/*******************************************************************************
 * Copyright (c) 2005, 2011 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:
 *    Andrew Niefer (IBM) - Initial API and implementation
 *    Markus Schorn (Wind River Systems)
 *******************************************************************************/
package org.eclipse.cdt.internal.core.dom.parser.cpp;

import org.eclipse.cdt.core.dom.ast.ASTTypeUtil;
import org.eclipse.cdt.core.dom.ast.IBinding;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPClassType;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPFunction;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPFunctionTemplate;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPTemplateArgument;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPTemplateInstance;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPTemplateParameter;
import org.eclipse.cdt.core.dom.ast.cpp.ICPPTemplateParameterMap;
import org.eclipse.cdt.core.parser.util.ObjectMap;

/**
 * The specialization of a friend function template in the context of a class specialization.
 */
public class CPPFunctionTemplateSpecialization extends CPPFunctionSpecialization
		implements ICPPFunctionTemplate, ICPPInternalTemplate {

	private ObjectMap instances = null;
	
	public CPPFunctionTemplateSpecialization(ICPPFunction original, ICPPClassType owner, ICPPTemplateParameterMap argumentMap) {
		super(original, owner, argumentMap);
	}

	@Override
	public ICPPTemplateParameter[] getTemplateParameters() {
		ICPPFunctionTemplate template = (ICPPFunctionTemplate) getSpecializedBinding();
		return template.getTemplateParameters();
	}

	@Override
	public synchronized final void addInstance(ICPPTemplateArgument[] arguments, ICPPTemplateInstance instance) {
		if (instances == null)
			instances = new ObjectMap(2);
		String key= ASTTypeUtil.getArgumentListString(arguments, true);
		instances.put(key, instance);
	}

	@Override
	public synchronized final ICPPTemplateInstance getInstance(ICPPTemplateArgument[] arguments) {
		if (instances != null) {
			String key= ASTTypeUtil.getArgumentListString(arguments, true);
			return (ICPPTemplateInstance) instances.get(key);
		}
		return null;
	}
	
	@Override
	public synchronized ICPPTemplateInstance[] getAllInstances() {
		if (instances != null) {
			ICPPTemplateInstance[] result= new ICPPTemplateInstance[instances.size()];
			for (int i=0; i < instances.size(); i++) {
				result[i]= (ICPPTemplateInstance) instances.getAt(i);
			}
			return result;
		}
		return ICPPTemplateInstance.EMPTY_TEMPLATE_INSTANCE_ARRAY;
	}
	
	@Override
	public IBinding resolveTemplateParameter(ICPPTemplateParameter param) {
		return param;
	}
}
