/*
 *                 Sun Public License Notice
 * 
 * The contents of this file are subject to the Sun Public License
 * Version 1.0 (the "License"). You may not use this file except in
 * compliance with the License. A copy of the License is available at
 * http://www.sun.com/
 * 
 * The Original Code is NetBeans. The Initial Developer of the Original
 * Code is Sun Microsystems, Inc. Portions Copyright 1997-2002 Sun
 * Microsystems, Inc. All Rights Reserved.
 */
package org.netbeans.modules.xml.catalog.impl.oasis;

import java.util.*;

import org.xml.sax.*;

/**
 * Partial implementation of OASIS catalog.
 *
 * @author  Petr Kuzel
 * @version generated by FFJ XML module
 */
class CatalogHandlerImpl implements CatalogHandler {
    
    private static final String XML_BASE_ATT = "xml:base"; // NOI18N
    private static final String CATALOG_ATT = "catalog"; // NOI18N
    private static final String PUBLIC_ID_ATT = "publicId"; // NOI18N
    private static final String URI_ATT = "uri"; // NOI18N
    private static final String SYSTEM_ID_ATT = "systemId"; // NOI18N
    private static final String PREFER_ATT = "prefer"; // NOI18N
    private static final String NAME_ATT = "name"; // NOI18N
    
    private Stack groups = new Stack();
    
    private Catalog target;
    
    public CatalogHandlerImpl(Catalog target) {
        this.target = target;
    }
    
    public void handle_system(final AttributeList meta) throws SAXException {
        if ( Util.THIS.isLoggable() ) /* then */ Util.THIS.debug ("handle_system: " + meta); // NOI18N
        
        String systemId = meta.getValue(SYSTEM_ID_ATT);
        String uri = meta.getValue(URI_ATT);

        target.addSystemMapping(systemId, resolve(uri));
    }
    
    public void handle_uri(final AttributeList meta) throws SAXException {
        if ( Util.THIS.isLoggable() ) /* then */ Util.THIS.debug ("handle_uri: " + meta); // NOI18N
        
        String name = meta.getValue(NAME_ATT);
        String uri = meta.getValue(URI_ATT);

        //!!!
    }
    
    public void handle_public(final AttributeList meta) throws SAXException {
        if ( Util.THIS.isLoggable() ) /* then */ Util.THIS.debug ("handle_public: " + meta); // NOI18N
        
        String publicId = meta.getValue(PUBLIC_ID_ATT);
        String uri = meta.getValue(URI_ATT);
        
        target.addPublicMapping(publicId, resolve(uri));
    }
    
    public void handle_rewriteSystem(final AttributeList meta) throws SAXException {
        if ( Util.THIS.isLoggable() ) /* then */ Util.THIS.debug ("handle_rewriteSystem: " + meta); // NOI18N
    }
    
    public void handle_delegateSystem(final AttributeList meta) throws SAXException {
        if ( Util.THIS.isLoggable() ) /* then */ Util.THIS.debug ("handle_delegateSystem: " + meta); // NOI18N
    }
    
    public void start_catalog(final AttributeList meta) throws SAXException {
        if ( Util.THIS.isLoggable() ) /* then */ Util.THIS.debug ("start_catalog: " + meta); // NOI18N
        
        String base = meta.getValue(XML_BASE_ATT);
        String prefer = meta.getValue(PREFER_ATT);
        
        groups.push(new Group(base, "public".equals(prefer))); // NOI18N
    }
    
    public void end_catalog() throws SAXException {
        if ( Util.THIS.isLoggable() ) /* then */ Util.THIS.debug ("end_catalog()"); // NOI18N
        
        groups.pop();
    }
    
    public void handle_rewriteURI(final AttributeList meta) throws SAXException {
        if ( Util.THIS.isLoggable() ) /* then */ Util.THIS.debug ("handle_rewriteURI: " + meta); // NOI18N
    }
    
    public void handle_delegatePublic(final AttributeList meta) throws SAXException {
        if ( Util.THIS.isLoggable() ) /* then */ Util.THIS.debug ("handle_delegatePublic: " + meta); // NOI18N
    }
    
    public void handle_nextCatalog(final AttributeList meta) throws SAXException {
        if ( Util.THIS.isLoggable() ) /* then */ Util.THIS.debug ("handle_nextCatalog: " + meta); // NOI18N
    }
    
    public void start_group(final AttributeList meta) throws SAXException {
        if ( Util.THIS.isLoggable() ) /* then */ Util.THIS.debug ("start_group: " + meta); // NOI18N
        
        String base = meta.getValue(XML_BASE_ATT);
        String prefer = meta.getValue(PREFER_ATT);
        
        groups.push(new Group(base, "public".equals(prefer))); // NOI18N
    }
    
    public void end_group() throws SAXException {
        if ( Util.THIS.isLoggable() ) /* then */ Util.THIS.debug ("end_group()"); // NOI18N

        groups.pop();
    }
    
    public void handle_delegateURI(final AttributeList meta) throws SAXException {
        if ( Util.THIS.isLoggable() ) /* then */ Util.THIS.debug ("handle_delegateURI: " + meta); // NOI18N
    }

    /*
     * Conver local URIs according to current base
     */
    private String resolve(String uri) {
        if (uri == null) return null;        
        if (currentBase() == null) return uri;
        
        return uri;  //!!! not implemented
    }
    
    private String currentBase() {
        return ((Group)groups.peek()).base;
    }

    private boolean currentPreference() {
        return ((Group)groups.peek()).prefer;
    }
    
    private class Group {
        String base;
        boolean prefer;
        
        Group(String base, boolean prefer) {
            this.base = base;
            this.prefer = prefer;
        }
    }
}