/*
* MemberExpression.java
*
* Copyright (c) 2012 Mike Strobel
*
* This source code is based on the Dynamic Language Runtime from Microsoft,
* Copyright (c) Microsoft Corporation.
*
* This source code is subject to terms and conditions of the Apache License, Version 2.0.
* A copy of the license can be found in the License.html file at the root of this distribution.
* By using this source code in any fashion, you are agreeing to be bound by the terms of the
* Apache License, Version 2.0.
*
* You must not remove this notice, or any other, from this software.
*/
package com.strobel.expressions;
import com.strobel.reflection.FieldInfo;
import com.strobel.reflection.MemberInfo;
import com.strobel.reflection.MemberType;
import com.strobel.util.ContractUtils;
/**
* Represents accessing a field.
*
* @author Mike Strobel
*/
public abstract class MemberExpression extends Expression {
private final Expression _target;
MemberExpression(final Expression target) {
_target = target;
}
@Override
public final ExpressionType getNodeType() {
return ExpressionType.MemberAccess;
}
public final Expression getTarget() {
return _target;
}
MemberInfo getMember() {
throw ContractUtils.unreachable();
}
@Override
protected Expression accept(final ExpressionVisitor visitor) {
return visitor.visitMember(this);
}
public final MemberExpression update(final Expression target) {
if (target == _target) {
return this;
}
return makeMemberAccess(target, getMember());
}
static MemberExpression make(final Expression expression, final MemberInfo member) {
if (member.getMemberType() == MemberType.Field) {
final FieldInfo fi = (FieldInfo) member;
return new FieldExpression(expression, fi);
}
throw Error.memberNotField(member);
}
}