Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.db.procore / src / fi / vtt / simantics / procore / internal / StatementChangeImpl.java

diff --git a/bundles/org.simantics.db.procore/src/fi/vtt/simantics/procore/internal/StatementChangeImpl.java b/bundles/org.simantics.db.procore/src/fi/vtt/simantics/procore/internal/StatementChangeImpl.java
new file mode 100644 (file)
index 0000000..ce5a94a
--- /dev/null
+++ b/bundles/org.simantics.db.procore/src/fi/vtt/simantics/procore/internal/StatementChangeImpl.java
@@ -0,0 +1,100 @@
+/*******************************************************************************\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 fi.vtt.simantics.procore.internal;\r
+\r
+import org.simantics.db.ChangeSet.StatementChange;\r
+import org.simantics.db.Resource;\r
+\r
+/**\r
+ * Intentionally implements hashCode and equals so that the {@link #claim}\r
+ * field is not counted as an ID of this instance.\r
+ * \r
+ * @author Tuukka Lehtonen\r
+ */\r
+final class StatementChangeImpl implements StatementChange {\r
+\r
+    private final Resource s;\r
+    private final Resource p;\r
+    private final Resource o;\r
+\r
+    /**\r
+     * Intentionally left package-modifiable through {@link #setClaim(boolean)}\r
+     * as an implementation-internal optimization by allowing reuse of the same\r
+     * StatementChangeImpl instance.\r
+     */\r
+    private boolean claim;\r
+\r
+    public StatementChangeImpl(final SessionImplSocket session, final int s, final int p, final int o, boolean claim) {\r
+        this.s = session.getResource(s);\r
+        this.p = session.getResource(p);\r
+        this.o = session.getResource(o);\r
+        this.claim = claim;\r
+    }\r
+    public StatementChangeImpl(final Resource s, final Resource p, final Resource o, boolean claim) {\r
+        this.s = s;\r
+        this.p = p;\r
+        this.o = o;\r
+        this.claim = claim;\r
+    }\r
+\r
+    @Override\r
+    public Resource getObject() {\r
+        return o;\r
+    }\r
+\r
+    @Override\r
+    final public Resource getPredicate() {\r
+        return p;\r
+    }\r
+\r
+    @Override\r
+    final public Resource getSubject() {\r
+        return s;\r
+    }\r
+\r
+    void setClaim(boolean claim) {\r
+        this.claim = claim;\r
+    }\r
+\r
+    public boolean isClaim() {\r
+        return claim;\r
+    }\r
+\r
+    @Override\r
+    public boolean isAsserted(Resource testSubject) {\r
+       return !s.equals(testSubject);\r
+    }\r
+\r
+    @Override\r
+    public int hashCode() {\r
+        return hashCode(s, p, o);\r
+    }\r
+    \r
+    public static int hashCode(Resource s, Resource p, Resource o) {\r
+        return 41 * ( 31 * s.hashCode() + p.hashCode()) + o.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 (StatementChangeImpl.class != object.getClass())\r
+            return false;\r
+        StatementChangeImpl r = (StatementChangeImpl) object;\r
+        return getSubject().equals(r.getSubject())\r
+        && getPredicate().equals(r.getPredicate())\r
+        && getObject().equals(r.getObject());\r
+    }\r
+}\r
+\r