/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * Licensed under the Eclipse Public License, Version 1.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.eclipse.org/org/documents/epl-v10.php
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.android.ide.eclipse.adt.internal.wizards.templates;

import com.android.utils.XmlUtils;

import freemarker.template.SimpleScalar;
import freemarker.template.TemplateMethodModel;
import freemarker.template.TemplateModel;
import freemarker.template.TemplateModelException;

import java.util.List;

/**
 * Method invoked by FreeMarker to escape a string such that it can be used
 * as an XML attribute (escaping ', ", & and <).
 */
public class FmEscapeXmlAttributeMethod implements TemplateMethodModel {
    @Override
    public TemplateModel exec(List args) throws TemplateModelException {
        if (args.size() != 1) {
            throw new TemplateModelException("Wrong arguments");
        }
        String string = args.get(0).toString();
        return new SimpleScalar(XmlUtils.toXmlAttributeValue(string));
    }
}