    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 RuntimeInvisibleParameterAnnotations attribute.
    026 */
    027public class RuntimeVisibleorInvisibleParameterAnnotationsAttribute extends AnnotationsAttribute {
    028
    029    /**
    030     * ParameterAnnotation represents the annotations on a single parameter.
    031     */
    032    public static class ParameterAnnotation {
    033
    034        private final Annotation[] annotations;
    035        private final int numAnnotations;
    036
    037        public ParameterAnnotation(final Annotation[] annotations) {
    038            this.numAnnotations = annotations.length;
    039            this.annotations = annotations;
    040        }
    041
    042        public List<Object> getClassFileEntries() {
    043            final List<Object> nested = new ArrayList<>();
    044            for (final Annotation annotation : annotations) {
    045                nested.addAll(annotation.getClassFileEntries());
    046            }
    047            return nested;
    048        }
    049
    050        public int getLength() {
    051            int length = 2;
    052            for (final Annotation annotation : annotations) {
    053                length += annotation.getLength();
    054            }
    055            return length;
    056        }
    057
    058        public void resolve(final ClassConstantPool pool) {
    059            for (final Annotation annotation : annotations) {
    060                annotation.resolve(pool);
    061            }
    062        }
    063
    064        public void writeBody(final DataOutputStream dos) throws IOException {
    065            dos.writeShort(numAnnotations);
    066            for (final Annotation annotation : annotations) {
    067                annotation.writeBody(dos);
    068            }
    069        }
    070
    071    }
    072
    073    private final int numParameters;
    074
    075    private final ParameterAnnotation[] parameterAnnotations;
    076
    077    public RuntimeVisibleorInvisibleParameterAnnotationsAttribute(final CPUTF8 name, final ParameterAnnotation[] parameterAnnotations) {
    078        super(name);
    079        this.numParameters = parameterAnnotations.length;
    080        this.parameterAnnotations = parameterAnnotations;
    081    }
    082
    083    @Override
    084    protected int getLength() {
    085        int length = 1;
    086        for (int i = 0; i < numParameters; i++) {
    087            length += parameterAnnotations[i].getLength();
    088        }
    089        return length;
    090    }
    091
    092    @Override
    093    protected ClassFileEntry[] getNestedClassFileEntries() {
    094        final List<Object> nested = new ArrayList<>();
    095        nested.add(attributeName);
    096        for (final ParameterAnnotation parameterAnnotation : parameterAnnotations) {
    097            nested.addAll(parameterAnnotation.getClassFileEntries());
    098        }
    099        return nested.toArray(ClassFileEntry.NONE);
    100    }
    101
    102    @Override
    103    protected void resolve(final ClassConstantPool pool) {
    104        super.resolve(pool);
    105        for (final ParameterAnnotation parameterAnnotation : parameterAnnotations) {
    106            parameterAnnotation.resolve(pool);
    107        }
    108    }
    109
    110    @Override
    111    public String toString() {
    112        return attributeName.underlyingString() + ": " + numParameters + " parameter annotations";
    113    }
    114
    115    @Override
    116    protected void writeBody(final DataOutputStream dos) throws IOException {
    117        dos.writeByte(numParameters);
    118        for (int i = 0; i < numParameters; i++) {
    119            parameterAnnotations[i].writeBody(dos);
    120        }
    121    }
    122
    123}