org.apache.hadoop.gateway.descriptor.xml.XmlGatewayDescriptorImporter.java Source code

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Here is the source code for org.apache.hadoop.gateway.descriptor.xml.XmlGatewayDescriptorImporter.java

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/**
 * 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.hadoop.gateway.descriptor.xml;

import org.apache.commons.digester3.Digester;
import org.apache.commons.digester3.ExtendedBaseRules;
import org.apache.commons.digester3.binder.DigesterLoader;
import org.apache.hadoop.gateway.descriptor.GatewayDescriptor;
import org.apache.hadoop.gateway.descriptor.GatewayDescriptorImporter;
import org.xml.sax.SAXException;

import java.io.IOException;
import java.io.Reader;

import static org.apache.commons.digester3.binder.DigesterLoader.newLoader;

public class XmlGatewayDescriptorImporter implements GatewayDescriptorImporter {

    private static DigesterLoader loader = newLoader(new XmlGatewayDescriptorRules());

    @Override
    public String getFormat() {
        return "xml";
    }

    @Override
    public GatewayDescriptor load(Reader reader) throws IOException {
        Digester digester = loader.newDigester(new ExtendedBaseRules());
        digester.setValidating(false);
        try {
            GatewayDescriptor descriptor = digester.parse(reader);
            return descriptor;
        } catch (SAXException e) {
            throw new IOException(e);
        }
    }
}