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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.parsers;

import org.apache.xerces.impl.Constants;
import org.apache.xerces.util.SymbolTable;
import org.apache.xerces.xinclude.XIncludeHandler;
import org.apache.xerces.xinclude.XIncludeNamespaceSupport;
import org.apache.xerces.xni.XMLDocumentHandler;
import org.apache.xerces.xni.grammars.XMLGrammarPool;
import org.apache.xerces.xni.parser.XMLComponentManager;
import org.apache.xerces.xni.parser.XMLConfigurationException;
import org.apache.xerces.xni.parser.XMLDocumentSource;

/**
 * This parser configuration includes an XIncludeHandler in the pipeline
 * before the schema validator, or as the last component in the pipeline if there is
 * no schema validator.  Using this pipeline will enable processing according to the
 * XML Inclusions specification, to the conformance level described in
 * XIncludeHandler.
 * 
 * @author Peter McCracken, IBM
 * @see org.apache.xerces.xinclude.XIncludeHandler
 */
public class XIncludeParserConfiguration extends XML11Configuration {

    private XIncludeHandler fXIncludeHandler;

    /** Feature identifier: allow notation and unparsed entity events to be sent out of order. */
    protected static final String ALLOW_UE_AND_NOTATION_EVENTS =
        Constants.SAX_FEATURE_PREFIX + Constants.ALLOW_DTD_EVENTS_AFTER_ENDDTD_FEATURE;
    
    /** Feature identifier: fixup base URIs. */
    protected static final String XINCLUDE_FIXUP_BASE_URIS =
        Constants.XERCES_FEATURE_PREFIX + Constants.XINCLUDE_FIXUP_BASE_URIS_FEATURE;
    
    /** Feature identifier: fixup language. */
    protected static final String XINCLUDE_FIXUP_LANGUAGE =
        Constants.XERCES_FEATURE_PREFIX + Constants.XINCLUDE_FIXUP_LANGUAGE_FEATURE;

    /** Property identifier: error reporter. */
    protected static final String XINCLUDE_HANDLER =
        Constants.XERCES_PROPERTY_PREFIX + Constants.XINCLUDE_HANDLER_PROPERTY;

    /** Property identifier: error reporter. */
    protected static final String NAMESPACE_CONTEXT =
        Constants.XERCES_PROPERTY_PREFIX + Constants.NAMESPACE_CONTEXT_PROPERTY;

    /** Default constructor. */
    public XIncludeParserConfiguration() {
        this(null, null, null);
    } // ()

    /** 
     * Constructs a parser configuration using the specified symbol table. 
     *
     * @param symbolTable The symbol table to use.
     */
    public XIncludeParserConfiguration(SymbolTable symbolTable) {
        this(symbolTable, null, null);
    } // (SymbolTable)

    /**
     * Constructs a parser configuration using the specified symbol table and
     * grammar pool.
     * 
     *
     * @param symbolTable The symbol table to use.
     * @param grammarPool The grammar pool to use.
     */
    public XIncludeParserConfiguration(
        SymbolTable symbolTable,
        XMLGrammarPool grammarPool) {
        this(symbolTable, grammarPool, null);
    } // (SymbolTable,XMLGrammarPool)

    /**
     * Constructs a parser configuration using the specified symbol table,
     * grammar pool, and parent settings.
     * 
     *
     * @param symbolTable    The symbol table to use.
     * @param grammarPool    The grammar pool to use.
     * @param parentSettings The parent settings.
     */
    public XIncludeParserConfiguration(
        SymbolTable symbolTable,
        XMLGrammarPool grammarPool,
        XMLComponentManager parentSettings) {
        super(symbolTable, grammarPool, parentSettings);

        fXIncludeHandler = new XIncludeHandler();
        addCommonComponent(fXIncludeHandler);
        
        final String[] recognizedFeatures = {
            ALLOW_UE_AND_NOTATION_EVENTS,
            XINCLUDE_FIXUP_BASE_URIS,
            XINCLUDE_FIXUP_LANGUAGE
        };
        addRecognizedFeatures(recognizedFeatures);

        // add default recognized properties
        final String[] recognizedProperties =
            { XINCLUDE_HANDLER, NAMESPACE_CONTEXT };
        addRecognizedProperties(recognizedProperties);
        
        setFeature(ALLOW_UE_AND_NOTATION_EVENTS, true);
        setFeature(XINCLUDE_FIXUP_BASE_URIS, true);
        setFeature(XINCLUDE_FIXUP_LANGUAGE, true);
        
        setProperty(XINCLUDE_HANDLER, fXIncludeHandler);
        setProperty(NAMESPACE_CONTEXT, new XIncludeNamespaceSupport());
    } // (SymbolTable,XMLGrammarPool)}
    
    
	/** Configures the pipeline. */
    protected void configurePipeline() {
        super.configurePipeline();

        //configure DTD pipeline
        fDTDScanner.setDTDHandler(fDTDProcessor);
        fDTDProcessor.setDTDSource(fDTDScanner);
        fDTDProcessor.setDTDHandler(fXIncludeHandler);
        fXIncludeHandler.setDTDSource(fDTDProcessor);
		fXIncludeHandler.setDTDHandler(fDTDHandler);
        if (fDTDHandler != null) {
            fDTDHandler.setDTDSource(fXIncludeHandler);
        }

        // configure XML document pipeline: insert after DTDValidator and 
        // before XML Schema validator
        XMLDocumentSource prev = null;
        if (fFeatures.get(XMLSCHEMA_VALIDATION) == Boolean.TRUE) {
            // we don't have to worry about fSchemaValidator being null, since
            // super.configurePipeline() instantiated it if the feature was set
            prev = fSchemaValidator.getDocumentSource();
        }
        // Otherwise, insert after the last component in the pipeline
        else {
            prev = fLastComponent;
            fLastComponent = fXIncludeHandler;
        }

        XMLDocumentHandler next = prev.getDocumentHandler();
		prev.setDocumentHandler(fXIncludeHandler);
		fXIncludeHandler.setDocumentSource(prev);
        if (next != null) {
            fXIncludeHandler.setDocumentHandler(next);
            next.setDocumentSource(fXIncludeHandler);
        }

    } // configurePipeline()

	protected void configureXML11Pipeline() {
		super.configureXML11Pipeline();
		
        // configure XML 1.1. DTD pipeline
		fXML11DTDScanner.setDTDHandler(fXML11DTDProcessor);
		fXML11DTDProcessor.setDTDSource(fXML11DTDScanner);
		fXML11DTDProcessor.setDTDHandler(fXIncludeHandler);
		fXIncludeHandler.setDTDSource(fXML11DTDProcessor);
		fXIncludeHandler.setDTDHandler(fDTDHandler);
		if (fDTDHandler != null) {
			fDTDHandler.setDTDSource(fXIncludeHandler);
		}
		
		// configure XML document pipeline: insert after DTDValidator and 
		// before XML Schema validator
		XMLDocumentSource prev = null;
		if (fFeatures.get(XMLSCHEMA_VALIDATION) == Boolean.TRUE) {
			// we don't have to worry about fSchemaValidator being null, since
			// super.configurePipeline() instantiated it if the feature was set
			prev = fSchemaValidator.getDocumentSource();
		}
		// Otherwise, insert after the last component in the pipeline
		else {
			prev = fLastComponent;
			fLastComponent = fXIncludeHandler;
		}

		XMLDocumentHandler next = prev.getDocumentHandler();
		prev.setDocumentHandler(fXIncludeHandler);
		fXIncludeHandler.setDocumentSource(prev);
		if (next != null) {
			fXIncludeHandler.setDocumentHandler(next);
			next.setDocumentSource(fXIncludeHandler);
		}

	} // configureXML11Pipeline()
    
    public void setProperty(String propertyId, Object value)
        throws XMLConfigurationException {

        if (propertyId.equals(XINCLUDE_HANDLER)) {
        }

        super.setProperty(propertyId, value);
    } // setProperty(String,Object)
}