| /* |
| * 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; |
| |
| import org.apache.commons.compress.harmony.unpack200.SegmentUtils; |
| |
| /** |
| * Name and Type pair constant pool entry. |
| */ |
| public class CPNameAndType extends ConstantPoolEntry { |
| |
| CPUTF8 descriptor; |
| |
| transient int descriptorIndex; |
| |
| CPUTF8 name; |
| |
| transient int nameIndex; |
| |
| private boolean hashCodeComputed; |
| |
| private int cachedHashCode; |
| |
| /** |
| * Constructs a new CPNameAndType. |
| * |
| * @param name TODO |
| * @param descriptor TODO |
| * @param globalIndex index in CpBands |
| * @throws NullPointerException if name or descriptor is null |
| */ |
| public CPNameAndType(final CPUTF8 name, final CPUTF8 descriptor, final int globalIndex) { |
| super(CP_NameAndType, globalIndex); |
| this.name = Objects.requireNonNull(name, "name"); |
| this.descriptor = Objects.requireNonNull(descriptor, "descriptor"); |
| } |
| |
| /* |
| * field_info { u2 access_flags; u2 name_index; u2 descriptor_index; u2 attributes_count; attribute_info attributes[attributes_count]; } |
| */ |
| |
| @Override |
| public boolean equals(final Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj == null) { |
| return false; |
| } |
| if (getClass() != obj.getClass()) { |
| return false; |
| } |
| final CPNameAndType other = (CPNameAndType) obj; |
| if (!descriptor.equals(other.descriptor)) { |
| return false; |
| } |
| if (!name.equals(other.name)) { |
| return false; |
| } |
| return true; |
| } |
| |
| private void generateHashCode() { |
| hashCodeComputed = true; |
| final int PRIME = 31; |
| int result = 1; |
| result = PRIME * result + descriptor.hashCode(); |
| result = PRIME * result + name.hashCode(); |
| cachedHashCode = result; |
| } |
| |
| @Override |
| protected ClassFileEntry[] getNestedClassFileEntries() { |
| return new ClassFileEntry[] { name, descriptor }; |
| } |
| |
| @Override |
| public int hashCode() { |
| if (!hashCodeComputed) { |
| generateHashCode(); |
| } |
| return cachedHashCode; |
| } |
| |
| /** |
| * Answers the invokeinterface count argument when the receiver is treated as an invokeinterface target. This value is not meaningful if the receiver is not |
| * an invokeinterface target. |
| * |
| * @return count |
| */ |
| public int invokeInterfaceCount() { |
| return 1 + SegmentUtils.countInvokeInterfaceArgs(descriptor.underlyingString()); |
| } |
| |
| @Override |
| protected void resolve(final ClassConstantPool pool) { |
| super.resolve(pool); |
| descriptorIndex = pool.indexOf(descriptor); |
| nameIndex = pool.indexOf(name); |
| } |
| |
| @Override |
| public String toString() { |
| return "NameAndType: " + name + "(" + descriptor + ")"; |
| } |
| |
| @Override |
| protected void writeBody(final DataOutputStream dos) throws IOException { |
| dos.writeShort(nameIndex); |
| dos.writeShort(descriptorIndex); |
| } |
| } |