org.snapscript.dx.rop.code.CstInsn Maven / Gradle / Ivy
/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.snapscript.dx.rop.code;
import org.snapscript.dx.rop.cst.Constant;
/**
* Instruction which contains an explicit reference to a constant.
*/
public abstract class CstInsn
extends Insn {
/** {@code non-null;} the constant */
private final Constant cst;
/**
* Constructs an instance.
*
* @param opcode {@code non-null;} the opcode
* @param position {@code non-null;} source position
* @param result {@code null-ok;} spec for the result, if any
* @param sources {@code non-null;} specs for all the sources
* @param cst {@code non-null;} constant
*/
public CstInsn(Rop opcode, SourcePosition position, RegisterSpec result,
RegisterSpecList sources, Constant cst) {
super(opcode, position, result, sources);
if (cst == null) {
throw new NullPointerException("cst == null");
}
this.cst = cst;
}
/** {@inheritDoc} */
@Override
public String getInlineString() {
return cst.toHuman();
}
/**
* Gets the constant.
*
* @return {@code non-null;} the constant
*/
public Constant getConstant() {
return cst;
}
/** {@inheritDoc} */
@Override
public boolean contentEquals(Insn b) {
/*
* The cast (CstInsn)b below should always succeed since
* Insn.contentEquals compares classes of this and b.
*/
return super.contentEquals(b)
&& cst.equals(((CstInsn)b).getConstant());
}
}