/**
*
* 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.airavata.security.configurations;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import javax.xml.parsers.ParserConfigurationException;
import org.xml.sax.SAXException;

/**
 * Abstract implementation to read configurations.
 */
public abstract class AbstractConfigurationReader {

    public void init(String fileName) throws IOException, SAXException, ParserConfigurationException {

        File configurationFile = new File(fileName);

        if (!configurationFile.canRead()) {
            throw new IOException("Error reading configuration file " + configurationFile.getAbsolutePath());
        }

        FileInputStream streamIn = new FileInputStream(configurationFile);

        try {
            init(streamIn);
        } finally {
            streamIn.close();
        }
    }

    public abstract void init(InputStream inputStream) throws IOException, ParserConfigurationException, SAXException;
}
