From 3e207615acea3f9ddce05e6874e43ca8baaf7aca Mon Sep 17 00:00:00 2001
From: Volker Berlin <volker.berlin@googlemail.com>
Date: Wed, 30 May 2018 18:31:17 +0200
Subject: [PATCH] add method getAnnotation
---
.../inetsoftware/classparser/MethodInfo.java | 34 ++++++++++++++++---
1 file changed, 30 insertions(+), 4 deletions(-)
diff --git a/src/de/inetsoftware/classparser/MethodInfo.java b/src/de/inetsoftware/classparser/MethodInfo.java
index 54462fe..a745f87 100644
--- a/src/de/inetsoftware/classparser/MethodInfo.java
+++ b/src/de/inetsoftware/classparser/MethodInfo.java
@@ -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;
}