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