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/*******************************************************************************
* Copyright (c) 2006, 2008 Oracle. All rights reserved. This
* program and the accompanying materials are made available under the terms of
* the Eclipse Public License v1.0 which accompanies this distribution, and is
* available at http://www.eclipse.org/legal/epl-v10.html
*
* Contributors: Oracle. - initial API and implementation
*******************************************************************************/
package org.eclipse.jpt.ui.internal.views;
import java.util.HashMap;
import java.util.Map;
import org.eclipse.core.resources.IFile;
import org.eclipse.jpt.core.JpaStructureNode;
import org.eclipse.jpt.core.utility.PlatformUtilities;
import org.eclipse.jpt.ui.JpaPlatformUi;
import org.eclipse.jpt.ui.JptUiPlugin;
import org.eclipse.jpt.ui.details.JpaDetailsPage;
import org.eclipse.jpt.ui.details.JpaDetailsProvider;
import org.eclipse.jpt.ui.internal.JptUiMessages;
import org.eclipse.jpt.ui.internal.Tracing;
import org.eclipse.jpt.ui.internal.platform.JpaPlatformUiRegistry;
import org.eclipse.jpt.ui.internal.selection.JpaSelection;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;
/**
* The JPA view that shows the details a mapping (either type or attribute).
*
* @version 2.0
* @since 1.0
*/
@SuppressWarnings("nls")
public class JpaDetailsView extends AbstractJpaView
{
/**
* The current <code>IJpaDetailsPage</code> that was retrieve based on the
* current selection.
*/
private JpaDetailsPage<JpaStructureNode> currentPage;
/**
* The current selection used to show the right <code>IJpaDetailsPage</code>.
*/
private JpaSelection currentSelection;
//TODO this is crap, a Map of Maps of Maps. Needs to be done differently, the factory/platform should handle caching instead
// key1 platform id
// key2 content type id
// key3 structure node type
// value Composite page
private Map<String, Map<String, Map<String, JpaDetailsPage<? extends JpaStructureNode>>>> detailsPages;
/**
* Creates a new <code>JpaDetailsView</code>.
*/
public JpaDetailsView() {
super(JptUiMessages.JpaDetailsView_viewNotAvailable);
}
@Override
protected void initialize() {
super.initialize();
this.currentSelection = JpaSelection.NULL_SELECTION;
this.detailsPages = new HashMap<String, Map<String, Map<String, JpaDetailsPage<? extends JpaStructureNode>>>>();
}
private JpaDetailsPage<? extends JpaStructureNode> buildDetailsPage(JpaStructureNode structureNode) {
JpaDetailsProvider detailsProvider = getDetailsProvider(structureNode);
if (detailsProvider == null) {
return null;
}
String id = structureNode.getId();
Composite container = getWidgetFactory().createComposite(getPageBook());
container.setLayout(new FillLayout(SWT.HORIZONTAL));
JpaDetailsPage<? extends JpaStructureNode> page = detailsProvider.buildDetailsPage(
container,
structureNode,
getWidgetFactory()
);
if (page != null) {
String platformId = structureNode.getJpaProject().getJpaPlatform().getId();
this.detailsPages.get(platformId);
Map<String, Map<String, JpaDetailsPage<? extends JpaStructureNode>>> platformDetailsPages = this.detailsPages.get(platformId);
if (platformDetailsPages == null) {
platformDetailsPages = new HashMap<String, Map<String, JpaDetailsPage<? extends JpaStructureNode>>>();
this.detailsPages.put(platformId, platformDetailsPages);
}
//not sure how this couldn't be a file, at least not if we are in JpaDetailsView trying to view it
IFile file = (IFile) structureNode.getResource();
//also, don't see how the contentType can be null, so not checking, can't have a JpaStructureNode without a contentType
String contentTypeId = PlatformUtilities.getContentType(file).getId();
Map<String, JpaDetailsPage<? extends JpaStructureNode>> contentTypeDetailsPages = platformDetailsPages.get(contentTypeId);
if (contentTypeDetailsPages == null) {
contentTypeDetailsPages = new HashMap<String, JpaDetailsPage<? extends JpaStructureNode>>();
platformDetailsPages.put(contentTypeId, contentTypeDetailsPages);
}
contentTypeDetailsPages.put(id, page);
}
return page;
}
@Override
public void dispose() {
this.detailsPages.clear();
this.currentSelection = JpaSelection.NULL_SELECTION;
this.currentPage = null;
super.dispose();
}
protected String getContentTypeId(JpaStructureNode structureNode) {
//not sure how this couldn't be a file, at least not if we are in JpaDetailsView trying to view it
IFile file = (IFile) structureNode.getResource();
//also, don't see how the contentType can be null, so not checking, can't have a JpaStructureNode without a contentType
return PlatformUtilities.getContentType(file).getId();
}
private JpaDetailsPage<? extends JpaStructureNode> getDetailsPage(JpaStructureNode structureNode) {
String platformId = structureNode.getJpaProject().getJpaPlatform().getId();
if (this.detailsPages.containsKey(platformId)) {
Map<String, Map<String, JpaDetailsPage<? extends JpaStructureNode>>> platformDetailsPages = this.detailsPages.get(platformId);
String contentTypeId = getContentTypeId(structureNode);
if (platformDetailsPages.containsKey(contentTypeId)) {
Map<String, JpaDetailsPage<? extends JpaStructureNode>> contentTypeDetailsPages = platformDetailsPages.get(contentTypeId);
if (contentTypeDetailsPages.containsKey(structureNode.getId())) {
JpaDetailsPage<? extends JpaStructureNode> page = contentTypeDetailsPages.get(structureNode.getId());
if ((page != null) &&
(page.getControl().isDisposed())) {
platformDetailsPages.remove(structureNode.getId());
}
else {
return page;
}
}
}
}
return buildDetailsPage(structureNode);
}
private JpaDetailsProvider getDetailsProvider(JpaStructureNode structureNode) {
String platformId = structureNode.getJpaProject().getJpaPlatform().getId();
JpaPlatformUi jpaPlatformUI = JpaPlatformUiRegistry.instance().getJpaPlatformUi(platformId);
return jpaPlatformUI.getDetailsProvider(structureNode);
}
public JpaSelection getSelection() {
return this.currentSelection;
}
private void log(String message) {
if (Tracing.booleanDebugOption(Tracing.UI_DETAILS_VIEW)) {
Tracing.log(message);
}
}
@Override
public void select(JpaSelection jpaSelection) {
if (jpaSelection.equals(this.currentSelection)) {
return;
}
this.currentSelection = jpaSelection;
if (jpaSelection != JpaSelection.NULL_SELECTION) {
JpaStructureNode newNode = jpaSelection.getSelectedNode();
JpaDetailsPage<? extends JpaStructureNode> newPage = getDetailsPage(newNode);
setCurrentPage(newPage);
}
else {
setCurrentPage(null);
}
}
/**
* Changes the current page and shows the given page.
*
* @param newPage The new page to display
*/
@SuppressWarnings("unchecked")
private void setCurrentPage(JpaDetailsPage<? extends JpaStructureNode> page) {
// Unpopulate old page
if (this.currentPage != null) {
try {
log("JpaDetailsView.setCurrentPage() : disposing of current page");
this.currentPage.setSubject(null);
}
catch (Exception e) {
JptUiPlugin.log(e);
}
}
JpaDetailsPage<JpaStructureNode> newPage = (JpaDetailsPage<JpaStructureNode>) page;
// Populate new page
if (page != null) {
try {
log("JpaDetailsView.setCurrentPage() : populating new page");
newPage.setSubject(this.currentSelection.getSelectedNode());
}
catch (Exception e) {
// Show error page
page = null;
JptUiPlugin.log(e);
}
}
else {
log("JpaDetailsView.setCurrentPage() : No page to populate");
}
//no need to show the page again if it is still the same
if (newPage != null && this.currentPage == newPage) {
return;
}
this.currentPage = newPage;
// Show new page
if (page == null) {
showDefaultPage();
}
else {
showPage(page.getControl());
}
}
}
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