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/*
 * Spoon - http://spoon.gforge.inria.fr/
 * Copyright (C) 2006 INRIA Futurs 
 *
 * This software is governed by the CeCILL-C License under French law and
 * abiding by the rules of distribution of free software. You can use, modify
 * and/or redistribute the software under the terms of the CeCILL-C license as
 * circulated by CEA, CNRS and INRIA at http://www.cecill.info.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the CeCILL-C License for more details.
 *
 * The fact that you are presently reading this means that you have had
 * knowledge of the CeCILL-C license and that you accept its terms.
 */

package spoon.support.reflect.code;

import java.util.Set;
import java.util.TreeSet;

import spoon.reflect.code.CtExpression;
import spoon.reflect.code.CtLocalVariable;
import spoon.reflect.declaration.ModifierKind;
import spoon.reflect.reference.CtLocalVariableReference;
import spoon.reflect.reference.CtTypeReference;
import spoon.reflect.visitor.CtVisitor;
import spoon.support.reflect.declaration.CtElementImpl;

public class CtLocalVariableImpl extends CtStatementImpl implements
		CtLocalVariable {
	private static final long serialVersionUID = 1L;

	CtExpression defaultExpression;

	Set modifiers = EMPTY_SET();

	String name;

	CtTypeReference type;

	public boolean addModifier(ModifierKind modifier) {
        setMutable();
        return modifiers.add(modifier);
	}

	public boolean removeModifier(ModifierKind modifier) {
        setMutable();
        return modifiers.remove(modifier);
	}

	public void accept(CtVisitor visitor) {
		visitor.visitCtLocalVariable(this);
	}

	public CtExpression getDefaultExpression() {
		return defaultExpression;
	}

	public Set getModifiers() {
		return modifiers;
	}

	public CtLocalVariableReference getReference() {
		return getFactory().Code().createLocalVariableReference(this);
	}

	public String getSimpleName() {
		return name;
	}

	public CtTypeReference getType() {
		return type;
	}

	public ModifierKind getVisibility() {
		if (getModifiers().contains(ModifierKind.PUBLIC)) {
			return ModifierKind.PUBLIC;
		}
		if (getModifiers().contains(ModifierKind.PROTECTED)) {
			return ModifierKind.PROTECTED;
		}
		if (getModifiers().contains(ModifierKind.PRIVATE)) {
			return ModifierKind.PRIVATE;
		}
		return null;
	}

	public boolean hasModifier(ModifierKind modifier) {
		return modifiers.contains(modifier);
	}

	public void setDefaultExpression(CtExpression defaultExpression) {
		this.defaultExpression = defaultExpression;
		this.defaultExpression.setParent(this);
	}

	public void setModifiers(Set modifiers) {
		this.modifiers = modifiers;
	}

	public void setSimpleName(String simpleName) {
		this.name = simpleName;
	}

	public void setType(CtTypeReference type) {
		this.type = type;
	}

    private void setMutable() {
        if (modifiers == CtElementImpl. EMPTY_SET()) {
            modifiers = new TreeSet();
        }
    }

	public void setVisibility(ModifierKind visibility) {
        setMutable();
		getModifiers().remove(ModifierKind.PUBLIC);
		getModifiers().remove(ModifierKind.PROTECTED);
		getModifiers().remove(ModifierKind.PRIVATE);
		getModifiers().add(visibility);
	}

}