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