extensions/src/main/java/org/apache/falcon/extensions/ExtensionFactory.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.falcon.extensions;

import org.apache.commons.lang3.StringUtils;
import org.apache.falcon.FalconException;

import java.util.List;

/**
 * Extension Factory class to get the corresponding extension.
 */
public final class ExtensionFactory {

    private ExtensionFactory() {
    }

    public static AbstractExtension getExtensionType(final String extensionName) throws FalconException {
        if (StringUtils.isBlank(extensionName)) {
            return null;
        }

        List<AbstractExtension> extensions = AbstractExtension.getExtensions();

        for (AbstractExtension extension : extensions) {
            if (extensionName.equalsIgnoreCase(extension.getName())) {
                return extension;
            }
        }
        return null;
    }
}