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add method getAnnotation

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This commit is contained in:
Volker Berlin 2018-05-30 18:31:17 +02:00
parent d06899b669
commit 3e207615ac
1 changed files with 30 additions and 4 deletions
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34
src/de/inetsoftware/classparser/MethodInfo.java
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@ -1,5 +1,5 @@
/*
Copyright 2011 - 2017 Volker Berlin (i-net software)
Copyright 2011 - 2018 Volker Berlin (i-net software)
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
@ -18,6 +18,9 @@ package de.inetsoftware.classparser;
import java.io.DataInputStream;
import java.io.IOException;
import java.util.Map;
import javax.annotation.Nullable;
import de.inetsoftware.classparser.Attributes.AttributeInfo;
@ -42,6 +45,8 @@ public class MethodInfo {
private ClassFile classFile;
private Annotations annotations;
/**
* Read the method_info structure
* http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html#jvms-4.6
@ -152,10 +157,31 @@ public class MethodInfo {
* Get the annotations with @Retention(RetentionPolicy.CLASS)
* @return the annotations if there any exists else null
*/
@Nullable
public Annotations getRuntimeInvisibleAnnotations() throws IOException {
AttributeInfo data = attributes.get( "RuntimeInvisibleAnnotations" );
if( data != null ) {
return new Annotations( data.getDataInputStream(), constantPool );
if( annotations == null ) {
AttributeInfo data = attributes.get( "RuntimeInvisibleAnnotations" );
if( data != null ) {
annotations = new Annotations( data.getDataInputStream(), constantPool );
}
}
return annotations;
}
/**
* Get a single annotation or null
*
* @param annotation
* the class name of the annotation
* @return the value or null if not exists
* @throws IOException
* if any I/O error occur
*/
@Nullable
public Map<String, Object> getAnnotation( String annotation ) throws IOException {
Annotations annotations = getRuntimeInvisibleAnnotations();
if( annotations != null ) {
return annotations.get( annotation );
}
return null;
}