcube.informationsystem.types.reference.properties.PropertyDefinition;
 
-public interface TypeDefinition {
+public interface TypeDefinition<ISM extends ISManageable> extends ER {
 	
 	public String getName();
 
@@ -16,8 +18,4 @@ public interface TypeDefinition {
 
 	public Set<PropertyDefinition> getProperties();
 	
-	public String getSourceType();
-	
-	public String getTargetType();
-	
 }

src/main/java/org/gcube/informationsystem/types/reference/entities/EntityDefinition.java

@@ -0,0 +1,8 @@
+package org.gcube.informationsystem.types.reference.entities;
+
+import org.gcube.informationsystem.base.reference.entities.BaseEntity;
+import org.gcube.informationsystem.types.reference.TypeDefinition;
+
+public interface EntityDefinition<E extends BaseEntity> extends TypeDefinition<E>, BaseEntity {
+	
+}

src/main/java/org/gcube/informationsystem/types/reference/properties/PropertyDefinition.java

@@ -1,5 +1,17 @@
 package org.gcube.informationsystem.types.reference.properties;
 
-public interface PropertyDefinition {
+import org.gcube.informationsystem.base.reference.properties.BaseProperty;
+import org.gcube.informationsystem.types.impl.properties.PropertyDefinitionImpl;
+
+import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
+
+/**
+ * @author Luca Frosini (ISTI - CNR)
+ * https://wiki.gcube-system.org/gcube/Facet_Based_Resource_Model#Header
+ */
+@JsonDeserialize(as = PropertyDefinitionImpl.class)
+public interface PropertyDefinition extends BaseProperty {
+	
+	public static final String NAME = "PropertyDefinition"; // PropertyDefinition.class.getSimpleName();
 	
 }

src/main/java/org/gcube/informationsystem/types/reference/properties/PropertyTypeDefiniton.java

@@ -0,0 +1,11 @@
+package org.gcube.informationsystem.types.reference.properties;
+
+import org.gcube.informationsystem.base.reference.properties.BaseProperty;
+import org.gcube.informationsystem.types.reference.TypeDefinition;
+
+
+public interface PropertyTypeDefiniton<P extends BaseProperty> extends TypeDefinition<P>, BaseProperty {
+	
+	public static final String NAME = "PropertyTypeDefiniton"; // PropertyTypeDefiniton.class.getSimpleName();
+	
+}

src/main/java/org/gcube/informationsystem/types/reference/relations/RelationDefinition.java

@@ -0,0 +1,15 @@
+package org.gcube.informationsystem.types.reference.relations;
+
+import org.gcube.informationsystem.base.reference.entities.BaseEntity;
+import org.gcube.informationsystem.base.reference.relations.BaseRelation;
+import org.gcube.informationsystem.types.reference.TypeDefinition;
+import org.gcube.informationsystem.types.reference.entities.EntityDefinition;
+
+public interface RelationDefinition<Out extends BaseEntity, In extends BaseEntity, Rel extends BaseRelation<Out,In>>
+		extends TypeDefinition<Rel>, BaseRelation<EntityDefinition<Out>,EntityDefinition<In>> {
+	
+	public String getSourceType();
+	
+	public String getTargetType();
+	
+}

src/main/java/org/gcube/informationsystem/utils/AdditionalPropertiesSerializer.java

@@ -3,7 +3,7 @@ package org.gcube.informationsystem.utils;
 import java.io.IOException;
 import java.util.Map;
 
-import org.gcube.informationsystem.base.reference.properties.Property;
+import org.gcube.informationsystem.model.reference.properties.Property;
 
 import com.fasterxml.jackson.core.JsonGenerator;
 import com.fasterxml.jackson.databind.SerializerProvider;

src/main/java/org/gcube/informationsystem/utils/ObjectMappingERAction.java

@@ -3,8 +3,8 @@
  */
 package org.gcube.informationsystem.utils;
 
-import org.gcube.informationsystem.base.reference.properties.Property;
 import org.gcube.informationsystem.model.reference.entities.Entity;
+import org.gcube.informationsystem.model.reference.properties.Property;
 import org.gcube.informationsystem.model.reference.relations.Relation;
 import org.gcube.informationsystem.utils.discovery.SchemaAction;
 

src/main/java/org/gcube/informationsystem/utils/discovery/ISMDiscovery.java

@@ -10,8 +10,8 @@ import java.util.List;
 import java.util.Objects;
 
 import org.gcube.informationsystem.base.reference.ISManageable;
-import org.gcube.informationsystem.base.reference.properties.Property;
 import org.gcube.informationsystem.model.reference.entities.Entity;
+import org.gcube.informationsystem.model.reference.properties.Property;
 import org.gcube.informationsystem.model.reference.relations.Relation;
 import org.gcube.informationsystem.types.annotations.ISProperty;
 import org.slf4j.Logger;

src/main/java/org/gcube/informationsystem/utils/discovery/SchemaAction.java

@@ -3,8 +3,8 @@
  */
 package org.gcube.informationsystem.utils.discovery;
 
-import org.gcube.informationsystem.base.reference.properties.Property;
 import org.gcube.informationsystem.model.reference.entities.Entity;
+import org.gcube.informationsystem.model.reference.properties.Property;
 import org.gcube.informationsystem.model.reference.relations.Relation;
 
 /**

src/test/java/org/gcube/informationsystem/ContextTest.java

@@ -1,7 +1,7 @@
 /**
  * 
  */
-package org.gcube.informationsystem.model;
+package org.gcube.informationsystem;
 
 import java.io.IOException;
 import java.io.InputStream;

src/test/java/org/gcube/informationsystem/base/impl/properties/HeaderTest.java

@@ -1,11 +1,11 @@
-package org.gcube.informationsystem.model.impl.properties;
+package org.gcube.informationsystem.base.impl.properties;
 
 import java.util.Calendar;
 import java.util.Date;
 import java.util.UUID;
 
+import org.gcube.informationsystem.base.impl.properties.HeaderImpl;
 import org.gcube.informationsystem.base.reference.properties.Header;
-import org.gcube.informationsystem.model.impl.properties.HeaderImpl;
 import org.gcube.informationsystem.utils.ISMapper;
 import org.junit.Assert;
 import org.junit.Test;

src/test/java/org/gcube/informationsystem/impl/properties/EncryptedTest.java

@@ -1,14 +1,14 @@
-package org.gcube.informationsystem.model.impl.properties;
+package org.gcube.informationsystem.impl.properties;
 
 import java.security.Key;
 import java.security.SecureRandom;
 
 import javax.crypto.KeyGenerator;
 
-import org.gcube.informationsystem.base.reference.properties.Property;
+import org.gcube.informationsystem.ContextTest;
-import org.gcube.informationsystem.model.ContextTest;
 import org.gcube.informationsystem.model.impl.properties.EncryptedImpl;
 import org.gcube.informationsystem.model.reference.properties.Encrypted;
+import org.gcube.informationsystem.model.reference.properties.Property;
 import org.gcube.informationsystem.types.TypeBinder;
 import org.gcube.informationsystem.utils.ISMapper;
 import org.junit.Assert;

src/test/java/org/gcube/informationsystem/types/EntitySchemaDefinition.java

@@ -4,8 +4,8 @@
 package org.gcube.informationsystem.types;
 
 import org.gcube.informationsystem.base.reference.ISManageable;
+import org.gcube.informationsystem.base.reference.properties.BaseProperty;
 import org.gcube.informationsystem.base.reference.properties.Header;
-import org.gcube.informationsystem.base.reference.properties.Property;
 import org.gcube.informationsystem.model.reference.entities.Resource;
 import org.gcube.informationsystem.model.reference.relations.IsRelatedTo;
 import org.junit.Test;
@@ -23,7 +23,7 @@ public class EntitySchemaDefinition {
 
 	@Test
 	public void test() throws Exception {
-		Class<? extends Property> clz = Header.class;
+		Class<? extends BaseProperty> clz = Header.class;
 		String json = TypeBinder.serializeType(clz);
 		logger.trace(json);
 	}