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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package org.apache.bcel.classfile;
import java.io.DataInput;
import java.io.DataOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.apache.bcel.Const;
/**
* represents one annotation in the annotation table
*
* @version $Id: AnnotationEntry
* @since 6.0
*/
public class AnnotationEntry implements Node {
private final int type_index;
private final ConstantPool constant_pool;
private final boolean isRuntimeVisible;
private List<ElementValuePair> element_value_pairs;
/*
* Factory method to create an AnnotionEntry from a DataInput
*
* @param input
* @param constant_pool
* @param isRuntimeVisible
* @return the entry
* @throws IOException
*/
public static AnnotationEntry read(final DataInput input, final ConstantPool constant_pool, final boolean isRuntimeVisible) throws IOException {
final AnnotationEntry annotationEntry = new AnnotationEntry(input.readUnsignedShort(), constant_pool, isRuntimeVisible);
final int num_element_value_pairs = input.readUnsignedShort();
annotationEntry.element_value_pairs = new ArrayList<>();
for (int i = 0; i < num_element_value_pairs; i++) {
annotationEntry.element_value_pairs.add(
new ElementValuePair(input.readUnsignedShort(), ElementValue.readElementValue(input, constant_pool),
constant_pool));
}
return annotationEntry;
}
public AnnotationEntry(final int type_index, final ConstantPool constant_pool, final boolean isRuntimeVisible) {
this.type_index = type_index;
this.constant_pool = constant_pool;
this.isRuntimeVisible = isRuntimeVisible;
}
public int getTypeIndex() {
return type_index;
}
public ConstantPool getConstantPool() {
return constant_pool;
}
public boolean isRuntimeVisible() {
return isRuntimeVisible;
}
/**
* Called by objects that are traversing the nodes of the tree implicitely defined by the contents of a Java class.
* I.e., the hierarchy of methods, fields, attributes, etc. spawns a tree of objects.
*
* @param v Visitor object
*/
@Override
public void accept(final Visitor v) {
v.visitAnnotationEntry(this);
}
/**
* @return the annotation type name
*/
public String getAnnotationType() {
final ConstantUtf8 c = (ConstantUtf8) constant_pool.getConstant(type_index, Const.CONSTANT_Utf8);
return c.getBytes();
}
/**
* @return the annotation type index
*/
public int getAnnotationTypeIndex() {
return type_index;
}
/**
* @return the number of element value pairs in this annotation entry
*/
public final int getNumElementValuePairs() {
return element_value_pairs.size();
}
/**
* @return the element value pairs in this annotation entry
*/
public ElementValuePair[] getElementValuePairs() {
// TODO return List
return element_value_pairs.toArray(new ElementValuePair[element_value_pairs.size()]);
}
public void dump(final DataOutputStream dos) throws IOException {
dos.writeShort(type_index); // u2 index of type name in cpool
dos.writeShort(element_value_pairs.size()); // u2 element_value pair
// count
for (final ElementValuePair envp : element_value_pairs) {
envp.dump(dos);
}
}
public void addElementNameValuePair(final ElementValuePair elementNameValuePair) {
element_value_pairs.add(elementNameValuePair);
}
public String toShortString() {
final StringBuilder result = new StringBuilder();
result.append("@");
result.append(getAnnotationType());
final ElementValuePair[] evPairs = getElementValuePairs();
if (evPairs.length > 0) {
result.append("(");
for (final ElementValuePair element : evPairs) {
result.append(element.toShortString());
}
result.append(")");
}
return result.toString();
}
@Override
public String toString() {
return toShortString();
}
public static AnnotationEntry[] createAnnotationEntries(final Attribute[] attrs) {
// Find attributes that contain annotation data
final List<AnnotationEntry> accumulatedAnnotations = new ArrayList<>(attrs.length);
for (final Attribute attribute : attrs) {
if (attribute instanceof Annotations) {
final Annotations runtimeAnnotations = (Annotations) attribute;
Collections.addAll(accumulatedAnnotations, runtimeAnnotations.getAnnotationEntries());
}
}
return accumulatedAnnotations.toArray(new AnnotationEntry[accumulatedAnnotations.size()]);
}
}
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