| /* |
| * 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.nio.charset.StandardCharsets; |
| import java.util.Objects; |
| |
| /** |
| * UTF8 constant pool entry, used for storing long Strings. |
| */ |
| public class CPUTF8 extends ConstantPoolEntry { |
| |
| private final String utf8; |
| |
| private boolean hashCodeComputed; |
| |
| private int cachedHashCode; |
| |
| public CPUTF8(final String string) { |
| this(string, -1); |
| } |
| |
| /** |
| * Creates a new CPUTF8 instance |
| * |
| * @param utf8 TODO |
| * @param globalIndex index in CpBands |
| * @throws NullPointerException if utf8 is null |
| */ |
| public CPUTF8(final String utf8, final int globalIndex) { |
| super(CP_UTF8, globalIndex); |
| this.utf8 = Objects.requireNonNull(utf8, "utf8"); |
| } |
| |
| @Override |
| public boolean equals(final Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj == null) { |
| return false; |
| } |
| if (this.getClass() != obj.getClass()) { |
| return false; |
| } |
| final CPUTF8 other = (CPUTF8) obj; |
| return utf8.equals(other.utf8); |
| } |
| |
| private void generateHashCode() { |
| hashCodeComputed = true; |
| final int PRIME = 31; |
| cachedHashCode = PRIME + utf8.hashCode(); |
| } |
| |
| @Override |
| public int hashCode() { |
| if (!hashCodeComputed) { |
| generateHashCode(); |
| } |
| return cachedHashCode; |
| } |
| |
| public void setGlobalIndex(final int index) { |
| globalIndex = index; |
| } |
| |
| @Override |
| public String toString() { |
| return StandardCharsets.UTF_8.name() + ":" + utf8; |
| } |
| |
| public String underlyingString() { |
| return utf8; |
| } |
| |
| @Override |
| protected void writeBody(final DataOutputStream dos) throws IOException { |
| dos.writeUTF(utf8); |
| } |
| } |