Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.diagram / src / org / simantics / diagram / participant / ContextState.java

diff --git a/bundles/org.simantics.diagram/src/org/simantics/diagram/participant/ContextState.java b/bundles/org.simantics.diagram/src/org/simantics/diagram/participant/ContextState.java
new file mode 100644 (file)
index 0000000..002a66a
--- /dev/null
+++ b/bundles/org.simantics.diagram/src/org/simantics/diagram/participant/ContextState.java
@@ -0,0 +1,59 @@
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2013 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.diagram.participant;\r
+\r
+import java.util.Collection;\r
+import java.util.Collections;\r
+\r
+/**\r
+ * @author Tuukka Lehtonen\r
+ */\r
+public class ContextState {\r
+\r
+    private Collection<String> contexts;\r
+    private boolean            contextsSet;\r
+\r
+    public ContextState() {\r
+        this.contexts = Collections.emptyList();\r
+        this.contextsSet = false;\r
+    }\r
+\r
+    public ContextState(String context) {\r
+        this.contexts = Collections.singleton(context);\r
+        this.contextsSet = true;\r
+    }\r
+\r
+    public ContextState(Collection<String> contexts) {\r
+        setContexts(contexts);\r
+    }\r
+\r
+    void setContexts(Collection<String> contexts) {\r
+        if (contextsSet)\r
+            throw new IllegalStateException("contexts can only be set once");\r
+        this.contexts = Collections.unmodifiableCollection(contexts);\r
+        this.contextsSet = true;\r
+    }\r
+\r
+    Collection<String> getContexts() {\r
+        return contexts;\r
+    }\r
+\r
+    boolean contextsAreSet() {\r
+        return contextsSet;\r
+    }\r
+    \r
+    @Override\r
+    public String toString() {\r
+        return "ContextState : " + getContexts().toString();\r
+    }\r
+\r
+}\r