org.eclipse.help/Eclipse Help/org/eclipse/help/internal/contributors/xml/ContributorFactory.java

package org.eclipse.help.internal.contributors.xml;

/*
 * Licensed Materials - Property of IBM,
 * WebSphere Studio Workbench
 * (c) Copyright IBM Corp 2000
 */

import java.util.*;
import org.eclipse.core.runtime.*;
import org.eclipse.help.internal.contributors.*;

/**
 * Contributor factory: 
 */
public class ContributorFactory {
	protected static final ContributorFactory instance = new ContributorFactory();

	protected Hashtable creators; // replace with HashMap later
	/**
	 * ContributorFactory constructor.
	 */
	protected ContributorFactory() {
		super();

		creators = new Hashtable();
		creators.put(TopicContributor.TOPICS_ELEM, new XMLTopicContributorCreator());
		creators.put(ViewContributor.INFOSET_ELEM, new XMLViewContributorCreator());
		creators.put(ActionContributor.ACTIONS_ELEM, new XMLActionContributorCreator());
		creators.put(
			ContextContributor.CONTEXTS_ELEM,
			new XMLContextContributorCreator());
	}
	/**
	 * @param id java.lang.String
	 * @param creator com.ibm.itp.ua.contribution.ContributorCreator
	 */
	public void addContributorCreator(String id, ContributorCreator creator) {
		creators.put(id, creator);
	}
	/**
	 * @return com.ibm.itp.ua.contribution.Contributor
	 * @param type java.lang.String
	 */
	public Contributor createContributor(
		IPluginDescriptor plugin,
		IConfigurationElement contribution) {
		ContributorCreator creator =
			(ContributorCreator) creators.get(contribution.getName());

		if ((creator == null) || (plugin == null) || (contribution == null)) {
			// unknown contribution type, or invalid plugin or contribution
			// returning null is properly handled by calling class.
			return null;
		} else {
			return creator.create(plugin, contribution);
		}
	}
	/**
	 * @return java.lang.String[]
	 */
	public String[] getContributorTypes() {
		Vector tmpTypes = new Vector();
		Enumeration e = creators.keys();

		while (e.hasMoreElements()) {
			tmpTypes.addElement((String) e.nextElement());
		}

		String[] types = new String[tmpTypes.size()];
		tmpTypes.copyInto(types);

		return types;
	}
	/**
	 * @return com.ibm.itp.help.contribution.ContributorFactory
	 */
	public static ContributorFactory getFactory() {
		return instance;
	}
}