/*******************************************************************************
 * 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.lookup.Binding;
import net.sourceforge.phpdt.internal.compiler.lookup.BindingIds;
import net.sourceforge.phpdt.internal.compiler.lookup.FieldBinding;
import net.sourceforge.phpdt.internal.compiler.lookup.InvocationSite;
import net.sourceforge.phpdt.internal.compiler.lookup.ReferenceBinding;
import net.sourceforge.phpdt.internal.compiler.lookup.TypeBinding;

public abstract class NameReference extends Reference implements
		InvocationSite, BindingIds {

	public Binding binding, codegenBinding; // may be
											// aTypeBinding-aFieldBinding-aLocalVariableBinding

	public TypeBinding receiverType; // raw receiver type

	public TypeBinding actualReceiverType; // modified receiver type - actual
											// one according to namelookup

	// the error printing
	// some name reference are build as name reference but
	// only used as type reference. When it happens, instead of
	// creating a new objet (aTypeReference) we just flag a boolean
	// This concesion is valuable while their are cases when the NameReference
	// will be a TypeReference (static message sends.....) and there is
	// no changeClass in java.
	public NameReference() {
		super();
		bits |= TYPE | VARIABLE; // restrictiveFlag

	}

	public FieldBinding fieldBinding() {
		// this method should be sent ONLY after a check against
		// isFieldReference()
		// check its use doing senders.........

		return (FieldBinding) binding;
	}

	public boolean isSuperAccess() {
		return false;
	}

	public boolean isTypeAccess() {
		// null is acceptable when we are resolving the first part of a
		// reference
		return binding == null || binding instanceof ReferenceBinding;
	}

	public boolean isTypeReference() {
		return binding instanceof ReferenceBinding;
	}

	public void setActualReceiverType(ReferenceBinding receiverType) {
		this.actualReceiverType = receiverType;
	}

	public void setDepth(int depth) {
		bits &= ~DepthMASK; // flush previous depth if any
		if (depth > 0) {
			bits |= (depth & 0xFF) << DepthSHIFT; // encoded on 8 bits
		}
	}

	public void setFieldIndex(int index) {
		// ignored
	}

	public abstract String unboundReferenceErrorName();
}