BindingHandler.java
资源名称:swingx.zip [点击查看]
上传用户:zhengdagz
上传日期:2014-03-06
资源大小:1956k
文件大小:7k
源码类别:
xml/soap/webservice
开发平台:
Java
- /*
- * $Id $Exp
- *
- * Copyright 2004 Sun Microsystems, Inc., 4150 Network Circle,
- * Santa Clara, California 95054, U.S.A. All rights reserved.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
- package org.jdesktop.binding.swingx;
- import java.beans.PropertyChangeEvent;
- import java.beans.PropertyChangeListener;
- import java.beans.PropertyChangeSupport;
- import java.util.ArrayList;
- import java.util.Iterator;
- import java.util.List;
- import javax.swing.SwingUtilities;
- import org.jdesktop.binding.DataModel;
- import org.jdesktop.binding.metadata.Validator;
- /**
- * Container of Bindings. Responsible for doing validation/push/pull.
- * Listens to propertyChanges of contained Bindings.
- *
- * @author Jeanette Winzenburg
- */
- public class BindingHandler {
- private List bindings;
- private boolean modified;
- private PropertyChangeSupport propertySupport;
- private PropertyChangeListener bindingListener;
- private boolean autoCommit;
- public boolean isModified() {
- return modified;
- }
- public void add(Binding binding) {
- if (binding == null)
- return;
- getBindingList().add(binding);
- binding.addPropertyChangeListener(getBindingListener());
- // todo: update modified flag
- }
- public void remove(Binding binding) {
- if (binding == null)
- return;
- getBindingList().remove(binding);
- binding.removePropertyChangeListener(getBindingListener());
- // todo: update modified flag
- }
- public void removeAll() {
- for (Iterator iter = getBindingList().iterator(); iter.hasNext();) {
- Binding element = (Binding) iter.next();
- element.removePropertyChangeListener(getBindingListener());
- iter.remove();
- }
- setModified(false);
- }
- public Binding[] getBindings() {
- if (bindings != null) {
- return (Binding[]) bindings.toArray(new Binding[bindings.size()]);
- }
- return new Binding[0];
- }
- public boolean pull() {
- boolean result = true;
- for (Iterator iter = getBindingList().iterator(); iter.hasNext();) {
- Binding element = (Binding) iter.next();
- if (!element.pull()) {
- result = false;
- }
- }
- return result;
- }
- public boolean validate() {
- boolean result = true;
- ArrayList models = new ArrayList();
- for (Iterator iter = getBindingList().iterator(); iter.hasNext();) {
- Binding element = (Binding) iter.next();
- DataModel bindingModel = element.getDataModel();
- if (!models.contains(bindingModel)) {
- models.add(bindingModel);
- }
- if (!element.isValid()) {
- result = false;
- }
- }
- if (result) {
- for (int i = 0; i < models.size(); i++) {
- DataModel model = (DataModel) models.get(i);
- Validator validators[] = model.getValidators();
- for (int j = 0; j < validators.length; j++) {
- String error[] = new String[1];
- /** @todo aim: where to put error? */
- if (!validators[j].validate(model, /* getLocale() */null,
- error)) {
- result = false;
- }
- }
- }
- }
- return result;
- }
- public boolean push() {
- if (!validate()) {
- return false;
- }
- boolean result = true;
- for (Iterator iter = getBindingList().iterator(); iter.hasNext();) {
- Binding binding = (Binding) iter.next();
- if (!binding.push()) {
- result = false;
- }
- }
- return result;
- }
- // ---------------- property change support
- public void addPropertyChangeListener(PropertyChangeListener l) {
- if (propertySupport == null) {
- propertySupport = new PropertyChangeSupport(this);
- }
- propertySupport.addPropertyChangeListener(l);
- }
- public void removePropertyChangeListener(PropertyChangeListener l) {
- if (propertySupport == null)
- return;
- propertySupport.removePropertyChangeListener(l);
- }
- protected void firePropertyChange(String name, Object oldValue,
- Object newValue) {
- if (propertySupport == null)
- return;
- propertySupport.firePropertyChange(name, oldValue, newValue);
- }
- private PropertyChangeListener getBindingListener() {
- if (bindingListener == null) {
- bindingListener = createBindingListener();
- }
- return bindingListener;
- }
- protected PropertyChangeListener createBindingListener() {
- PropertyChangeListener l = new PropertyChangeListener() {
- public void propertyChange(PropertyChangeEvent evt) {
- if ("modified".equals(evt.getPropertyName())) {
- updateModifiedFromBinding((Binding) evt.getSource(), ((Boolean) evt.getNewValue())
- .booleanValue());
- }
- }
- };
- return l;
- }
- protected void updateModifiedFromBinding(Binding binding, boolean modified) {
- if (isAutoCommit() && modified) {
- invokePush(binding);
- return;
- }
- if (isModified())
- return;
- setModified(isModified() || modified);
- }
- private void invokePush(final Binding binding) {
- SwingUtilities.invokeLater(new Runnable() {
- public void run() {
- // PENDING: validation errors?
- boolean result = binding.push();
- setModified(!result);
- }
- });
- }
- private List getBindingList() {
- if (bindings == null) {
- bindings = new ArrayList();
- }
- return bindings;
- }
- private void setModified(boolean modified) {
- boolean oldModified = isModified();
- this.modified = modified;
- firePropertyChange("modified", oldModified, isModified());
- }
- /**
- * if true will push the values on every modified notification.
- *
- * @param autoCommit
- */
- public void setAutoCommit(boolean autoCommit) {
- boolean old = isAutoCommit();
- if (old == autoCommit) {
- return;
- }
- this.autoCommit = autoCommit;
- // think: before or after firing autocommit change?
- if (autoCommit && isModified()) {
- push();
- }
- firePropertyChange("autoCommit", old, isAutoCommit());
- }
- public boolean isAutoCommit() {
- // TODO Auto-generated method stub
- return autoCommit;
- }
- }