com.ocpsoft.pretty.faces.config.spi.DefaultXMLConfigurationProvider.java Source code

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Here is the source code for com.ocpsoft.pretty.faces.config.spi.DefaultXMLConfigurationProvider.java

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/*
 * Copyright 2010 Lincoln Baxter, III
 * 
 * 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.
 */

package com.ocpsoft.pretty.faces.config.spi;

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

import javax.servlet.ServletContext;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import com.ocpsoft.pretty.PrettyException;
import com.ocpsoft.pretty.faces.config.DigesterPrettyConfigParser;
import com.ocpsoft.pretty.faces.config.PrettyConfig;
import com.ocpsoft.pretty.faces.config.PrettyConfigBuilder;
import com.ocpsoft.pretty.faces.config.PrettyConfigParser;
import com.ocpsoft.pretty.faces.spi.ConfigurationProvider;

/**
 * @author <a href="mailto:lincolnbaxter@gmail.com">Lincoln Baxter, III</a>
 * 
 */
public class DefaultXMLConfigurationProvider implements ConfigurationProvider {
    private static final Log log = LogFactory.getLog(DefaultXMLConfigurationProvider.class);

    public static final String DEFAULT_PRETTY_FACES_CONFIG = "/WEB-INF/pretty-config.xml";

    public PrettyConfig loadConfiguration(ServletContext servletContext) {
        final PrettyConfigBuilder builder = new PrettyConfigBuilder();
        PrettyConfigParser configParser = new DigesterPrettyConfigParser();
        final InputStream is = servletContext.getResourceAsStream(DEFAULT_PRETTY_FACES_CONFIG);
        if (is != null) {
            log.trace("Reading config [" + DEFAULT_PRETTY_FACES_CONFIG + "].");

            try {
                configParser.parse(builder, is);
            } catch (Exception e) {
                throw new PrettyException(
                        "Failed to parse PrettyFaces configuration from " + DEFAULT_PRETTY_FACES_CONFIG, e);
            } finally {
                try {
                    is.close();
                } catch (IOException ignored) {
                }
            }
        }

        return builder.build();
    }
}