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Xerces2 is the next generation of high performance, fully compliant XML parsers in the Apache Xerces family. This new version of Xerces introduces the Xerces Native Interface (XNI), a complete framework for building parser components and configurations that is extremely modular and easy to program. The Apache Xerces2 parser is the reference implementation of XNI but other parser components, configurations, and parsers can be written using the Xerces Native Interface. For complete design and implementation documents, refer to the XNI Manual. Xerces2 is a fully conforming XML Schema 1.0 processor. A partial experimental implementation of the XML Schema 1.1 Structures and Datatypes Working Drafts (December 2009) and an experimental implementation of the XML Schema Definition Language (XSD): Component Designators (SCD) Candidate Recommendation (January 2010) are provided for evaluation. For more information, refer to the XML Schema page. Xerces2 also provides a complete implementation of the Document Object Model Level 3 Core and Load/Save W3C Recommendations and provides a complete implementation of the XML Inclusions (XInclude) W3C Recommendation. It also provides support for OASIS XML Catalogs v1.1. Xerces2 is able to parse documents written according to the XML 1.1 Recommendation, except that it does not yet provide an option to enable normalization checking as described in section 2.13 of this specification. It also handles namespaces according to the XML Namespaces 1.1 Recommendation, and will correctly serialize XML 1.1 documents if the DOM level 3 load/save APIs are in use.

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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.xerces.jaxp;

import org.apache.xerces.impl.Constants;
import org.apache.xerces.impl.XMLErrorReporter;
import org.apache.xerces.impl.validation.ValidationManager;
import org.apache.xerces.impl.xs.XSMessageFormatter;
import org.apache.xerces.jaxp.validation.XSGrammarPoolContainer;
import org.apache.xerces.xni.grammars.XMLGrammarPool;
import org.apache.xerces.xni.parser.XMLComponentManager;
import org.apache.xerces.xni.parser.XMLConfigurationException;

/**
 * Parser configuration for Xerces' XMLSchemaValidator.
 * 
 * @version $Id: SchemaValidatorConfiguration.java 447237 2006-09-18 05:03:10Z mrglavas $
 */
final class SchemaValidatorConfiguration implements XMLComponentManager {
    
    // feature identifiers
    
    /** Feature identifier: schema validation. */
    private static final String SCHEMA_VALIDATION =
        Constants.XERCES_FEATURE_PREFIX + Constants.SCHEMA_VALIDATION_FEATURE;
    
    /** Feature identifier: validation. */
    private static final String VALIDATION =
        Constants.SAX_FEATURE_PREFIX + Constants.VALIDATION_FEATURE;
    
    /** Feature identifier: use grammar pool only. */
    private static final String USE_GRAMMAR_POOL_ONLY =
        Constants.XERCES_FEATURE_PREFIX + Constants.USE_GRAMMAR_POOL_ONLY_FEATURE;
    
    /** Feature identifier: parser settings. */
    private static final String PARSER_SETTINGS = 
        Constants.XERCES_FEATURE_PREFIX + Constants.PARSER_SETTINGS;
    
    // property identifiers
    
    /** Property identifier: error reporter. */
    private static final String ERROR_REPORTER =
        Constants.XERCES_PROPERTY_PREFIX + Constants.ERROR_REPORTER_PROPERTY;
    
    /** Property identifier: validation manager. */
    private static final String VALIDATION_MANAGER =
        Constants.XERCES_PROPERTY_PREFIX + Constants.VALIDATION_MANAGER_PROPERTY;
    
    /** Property identifier: grammar pool. */
    private static final String XMLGRAMMAR_POOL =
        Constants.XERCES_PROPERTY_PREFIX + Constants.XMLGRAMMAR_POOL_PROPERTY;
    
    //
    // Data
    //
    
    /** Parent component manager. **/
    private final XMLComponentManager fParentComponentManager;
    
    /** The Schema's grammar pool. **/
    private final XMLGrammarPool fGrammarPool;

    /** 
     * Tracks whether the validator should use components from 
     * the grammar pool to the exclusion of all others.
     */
    private final boolean fUseGrammarPoolOnly;
    
    /** Validation manager. */
    private final ValidationManager fValidationManager;
    
    public SchemaValidatorConfiguration(XMLComponentManager parentManager, 
            XSGrammarPoolContainer grammarContainer, ValidationManager validationManager) {
        fParentComponentManager = parentManager;
        fGrammarPool = grammarContainer.getGrammarPool();
        fUseGrammarPoolOnly = grammarContainer.isFullyComposed();
        fValidationManager = validationManager;
        // add schema message formatter to error reporter
        try {
            XMLErrorReporter errorReporter = (XMLErrorReporter) fParentComponentManager.getProperty(ERROR_REPORTER);
            if (errorReporter != null) {
                errorReporter.putMessageFormatter(XSMessageFormatter.SCHEMA_DOMAIN, new XSMessageFormatter());
            }
        }
        // Ignore exception.
        catch (XMLConfigurationException exc) {}
    }
    
    /**
     * Returns the state of a feature.
     * 
     * @param featureId The feature identifier.
     * @return true if the feature is supported
     * 
     * @throws XMLConfigurationException Thrown for configuration error.
     *                                   In general, components should
     *                                   only throw this exception if
     *                                   it is really
     *                                   a critical error.
     */
    public boolean getFeature(String featureId)
            throws XMLConfigurationException {
        if (PARSER_SETTINGS.equals(featureId)) {
            return fParentComponentManager.getFeature(featureId);
        }
        else if (VALIDATION.equals(featureId) || SCHEMA_VALIDATION.equals(featureId)) {
            return true;
        }
        else if (USE_GRAMMAR_POOL_ONLY.equals(featureId)) {
            return fUseGrammarPoolOnly;
        }
        return fParentComponentManager.getFeature(featureId);
    }

    /**
     * Returns the value of a property.
     * 
     * @param propertyId The property identifier.
     * @return the value of the property
     * 
     * @throws XMLConfigurationException Thrown for configuration error.
     *                                   In general, components should
     *                                   only throw this exception if
     *                                   it is really
     *                                   a critical error.
     */
    public Object getProperty(String propertyId)
            throws XMLConfigurationException {
        if (XMLGRAMMAR_POOL.equals(propertyId)) {
            return fGrammarPool;
        }
        else if (VALIDATION_MANAGER.equals(propertyId)) {
            return fValidationManager;
        }
        return fParentComponentManager.getProperty(propertyId);
    }
}