LinkResolver.java

/*******************************************************************************
 * Copyright (c) 2007, 2008 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.jdt.internal.corext.template.java;

import java.util.Iterator;
import java.util.List;

import org.eclipse.jface.text.templates.TemplateContext;
import org.eclipse.jface.text.templates.TemplateVariable;
import org.eclipse.jface.text.templates.TemplateVariableResolver;

/**
 * Resolver for the <code>link</code> variable. Resolves to a
 * first parameter puts the value into linked mode. Shows proposals
 * for each parameter.
 *
 * @since 3.4
 */
public class LinkResolver extends TemplateVariableResolver {

	private String[] fProposals;

	public LinkResolver(String type, String description) {
		super(type, description);
	}

	/**
	 * Default ctor for instantiation by the extension point.
	 */
	public LinkResolver() {
	}

	/* (non-Javadoc)
	 * @see org.eclipse.jface.text.templates.TemplateVariableResolver#resolve(org.eclipse.jface.text.templates.TemplateVariable, org.eclipse.jface.text.templates.TemplateContext)
	 */
	public void resolve(TemplateVariable variable, TemplateContext context) {

		variable.setUnambiguous(false);

		if (variable instanceof JavaVariable) {
			JavaContext jc= (JavaContext) context;
			JavaVariable jv= (JavaVariable) variable;

			List params= variable.getVariableType().getParams();
			if (params.size() > 0) {
				fProposals= new String[params.size()];
				int i= 0;
				for (Iterator iterator= params.iterator(); iterator.hasNext();) {
					String param= (String) iterator.next();
					fProposals[i]= param;
					i++;
				}
				jv.setChoices(fProposals);
				jv.setCurrentChoice(fProposals[0]);

				jc.markAsUsed(jv.getDefaultValue());
			} else {
				fProposals= new String[] { variable.getDefaultValue() };
				super.resolve(variable, context);
				return;
			}
		} else
			super.resolve(variable, context);
	}

	/* (non-Javadoc)
	 * @see org.eclipse.jface.text.templates.TemplateVariableResolver#resolveAll(org.eclipse.jface.text.templates.TemplateContext)
	 */
	protected String[] resolveAll(TemplateContext context) {
		return fProposals;
	}
}