/*******************************************************************************
 * Copyright (c) 2000, 2013 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *     Stephan Herrmann - Contribution for
 *								bug 331649 - [compiler][null] consider null annotations for fields
 *******************************************************************************/
package org.eclipse.jdt.internal.compiler.ast;

import org.eclipse.jdt.internal.compiler.lookup.*;

public abstract class NameReference extends Reference implements InvocationSite {

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

	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 object (aTypeReference) we just flag a boolean
	//This concesion is valuable while there are cases when the NameReference
	//will be a TypeReference (static message sends.....) and there is
	//no changeClass in java.
public NameReference() {
	this.bits |= Binding.TYPE | Binding.VARIABLE; // restrictiveFlag
}

/** 
 * Use this method only when sure that the current reference is <strong>not</strong>
 * a chain of several fields (QualifiedNameReference with more than one field).
 * Otherwise use {@link #lastFieldBinding()}.
 */
public FieldBinding fieldBinding() {
	//this method should be sent ONLY after a check against isFieldReference()
	//check its use doing senders.........
	return (FieldBinding) this.binding ;
}

public FieldBinding lastFieldBinding() {
	if ((this.bits & ASTNode.RestrictiveFlagMASK) == Binding.FIELD)
		return fieldBinding(); // most subclasses only refer to one field anyway
	return null;
}

public boolean isSuperAccess() {
	return false;
}

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

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

public void setActualReceiverType(ReferenceBinding receiverType) {
	if (receiverType == null) return; // error scenario only
	this.actualReceiverType = receiverType;
}

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

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

public abstract String unboundReferenceErrorName();
}