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The Apache WSS4J project provides a Java implementation of the primary security standards for Web Services, namely the OASIS Web Services Security (WS-Security) specifications from the OASIS Web Services Security TC.

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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.ws.security.saml.ext;

import java.io.InputStream;

import org.opensaml.Configuration;
import org.opensaml.DefaultBootstrap;
import org.opensaml.xml.ConfigurationException;
import org.opensaml.xml.XMLConfigurator;

/**
 * This class intializes the Opensaml library. It is necessary to override DefaultBootstrap
 * to avoid instantiating Velocity, which we do not need in WSS4J.
 */
public class OpenSAMLBootstrap extends DefaultBootstrap {
    
    /** List of default XMLTooling configuration files. */
    private static String[] xmlToolingConfigs = { 
        "/default-config.xml", 
        "/schema-config.xml", 
        "/signature-config.xml",
        "/signature-validation-config.xml", 
        "/encryption-config.xml", 
        "/encryption-validation-config.xml",
        "/soap11-config.xml", 
        "/wsfed11-protocol-config.xml",
        "/saml1-assertion-config.xml", 
        "/saml1-protocol-config.xml",
        "/saml1-core-validation-config.xml", 
        "/saml2-assertion-config.xml", 
        "/saml2-protocol-config.xml",
        "/saml2-core-validation-config.xml", 
        "/saml1-metadata-config.xml", 
        "/saml2-metadata-config.xml",
        "/saml2-metadata-validation-config.xml", 
        "/saml2-metadata-attr-config.xml",
        "/saml2-metadata-idp-discovery-config.xml",
        "/saml2-metadata-ui-config.xml",
        "/saml2-protocol-thirdparty-config.xml",
        "/saml2-metadata-query-config.xml", 
        "/saml2-assertion-delegation-restriction-config.xml",    
        "/saml2-ecp-config.xml",
        "/saml2-xacml2-profile.xml",
        "/xacml10-saml2-profile-config.xml",
        "/xacml11-saml2-profile-config.xml",
        "/xacml20-context-config.xml",
        "/xacml20-policy-config.xml",
        "/xacml2-saml2-profile-config.xml",
        "/xacml3-saml2-profile-config.xml",    
        "/wsaddressing-config.xml",
        "/wssecurity-config.xml",
    };
    
    /**
     * Initializes the OpenSAML library, loading default configurations.
     * 
     * @throws ConfigurationException thrown if there is a problem initializing the OpenSAML library
     */
    public static synchronized void bootstrap() throws ConfigurationException {
        initializeXMLSecurity();

        initializeXMLTooling(xmlToolingConfigs);

        initializeArtifactBuilderFactories();

        initializeGlobalSecurityConfiguration();
        
        initializeParserPool();
    }

    
    protected static void initializeXMLTooling(String[] providerConfigs) throws ConfigurationException {
        XMLConfigurator configurator = new XMLConfigurator();
        for (String config : providerConfigs) {
            //most are found in the Configuration.class classloader
            InputStream ins = Configuration.class.getResourceAsStream(config);
            if (ins == null) {
                //some are from us
                ins = OpenSAMLBootstrap.class.getResourceAsStream(config);
            }
            configurator.load(ins);
        }
    }
}