1 /* 2 * Copyright (C) 2007 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.dx.cf.attrib; 18 19 import com.android.dx.rop.cst.CstDouble; 20 import com.android.dx.rop.cst.CstFloat; 21 import com.android.dx.rop.cst.CstInteger; 22 import com.android.dx.rop.cst.CstLong; 23 import com.android.dx.rop.cst.CstString; 24 import com.android.dx.rop.cst.TypedConstant; 25 26 /** 27 * Attribute class for standard {@code ConstantValue} attributes. 28 */ 29 public final class AttConstantValue extends BaseAttribute { 30 /** {@code non-null;} attribute name for attributes of this type */ 31 public static final String ATTRIBUTE_NAME = "ConstantValue"; 32 33 /** {@code non-null;} the constant value */ 34 private final TypedConstant constantValue; 35 36 /** 37 * Constructs an instance. 38 * 39 * @param constantValue {@code non-null;} the constant value, which must 40 * be an instance of one of: {@code CstString}, 41 * {@code CstInteger}, {@code CstLong}, 42 * {@code CstFloat}, or {@code CstDouble} 43 */ 44 public AttConstantValue(TypedConstant constantValue) { 45 super(ATTRIBUTE_NAME); 46 47 if (!((constantValue instanceof CstString) || 48 (constantValue instanceof CstInteger) || 49 (constantValue instanceof CstLong) || 50 (constantValue instanceof CstFloat) || 51 (constantValue instanceof CstDouble))) { 52 if (constantValue == null) { 53 throw new NullPointerException("constantValue == null"); 54 } 55 throw new IllegalArgumentException("bad type for constantValue"); 56 } 57 58 this.constantValue = constantValue; 59 } 60 61 /** {@inheritDoc} */ 62 public int byteLength() { 63 return 8; 64 } 65 66 /** 67 * Gets the constant value of this instance. The returned value 68 * is an instance of one of: {@code CstString}, 69 * {@code CstInteger}, {@code CstLong}, 70 * {@code CstFloat}, or {@code CstDouble}. 71 * 72 * @return {@code non-null;} the constant value 73 */ 74 public TypedConstant getConstantValue() { 75 return constantValue; 76 } 77 } 78
