components/visual-panels/core/src/java/util/com/oracle/solaris/vp/util/common/propinfo/ReflectionPropInfo.java
changeset 827 0944d8c0158b
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/components/visual-panels/core/src/java/util/com/oracle/solaris/vp/util/common/propinfo/ReflectionPropInfo.java	Thu May 24 04:16:47 2012 -0400
@@ -0,0 +1,139 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright (c) 2008, 2012, Oracle and/or its affiliates. All rights reserved.
+ */
+
+package com.oracle.solaris.vp.util.common.propinfo;
+
+import java.beans.*;
+import java.lang.reflect.Method;
+import java.util.*;
+
+/**
+ * The {@code ReflectionPropInfo<T>} class uses reflection to manage a
+ * Java-Beans-style property of an object.
+ */
+public class ReflectionPropInfo<M, T> extends AbstractPropInfo<M, T> {
+    //
+    // Instance data
+    //
+
+    private String propName;
+    private Map<String, PropertyDescriptor> map =
+	new HashMap<String, PropertyDescriptor>();
+
+    //
+    // Constructors
+    //
+
+    public ReflectionPropInfo(String label, String description,
+	boolean sortable, boolean editable, String propName) {
+
+	super(label, description, sortable, editable);
+	this.propName = propName;
+    }
+
+    //
+    // PropInfo methods
+    //
+
+    @Override
+    @SuppressWarnings({"unchecked"})
+    public T getValue(M o) {
+	PropertyDescriptor descriptor = getPropertyDescriptor(o);
+	if (descriptor != null) {
+	    Method method = descriptor.getReadMethod();
+	    try {
+		return (T)method.invoke(o);
+	    } catch (Throwable e) {
+		// XXX Log
+//		System.err.printf("%s\n", e.getMessage());
+	    }
+	}
+
+	return null;
+    }
+
+    @Override
+    public boolean isEditable(M o) {
+	boolean editable = super.isEditable(o);
+
+	if (editable) {
+	    PropertyDescriptor descriptor = getPropertyDescriptor(o);
+	    if (descriptor != null) {
+		editable = descriptor.getWriteMethod() != null;
+	    }
+	}
+
+	return editable;
+    }
+
+    @Override
+    public void setValue(M o, T value) {
+	PropertyDescriptor descriptor = getPropertyDescriptor(o);
+	if (descriptor != null) {
+	    Method method = descriptor.getWriteMethod();
+	    try {
+		method.invoke(o, value);
+	    } catch (Throwable e) {
+		// XXX Log
+//		System.err.printf("%s\n", e.getMessage());
+	    }
+	}
+    }
+
+    //
+    // ReflectionPropInfo methods
+    //
+
+    public String getPropertyName() {
+	return propName;
+    }
+
+    //
+    // Private methods
+    //
+
+    private PropertyDescriptor getPropertyDescriptor(M o) {
+	synchronized (map) {
+	    Class c = o.getClass();
+	    String cName = o.getClass().getName();
+	    if (map.containsKey(cName)) {
+		return map.get(cName);
+	    }
+
+	    try {
+		BeanInfo info = Introspector.getBeanInfo(c);
+		for (PropertyDescriptor d : info.getPropertyDescriptors()) {
+		    if (d.getName().equals(propName)) {
+			map.put(cName, d);
+			return d;
+		    }
+		}
+	    } catch (IntrospectionException e) {
+	    }
+
+	    return null;
+	}
+    }
+}