Added method to get only the number of total items

pom.xml

@@ -59,12 +59,11 @@
 			<groupId>org.slf4j</groupId>
 			<artifactId>slf4j-api</artifactId>
 		</dependency>
-		<!-- Test Dependencies -->
 		<dependency>
 			<groupId>org.gcube.common</groupId>
 			<artifactId>gcube-jackson-databind</artifactId>
-			<scope>test</scope>
 		</dependency>
+		<!-- Test Dependencies -->
 		<dependency>
 			<groupId>junit</groupId>
 			<artifactId>junit</artifactId>

src/main/java/org/gcube/gcat/client/Item.java

@@ -8,6 +8,8 @@ import java.util.Map;
 import javax.ws.rs.WebApplicationException;
 import javax.xml.ws.WebServiceException;
 
+import org.gcube.com.fasterxml.jackson.databind.JsonNode;
+import org.gcube.com.fasterxml.jackson.databind.ObjectMapper;
 import org.gcube.gcat.api.GCatConstants;
 
 /**
@@ -23,11 +25,27 @@ public class Item extends GCatClient implements org.gcube.gcat.api.interfaces.It
 		super(enforcedServiceURL, ITEMS);
 	}
 	
+	@Override
+	public int count() throws WebServiceException {
+		Map<String, String> queryParams = new HashMap<>();
+		queryParams.put(GCatConstants.COUNT_ONLY_PARAMETER, String.valueOf(true));
+		String ret = this.list(queryParams);
+		ObjectMapper objectMapper = new ObjectMapper();
+		try {
+			JsonNode jsonNode = objectMapper.readTree(ret);
+			return jsonNode.get(Item.COUNT_KEY).asInt();
+		}catch (WebApplicationException e) {
+			throw e;
+		}catch (Exception e) {
+			throw new WebApplicationException(e);
+		}
+	}
+	
 	/**
-	 * List the item in the organization correspondent to the current VRE.
+	 * List the item in the organisation correspondent to the current VRE.
 	 * 
 	 * If the client is entitled to run at VO or ROOT level the method return all the item in all the organization
-	 * in the catalogue. To filter per organization used the method {@link #list(int, int, String)}
+	 * in the catalogue. To filter per organisation used the method {@link #list(int, int, String)}
 	 */
 	@Override
 	public String list(int limit, int offset) throws WebApplicationException {
@@ -43,7 +61,7 @@ public class Item extends GCatClient implements org.gcube.gcat.api.interfaces.It
 	}
 	
 	/**
-	 * List the item of a specific organization. 
+	 * List the item of a specific organisation. 
 	 * This API is only available if the client is entitles to run at VO and ROOT level.
 	 */
 	public String list(int limit, int offset, String organizationName) throws WebApplicationException {
@@ -103,4 +121,5 @@ public class Item extends GCatClient implements org.gcube.gcat.api.interfaces.It
 		super.delete(true, name);
 		return null;
 	}
+
 }