    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}