X-Git-Url: https://gerrit.simantics.org/r/gitweb?a=blobdiff_plain;f=bundles%2Forg.simantics.diagram%2Fsrc%2Forg%2Fsimantics%2Fdiagram%2Fparticipant%2FContextState.java;fp=bundles%2Forg.simantics.diagram%2Fsrc%2Forg%2Fsimantics%2Fdiagram%2Fparticipant%2FContextState.java;h=002a66aa10450f5526770a83c0e2f15822dcafb7;hb=969bd23cab98a79ca9101af33334000879fb60c5;hp=0000000000000000000000000000000000000000;hpb=866dba5cd5a3929bbeae85991796acb212338a08;p=simantics%2Fplatform.git

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
index 000000000..002a66aa1
--- /dev/null
+++ b/bundles/org.simantics.diagram/src/org/simantics/diagram/participant/ContextState.java
@@ -0,0 +1,59 @@
+/*******************************************************************************
+ * Copyright (c) 2007, 2013 Association for Decentralized Information Management
+ * in Industry THTH ry.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/epl-v10.html
+ *
+ * Contributors:
+ *     VTT Technical Research Centre of Finland - initial API and implementation
+ *******************************************************************************/
+package org.simantics.diagram.participant;
+
+import java.util.Collection;
+import java.util.Collections;
+
+/**
+ * @author Tuukka Lehtonen
+ */
+public class ContextState {
+
+    private Collection<String> contexts;
+    private boolean            contextsSet;
+
+    public ContextState() {
+        this.contexts = Collections.emptyList();
+        this.contextsSet = false;
+    }
+
+    public ContextState(String context) {
+        this.contexts = Collections.singleton(context);
+        this.contextsSet = true;
+    }
+
+    public ContextState(Collection<String> contexts) {
+        setContexts(contexts);
+    }
+
+    void setContexts(Collection<String> contexts) {
+        if (contextsSet)
+            throw new IllegalStateException("contexts can only be set once");
+        this.contexts = Collections.unmodifiableCollection(contexts);
+        this.contextsSet = true;
+    }
+
+    Collection<String> getContexts() {
+        return contexts;
+    }
+
+    boolean contextsAreSet() {
+        return contextsSet;
+    }
+    
+    @Override
+    public String toString() {
+        return "ContextState : " + getContexts().toString();
+    }
+
+}