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 * published by the Free Software Foundation.  Oracle designates this

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 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

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package com.sun.tools.internal.xjc.reader.relaxng;

import com.sun.tools.internal.xjc.model.CBuiltinLeafInfo;

import com.sun.tools.internal.xjc.model.TypeUse;

import com.sun.tools.internal.xjc.model.TypeUseFactory;

import com.sun.xml.internal.rngom.digested.DAttributePattern;

import com.sun.xml.internal.rngom.digested.DChoicePattern;

import com.sun.xml.internal.rngom.digested.DContainerPattern;

import com.sun.xml.internal.rngom.digested.DDataPattern;

import com.sun.xml.internal.rngom.digested.DElementPattern;

import com.sun.xml.internal.rngom.digested.DEmptyPattern;

import com.sun.xml.internal.rngom.digested.DGrammarPattern;

import com.sun.xml.internal.rngom.digested.DGroupPattern;

import com.sun.xml.internal.rngom.digested.DInterleavePattern;

import com.sun.xml.internal.rngom.digested.DListPattern;

import com.sun.xml.internal.rngom.digested.DMixedPattern;

import com.sun.xml.internal.rngom.digested.DNotAllowedPattern;

import com.sun.xml.internal.rngom.digested.DOneOrMorePattern;

import com.sun.xml.internal.rngom.digested.DOptionalPattern;

import com.sun.xml.internal.rngom.digested.DPattern;

import com.sun.xml.internal.rngom.digested.DPatternVisitor;

import com.sun.xml.internal.rngom.digested.DRefPattern;

import com.sun.xml.internal.rngom.digested.DTextPattern;

import com.sun.xml.internal.rngom.digested.DValuePattern;

import com.sun.xml.internal.rngom.digested.DZeroOrMorePattern;

/**

 * Walks the pattern tree and binds it to a {@link TypeUse}.

 *

 * The singleton instance is kept in {@link RELAXNGCompiler}.

 *

 * TODO: I should really normalize before process.

 *

 * @author Kohsuke Kawaguchi

 */

final class TypeUseBinder implements DPatternVisitor<TypeUse> {

    private final RELAXNGCompiler compiler;

    public TypeUseBinder(RELAXNGCompiler compiler) {

        this.compiler = compiler;

    }

    public TypeUse onGrammar(DGrammarPattern p) {

        return CBuiltinLeafInfo.STRING;

    }

    public TypeUse onChoice(DChoicePattern p) {

        // can't support unions

        return CBuiltinLeafInfo.STRING;

    }

    public TypeUse onData(DDataPattern p) {

        return onDataType(p.getDatatypeLibrary(), p.getType());

    }

    public TypeUse onValue(DValuePattern p) {

        return onDataType(p.getDatatypeLibrary(),p.getType());

    }

    private TypeUse onDataType(String datatypeLibrary, String type) {

        DatatypeLib lib = compiler.datatypes.get(datatypeLibrary);

        if(lib!=null) {

            TypeUse use = lib.get(type);

            if(use!=null)

                return use;

        }

        // unknown

        return CBuiltinLeafInfo.STRING;

    }

    public TypeUse onInterleave(DInterleavePattern p) {

        return onContainer(p);

    }

    public TypeUse onGroup(DGroupPattern p) {

        return onContainer(p);

    }

    private TypeUse onContainer(DContainerPattern p) {

        TypeUse t=null;

        for( DPattern child : p ) {

            TypeUse s = child.accept(this);

            if(t!=null && t!=s)

                return CBuiltinLeafInfo.STRING; // heterogenous

            t = s;

        }

        return t;

    }

    public TypeUse onNotAllowed(DNotAllowedPattern p) {

        // TODO

        return error();

    }

    public TypeUse onEmpty(DEmptyPattern p) {

        return CBuiltinLeafInfo.STRING;

    }

    public TypeUse onList(DListPattern p) {

        return p.getChild().accept(this);

    }

    public TypeUse onOneOrMore(DOneOrMorePattern p) {

        return TypeUseFactory.makeCollection( p.getChild().accept(this) );

    }

    public TypeUse onZeroOrMore(DZeroOrMorePattern p) {

        return TypeUseFactory.makeCollection( p.getChild().accept(this) );

    }

    public TypeUse onOptional(DOptionalPattern p) {

        return CBuiltinLeafInfo.STRING;

    }

    public TypeUse onRef(DRefPattern p) {

        // TODO: check for enums

        return p.getTarget().getPattern().accept(this);

    }

    public TypeUse onText(DTextPattern p) {

        return CBuiltinLeafInfo.STRING;

    }

//

//

// Not allowed in this context

//

//

    public TypeUse onAttribute(DAttributePattern p) {

        return error();

    }

    public TypeUse onElement(DElementPattern p) {

        return error();

    }

    public TypeUse onMixed(DMixedPattern p) {

        return error();

    }

    private TypeUse error() {

        throw new IllegalStateException();

    }

}