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/*******************************************************************************
* Copyright (c) 2000, 2015 IBM Corporation and others.
* 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.search2.internal.ui;
import java.util.HashMap;
import java.util.Map;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.ISafeRunnable;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.SafeRunner;
import org.eclipse.jface.util.SafeRunnable;
import org.eclipse.search.internal.ui.SearchPlugin;
import org.eclipse.search.ui.ISearchResult;
import org.eclipse.search.ui.ISearchResultPage;
public class SearchPageRegistry {
public static final String ID_EXTENSION_POINT= "org.eclipse.search.searchResultViewPages"; //$NON-NLS-1$
public static final String ATTRIB_SEARCH_RESULT_CLASS= "searchResultClass"; //$NON-NLS-1$
public static final String ATTRIB_ID= "id"; //$NON-NLS-1$
public static final String ATTRIB_LABEL= "label"; //$NON-NLS-1$
public static final String ATTRIB_ICON= "icon"; //$NON-NLS-1$
public static final String ATTRIB_HELP_CONTEXT= "helpContextId"; //$NON-NLS-1$
private final Map<String, IConfigurationElement> fResultClassNameToExtension;
private final Map<IConfigurationElement, ISearchResultPage> fExtensionToInstance;
private final IConfigurationElement[] fExtensions;
public SearchPageRegistry() {
fExtensionToInstance= new HashMap<>();
fResultClassNameToExtension= new HashMap<>();
fExtensions= Platform.getExtensionRegistry().getConfigurationElementsFor(ID_EXTENSION_POINT);
for (IConfigurationElement fExtension : fExtensions) {
fResultClassNameToExtension.put(fExtension.getAttribute(ATTRIB_SEARCH_RESULT_CLASS), fExtension);
}
}
public ISearchResultPage findPageForSearchResult(ISearchResult result, boolean create) {
Class<? extends ISearchResult> resultClass= result.getClass();
IConfigurationElement configElement= findConfigurationElement(resultClass);
if (configElement != null) {
return getSearchResultPage(configElement, create);
}
return null;
}
public ISearchResultPage findPageForPageId(String pageId, boolean create) {
IConfigurationElement configElement= findConfigurationElement(pageId);
if (configElement != null) {
return getSearchResultPage(configElement, create);
}
return null;
}
public String findLabelForPageId(String pageId) {
IConfigurationElement configElement= findConfigurationElement(pageId);
if (configElement != null) {
return configElement.getAttribute(ATTRIB_LABEL);
}
return null;
}
public String getHelpContextId(String pageId) {
IConfigurationElement configElement= findConfigurationElement(pageId);
if (configElement != null) {
return configElement.getAttribute(ATTRIB_HELP_CONTEXT);
}
return null;
}
private ISearchResultPage getSearchResultPage(final IConfigurationElement configElement, boolean create) {
ISearchResultPage instance= fExtensionToInstance.get(configElement);
if (instance == null && create) {
final Object[] result= new Object[1];
ISafeRunnable safeRunnable= new SafeRunnable(SearchMessages.SearchPageRegistry_error_creating_extensionpoint) {
@Override
public void run() throws Exception {
result[0]= configElement.createExecutableExtension("class"); //$NON-NLS-1$
}
@Override
public void handleException(Throwable e) {
// invalid contribution
SearchPlugin.log(e);
}
};
SafeRunner.run(safeRunnable);
if (result[0] instanceof ISearchResultPage) {
instance= (ISearchResultPage) result[0];
instance.setID(configElement.getAttribute(ATTRIB_ID));
fExtensionToInstance.put(configElement, instance);
}
}
return instance;
}
private IConfigurationElement findConfigurationElement(String pageId) {
for (IConfigurationElement curr : fExtensions) {
if (pageId.equals(curr.getAttribute(ATTRIB_ID))) {
return curr;
}
}
return null;
}
private IConfigurationElement findConfigurationElement(Class<?> resultClass) {
String className= resultClass.getName();
IConfigurationElement configElement= fResultClassNameToExtension.get(className);
if (configElement != null) {
return configElement;
}
Class<?> superclass= resultClass.getSuperclass();
if (superclass != null) {
IConfigurationElement foundExtension= findConfigurationElement(superclass);
if (foundExtension != null) {
fResultClassNameToExtension.put(className, configElement);
return foundExtension;
}
}
Class<?>[] interfaces= resultClass.getInterfaces();
for (Class<?> interface1 : interfaces) {
IConfigurationElement foundExtension= findConfigurationElement(interface1);
if (foundExtension != null) {
fResultClassNameToExtension.put(className, configElement);
return foundExtension;
}
}
return null;
}
}
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