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      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.iface;
     18 
     19 import com.android.dx.cf.attrib.AttConstantValue;
     20 import com.android.dx.rop.cst.CstNat;
     21 import com.android.dx.rop.cst.CstType;
     22 import com.android.dx.rop.cst.TypedConstant;
     23 
     24 /**
     25  * Standard implementation of {@link Field}, which directly stores
     26  * all the associated data.
     27  */
     28 public final class StdField extends StdMember implements Field {
     29     /**
     30      * Constructs an instance.
     31      *
     32      * @param definingClass {@code non-null;} the defining class
     33      * @param accessFlags access flags
     34      * @param nat {@code non-null;} member name and type (descriptor)
     35      * @param attributes {@code non-null;} list of associated attributes
     36      */
     37     public StdField(CstType definingClass, int accessFlags, CstNat nat,
     38                     AttributeList attributes) {
     39         super(definingClass, accessFlags, nat, attributes);
     40     }
     41 
     42     /** {@inheritDoc} */
     43     @Override
     44     public TypedConstant getConstantValue() {
     45         AttributeList attribs = getAttributes();
     46         AttConstantValue cval = (AttConstantValue)
     47             attribs.findFirst(AttConstantValue.ATTRIBUTE_NAME);
     48 
     49         if (cval == null) {
     50             return null;
     51         }
     52 
     53         return cval.getConstantValue();
     54     }
     55 }
     56