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