trunk/generator/schema2template/src/main/java/schema2template/model/MSVExpressionVisitorChildren.java

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 * 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
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package schema2template.model;

import com.sun.msv.grammar.AttributeExp;
import com.sun.msv.grammar.ChoiceExp;
import com.sun.msv.grammar.ConcurExp;
import com.sun.msv.grammar.DataExp;
import com.sun.msv.grammar.ElementExp;
import com.sun.msv.grammar.Expression;
import com.sun.msv.grammar.ExpressionVisitor;
import com.sun.msv.grammar.InterleaveExp;
import com.sun.msv.grammar.ListExp;
import com.sun.msv.grammar.MixedExp;
import com.sun.msv.grammar.OneOrMoreExp;
import com.sun.msv.grammar.OtherExp;
import com.sun.msv.grammar.ReferenceExp;
import com.sun.msv.grammar.SequenceExp;
import com.sun.msv.grammar.ValueExp;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;

/**
 * This visitor visits an Expression and returns a list of child expressions
 *
 * <p>Usage example:
 * <em>(List&lt;Expression&gt;) myExpression.visit(myMSVExpressionVisitorChildren)</em></p>
 *
 * <p>Please note that you do not use any method of this class directly!</p>
 */
public class MSVExpressionVisitorChildren implements ExpressionVisitor {

    private static final List<Expression> empty = Collections.EMPTY_LIST;

    public List<Expression> onAnyString() {
        return empty;
    }

    public List<Expression> onAttribute(AttributeExp exp) {
        return child(exp.exp);
    }

    public List<Expression> onChoice(ChoiceExp exp) {
        return children(exp.children());
    }

    public List<Expression> onConcur(ConcurExp exp) {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    public List<Expression> onData(DataExp exp) {
        return empty;
    }

    public List<Expression> onElement(ElementExp exp) {
        return child(exp.getContentModel());
    }

    public List<Expression> onEpsilon() {
        return empty;
    }

    public List<Expression> onInterleave(InterleaveExp exp) {
        return children(exp.children());
    }

    public List<Expression> onList(ListExp exp) {
        return child(exp.exp);
    }

    public List<Expression> onMixed(MixedExp exp) {
        return child(exp.exp);
    }

    public List<Expression> onNullSet() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    public List<Expression> onOneOrMore(OneOrMoreExp exp) {
        return child(exp.exp);
    }

    public List<Expression> onOther(OtherExp exp) {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    public List<Expression> onRef(ReferenceExp exp) {
        return child(exp.exp);
    }

    public List<Expression> onSequence(SequenceExp exp) {
        return children(exp.children());
    }

    public List<Expression> onValue(ValueExp exp) {
        return empty;
    }

    private List<Expression> children(Iterator<Expression> i) {
        ArrayList<Expression> list = new ArrayList<Expression>();
        while (i.hasNext()) {
            list.add(i.next());
        }
        return list;
    }

    private List<Expression> child(Expression e) {
        return Collections.singletonList(e);
    }

}