| /* |
| * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. |
| */ |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 com.sun.org.apache.bcel.internal.generic; |
| |
| /** |
| * DCONST - Push 0.0 or 1.0, other values cause an exception |
| * |
| * <PRE>Stack: ... -> ..., </PRE> |
| * |
| * @version $Id: DCONST.java 1747278 2016-06-07 17:28:43Z britter $ |
| */ |
| public class DCONST extends Instruction implements ConstantPushInstruction { |
| |
| private double value; |
| |
| |
| /** |
| * Empty constructor needed for the Class.newInstance() statement in |
| * Instruction.readInstruction(). Not to be used otherwise. |
| */ |
| DCONST() { |
| } |
| |
| |
| public DCONST(final double f) { |
| super(com.sun.org.apache.bcel.internal.Const.DCONST_0, (short) 1); |
| if (f == 0.0) { |
| super.setOpcode(com.sun.org.apache.bcel.internal.Const.DCONST_0); |
| } else if (f == 1.0) { |
| super.setOpcode(com.sun.org.apache.bcel.internal.Const.DCONST_1); |
| } else { |
| throw new ClassGenException("DCONST can be used only for 0.0 and 1.0: " + f); |
| } |
| value = f; |
| } |
| |
| |
| @Override |
| public Number getValue() { |
| return new Double(value); |
| } |
| |
| |
| /** @return Type.DOUBLE |
| */ |
| @Override |
| public Type getType( final ConstantPoolGen cp ) { |
| return Type.DOUBLE; |
| } |
| |
| |
| /** |
| * Call corresponding visitor method(s). The order is: |
| * Call visitor methods of implemented interfaces first, then |
| * call methods according to the class hierarchy in descending order, |
| * i.e., the most specific visitXXX() call comes last. |
| * |
| * @param v Visitor object |
| */ |
| @Override |
| public void accept( final Visitor v ) { |
| v.visitPushInstruction(this); |
| v.visitStackProducer(this); |
| v.visitTypedInstruction(this); |
| v.visitConstantPushInstruction(this); |
| v.visitDCONST(this); |
| } |
| } |