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/*
 * Copyright (c) 2001-2013 Oracle and/or its affiliates. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Oracle nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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 */

package com.sun.msv.relaxns.verifier;

import java.util.Iterator;
import java.util.Map;
import java.util.Set;

import org.iso_relax.dispatcher.AttributesDecl;
import org.iso_relax.dispatcher.AttributesVerifier;
import org.iso_relax.dispatcher.ElementDecl;
import org.iso_relax.dispatcher.IslandSchema;
import org.iso_relax.dispatcher.IslandVerifier;
import org.iso_relax.dispatcher.SchemaProvider;
import org.xml.sax.ErrorHandler;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;

import com.sun.msv.grammar.AttributeExp;
import com.sun.msv.grammar.ElementExp;
import com.sun.msv.grammar.Expression;
import com.sun.msv.grammar.ExpressionCloner;
import com.sun.msv.grammar.ExpressionPool;
import com.sun.msv.grammar.Grammar;
import com.sun.msv.grammar.OtherExp;
import com.sun.msv.grammar.ReferenceContainer;
import com.sun.msv.grammar.ReferenceExp;
import com.sun.msv.relaxns.grammar.DeclImpl;
import com.sun.msv.relaxns.grammar.ExternalAttributeExp;
import com.sun.msv.relaxns.grammar.ExternalElementExp;
import com.sun.msv.verifier.regexp.REDocumentDeclaration;

/**
 * base implementation of IslandSchema for MSV.
 * 
 * the iso_relax package doesn't have the distinction between AGM and VGM.
 * For the safety, the implementation of the createNewVerifier method creates
 * a new VGM everytime it is called.
 * 
 * Fortunately, when all island schemas are from MSV, the application can simply
 * treat RELAXGrammar as a normal Grammar object; there is no need to use
 * Dispatcher nor any divide-and-validate framework.
 * 
 * So createNewVerifier method is called only when
 * 
 *  
 *        MSV is used by other RELAX Namespace
 *        implementation or
 *  

 *        other IslandSchema implemntations are used by MSV's RELAXNSReader.
 * 
 * 
 * In that case, the current createNewVerifier method causes a performance problem.
 * 
 * @author Kohsuke KAWAGUCHI
 */
public abstract class IslandSchemaImpl
            implements IslandSchema, java.io.Serializable {
    
    /** map from name to DeclImpl. */
    protected final Map elementDecls = new java.util.HashMap();
    
    /** map from name to DeclImpl. */
    protected final Map attributesDecls = new java.util.HashMap();
    
    public IslandVerifier createNewVerifier( String namespace, ElementDecl[] rules ) {
        // see the class comment.
        // this method is invoked only under certain limited situations.
        DeclImpl[] ri = new DeclImpl[rules.length];
        System.arraycopy( rules,0, ri,0, rules.length );
        
        return new TREXIslandVerifier(
            new RulesAcceptor( 
                new REDocumentDeclaration( getGrammar() ), ri ) );
    }
    
    /** get the grammar object that represents this island. */
    protected abstract Grammar getGrammar();
    
    public ElementDecl getElementDeclByName( String name ) {
        return (ElementDecl)elementDecls.get(name);
    }
    
    public Iterator iterateElementDecls() {
        return elementDecls.values().iterator();
    }
    
    public ElementDecl[] getElementDecls() {
        ElementDecl[] r = new DeclImpl[elementDecls.size()];
        elementDecls.values().toArray(r);
        return r;
    }

    public AttributesDecl getAttributesDeclByName( String name ) {
        return (AttributesDecl)attributesDecls.get(name);
    }
    
    public Iterator iterateAttributesDecls() {
        return attributesDecls.values().iterator();
    }
    
    public AttributesDecl[] getAttributesDecls() {
        AttributesDecl[] r = new DeclImpl[attributesDecls.size()];
        attributesDecls.values().toArray(r);
        return r;
    }

    public AttributesVerifier createNewAttributesVerifier(
        String namespaceURI, AttributesDecl[] decls ) {
        throw new Error("not implemented");
    }
    
    protected void bind( ReferenceContainer con, Binder binder ) {
        ReferenceExp[] exps = con.getAll();
        for( int i=0; i