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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *      http://www.apache.org/licenses/LICENSE-2.0
10   *
11   *  Unless required by applicable law or agreed to in writing, software
12   *  distributed under the License is distributed on an "AS IS" BASIS,
13   *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   *  See the License for the specific language governing permissions and
15   *  limitations under the License.
16   *
17   */
18  package org.apache.bcel.classfile;
19  
20  import java.io.DataInput;
21  import java.io.DataOutputStream;
22  import java.io.IOException;
23  import java.util.ArrayList;
24  import java.util.Collections;
25  import java.util.List;
26  
27  /**
28   * represents one parameter annotation in the parameter annotation table
29   *
30   * @version $Id: ParameterAnnotationEntry
31   * @since 6.0
32   */
33  public class ParameterAnnotationEntry implements Node {
34  
35      private final AnnotationEntry[] annotation_table;
36  
37  
38      /**
39       * Construct object from input stream.
40       *
41       * @param input Input stream
42       * @throws IOException
43       */
44      ParameterAnnotationEntry(final DataInput input, final ConstantPool constant_pool) throws IOException {
45          final int annotation_table_length = input.readUnsignedShort();
46          annotation_table = new AnnotationEntry[annotation_table_length];
47          for (int i = 0; i < annotation_table_length; i++) {
48              // TODO isRuntimeVisible
49              annotation_table[i] = AnnotationEntry.read(input, constant_pool, false);
50          }
51      }
52  
53  
54      /**
55       * Called by objects that are traversing the nodes of the tree implicitely
56       * defined by the contents of a Java class. I.e., the hierarchy of methods,
57       * fields, attributes, etc. spawns a tree of objects.
58       *
59       * @param v Visitor object
60       */
61      @Override
62      public void accept( final Visitor v ) {
63          v.visitParameterAnnotationEntry(this);
64      }
65  
66      /**
67       * returns the array of annotation entries in this annotation
68       */
69      public AnnotationEntry[] getAnnotationEntries() {
70          return annotation_table;
71      }
72  
73      public void dump(final DataOutputStream dos) throws IOException {
74          dos.writeShort(annotation_table.length);
75          for (final AnnotationEntry entry : annotation_table) {
76              entry.dump(dos);
77          }
78      }
79  
80    public static ParameterAnnotationEntry[] createParameterAnnotationEntries(final Attribute[] attrs) {
81        // Find attributes that contain parameter annotation data
82        final List<ParameterAnnotationEntry> accumulatedAnnotations = new ArrayList<>(attrs.length);
83        for (final Attribute attribute : attrs) {
84            if (attribute instanceof ParameterAnnotations) {
85                final ParameterAnnotations runtimeAnnotations = (ParameterAnnotations)attribute;
86                Collections.addAll(accumulatedAnnotations, runtimeAnnotations.getParameterAnnotationEntries());
87            }
88        }
89        return accumulatedAnnotations.toArray(new ParameterAnnotationEntry[accumulatedAnnotations.size()]);
90    }
91  }
92