org.apache.torque.generator.configuration.controller.ControlConfigurationXmlParser.java Source code

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Here is the source code for org.apache.torque.generator.configuration.controller.ControlConfigurationXmlParser.java

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package org.apache.torque.generator.configuration.controller;

/*
 * 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.
 */

import java.io.IOException;
import java.io.InputStream;

import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.torque.generator.configuration.ConfigurationException;
import org.apache.torque.generator.configuration.ConfigurationHandlers;
import org.apache.torque.generator.configuration.ConfigurationProvider;
import org.apache.torque.generator.configuration.paths.ProjectPaths;
import org.xml.sax.InputSource;
import org.xml.sax.SAXNotRecognizedException;
import org.xml.sax.SAXNotSupportedException;
import org.xml.sax.SAXParseException;

/**
 * Parses the xml file which provides the control configuration.
 */
public class ControlConfigurationXmlParser {
    /**
     * The SaxParserFactory to create the SAX parsers for reading in the
     * configuration files.
     */
    private static SAXParserFactory saxFactory;

    /** The logger. */
    private static Log log = LogFactory.getLog(ControlConfigurationXmlParser.class);

    static {
        saxFactory = SAXParserFactory.newInstance();
        saxFactory.setNamespaceAware(true);
        try {
            saxFactory.setFeature("http://xml.org/sax/features/validation", true);
            saxFactory.setFeature("http://apache.org/xml/features/validation/schema", true);
        } catch (SAXNotSupportedException e) {
            throw new RuntimeException(e);
        } catch (SAXNotRecognizedException e) {
            throw new RuntimeException(e);
        } catch (ParserConfigurationException e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * Reads the controller configuration out of a configurationProvider.
     *
     * @param configurationProvider the object for accessing the configuration,
     *        not null.
     * @param projectPaths the paths inside the configuration, not null.
     * @param configurationHandlers the available configuration handlers,
     *        not null.
     *
     * @return the Controller configuration.
        
     * @throws ConfigurationException if an error in the configuration
     *         is encountered.
     * @throws NullPointerException if an argument is null.
     */
    public ControlConfiguration readControllerConfiguration(ConfigurationProvider configurationProvider,
            ProjectPaths projectPaths, ConfigurationHandlers configurationHandlers) throws ConfigurationException {
        InputStream controlConfigurationInputStream = configurationProvider.getControlConfigurationInputStream();
        try {
            ControlConfiguration result = new ControlConfiguration();
            try {
                SAXParser parser = saxFactory.newSAXParser();
                InputSource is = new InputSource(controlConfigurationInputStream);
                parser.parse(is, new ControlConfigurationSaxHandler(result, configurationProvider, projectPaths,
                        configurationHandlers));
            } catch (SAXParseException e) {
                throw new ConfigurationException("Error parsing controller Configuration "
                        + configurationProvider.getControlConfigurationLocation() + " at line " + e.getLineNumber()
                        + " column " + e.getColumnNumber() + " : " + e.getMessage(), e);

            } catch (Exception e) {
                throw new ConfigurationException("Error parsing controller Configuration "
                        + configurationProvider.getControlConfigurationLocation() + e.getMessage(), e);
            }
            return result;
        } finally {
            try {
                controlConfigurationInputStream.close();
            } catch (IOException e) {
                log.warn("Could not close controlConfigurationInputStream", e);
            }
        }
    }
}