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1   /*
2    *  Licensed to the Apache Software Foundation (ASF) under one or more
3    *  contributor license agreements.  See the NOTICE file distributed with
4    *  this work for additional information regarding copyright ownership.
5    *  The ASF licenses this file to You under the Apache License, Version 2.0
6    *  (the "License"); you may not use this file except in compliance with
7    *  the License.  You may obtain a copy of the License at
8    *
9    *     http://www.apache.org/licenses/LICENSE-2.0
10   *
11   *  Unless required by applicable law or agreed to in writing, software
12   *  distributed under the License is distributed on an "AS IS" BASIS,
13   *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   *  See the License for the specific language governing permissions and
15   *  limitations under the License.
16   */
17  package org.apache.commons.compress.harmony.unpack200.bytecode.forms;
18  
19  import org.apache.commons.compress.harmony.pack200.Pack200Exception;
20  import org.apache.commons.compress.harmony.unpack200.SegmentConstantPool;
21  import org.apache.commons.compress.harmony.unpack200.bytecode.ByteCode;
22  import org.apache.commons.compress.harmony.unpack200.bytecode.ClassFileEntry;
23  import org.apache.commons.compress.harmony.unpack200.bytecode.OperandManager;
24  
25  /**
26   * Abstract superclass of all classes that have class-specific references to constant pool information. These classes have a context (a string representing a
27   * pack200 class) i.e., they send getClassSpecificPoolEntry instead of getConstantPoolEntry.
28   */
29  public abstract class ClassSpecificReferenceForm extends ReferenceForm {
30  
31      public ClassSpecificReferenceForm(final int opcode, final String name, final int[] rewrite) {
32          super(opcode, name, rewrite);
33      }
34  
35      protected abstract String context(OperandManager operandManager);
36  
37      @Override
38      protected abstract int getOffset(OperandManager operandManager);
39  
40      @Override
41      protected abstract int getPoolID();
42  
43      @Override
44      protected void setNestedEntries(final ByteCode byteCode, final OperandManager operandManager, final int offset) throws Pack200Exception {
45          final SegmentConstantPool globalPool = operandManager.globalConstantPool();
46          final ClassFileEntry[] nested = { globalPool.getClassSpecificPoolEntry(getPoolID(), offset, context(operandManager)) };
47          byteCode.setNested(nested);
48          byteCode.setNestedPositions(new int[][] { { 0, 2 } });
49      }
50  
51  }