001/*
002 *  Licensed to the Apache Software Foundation (ASF) under one or more
003 *  contributor license agreements.  See the NOTICE file distributed with
004 *  this work for additional information regarding copyright ownership.
005 *  The ASF licenses this file to You under the Apache License, Version 2.0
006 *  (the "License"); you may not use this file except in compliance with
007 *  the License.  You may obtain a copy of the License at
008 *
009 *     http://www.apache.org/licenses/LICENSE-2.0
010 *
011 *  Unless required by applicable law or agreed to in writing, software
012 *  distributed under the License is distributed on an "AS IS" BASIS,
013 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 *  See the License for the specific language governing permissions and
015 *  limitations under the License.
016 */
017package org.apache.commons.compress.harmony.unpack200.bytecode;
018
019import java.io.DataOutputStream;
020import java.io.IOException;
021import java.util.ArrayList;
022import java.util.List;
023
024/**
025 * Parameter annotations class file attribute, either a RuntimeVisibleParameterAnnotations attribute or a
026 * RuntimeInvisibleParameterAnnotations attribute.
027 */
028public class RuntimeVisibleorInvisibleParameterAnnotationsAttribute extends AnnotationsAttribute {
029
030    /**
031     * ParameterAnnotation represents the annotations on a single parameter.
032     */
033    public static class ParameterAnnotation {
034
035        private final Annotation[] annotations;
036        private final int numAnnotations;
037
038        public ParameterAnnotation(final Annotation[] annotations) {
039            this.numAnnotations = annotations.length;
040            this.annotations = annotations;
041        }
042
043        public List<Object> getClassFileEntries() {
044            final List<Object> nested = new ArrayList<>();
045            for (final Annotation annotation : annotations) {
046                nested.addAll(annotation.getClassFileEntries());
047            }
048            return nested;
049        }
050
051        public int getLength() {
052            int length = 2;
053            for (final Annotation annotation : annotations) {
054                length += annotation.getLength();
055            }
056            return length;
057        }
058
059        public void resolve(final ClassConstantPool pool) {
060            for (final Annotation annotation : annotations) {
061                annotation.resolve(pool);
062            }
063        }
064
065        public void writeBody(final DataOutputStream dos) throws IOException {
066            dos.writeShort(numAnnotations);
067            for (final Annotation annotation : annotations) {
068                annotation.writeBody(dos);
069            }
070        }
071
072    }
073    private final int numParameters;
074
075    private final ParameterAnnotation[] parameterAnnotations;
076
077    public RuntimeVisibleorInvisibleParameterAnnotationsAttribute(final CPUTF8 name,
078        final ParameterAnnotation[] parameterAnnotations) {
079        super(name);
080        this.numParameters = parameterAnnotations.length;
081        this.parameterAnnotations = parameterAnnotations;
082    }
083
084    @Override
085    protected int getLength() {
086        int length = 1;
087        for (int i = 0; i < numParameters; i++) {
088            length += parameterAnnotations[i].getLength();
089        }
090        return length;
091    }
092
093    @Override
094    protected ClassFileEntry[] getNestedClassFileEntries() {
095        final List<Object> nested = new ArrayList<>();
096        nested.add(attributeName);
097        for (final ParameterAnnotation parameterAnnotation : parameterAnnotations) {
098            nested.addAll(parameterAnnotation.getClassFileEntries());
099        }
100        return nested.toArray(ClassFileEntry.NONE);
101    }
102
103    @Override
104    protected void resolve(final ClassConstantPool pool) {
105        super.resolve(pool);
106        for (final ParameterAnnotation parameterAnnotation : parameterAnnotations) {
107            parameterAnnotation.resolve(pool);
108        }
109    }
110
111    @Override
112    public String toString() {
113        return attributeName.underlyingString() + ": " + numParameters + " parameter annotations";
114    }
115
116    @Override
117    protected void writeBody(final DataOutputStream dos) throws IOException {
118        dos.writeByte(numParameters);
119        for (int i = 0; i < numParameters; i++) {
120            parameterAnnotations[i].writeBody(dos);
121        }
122    }
123
124}