git-svn-id: https://www.simantics.org/svn/simantics/3d/trunk@22280 ac1ea38d-2e2b...

[simantics/3d.git] / org.simantics.g3d / src / org / simantics / proconf / g3d / common / StructuredResourceSelection.java

diff --git a/org.simantics.g3d/src/org/simantics/proconf/g3d/common/StructuredResourceSelection.java b/org.simantics.g3d/src/org/simantics/proconf/g3d/common/StructuredResourceSelection.java
new file mode 100644 (file)
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+++ b/org.simantics.g3d/src/org/simantics/proconf/g3d/common/StructuredResourceSelection.java
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+/*******************************************************************************\r
+ * Copyright (c) 2007- VTT Technical Research Centre of Finland.\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.proconf.g3d.common;\r
+\r
+import java.util.ArrayList;\r
+import java.util.Arrays;\r
+import java.util.Iterator;\r
+import java.util.List;\r
+\r
+import org.eclipse.jface.viewers.IStructuredSelection;\r
+import org.simantics.db.Resource;\r
+\r
+\r
+/**\r
+ * StructuredSelection that contains ResourceSelections\r
+ * \r
+ * @author Marko Luukkainen\r
+ * @author Tuukka Lehtonen\r
+ */\r
+public class StructuredResourceSelection implements IStructuredSelection {\r
+    \r
+    public static final StructuredResourceSelection EMPTY = new StructuredResourceSelection() {\r
+        // Create an empty fixed size List to ensure the list is not modified.\r
+        private List<Resource> empty = Arrays.asList(); \r
+        \r
+        public void add(Resource rs) {\r
+            throw new UnsupportedOperationException("BUG: attempted to modify StructuredResourceSelection.EMPTY");\r
+        }\r
+        public List<Resource> getSelectionList() {\r
+            return empty;\r
+        }\r
+    };\r
+\r
+    private List<Resource> selections;\r
+    \r
+    /**\r
+     * Creates a new selection that doesn't contain any items\r
+     */\r
+    public StructuredResourceSelection() {\r
+    }\r
+\r
+    public StructuredResourceSelection(Resource rs) {\r
+        getSelectionList().add(rs);\r
+    }\r
+\r
+    public StructuredResourceSelection(Resource... rss) {\r
+        List<Resource> s = getSelectionList();\r
+        for (Resource rs : rss)\r
+            s.add(rs);\r
+    }\r
+\r
+    public void add(Resource rs) {\r
+        getSelectionList().add(rs);\r
+    }\r
+\r
+    public List<Resource> getSelectionList() {\r
+        if (selections == null) {\r
+            selections = new ArrayList<Resource>();\r
+        }\r
+        return selections;\r
+    }\r
+\r
+    /*\r
+     * (non-Javadoc)\r
+     * \r
+     * @see org.eclipse.jface.viewers.ISelection#isEmpty()\r
+     */\r
+    public boolean isEmpty() {\r
+        return selections == null || selections.isEmpty();\r
+    }\r
+\r
+    /*\r
+     * (non-Javadoc)\r
+     * \r
+     * @see org.eclipse.jface.viewers.IStructuredSelection#getFirstElement()\r
+     */\r
+    public Object getFirstElement() {\r
+        if (!isEmpty())\r
+            return selections.get(0);\r
+        return null;\r
+    }\r
+\r
+    /*\r
+     * (non-Javadoc)\r
+     * \r
+     * @see org.eclipse.jface.viewers.IStructuredSelection#iterator()\r
+     */\r
+    public Iterator<Resource> iterator() {\r
+        return getSelectionList().iterator();\r
+    }\r
+\r
+    /*\r
+     * (non-Javadoc)\r
+     * \r
+     * @see org.eclipse.jface.viewers.IStructuredSelection#size()\r
+     */\r
+    public int size() {\r
+        return selections == null ? 0 : selections.size();\r
+    }\r
+\r
+    /*\r
+     * (non-Javadoc)\r
+     * \r
+     * @see org.eclipse.jface.viewers.IStructuredSelection#toArray()\r
+     */\r
+    public Object[] toArray() {\r
+        return selections == null ? new Object[0] : selections.toArray();\r
+    }\r
+\r
+    /*\r
+     * (non-Javadoc)\r
+     * \r
+     * @see org.eclipse.jface.viewers.IStructuredSelection#toList()\r
+     */\r
+    public List<Resource> toList() {\r
+        return selections == null ? Arrays.asList(new Resource[0]) : selections;\r
+    }\r
+\r
+    /**\r
+     * Returns whether this structured selection is equal to the given object.\r
+     * Two structured selections are equal iff they contain the same elements\r
+     * in the same order.\r
+     *\r
+     * @param o the other object\r
+     * @return <code>true</code> if they are equal, and <code>false</code> otherwise\r
+     */\r
+    public boolean equals(Object o) {\r
+        if (this == o) {\r
+            return true;\r
+        }\r
+        // null and other classes\r
+        if (!(o instanceof StructuredResourceSelection)) {\r
+            return false;\r
+        }\r
+        StructuredResourceSelection other = (StructuredResourceSelection) o;\r
+\r
+        // either or both empty?\r
+        if (isEmpty()) {\r
+            return other.isEmpty();\r
+        }\r
+        if (other.isEmpty()) {\r
+            return false;\r
+        }\r
+\r
+        // check size\r
+        if (size() != other.size())\r
+            return false;\r
+        \r
+        // element comparison\r
+        Iterator<Resource> it = iterator();\r
+        Iterator<Resource> otherIt = other.iterator();\r
+        while (it.hasNext()) {\r
+            if (!it.next().equals(otherIt.next()))\r
+                return false;\r
+        }\r
+        \r
+        return true;\r
+    }\r
+    \r
+    @Override\r
+    public String toString() {\r
+       return Arrays.toString(getSelectionList().toArray());\r
+    }\r
+    \r
+}\r