content: /*
   * 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 com.taobao.android.dx.cf.attrib;
  
  import com.taobao.android.dx.rop.cst.CstDouble;
  import com.taobao.android.dx.rop.cst.CstFloat;
  import com.taobao.android.dx.rop.cst.CstInteger;
  import com.taobao.android.dx.rop.cst.CstLong;
  import com.taobao.android.dx.rop.cst.CstString;
  import com.taobao.android.dx.rop.cst.TypedConstant;
  
  /**
   * Attribute class for standard {@code ConstantValue} attributes.
   */
  public final class AttConstantValue extends BaseAttribute {
      /** {@code non-null;} attribute name for attributes of this type */
      public static final String ATTRIBUTE_NAME = "ConstantValue";
  
      /** {@code non-null;} the constant value */
      private final TypedConstant constantValue;
  
      /**
       * Constructs an instance.
       *
       * @param constantValue {@code non-null;} the constant value, which must
       * be an instance of one of: {@code CstString},
       * {@code CstInteger}, {@code CstLong},
       * {@code CstFloat}, or {@code CstDouble}
       */
      public AttConstantValue(TypedConstant constantValue) {
          super(ATTRIBUTE_NAME);
  
          if (!((constantValue instanceof CstString) ||
                 (constantValue instanceof CstInteger) ||
                 (constantValue instanceof CstLong) ||
                 (constantValue instanceof CstFloat) ||
                 (constantValue instanceof CstDouble))) {
              if (constantValue == null) {
                  throw new NullPointerException("constantValue == null");
              }
              throw new IllegalArgumentException("bad type for constantValue");
          }
  
          this.constantValue = constantValue;
      }
  
      /** {@inheritDoc} */
      public int byteLength() {
          return 8;
      }
  
      /**
       * Gets the constant value of this instance. The returned value
       * is an instance of one of: {@code CstString},
       * {@code CstInteger}, {@code CstLong},
       * {@code CstFloat}, or {@code CstDouble}.
       *
       * @return {@code non-null;} the constant value
       */
      public TypedConstant getConstantValue() {
          return constantValue;
      }
  }
  