/*************************GO-LICENSE-START*********************************
 * Copyright 2014 ThoughtWorks, Inc.
 *
 * 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.
 *************************GO-LICENSE-END***********************************/

package com.thoughtworks.go.config;

import java.net.URL;

import com.thoughtworks.go.util.GoConstants;

import static com.thoughtworks.go.util.ExceptionUtils.bomb;

public class GoConfigSchema {

    public static URL getCurrentSchema() {
        return getResource(currentSchemaVersion());
    }

    public static URL getResource(int version) {
        String schema = resolveSchemaFile(version);
        URL resource = GoConfigSchema.class.getResource(schema);
        if (resource == null) {
            throw bomb("Unable to find resource for " + schema);
        }
        return resource;
    }

    public static int currentSchemaVersion() {
        return GoConstants.CONFIG_SCHEMA_VERSION;
    }

    static String resolveSchemaFile(int version) {
        if (version == currentSchemaVersion()) {
            return "/cruise-config.xsd";
        } else {
            return "/schemas/" + version + "_cruise-config.xsd";
        }
    }
}