    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 *
    017 */
    018package org.apache.bcel.classfile;
    019
    020import java.io.DataInput;
    021import java.io.DataOutputStream;
    022import java.io.IOException;
    023import java.util.ArrayList;
    024import java.util.Collections;
    025import java.util.List;
    026
    027/**
    028 * represents one parameter annotation in the parameter annotation table
    029 *
    030 * @version $Id: ParameterAnnotationEntry
    031 * @since 6.0
    032 */
    033public class ParameterAnnotationEntry implements Node {
    034
    035    private final AnnotationEntry[] annotation_table;
    036
    037
    038    /**
    039     * Construct object from input stream.
    040     *
    041     * @param input Input stream
    042     * @throws IOException
    043     */
    044    ParameterAnnotationEntry(final DataInput input, final ConstantPool constant_pool) throws IOException {
    045        final int annotation_table_length = input.readUnsignedShort();
    046        annotation_table = new AnnotationEntry[annotation_table_length];
    047        for (int i = 0; i < annotation_table_length; i++) {
    048            // TODO isRuntimeVisible
    049            annotation_table[i] = AnnotationEntry.read(input, constant_pool, false);
    050        }
    051    }
    052
    053
    054    /**
    055     * Called by objects that are traversing the nodes of the tree implicitely
    056     * defined by the contents of a Java class. I.e., the hierarchy of methods,
    057     * fields, attributes, etc. spawns a tree of objects.
    058     *
    059     * @param v Visitor object
    060     */
    061    @Override
    062    public void accept( final Visitor v ) {
    063        v.visitParameterAnnotationEntry(this);
    064    }
    065
    066    /**
    067     * returns the array of annotation entries in this annotation
    068     */
    069    public AnnotationEntry[] getAnnotationEntries() {
    070        return annotation_table;
    071    }
    072
    073    public void dump(final DataOutputStream dos) throws IOException {
    074        dos.writeShort(annotation_table.length);
    075        for (final AnnotationEntry entry : annotation_table) {
    076            entry.dump(dos);
    077        }
    078    }
    079
    080  public static ParameterAnnotationEntry[] createParameterAnnotationEntries(final Attribute[] attrs) {
    081      // Find attributes that contain parameter annotation data
    082      final List<ParameterAnnotationEntry> accumulatedAnnotations = new ArrayList<>(attrs.length);
    083      for (final Attribute attribute : attrs) {
    084          if (attribute instanceof ParameterAnnotations) {
    085              final ParameterAnnotations runtimeAnnotations = (ParameterAnnotations)attribute;
    086              Collections.addAll(accumulatedAnnotations, runtimeAnnotations.getParameterAnnotationEntries());
    087          }
    088      }
    089      return accumulatedAnnotations.toArray(new ParameterAnnotationEntry[accumulatedAnnotations.size()]);
    090  }
    091}
    092