--- /dev/null
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ * VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.db.common.request;\r
+\r
+import java.util.Collection;\r
+\r
+import org.simantics.databoard.binding.Binding;\r
+import org.simantics.db.ReadGraph;\r
+import org.simantics.db.Resource;\r
+import org.simantics.db.common.uri.ResourceToPossibleURI;\r
+import org.simantics.db.common.uri.ResourceToURI;\r
+import org.simantics.db.common.utils.NameUtils;\r
+import org.simantics.db.exception.DatabaseException;\r
+import org.simantics.db.request.AsyncRead;\r
+import org.simantics.db.request.Read;\r
+import org.simantics.layer0.Layer0;\r
+\r
+/**\r
+ * Facade class that aggregates the most common queries.\r
+ * \r
+ * Example:\r
+ * \r
+ * System.out.println( session.read( Queries.adapt(r, String.class) ) );\r
+ *\r
+ * @author Tuukka Lehtonen\r
+ * @author Toni Kalajainen\r
+ */\r
+public class Queries {\r
+\r
+ public static AsyncRead<Resource> resource(String uri) {\r
+ return new org.simantics.db.common.primitiverequest.Resource(uri);\r
+ }\r
+\r
+ public static Read<String> name(final Resource resource) {\r
+ return new ResourceRead<String>(resource) {\r
+ @Override\r
+ public String perform(ReadGraph graph) throws DatabaseException {\r
+ return graph.getRelatedValue(resource, Layer0.getInstance(graph).HasName);\r
+ }\r
+ };\r
+ }\r
+\r
+ public static Read<String> safeName(final Resource resource) {\r
+ return new ResourceRead<String>(resource) {\r
+ @Override\r
+ public String perform(ReadGraph graph) throws DatabaseException {\r
+ return NameUtils.getSafeName(graph, resource);\r
+ }\r
+ };\r
+ }\r
+\r
+ public static Read<String> name(final String uri) {\r
+ return new UnaryRead<String, String>(uri) {\r
+ @Override\r
+ public String perform(ReadGraph graph) throws DatabaseException {\r
+ Resource resource = graph.getResource(uri);\r
+ return graph.getRelatedValue(resource, Layer0.getInstance(graph).HasName);\r
+ }\r
+ };\r
+ }\r
+\r
+ public static Read<String> uri(Resource resource) {\r
+ return new ResourceToURI(resource);\r
+ }\r
+\r
+ public static Read<String> possibleUri(Resource resource) {\r
+ return new ResourceToPossibleURI(resource);\r
+ }\r
+\r
+ public static <T> Read<T> adapt(Resource resource, Class<T> target)\r
+ {\r
+ return new Adapt<T>(resource, target);\r
+ }\r
+\r
+ public static <T> Read<T> adapt(Resource resource, Class<T> target, boolean allowNull)\r
+ {\r
+ return new Adapt<T>(resource, target, allowNull);\r
+ }\r
+\r
+ public static <T> Read<T> adapt(Resource resource, Class<T> target, boolean allowNull, boolean uniqueResult)\r
+ {\r
+ return new Adapt<T>(resource, target, allowNull, uniqueResult);\r
+ }\r
+\r
+ public static Read<Boolean> isInstanceOf(Resource resource, Resource type)\r
+ {\r
+ return new IsInstanceOfQuery(resource, type);\r
+ }\r
+\r
+ public static Read<Boolean> isInstanceOf(Resource resource, String type)\r
+ {\r
+ return new IsInstanceOfQuery2(resource, type);\r
+ }\r
+\r
+ public static <T> Read<T> getRelatedValue(Resource subject, Resource relation, Binding binding)\r
+ {\r
+ return new ReadRelatedValue<T>(subject, relation, binding);\r
+ }\r
+\r
+ public static <T> Read<T> getRelatedValue(Resource subject, String relation, Binding binding)\r
+ {\r
+ return new ReadRelatedValue2<T>(subject, relation, binding);\r
+ }\r
+\r
+ public static <T> Read<T> getPossibleRelatedValue(Resource subject, Resource relation, Binding binding)\r
+ {\r
+ return new ReadPossibleRelatedValue<T>(subject, relation, binding);\r
+ }\r
+ \r
+ public static Read<Boolean> hasTag(Resource subject, Resource tag) {\r
+ return new HasTag(subject, tag);\r
+ }\r
+\r
+ public static ObjectsWithType objectsWithType(Resource subject, Resource subrelationOf, Resource instanceOf) {\r
+ return new ObjectsWithType(subject, subrelationOf, instanceOf);\r
+ }\r
+\r
+ public static Read<Resource> possibleObjectWithType(final Resource resource, final Resource predicate, final Resource type) {\r
+ return new PossibleObjectWithType(resource, predicate, type);\r
+ }\r
+ \r
+ public static Read<Resource> possibleObject(final Resource subject, final Resource predicate) {\r
+ return new Read<Resource>() {\r
+ @Override\r
+ public Resource perform(ReadGraph graph) throws DatabaseException {\r
+ return graph.getPossibleObject(subject, predicate);\r
+ }\r
+ }; \r
+ }\r
+ \r
+ public static Read<Collection<Resource>> objects(final Resource subject, final Resource predicate) {\r
+ return new Read<Collection<Resource>>() {\r
+ @Override\r
+ public Collection<Resource> perform(ReadGraph graph) throws DatabaseException {\r
+ return graph.getObjects(subject, predicate);\r
+ }\r
+ }; \r
+ } \r
+ \r
+ \r
+}\r
+\r
+\r
+class IsInstanceOfQuery implements Read<Boolean> {\r
+\r
+ final protected Resource resource;\r
+ final protected Resource type;\r
+\r
+ public IsInstanceOfQuery(Resource resource, Resource type) {\r
+ this.resource = resource;\r
+ this.type = type;\r
+ }\r
+\r
+ @Override\r
+ public int hashCode() {\r
+ return resource.hashCode() + 13 * type.hashCode();\r
+ }\r
+\r
+ @Override\r
+ public boolean equals(Object object) {\r
+ if (this == object)\r
+ return true;\r
+ else if (object == null)\r
+ return false;\r
+ else if (getClass() != object.getClass())\r
+ return false;\r
+ IsInstanceOfQuery other = (IsInstanceOfQuery) object;\r
+ return resource.equals(other.resource) && type.equals(other.type);\r
+ }\r
+\r
+ @Override\r
+ public Boolean perform(ReadGraph graph) throws DatabaseException {\r
+ return graph.isInstanceOf(resource, type);\r
+ }\r
+\r
+}\r
+\r
+class IsInstanceOfQuery2 implements Read<Boolean> {\r
+\r
+ final protected Resource resource;\r
+ final protected String type;\r
+\r
+ public IsInstanceOfQuery2(Resource resource, String type) {\r
+ this.resource = resource;\r
+ this.type = type;\r
+ }\r
+\r
+ @Override\r
+ public int hashCode() {\r
+ return resource.hashCode() + 13 * type.hashCode();\r
+ }\r
+\r
+ @Override\r
+ public boolean equals(Object object) {\r
+ if (this == object)\r
+ return true;\r
+ else if (object == null)\r
+ return false;\r
+ else if (getClass() != object.getClass())\r
+ return false;\r
+ IsInstanceOfQuery other = (IsInstanceOfQuery) object;\r
+ return resource.equals(other.resource) && type.equals(other.type);\r
+ }\r
+\r
+ @Override\r
+ public Boolean perform(ReadGraph graph) throws DatabaseException {\r
+ Resource typeResource = graph.getResource(type);\r
+ return graph.isInstanceOf(resource, typeResource);\r
+ }\r
+\r
+}\r
+\r
+\r
+class ReadRelatedValue<T> implements Read<T> {\r
+\r
+ Resource subject;\r
+ Resource relation;\r
+ Binding binding;\r
+\r
+ public ReadRelatedValue(Resource subject, Resource relation, Binding binding) {\r
+ this.subject = subject;\r
+ this.relation = relation;\r
+ this.binding = binding;\r
+ }\r
+\r
+ @Override\r
+ public int hashCode() {\r
+ return subject.hashCode() + 13 * relation.hashCode() + 7*binding.hashCode();\r
+ }\r
+\r
+ @Override\r
+ public boolean equals(Object object) {\r
+ if (this == object)\r
+ return true;\r
+ else if (object == null)\r
+ return false;\r
+ else if (getClass() != object.getClass())\r
+ return false;\r
+ ReadRelatedValue<?> other = (ReadRelatedValue<?>) object;\r
+ return subject.equals(other.subject) &&\r
+ relation.equals(other.relation) &&\r
+ binding.equals(other.binding);\r
+ }\r
+\r
+ @SuppressWarnings("unchecked")\r
+ @Override\r
+ public T perform(ReadGraph graph) throws DatabaseException {\r
+ return (T) graph.getRelatedValue(subject, relation, binding);\r
+ }\r
+}\r
+\r
+\r
+class ReadRelatedValue2<T> implements Read<T> {\r
+\r
+ Resource subject;\r
+ String relation;\r
+ Binding binding;\r
+\r
+ public ReadRelatedValue2(Resource subject, String relation, Binding binding) {\r
+ this.subject = subject;\r
+ this.relation = relation;\r
+ this.binding = binding;\r
+ }\r
+\r
+ @Override\r
+ public int hashCode() {\r
+ return subject.hashCode() + 13 * relation.hashCode() + 7*binding.hashCode();\r
+ }\r
+\r
+ @Override\r
+ public boolean equals(Object object) {\r
+ if (this == object)\r
+ return true;\r
+ else if (object == null)\r
+ return false;\r
+ else if (getClass() != object.getClass())\r
+ return false;\r
+ ReadRelatedValue2<?> other = (ReadRelatedValue2<?>) object;\r
+ return subject.equals(other.subject) &&\r
+ relation.equals(other.relation) &&\r
+ binding.equals(other.binding);\r
+ }\r
+\r
+ @SuppressWarnings("unchecked")\r
+ @Override\r
+ public T perform(ReadGraph graph) throws DatabaseException {\r
+ Resource relationResource = graph.getResource(relation);\r
+ return (T) graph.getRelatedValue(subject, relationResource, binding);\r
+ }\r
+}\r
+\r
+class ReadPossibleRelatedValue<T> implements Read<T> {\r
+\r
+ Resource subject;\r
+ Resource relation;\r
+ Binding binding;\r
+\r
+ public ReadPossibleRelatedValue(Resource subject, Resource relation, Binding binding) {\r
+ this.subject = subject;\r
+ this.relation = relation;\r
+ this.binding = binding;\r
+ }\r
+\r
+ @Override\r
+ public int hashCode() {\r
+ return subject.hashCode() + 13 * relation.hashCode() + 7*binding.hashCode() + 5453;\r
+ }\r
+\r
+ @Override\r
+ public boolean equals(Object object) {\r
+ if (this == object)\r
+ return true;\r
+ else if (object == null)\r
+ return false;\r
+ else if (getClass() != object.getClass())\r
+ return false;\r
+ ReadPossibleRelatedValue<?> other = (ReadPossibleRelatedValue<?>) object;\r
+ return subject.equals(other.subject) &&\r
+ relation.equals(other.relation) &&\r
+ binding.equals(other.binding);\r
+ }\r
+\r
+ @SuppressWarnings("unchecked")\r
+ @Override\r
+ public T perform(ReadGraph graph) throws DatabaseException {\r
+ return (T) graph.getPossibleRelatedValue(subject, relation, binding);\r
+ }\r
+}\r
+\r
+class HasTag extends ResourceRead2<Boolean> {\r
+ public HasTag(Resource subject, Resource tag) {\r
+ super(subject, tag);\r
+ }\r
+\r
+ @Override\r
+ public Boolean perform(ReadGraph graph) throws DatabaseException {\r
+ return Boolean.valueOf(graph.hasStatement(resource, resource2, resource));\r
+ }\r
+}
\ No newline at end of file
Code Review / simantics / platform.git / blobdiff