Migrated source code from Simantics SVN

[simantics/platform.git] / bundles / org.simantics.browsing.ui.common / src / org / simantics / browsing / ui / common / Testers.java

diff --git a/bundles/org.simantics.browsing.ui.common/src/org/simantics/browsing/ui/common/Testers.java b/bundles/org.simantics.browsing.ui.common/src/org/simantics/browsing/ui/common/Testers.java
new file mode 100644 (file)
index 0000000..acf192d
--- /dev/null
+++ b/bundles/org.simantics.browsing.ui.common/src/org/simantics/browsing/ui/common/Testers.java
@@ -0,0 +1,104 @@
+/*******************************************************************************\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.browsing.ui.common;\r
+\r
+import org.simantics.browsing.ui.BuiltinKeys;\r
+import org.simantics.browsing.ui.NodeContext;\r
+import org.simantics.browsing.ui.NodeContext.ConstantKey;\r
+import org.simantics.browsing.ui.NodeQueryManager;\r
+import org.simantics.browsing.ui.Tester;\r
+import org.simantics.browsing.ui.common.node.StandardNodes;\r
+\r
+public final class Testers {\r
+\r
+    /**\r
+     * Simple pass all tester.\r
+     */\r
+    public static final Tester PASS = new Tester() {\r
+        @Override\r
+        public boolean test(NodeQueryManager manager, NodeContext context) {\r
+            return true;\r
+        }\r
+        @Override\r
+        public String toString() {\r
+            return "PASS test";\r
+        }\r
+    };\r
+\r
+    /**\r
+     * Simple fail all tester.\r
+     */\r
+    public static final Tester FAIL = new Tester() {\r
+        @Override\r
+        public boolean test(NodeQueryManager manager, NodeContext context) {\r
+            return false;\r
+        }\r
+        @Override\r
+        public String toString() {\r
+            return "FAIL test";\r
+        }\r
+    };\r
+\r
+    /**\r
+     * @param clazz\r
+     * @return tester for checking whether node context input is an instance of\r
+     *         the specified class\r
+     */\r
+    public static Tester instanceOfTester(final Class<?> clazz) {\r
+        return new Tester() {\r
+            @Override\r
+            public boolean test(NodeQueryManager manager, NodeContext context) {\r
+                return clazz.isInstance(context.getConstant(BuiltinKeys.INPUT));\r
+            }\r
+            @Override\r
+            public String toString() {\r
+                return "class " + clazz.getName() + " test";\r
+            }\r
+        };\r
+    }\r
+\r
+    public static Tester standardFunctionTester(final Object object) {\r
+               return new Tester() {\r
+                       \r
+                       @Override\r
+                       public boolean test(NodeQueryManager manager, NodeContext context) {\r
+                               Object function = context.getConstant(StandardNodes.FUNCTION);\r
+                               return object.equals(function);\r
+                       }\r
+                       \r
+               };\r
+    }\r
+    \r
+    public static <T> Tester exists(final ConstantKey<T> key) {\r
+               return new Tester() {\r
+                       \r
+                       @Override\r
+                       public boolean test(NodeQueryManager manager, NodeContext context) {\r
+                               return context.getConstant(key) != null;\r
+                       }\r
+                       \r
+               };\r
+    }\r
+\r
+    public static Tester and(final Tester ... testers) {\r
+               return new Tester() {\r
+                       \r
+                       @Override\r
+                       public boolean test(NodeQueryManager manager, NodeContext context) {\r
+                               for(Tester tester : testers) if(!tester.test(manager, context)) return false;\r
+                               return true;\r
+                       }\r
+                       \r
+               };\r
+    }\r
+    \r
+}\r