/*
 * Copyright 2000-2002,2004,2005 The Apache Software Foundation.
 * 
 * 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.sun.org.apache.xerces.internal.jaxp;

import java.util.Hashtable;

import javax.xml.XMLConstants;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import javax.xml.validation.Schema;

import org.xml.sax.SAXException;
import org.xml.sax.SAXNotRecognizedException;
import org.xml.sax.SAXNotSupportedException;

import com.sun.org.apache.xerces.internal.impl.Constants;

/**
 * This is the implementation specific class for the
 * <code>javax.xml.parsers.SAXParserFactory</code>. This is the platform
 * default implementation for the platform.
 * 
 * @author Rajiv Mordani
 * @author Edwin Goei
 * 
 * @version $Id: SAXParserFactoryImpl.java,v 1.6 2007/07/19 04:38:52 ofung Exp $
 */
public class SAXParserFactoryImpl extends SAXParserFactory {
    
    /** Feature identifier: validation. */
    private static final String VALIDATION_FEATURE =
        Constants.SAX_FEATURE_PREFIX + Constants.VALIDATION_FEATURE;
    
    /** Feature identifier: namespaces. */
    private static final String NAMESPACES_FEATURE =
        Constants.SAX_FEATURE_PREFIX + Constants.NAMESPACES_FEATURE;
    
    /** Feature identifier: XInclude processing */
    private static final String XINCLUDE_FEATURE = 
        Constants.XERCES_FEATURE_PREFIX + Constants.XINCLUDE_FEATURE;
    
    private Hashtable features;
    private Schema grammar;
    private boolean isXIncludeAware;
    
    /**
     * State of the secure processing feature, initially <code>false</code>
     */
    private boolean fSecureProcess = true;

    /**
     * Creates a new instance of <code>SAXParser</code> using the currently
     * configured factory parameters.
     * @return javax.xml.parsers.SAXParser
     */
    public SAXParser newSAXParser()
        throws ParserConfigurationException
    {
        SAXParser saxParserImpl;
        try {
            saxParserImpl = new SAXParserImpl(this, features, fSecureProcess);
        } catch (SAXException se) {
            // Translate to ParserConfigurationException
            throw new ParserConfigurationException(se.getMessage());
        }
	return saxParserImpl;
    }

    /**
     * Common code for translating exceptions
     */
    private SAXParserImpl newSAXParserImpl()
        throws ParserConfigurationException, SAXNotRecognizedException, 
        SAXNotSupportedException
    {
        SAXParserImpl saxParserImpl;
        try {
            saxParserImpl = new SAXParserImpl(this, features);
        } catch (SAXNotSupportedException e) {
            throw e;
        } catch (SAXNotRecognizedException e) {
            throw e;
        } catch (SAXException se) {
            throw new ParserConfigurationException(se.getMessage());
        }
        return saxParserImpl;
    }

    /**
     * Sets the particular feature in the underlying implementation of 
     * org.xml.sax.XMLReader.
     */
    public void setFeature(String name, boolean value)
        throws ParserConfigurationException, SAXNotRecognizedException, 
		SAXNotSupportedException {
        if (name == null) {
            throw new NullPointerException();
        }
        // If this is the secure processing feature, save it then return.
        if (name.equals(XMLConstants.FEATURE_SECURE_PROCESSING)) {
            fSecureProcess = value;
            return;
        }
        
        // XXX This is ugly.  We have to collect the features and then
        // later create an XMLReader to verify the features.
        putInFeatures(name, value);
        // Test the feature by possibly throwing SAX exceptions
        try {
            newSAXParserImpl();
        } catch (SAXNotSupportedException e) {
            features.remove(name);
            throw e;
        } catch (SAXNotRecognizedException e) {
            features.remove(name);
            throw e;
        }
    }

    /**
     * returns the particular property requested for in the underlying 
     * implementation of org.xml.sax.XMLReader.
     */
    public boolean getFeature(String name)
        throws ParserConfigurationException, SAXNotRecognizedException,
		SAXNotSupportedException {
        if (name == null) {
            throw new NullPointerException();
        }
        if (name.equals(XMLConstants.FEATURE_SECURE_PROCESSING)) {
            return fSecureProcess;
        }
        // Check for valid name by creating a dummy XMLReader to get
        // feature value
        return newSAXParserImpl().getXMLReader().getFeature(name);
    }
    
    public Schema getSchema() {
        return grammar;
    }

    public void setSchema(Schema grammar) {
        this.grammar = grammar;
    }

    public boolean isXIncludeAware() {
        return getFromFeatures(XINCLUDE_FEATURE);
    }

    public void setXIncludeAware(boolean state) {
        putInFeatures(XINCLUDE_FEATURE, state);
    }
    
    
    public void setValidating(boolean validating) {
        putInFeatures(VALIDATION_FEATURE, validating);
    }
    
    public boolean isValidating() {
         return getFromFeatures(VALIDATION_FEATURE);
    }
     
    private void putInFeatures(String name, boolean value){
         if (features == null) {
            features = new Hashtable();
        }
        features.put(name, value ? Boolean.TRUE : Boolean.FALSE);
    }
     
    private boolean getFromFeatures(String name){
         if (features == null){
            return false;
         }
         else {
             Object value = features.get(name);
             return (value == null) ? false : Boolean.valueOf(value.toString()).booleanValue();
         }
    }
   
    public boolean isNamespaceAware() {
        return getFromFeatures(NAMESPACES_FEATURE);
    }
     
    public void setNamespaceAware(boolean awareness) {
       putInFeatures(NAMESPACES_FEATURE, awareness);
    }

 }
