/*******************************************************************************
 * Copyright (c) 2000, 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package net.sourceforge.phpdt.internal.compiler.ast;

import net.sourceforge.phpdt.internal.compiler.ASTVisitor;
import net.sourceforge.phpdt.internal.compiler.flow.FlowContext;
import net.sourceforge.phpdt.internal.compiler.flow.FlowInfo;
import net.sourceforge.phpdt.internal.compiler.lookup.BlockScope;
import net.sourceforge.phpdt.internal.compiler.lookup.ClassScope;
import net.sourceforge.phpdt.internal.compiler.lookup.Scope;
import net.sourceforge.phpdt.internal.compiler.lookup.TypeBinding;

public abstract class TypeReference extends Expression {

	public TypeReference() {
		super();
	}

	public FlowInfo analyseCode(BlockScope currentScope,
			FlowContext flowContext, FlowInfo flowInfo) {
		return flowInfo;
	}

	// allows us to trap completion & selection nodes
	public void aboutToResolve(Scope scope) {
	}

	/*
	 * Answer a base type reference (can be an array of base type).
	 */
	// public static final TypeReference baseTypeReference(int baseType, int
	// dim) {
	//	
	// if (dim == 0) {
	// switch (baseType) {
	// case (T_void) :
	// return new SingleTypeReference(VoidBinding.simpleName, 0);
	// case (T_boolean) :
	// return new SingleTypeReference(BooleanBinding.simpleName, 0);
	// case (T_char) :
	// return new SingleTypeReference(CharBinding.simpleName, 0);
	// case (T_float) :
	// return new SingleTypeReference(FloatBinding.simpleName, 0);
	// case (T_double) :
	// return new SingleTypeReference(DoubleBinding.simpleName, 0);
	// case (T_byte) :
	// return new SingleTypeReference(ByteBinding.simpleName, 0);
	// case (T_short) :
	// return new SingleTypeReference(ShortBinding.simpleName, 0);
	// case (T_int) :
	// return new SingleTypeReference(IntBinding.simpleName, 0);
	// default : //T_long
	// return new SingleTypeReference(LongBinding.simpleName, 0);
	// }
	// }
	// switch (baseType) {
	// case (T_void) :
	// return new ArrayTypeReference(VoidBinding.simpleName, dim, 0);
	// case (T_boolean) :
	// return new ArrayTypeReference(BooleanBinding.simpleName, dim, 0);
	// case (T_char) :
	// return new ArrayTypeReference(CharBinding.simpleName, dim, 0);
	// case (T_float) :
	// return new ArrayTypeReference(FloatBinding.simpleName, dim, 0);
	// case (T_double) :
	// return new ArrayTypeReference(DoubleBinding.simpleName, dim, 0);
	// case (T_byte) :
	// return new ArrayTypeReference(ByteBinding.simpleName, dim, 0);
	// case (T_short) :
	// return new ArrayTypeReference(ShortBinding.simpleName, dim, 0);
	// case (T_int) :
	// return new ArrayTypeReference(IntBinding.simpleName, dim, 0);
	// default : //T_long
	// return new ArrayTypeReference(LongBinding.simpleName, dim, 0);
	// }
	// }
	public abstract TypeReference copyDims(int dim);

	public int dimensions() {
		return 0;
	}

	public abstract TypeBinding getTypeBinding(Scope scope);

	/**
	 * @return char[][]
	 */
	public abstract char[][] getTypeName();

	public boolean isTypeReference() {
		return true;
	}

	public TypeBinding resolveType(BlockScope scope) {
		// handle the error here
		constant = NotAConstant;
		if (this.resolvedType != null) { // is a shared type reference which
											// was already resolved
			if (!this.resolvedType.isValidBinding())
				return null; // already reported error
		} else {
			this.resolvedType = getTypeBinding(scope);
			if (!this.resolvedType.isValidBinding()) {
				scope.problemReporter().invalidType(this, this.resolvedType);
				return null;
			}
			if (isTypeUseDeprecated(this.resolvedType, scope))
				scope.problemReporter().deprecatedType(this.resolvedType, this);
		}
		return this.resolvedType;
	}

	public abstract void traverse(ASTVisitor visitor, ClassScope classScope);
}