Java tutorial
/* * ==================================================================== * * The ObjectStyle Group Software License, Version 1.0 * * Copyright (c) 2006 The ObjectStyle Group and individual authors of the * software. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * 3. The end-user documentation included with the redistribution, if any, must * include the following acknowlegement: "This product includes software * developed by the ObjectStyle Group (http://objectstyle.org/)." Alternately, * this acknowlegement may appear in the software itself, if and wherever such * third-party acknowlegements normally appear. * * 4. The names "ObjectStyle Group" and "Cayenne" must not be used to endorse or * promote products derived from this software without prior written permission. * For written permission, please contact andrus@objectstyle.org. * * 5. Products derived from this software may not be called "ObjectStyle" nor * may "ObjectStyle" appear in their names without prior written permission of * the ObjectStyle Group. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 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For more information on the ObjectStyle * Group, please see <http://objectstyle.org/>. * */ package org.objectstyle.wolips.eomodeler.editors.relationship; import java.beans.PropertyChangeEvent; import java.beans.PropertyChangeListener; import org.eclipse.core.databinding.DataBindingContext; import org.eclipse.core.databinding.beans.BeansObservables; import org.eclipse.jface.databinding.swt.SWTObservables; import org.eclipse.jface.viewers.ISelection; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.swt.SWT; import org.eclipse.swt.layout.FormLayout; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Text; import org.eclipse.ui.IWorkbenchPart; import org.eclipse.ui.views.properties.tabbed.AbstractPropertySection; import org.eclipse.ui.views.properties.tabbed.TabbedPropertySheetPage; import org.objectstyle.wolips.baseforplugins.util.ComparisonUtils; import org.objectstyle.wolips.eomodeler.Messages; import org.objectstyle.wolips.eomodeler.core.model.EORelationship; import org.objectstyle.wolips.eomodeler.core.model.EORelationshipPath; import org.objectstyle.wolips.eomodeler.utils.BooleanUpdateValueStrategy; import org.objectstyle.wolips.eomodeler.utils.FormUtils; import org.objectstyle.wolips.eomodeler.utils.UglyFocusHackWorkaroundListener; public class EORelationshipAdvancedEditorSection extends AbstractPropertySection { private EORelationship _relationship; private Text _numberOfToManyFaultsToBatchFetchText; private Button _ownsDestinationButton; private Button _propagatesPrimaryKeyButton; private Button _clientClassPropertyButton; private Button _commonClassPropertyButton; private DataBindingContext _bindingContext; private RelationshipPropertyChangeListener _relationshipPropertyChangeListener; public EORelationshipAdvancedEditorSection() { _relationshipPropertyChangeListener = new RelationshipPropertyChangeListener(); } public void createControls(Composite parent, TabbedPropertySheetPage tabbedPropertySheetPage) { super.createControls(parent, tabbedPropertySheetPage); Composite form = getWidgetFactory().createFlatFormComposite(parent); FormLayout formLayout = new FormLayout(); form.setLayout(formLayout); Composite topForm = FormUtils.createForm(getWidgetFactory(), form); getWidgetFactory().createCLabel(topForm, Messages.getString("EORelationship." + EORelationship.NUMBER_OF_TO_MANY_FAULTS_TO_BATCH_FETCH), SWT.NONE); _numberOfToManyFaultsToBatchFetchText = new Text(topForm, SWT.BORDER); GridData nameFieldLayoutData = new GridData(GridData.FILL_HORIZONTAL); _numberOfToManyFaultsToBatchFetchText.setLayoutData(nameFieldLayoutData); UglyFocusHackWorkaroundListener.addListener(_numberOfToManyFaultsToBatchFetchText); getWidgetFactory().createCLabel(topForm, "", SWT.NONE); _ownsDestinationButton = new Button(topForm, SWT.CHECK); _ownsDestinationButton.setText(Messages.getString("EORelationship." + EORelationship.OWNS_DESTINATION)); getWidgetFactory().createCLabel(topForm, "", SWT.NONE); _propagatesPrimaryKeyButton = new Button(topForm, SWT.CHECK); _propagatesPrimaryKeyButton .setText(Messages.getString("EORelationship." + EORelationship.PROPAGATES_PRIMARY_KEY)); getWidgetFactory().createCLabel(topForm, "", SWT.NONE); _clientClassPropertyButton = new Button(topForm, SWT.CHECK); _clientClassPropertyButton .setText(Messages.getString("EORelationship." + EORelationship.CLIENT_CLASS_PROPERTY)); getWidgetFactory().createCLabel(topForm, "", SWT.NONE); _commonClassPropertyButton = new Button(topForm, SWT.CHECK); _commonClassPropertyButton .setText(Messages.getString("EORelationship." + EORelationship.COMMON_CLASS_PROPERTY)); } public void setInput(IWorkbenchPart part, ISelection selection) { if (ComparisonUtils.equals(selection, getSelection())) { return; } super.setInput(part, selection); disposeBindings(); Object selectedObject = ((IStructuredSelection) selection).getFirstElement(); if (selectedObject instanceof EORelationship) { _relationship = (EORelationship) selectedObject; } else if (selectedObject instanceof EORelationshipPath) { _relationship = ((EORelationshipPath) selectedObject).getChildRelationship(); } if (_relationship != null) { _relationship.addPropertyChangeListener(EORelationship.TO_MANY, _relationshipPropertyChangeListener); _bindingContext = new DataBindingContext(); _bindingContext.bindValue( SWTObservables.observeText(_numberOfToManyFaultsToBatchFetchText, SWT.Modify), BeansObservables .observeValue(_relationship, EORelationship.NUMBER_OF_TO_MANY_FAULTS_TO_BATCH_FETCH), null, null); // new BindSpec(null, null, new RegexStringValidator("^[0-9]*$", // "^[0-9]+$", "Please enter a number"), null) _bindingContext.bindValue(SWTObservables.observeSelection(_ownsDestinationButton), BeansObservables.observeValue(_relationship, EORelationship.OWNS_DESTINATION), null, new BooleanUpdateValueStrategy()); _bindingContext.bindValue(SWTObservables.observeSelection(_propagatesPrimaryKeyButton), BeansObservables.observeValue(_relationship, EORelationship.PROPAGATES_PRIMARY_KEY), null, new BooleanUpdateValueStrategy()); _bindingContext.bindValue(SWTObservables.observeSelection(_clientClassPropertyButton), BeansObservables.observeValue(_relationship, EORelationship.CLIENT_CLASS_PROPERTY), null, new BooleanUpdateValueStrategy()); _bindingContext.bindValue(SWTObservables.observeSelection(_commonClassPropertyButton), BeansObservables.observeValue(_relationship, EORelationship.COMMON_CLASS_PROPERTY), null, new BooleanUpdateValueStrategy()); updateCardinalityEnabled(); } } protected void updateCardinalityEnabled() { Boolean isToMany = _relationship.isToMany(); boolean enabled = (isToMany != null && isToMany.booleanValue()); _numberOfToManyFaultsToBatchFetchText.setEnabled(enabled); } protected void removeRelationshipListeners() { if (_relationship != null) { _relationship.removePropertyChangeListener(EORelationship.TO_MANY, _relationshipPropertyChangeListener); } } protected void disposeBindings() { if (_bindingContext != null) { _bindingContext.dispose(); } removeRelationshipListeners(); } public void dispose() { super.dispose(); disposeBindings(); } protected class RelationshipPropertyChangeListener implements PropertyChangeListener { public void propertyChange(PropertyChangeEvent event) { EORelationshipAdvancedEditorSection.this.updateCardinalityEnabled(); } } }