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/*******************************************************************************
* Copyright (c) 2009 Oracle Corporation.
* 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:
* Ian Trimble - initial API and implementation
*******************************************************************************/
package org.eclipse.jst.pagedesigner.dtresourceprovider;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.eclipse.jst.jsf.common.ui.internal.logging.Logger;
import org.eclipse.jst.pagedesigner.PDPlugin;
/**
* Used to Map a String ID to a List of Classes and provide convenient access.
*
* @author Ian Trimble - Oracle
*/
public class ProviderClassMap {
private Map<String, List<Class>> idToClassListMap;
private Logger log = PDPlugin.getLogger(ProviderClassMap.class);
/**
* Creates an instance.
*/
public ProviderClassMap() {
idToClassListMap = new HashMap<String, List<Class>>();
}
/**
* Gets the List of Classes associated with the specified ID.
*
* @param id ID for which to get the List.
* @return The List of Classes associated with the specified ID. List may be
* empty but will not be null.
*/
public List<Class> get(String id) {
List<Class> classList = idToClassListMap.get(id);
if (classList == null) {
classList = new ArrayList<Class>();
idToClassListMap.put(id, classList);
}
return classList;
}
/**
* Adds the specified Class to the List associated with the specified ID.
*
* @param id ID for which to associate the specified Class.
* @param clazz Class to add to the List associated with the specified ID.
* @return true (as per the general contract of the Collection.add method).
*/
public boolean add(String id, Class clazz) {
List<Class> classList = get(id);
return classList.add(clazz);
}
/**
* Instantiates all classes associated with the specified ID and returns a
* List of IDTResourceProvider instances.
*
* @param id ID for which to instantiate all Classes.
* @return a List of IDTResourceProvider instances associated with the
* specified ID. List may be empty but will not be null.
*/
public List<IDTResourceProvider> createInstances(String id) {
List<IDTResourceProvider> providers = new ArrayList<IDTResourceProvider>();
List<Class> classList = get(id);
for (Class providerClass: classList) {
try {
Object objProvider = providerClass.newInstance();
if (objProvider instanceof IDTResourceProvider) {
providers.add((IDTResourceProvider)objProvider);
} else {
log.error("Warning.ProviderClassMap.NotIDTResourceProvider", providerClass.getName()); //$NON-NLS-1$
}
} catch(IllegalAccessException iae) {
log.error("Warning.ProviderClassMap.IllegalAccess", providerClass.getName(), id, iae); //$NON-NLS-1$
} catch(InstantiationException ie) {
log.error("Warning.ProviderClassMap.Instantiation", providerClass.getName(), id, ie); //$NON-NLS-1$
}
}
return providers;
}
/**
* Instantiates all registered IDTResourceProviders and returns as a List.
*
* @return List of all registered IDTResourceProviders. List may be empty
* but will not be null.
*/
public List<IDTResourceProvider> createInstances() {
List<IDTResourceProvider> providers = new ArrayList<IDTResourceProvider>();
Set<String> idSet = idToClassListMap.keySet();
for (String curId: idSet) {
List<IDTResourceProvider> providersForCurId = createInstances(curId);
providers.addAll(providersForCurId);
}
return providers;
}
}
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