android/src/com/android/tools/idea/templates/FmCompareVersionsMethod.java

/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
 *
 * 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.tools.idea.templates;

import com.android.sdklib.repository.FullRevision;
import freemarker.template.*;

import java.util.List;

/**
 * Method invoked by FreeMarker to compare two version strings.
 */
public class FmCompareVersionsMethod implements TemplateMethodModelEx {

    @Override
    public TemplateModel exec(List args) throws TemplateModelException {
        if (args.size() != 2) {
            throw new TemplateModelException("Wrong arguments");
        }

        FullRevision lhs = FullRevision.parseRevision(args.get(0).toString());
        FullRevision rhs = FullRevision.parseRevision(args.get(1).toString());

        return new SimpleNumber(lhs.compareTo(rhs));
    }
}