366 lines
12 KiB
Java
366 lines
12 KiB
Java
package org.gcube.informationsystem.utils;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.io.Reader;
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import java.io.Writer;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.Iterator;
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import java.util.List;
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import java.util.Map;
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import java.util.ServiceLoader;
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import org.gcube.informationsystem.base.reference.AccessType;
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import org.gcube.informationsystem.base.reference.Element;
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import org.gcube.informationsystem.types.TypeMapper;
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import org.gcube.informationsystem.types.reference.Type;
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import org.gcube.informationsystem.utils.discovery.ElementSpecilizationDiscovery;
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import org.gcube.informationsystem.utils.discovery.RegistrationProvider;
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import org.gcube.informationsystem.utils.discovery.SchemaAction;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import com.fasterxml.jackson.core.JsonGenerationException;
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import com.fasterxml.jackson.core.JsonParseException;
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import com.fasterxml.jackson.core.JsonProcessingException;
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import com.fasterxml.jackson.databind.DeserializationFeature;
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import com.fasterxml.jackson.databind.JavaType;
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import com.fasterxml.jackson.databind.JsonMappingException;
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import com.fasterxml.jackson.databind.JsonNode;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import com.fasterxml.jackson.databind.exc.InvalidTypeIdException;
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import com.fasterxml.jackson.databind.module.SimpleModule;
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import com.fasterxml.jackson.databind.node.ArrayNode;
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import com.fasterxml.jackson.databind.node.JsonNodeType;
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import com.fasterxml.jackson.databind.node.ObjectNode;
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import com.fasterxml.jackson.databind.node.TextNode;
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/**
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* @author Luca Frosini (ISTI - CNR)
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*/
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@SuppressWarnings("unchecked")
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public abstract class ElementMapper {
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private static Logger logger = LoggerFactory.getLogger(ElementMapper.class);
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protected static final ObjectMapper mapper;
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protected static final Map<String, Class<? extends Element>> knownTypes;
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// // protected static final Map<Class<? extends Element>, Class<? extends ElementImpl>> interfaceToImplementation;
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// protected static final Map<String, Class<? extends ElementImpl>> nameToImplementation;
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/**
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* @return the ObjectMapper
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*/
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public static ObjectMapper getObjectMapper() {
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return mapper;
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}
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static {
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mapper = new ObjectMapper();
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mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
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knownTypes = new HashMap<>();
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//interfaceToImplementation = new HashMap<>();
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// nameToImplementation = new HashMap<>();
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List<Package> packages = new ArrayList<Package>();
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/*
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Class<Type> tdClz = Type.class;
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ElementMapper.registerSubtypes(tdClz);
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packages.add(tdClz.getPackage());
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*/
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AccessType[] accessTypes = AccessType.values();
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for(AccessType accessType : accessTypes) {
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@SuppressWarnings("rawtypes")
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Class clz = accessType.getTypeClass();
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if(!Type.class.isAssignableFrom(clz)) {
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Class<Element> dummyClz = accessType.getDummyImplementationClass();
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if(dummyClz != null) {
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SimpleModule isModule = new SimpleModule(accessType.getName());
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isModule.addDeserializer(clz, new ElementDeserializer<>(clz, mapper));
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mapper.registerModule(isModule);
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ElementMapper.registerSubtypes(dummyClz);
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}
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/* else {
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ElementMapper.registerSubtypes(clz);
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}*/
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packages.add(clz.getPackage());
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}
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}
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registerPackages(packages);
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ServiceLoader<? extends RegistrationProvider> regsitrationProviders = ServiceLoader
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.load(RegistrationProvider.class);
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for(RegistrationProvider registrationProvider : regsitrationProviders) {
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registerPackages(registrationProvider.getPackagesToRegister());
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}
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}
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public static void registerPackages(List<Package> packages) {
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SchemaAction schemaAction = new ElementMappingAction();
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try {
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ElementSpecilizationDiscovery.manageISM(schemaAction, packages);
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} catch(Exception e) {
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logger.error("Error registering types", e);
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}
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}
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public static void registerPackages(Package... packages) {
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SchemaAction schemaAction = new ElementMappingAction();
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try {
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ElementSpecilizationDiscovery.manageISM(schemaAction, packages);
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} catch(Exception e) {
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logger.error("Error registering types", e);
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}
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}
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public static <El extends Element> void registerSubtypes(Class<El>... classes) {
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for(Class<El> clz : classes) {
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String typeName = TypeMapper.getType(clz);
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knownTypes.put(typeName, clz);
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// if(clz.isAnnotationPresent(JsonDeserialize.class)) {
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// JsonDeserialize jsonDeserialize = clz.getAnnotation(JsonDeserialize.class);
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// Class<? extends ElementImpl> impl = (Class<? extends ElementImpl>) jsonDeserialize.as();
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// nameToImplementation.put(typeName, impl);
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// }
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}
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mapper.registerSubtypes(classes);
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}
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/**
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* Write the serialization of a given resource to a given
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* {@link OutputStream} .
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*
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* @param object the resource
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* @param stream the stream in input
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* @throws IOException
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* @throws JsonMappingException
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* @throws JsonGenerationException
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*/
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public static <T extends OutputStream, ISM extends Element> T marshal(ISM object, T stream)
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throws JsonGenerationException, JsonMappingException, IOException {
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mapper.writeValue(stream, object);
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return stream;
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}
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/**
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* Write the serialization of a given resource to a given {@link Writer} .
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* @param object the resource
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* @param writer the writer in input
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* @throws IOException
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* @throws JsonMappingException
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* @throws JsonGenerationException
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*/
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public static <T extends Writer, ISM extends Element> T marshal(ISM object, T writer)
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throws JsonGenerationException, JsonMappingException, IOException {
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mapper.writeValue(writer, object);
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return writer;
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}
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/**
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* Return the String serialization of a given object
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* @param object the object to marshal
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* @return the String serialization of a given resource
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* @throws JsonProcessingException
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*/
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public static <El extends Element> String marshal(El object) throws JsonProcessingException {
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return mapper.writeValueAsString(object);
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}
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/**
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* Return the String serialization of a given list
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* @param list the list to marshal
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* @return the String serialization of a given list
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* @throws JsonProcessingException
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*/
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public static <El extends Element> String marshal(List<El> list) throws JsonProcessingException {
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JavaType type = mapper.getTypeFactory().constructCollectionType(List.class, Element.class);
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return mapper.writerFor(type).writeValueAsString(list);
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}
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/**
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* Return the String serialization of a given array
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* @param array the array to marshal
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* @return the String serialization of a given array
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* @throws JsonProcessingException
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*/
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public static <El extends Element> String marshal(El[] array) throws JsonProcessingException {
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return mapper.writeValueAsString(array);
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}
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/**
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* Creates a resource of given class from its serialization in a given
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* {@link Reader}.
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* @param clz the class of the resource
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* @param reader the reader
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* @return the resource
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* @throws JsonParseException
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* @throws JsonMappingException
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* @throws IOException
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*/
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public static <El extends Element> El unmarshal(Class<El> clz, Reader reader)
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throws JsonParseException, JsonMappingException, IOException {
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return mapper.readValue(reader, clz);
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}
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/**
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* Creates a resource of given class from its serialization in a given
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* {@link InputStream}.
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* @param clz the class of the resource
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* @param stream the stream
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* @return the resource
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* @throws IOException
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* @throws JsonMappingException
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* @throws JsonParseException
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*/
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public static <El extends Element> El unmarshal(Class<El> clz, InputStream stream)
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throws JsonParseException, JsonMappingException, IOException {
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return mapper.readValue(stream, clz);
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}
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public static JsonNode analizeJsonToReplaceType(JsonNode jsonNodeToAnalize, String typeIdToReplace) throws Exception {
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boolean replaced = false;
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String candidatedSuperClass = null;
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int index = 0;
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String typeId = null;
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if(jsonNodeToAnalize.has(Element.CLASS_PROPERTY)) {
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typeId = jsonNodeToAnalize.get(Element.CLASS_PROPERTY).asText();
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}
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if(typeId != null && typeIdToReplace.compareTo(typeId) == 0) {
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JsonNode superClassesTreeNode = jsonNodeToAnalize.get(Element.SUPERCLASSES_PROPERTY);
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if(superClassesTreeNode != null && superClassesTreeNode.isArray()) {
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ArrayNode arrayNode = (ArrayNode) superClassesTreeNode;
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for(int i = 0; i < arrayNode.size(); i++) {
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try {
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JsonNode jsonNode = arrayNode.get(i);
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JsonNodeType jsonNodeType = jsonNode.getNodeType();
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switch(jsonNodeType) {
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case STRING:
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String superClass = jsonNode.asText();
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try {
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Enum.valueOf(AccessType.class, superClass.toUpperCase());
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// It is one of the BaseType. Looking for
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// another type because the base one
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continue;
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} catch(Exception ex) {
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// can continue discovery
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}
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if(knownTypes.containsKey(superClass)) {
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candidatedSuperClass = superClass;
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index = i;
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}
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break;
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default:
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break;
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}
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if(candidatedSuperClass!=null) {
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break;
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}
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} catch(Exception ex) {
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// Trying the next one
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}
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}
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arrayNode.remove(index);
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((ObjectNode) jsonNodeToAnalize).set(Element.CLASS_PROPERTY, new TextNode(candidatedSuperClass));
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replaced = true;
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}
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}
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if(!replaced) {
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// continue to search inside the object
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Iterator<String> iterator = jsonNodeToAnalize.fieldNames();
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while(iterator.hasNext()) {
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String fieldName = iterator.next();
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JsonNode jn = jsonNodeToAnalize.get(fieldName);
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if(jn.getNodeType() == JsonNodeType.OBJECT) {
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try {
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JsonNode newValue = analizeJsonToReplaceType(jn,typeIdToReplace);
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replaced = true;
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((ObjectNode) jsonNodeToAnalize).set(fieldName, newValue);
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break;
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}catch (Exception e) {
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continue;
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}
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}
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}
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}
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if(!replaced) {
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throw new Exception();
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}
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return jsonNodeToAnalize;
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}
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/**
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* Creates a resource of given class from its serialization in a given String
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* @param clz the class of the resource
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* @param string
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* @return the resource
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* @throws JsonParseException
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* @throws JsonMappingException
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* @throws IOException
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*/
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public static <ISM extends Element> ISM unmarshal(Class<ISM> clz, String string)
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throws JsonParseException, JsonMappingException, IOException {
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try {
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return mapper.readValue(string, clz);
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} catch(InvalidTypeIdException e) {
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String typeId = e.getTypeId();
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JsonNode jsonNode = mapper.readTree(string);
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try {
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jsonNode = analizeJsonToReplaceType(jsonNode, typeId);
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}catch (Exception ex) {
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throw e;
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}
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return ElementMapper.unmarshal(clz, mapper.writeValueAsString(jsonNode));
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}
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}
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/**
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* Creates a resource of given class from its serialization in a given String
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* @param clz the class of the resource
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* @param string
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* @return the resource
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* @throws JsonParseException
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* @throws JsonMappingException
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* @throws IOException
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*/
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public static <ISM extends Element> ISM unmarshalWithReader(Class<ISM> clz, String string)
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throws JsonParseException, JsonMappingException, IOException {
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return mapper.readerFor(clz).readValue(string);
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}
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public static <ISM extends Element> List<ISM> unmarshalList(Class<ISM> clz, String string)
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throws JsonParseException, JsonMappingException, IOException {
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JavaType type = mapper.getTypeFactory().constructCollectionType(ArrayList.class, clz);
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return mapper.readValue(string, type);
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}
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public static <ISM extends Element> List<ISM> unmarshalList(String string)
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throws JsonParseException, JsonMappingException, IOException {
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JavaType type = mapper.getTypeFactory().constructCollectionType(ArrayList.class, Element.class);
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return mapper.readValue(string, type);
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}
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}
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