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/* |
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* The Apache Software License, Version 1.1 |
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* |
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* Copyright (c) 1999, 2000 The Apache Software Foundation. All rights |
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* reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. The end-user documentation included with the redistribution, if |
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* any, must include the following acknowlegement: |
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* "This product includes software developed by the |
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* Apache Software Foundation (http://www.apache.org/)." |
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* Alternately, this acknowlegement may appear in the software itself, |
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* if and wherever such third-party acknowlegements normally appear. |
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* |
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* 4. The names "The Jakarta Project", "Tomcat", and "Apache Software |
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* Foundation" must not be used to endorse or promote products derived |
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* from this software without prior written permission. For written |
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* permission, please contact apache@apache.org. |
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* |
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* 5. Products derived from this software may not be called "Apache" |
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* nor may "Apache" appear in their names without prior written |
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* permission of the Apache Group. |
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* |
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This software consists of voluntary contributions made by many |
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* individuals on behalf of the Apache Software Foundation. For more |
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* information on the Apache Software Foundation, please see |
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* <http://www.apache.org/>. |
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*/ |
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package org.apache.tools.ant.gui.customizer; |
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import org.apache.tools.ant.gui.LabelFieldGBC; |
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import java.lang.reflect.*; |
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import java.beans.*; |
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import javax.swing.*; |
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import java.util.Hashtable; |
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import java.util.Enumeration; |
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import java.awt.GridBagLayout; |
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import java.awt.GridBagConstraints; |
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import java.awt.Component; |
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/** |
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* Widget for dynamically constructing a property editor based on the |
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* an Object's BeanInfo. Essentially a property sheet. |
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* |
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* @version $Revision$ |
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* @author Simeon Fitch |
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*/ |
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public class DynamicCustomizer extends JPanel { |
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static { |
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PropertyEditorManager.registerEditor( |
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String.class, StringPropertyEditor.class); |
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PropertyEditorManager.registerEditor( |
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int.class, IntegerPropertyEditor.class); |
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PropertyEditorManager.registerEditor( |
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Integer.class, IntegerPropertyEditor.class); |
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PropertyEditorManager.registerEditor( |
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double.class, DoublePropertyEditor.class); |
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PropertyEditorManager.registerEditor( |
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Double.class, DoublePropertyEditor.class); |
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} |
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/** The type that this editor instance can handle. */ |
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private Class _type = null; |
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/** The value currently being edited. */ |
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private Object _value = null; |
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/** Mapping from PropertyDescriptor to PropertyEditor. */ |
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private Hashtable _prop2Editor = new Hashtable(); |
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/** Mapping from PropertyEditor to field PropertyDescriptor. */ |
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private Hashtable _editor2Prop = new Hashtable(); |
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/** Listener for receiving change events from the editors. */ |
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private EditorChangeListener _eListener = new EditorChangeListener(); |
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/** Read-only flag. */ |
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private boolean _readOnly = false; |
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/** |
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* Standard constructor. |
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* |
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* @param type Type that you are going to be creating and editor for. |
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*/ |
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public DynamicCustomizer(Class type) { |
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this(type, false); |
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} |
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/** |
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* Standard constructor. |
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* |
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* @param type Type that you are going to be creating and editor for. |
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* @param readOnly Set to true to create a read-only customizer. |
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*/ |
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public DynamicCustomizer(Class type, boolean readOnly) { |
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super(new GridBagLayout()); |
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_readOnly = readOnly; |
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_type = type; |
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LabelFieldGBC gbc = new LabelFieldGBC(); |
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try { |
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BeanInfo info = Introspector.getBeanInfo(type); |
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setBorder(BorderFactory.createTitledBorder( |
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info.getBeanDescriptor().getDisplayName())); |
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PropertyDescriptor[] props = info.getPropertyDescriptors(); |
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for(int i = 0; i < props.length; i++) { |
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if(props[i].getName().equals("class")) continue; |
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JLabel label = new JLabel(props[i].getDisplayName() + ":"); |
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// Lookup the editor. |
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PropertyEditor editor = getEditorForProperty(props[i]); |
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if(editor == null) continue; |
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// Add a listener to the editor so we know when to update |
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// the bean's fields. |
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editor.addPropertyChangeListener(_eListener); |
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// XXX What we need to do right here is provide a component |
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// that makes use of the "paintable" capability of the editor. |
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Component comp = editor.getCustomEditor(); |
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if(comp == null) { |
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comp = new JLabel("<<null editor>>"); |
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} |
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// See if it is a read-only property. If so, then just |
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// display it. |
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if(_readOnly || props[i].getWriteMethod() == null) { |
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comp.setEnabled(false); |
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} |
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// Setup the accellerator key. |
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label.setLabelFor(comp); |
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label.setDisplayedMnemonic(label.getText().charAt(0)); |
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// Set the tool tip text, if any. |
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String tip = props[i].getShortDescription(); |
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if(tip != null) { |
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label.setToolTipText(tip); |
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if(comp instanceof JComponent) { |
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((JComponent)comp).setToolTipText(tip); |
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} |
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} |
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// Add the label and fields. |
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add(label, gbc.forLabel()); |
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add(comp, gbc.forField()); |
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// Set the mappings between editor and property, etc. for |
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// quick lookup later. |
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_prop2Editor.put(props[i], editor); |
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_editor2Prop.put(editor, props[i]); |
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} |
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// Filler... |
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add(new JLabel(), gbc.forLastLabel()); |
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} |
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catch(Exception ex) { |
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ex.printStackTrace(); |
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} |
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} |
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/** |
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* Set the object to be edited. |
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* |
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* @param value The object to be edited. |
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*/ |
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public void setObject(Object value) { |
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if(!(_type.isInstance(value))) { |
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throw new IllegalArgumentException( |
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value.getClass() + " is not of type " + _type); |
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} |
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_value = value; |
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// Iterate over each property, doing a lookup on the associated editor |
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// and setting the editor's value to the value of the property. |
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Enumeration enum = _prop2Editor.keys(); |
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while(enum.hasMoreElements()) { |
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PropertyDescriptor desc = (PropertyDescriptor) enum.nextElement(); |
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PropertyEditor editor = (PropertyEditor) _prop2Editor.get(desc); |
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Method reader = desc.getReadMethod(); |
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if(reader != null) { |
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try { |
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Object val = reader.invoke(_value, null); |
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editor.setValue(val); |
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} |
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catch(IllegalAccessException ex) { |
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ex.printStackTrace(); |
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} |
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catch(InvocationTargetException ex) { |
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ex.getTargetException().printStackTrace(); |
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} |
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} |
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} |
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} |
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private PropertyEditor getEditorForProperty(PropertyDescriptor prop) { |
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PropertyEditor retval = null; |
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Class type = prop.getPropertyEditorClass(); |
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if(type != null) { |
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try { |
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retval = (PropertyEditor) type.newInstance(); |
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} |
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catch(Exception ex) { |
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ex.printStackTrace(); |
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} |
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} |
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// Handle case where there is no special editor |
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// associated with the property. In that case we ask the |
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// PropertyEditor manager for the editor registered for the |
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// given property type. |
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if(retval == null) { |
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retval = PropertyEditorManager.findEditor(prop.getPropertyType()); |
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} |
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return retval; |
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} |
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/** Class for receiving change events from teh PropertyEditor objects. */ |
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private class EditorChangeListener implements PropertyChangeListener { |
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public void propertyChange(PropertyChangeEvent e) { |
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PropertyEditor editor = (PropertyEditor) e.getSource(); |
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PropertyDescriptor prop = |
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(PropertyDescriptor) _editor2Prop.get(editor); |
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Method writer = prop.getWriteMethod(); |
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if(writer != null) { |
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try { |
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Object[] params = { editor.getValue() }; |
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writer.invoke(_value, params); |
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//firePropertyChange( |
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//prop.getName(), null, editor.getValue()); |
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} |
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catch(IllegalAccessException ex) { |
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ex.printStackTrace(); |
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} |
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catch(InvocationTargetException ex) { |
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ex.getTargetException().printStackTrace(); |
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} |
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} |
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} |
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} |
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/** |
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* Test code. |
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* |
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* @param args First arg is the class name to create |
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*/ |
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public static void main(String[] args) { |
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try { |
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Class c = Class.forName(args[0]); |
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JFrame f = new JFrame(c.getName()); |
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DynamicCustomizer custom = |
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new DynamicCustomizer(c); |
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custom.setObject(c.newInstance()); |
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f.getContentPane().add(custom); |
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f.pack(); |
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f.setVisible(true); |
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} |
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catch(Exception ex) { |
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ex.printStackTrace(); |
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} |
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} |
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} |
metasim
