01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * 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.harmony.pack200.bytecode.forms;
18:
19: import org.apache.harmony.pack200.Pack200Exception;
20: import org.apache.harmony.pack200.SegmentConstantPool;
21: import org.apache.harmony.pack200.bytecode.ByteCode;
22: import org.apache.harmony.pack200.bytecode.ClassFileEntry;
23: import org.apache.harmony.pack200.bytecode.OperandManager;
24:
25: /**
26: * Abstract class of all ByteCodeForms which add a nested
27: * entry from the globalConstantPool.
28: */
29: public abstract class ReferenceForm extends ByteCodeForm {
30:
31: public ReferenceForm(int opcode, String name, int[] rewrite) {
32: super (opcode, name, rewrite);
33: // TODO Auto-generated constructor stub
34: }
35:
36: protected abstract int getPoolID();
37:
38: protected abstract int getOffset(OperandManager operandManager);
39:
40: protected void setNestedEntries(ByteCode byteCode,
41: OperandManager operandManager, int offset)
42: throws Pack200Exception {
43: SegmentConstantPool globalPool = operandManager
44: .globalConstantPool();
45: ClassFileEntry[] nested = null;
46: nested = new ClassFileEntry[] { globalPool
47: .getConstantPoolEntry(getPoolID(), offset) };
48: byteCode.setNested(nested);
49: byteCode.setNestedPositions(new int[][] { { 0, 2 } });
50: }
51:
52: /* (non-Javadoc)
53: * @see org.apache.harmony.pack200.bytecode.forms.ByteCodeForm#setByteCodeOperands(org.apache.harmony.pack200.bytecode.ByteCode, org.apache.harmony.pack200.bytecode.OperandTable, org.apache.harmony.pack200.Segment)
54: */
55: public void setByteCodeOperands(ByteCode byteCode,
56: OperandManager operandManager, int codeLength) {
57: int offset = getOffset(operandManager);
58: try {
59: setNestedEntries(byteCode, operandManager, offset);
60: } catch (Pack200Exception ex) {
61: throw new Error("Got a pack200 exception. What to do?");
62: }
63: }
64: }
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