/*
    *  Licensed to the Apache Software Foundation (ASF) under one or more
    *  contributor license agreements.  See the NOTICE file distributed with
    *  this work for additional information regarding copyright ownership.
    *  The ASF licenses this file to You 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 org.apache.commons.compress.harmony.unpack200.bytecode.forms;
  
  import org.apache.commons.compress.harmony.pack200.Pack200Exception;
  import org.apache.commons.compress.harmony.unpack200.bytecode.ByteCode;
  import org.apache.commons.compress.harmony.unpack200.bytecode.OperandManager;
  
  /**
   * Some bytecodes (such as (a)ldc, fldc and ildc) have single-byte references to the class pool. This class is the abstract superclass of those classes.
   */
  public abstract class SingleByteReferenceForm extends ReferenceForm {
  
      protected boolean widened;
  
      public SingleByteReferenceForm(final int opcode, final String name, final int[] rewrite) {
          super(opcode, name, rewrite);
      }
  
      @Override
      protected abstract int getOffset(OperandManager operandManager);
  
      @Override
      protected abstract int getPoolID();
  
      @Override
      public boolean nestedMustStartClassPool() {
          return !widened;
      }
  
      @Override
      protected void setNestedEntries(final ByteCode byteCode, final OperandManager operandManager, final int offset) throws Pack200Exception {
          super.setNestedEntries(byteCode, operandManager, offset);
          if (widened) {
              byteCode.setNestedPositions(new int[][] { { 0, 2 } });
          } else {
              byteCode.setNestedPositions(new int[][] { { 0, 1 } });
          }
      }
  }