--- /dev/null
+/*******************************************************************************\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
+/*\r
+ *\r
+ * @author Toni Kalajainen\r
+ */\r
+package org.simantics.g2d.canvas.impl;\r
+\r
+import java.lang.annotation.ElementType;\r
+import java.lang.annotation.Retention;\r
+import java.lang.annotation.RetentionPolicy;\r
+import java.lang.annotation.Target;\r
+import java.lang.reflect.InvocationTargetException;\r
+import java.lang.reflect.Method;\r
+import java.util.ArrayList;\r
+import java.util.List;\r
+\r
+import org.simantics.g2d.canvas.SGDesignation;\r
+import org.simantics.scenegraph.g2d.G2DParentNode;\r
+\r
+\r
+public class SGNodeReflection {\r
+\r
+ @Retention(RetentionPolicy.RUNTIME)\r
+ @Target(ElementType.METHOD)\r
+ public static @interface SGInit {\r
+ SGDesignation designation() default SGDesignation.CANVAS;\r
+ }\r
+\r
+ @Retention(RetentionPolicy.RUNTIME)\r
+ @Target(ElementType.METHOD)\r
+ public static @interface SGCleanup {\r
+ }\r
+\r
+ /**\r
+ * Scans an object with reflection for all painter methods and returns\r
+ * an array of ICanvasPainters and priorities.\r
+ * <p>\r
+ * The corresponding class of obj must contain methods that meet the following\r
+ * criteria:\r
+ * 1) no return value\r
+ * 2) 1 argument, which is Graphics2D\r
+ * 3) has annotation Painter\r
+ * 4) may not throw any Exception\r
+ * 5) method must be accessible\r
+ * <p>\r
+ * Example:\r
+ *\r
+ * @Painter(priority = Integer.MIN_VALUE)\r
+ * public void prePaint(GraphicsContext gc) {\r
+ * }\r
+ *\r
+ * @param obj object to scan\r
+ * @return an array of painters and their priorities\r
+ */\r
+ public static CanvasSGNodeDefinition[] getSGHandlers(final Object obj)\r
+ {\r
+ List<CanvasSGNodeDefinition> result = new ArrayList<CanvasSGNodeDefinition>();\r
+ Class<?> clazz = obj.getClass();\r
+\r
+ for (final Method m : clazz.getMethods()) {\r
+ SGInit initAnno = m.getAnnotation(SGInit.class);\r
+ if (initAnno==null) continue;\r
+\r
+ SGDesignation initDesignation = initAnno.designation();\r
+\r
+ Class<?> returnType = m.getReturnType();\r
+ if (!returnType.equals(void.class))\r
+ throw new RuntimeException(clazz.getName()+"."+m.getName()+" return type is invalid");\r
+\r
+ @SuppressWarnings("rawtypes")\r
+ Class[] argTypes = m.getParameterTypes();\r
+ if (argTypes.length!=1 || !argTypes[0].equals(G2DParentNode.class))\r
+ throw new RuntimeException(clazz.getName()+"."+m.getName()+" invalid arguments");\r
+\r
+ @SuppressWarnings("rawtypes")\r
+ Class[] exceptionTypes = m.getExceptionTypes();\r
+ if (exceptionTypes.length!=0)\r
+ throw new RuntimeException(clazz.getName()+"."+m.getName()+" invalid exceptions");\r
+\r
+ try {\r
+ m.setAccessible(true);\r
+ } catch (Throwable t)\r
+ {\r
+ t.printStackTrace();\r
+ throw new Error(t);\r
+ }\r
+\r
+ CanvasSGNodeDefinition def = new CanvasSGNodeDefinition(m, initDesignation, null, obj);\r
+ result.add(def);\r
+ }\r
+\r
+ for (final Method m : clazz.getMethods()) {\r
+ SGCleanup cleanupAnno = m.getAnnotation(SGCleanup.class);\r
+ if (cleanupAnno==null) continue;\r
+\r
+ Class<?> returnType = m.getReturnType();\r
+ if (!returnType.equals(void.class))\r
+ throw new RuntimeException(clazz.getName()+"."+m.getName()+" return type is invalid");\r
+\r
+ @SuppressWarnings("rawtypes")\r
+ Class[] argTypes = m.getParameterTypes();\r
+ if (argTypes.length!=0)\r
+ throw new RuntimeException(clazz.getName()+"."+m.getName()+" invalid arguments");\r
+\r
+ @SuppressWarnings("rawtypes")\r
+ Class[] exceptionTypes = m.getExceptionTypes();\r
+ if (exceptionTypes.length!=0)\r
+ throw new RuntimeException(clazz.getName()+"."+m.getName()+" invalid exceptions");\r
+\r
+ try {\r
+ m.setAccessible(true);\r
+ } catch (Throwable t)\r
+ {\r
+ t.printStackTrace();\r
+ throw new Error(t);\r
+ }\r
+\r
+ CanvasSGNodeDefinition def = new CanvasSGNodeDefinition(null, null, m, obj);\r
+ result.add(def);\r
+ }\r
+\r
+ return result.toArray(new CanvasSGNodeDefinition[0]);\r
+ }\r
+\r
+ public static class CanvasSGNodeDefinition { // FIXME: own classes for init and cleanup\r
+ public final Method initMethod;\r
+ public final SGDesignation initDesignation;\r
+ public final Method cleanupMethod;\r
+ public final Object obj;\r
+\r
+ public void init(G2DParentNode parent) {\r
+ if(initMethod == null) return;\r
+ try {\r
+ initMethod.invoke(obj, parent);\r
+ } catch (IllegalArgumentException e) {\r
+ throw new Error(e);\r
+ } catch (IllegalAccessException e) {\r
+ throw new Error(e);\r
+ } catch (InvocationTargetException e) {\r
+ throw new RuntimeException(e.getCause());\r
+ }\r
+ }\r
+ public void cleanup() {\r
+ if(cleanupMethod == null) return;\r
+ try {\r
+ cleanupMethod.invoke(obj);\r
+ } catch (IllegalArgumentException e) {\r
+ throw new Error(e);\r
+ } catch (IllegalAccessException e) {\r
+ throw new Error(e);\r
+ } catch (InvocationTargetException e) {\r
+ throw new RuntimeException(e.getCause());\r
+ }\r
+ }\r
+ public CanvasSGNodeDefinition(Method initMethod, SGDesignation initDesignation, Method cleanupMethod, Object obj) {\r
+ this.initMethod = initMethod;\r
+ this.initDesignation = initDesignation;\r
+ this.cleanupMethod = cleanupMethod;\r
+ this.obj = obj;\r
+ }\r
+ @Override\r
+ public String toString() {\r
+ return String.format("%s %s %s %s",\r
+ obj.getClass().getSimpleName(),\r
+ initMethod != null ? initMethod.getName() : "no init method",\r
+ initDesignation != null ? initDesignation.toString() : "no init designation",\r
+ cleanupMethod != null ? cleanupMethod.getName() : "no cleanup method");\r
+ }\r
+ }\r
+}\r
Code Review / simantics / platform.git / blobdiff