| /* |
| * 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; |
| |
| import java.io.DataOutputStream; |
| import java.io.IOException; |
| import java.util.Objects; |
| |
| /** |
| * Field reference constant pool entry. |
| */ |
| public class CPFieldRef extends ConstantPoolEntry { |
| |
| CPClass className; |
| transient int classNameIndex; |
| private final CPNameAndType nameAndType; |
| transient int nameAndTypeIndex; |
| |
| private boolean hashCodeComputed; |
| |
| private int cachedHashCode; |
| |
| public CPFieldRef(final CPClass className, final CPNameAndType descriptor, final int globalIndex) { |
| super(CP_Fieldref, globalIndex); |
| this.className = className; |
| this.nameAndType = descriptor; |
| } |
| |
| @Override |
| public boolean equals(final Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj == null) { |
| return false; |
| } |
| if (getClass() != obj.getClass()) { |
| return false; |
| } |
| final CPFieldRef other = (CPFieldRef) obj; |
| if (!Objects.equals(className, other.className)) { |
| return false; |
| } |
| if (!Objects.equals(nameAndType, other.nameAndType)) { |
| return false; |
| } |
| return true; |
| } |
| |
| private void generateHashCode() { |
| hashCodeComputed = true; |
| final int PRIME = 31; |
| int result = 1; |
| result = PRIME * result + (className == null ? 0 : className.hashCode()); |
| result = PRIME * result + (nameAndType == null ? 0 : nameAndType.hashCode()); |
| cachedHashCode = result; |
| } |
| |
| @Override |
| protected ClassFileEntry[] getNestedClassFileEntries() { |
| return new ClassFileEntry[] { className, nameAndType }; |
| } |
| |
| @Override |
| public int hashCode() { |
| if (!hashCodeComputed) { |
| generateHashCode(); |
| } |
| return cachedHashCode; |
| } |
| |
| @Override |
| protected void resolve(final ClassConstantPool pool) { |
| super.resolve(pool); |
| nameAndTypeIndex = pool.indexOf(nameAndType); |
| classNameIndex = pool.indexOf(className); |
| } |
| |
| @Override |
| public String toString() { |
| return "FieldRef: " + className + "#" + nameAndType; |
| } |
| |
| @Override |
| protected void writeBody(final DataOutputStream dos) throws IOException { |
| dos.writeShort(classNameIndex); |
| dos.writeShort(nameAndTypeIndex); |
| } |
| |
| } |