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https://issues.apache.org/jira/browse/LANG-1648?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18039591#comment-18039591
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Gary D. Gregory edited comment on LANG-1648 at 11/20/25 11:28 AM:
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[~eballetbaz]
Thank you for the information. I have set this ticket to 'resolved' for 3.13.0
and will update changes.xml. See also [LANG-1694].
was (Author: garydgregory):
[~eballetbaz]
Thank you for the information. I have set this ticket to 'resolved' for 3.13.0
and will update changes.xml.
> MethodUtils.getAnnotation fails with "Found multiple candidates for method
> ..."
> -------------------------------------------------------------------------------
>
> Key: LANG-1648
> URL: https://issues.apache.org/jira/browse/LANG-1648
> Project: Commons Lang
> Issue Type: Bug
> Components: lang.*
> Affects Versions: 3.12.0
> Reporter: Michele Preti
> Priority: Major
> Fix For: 3.13.0
>
>
> I will use jackson {{ObjectMapper}} as an example, but this will happen on
> any class with multiple "candidates" methods (no exact matches)
> {code:java}
> import com.fasterxml.jackson.core.JsonGenerator;
> import com.fasterxml.jackson.databind.JsonNode;
> import com.fasterxml.jackson.databind.ObjectMapper;
> Method method = ObjectMapper.class.getDeclaredMethod("writeTree",
> new Class<?>[] {JsonGenerator.class, JsonNode.class});
> MethodUtils.getAnnotation(method, NonNull.class, true, true);
> {code}
> will fail with
> {code:java}
> Exception in thread "main" java.lang.IllegalStateException: Found multiple
> candidates for method writeTree(class
> com.fasterxml.jackson.core.JsonGenerator,class
> com.fasterxml.jackson.databind.JsonNode) on class
> com.fasterxml.jackson.core.ObjectCodec : [public abstract void
> com.fasterxml.jackson.core.ObjectCodec.writeTree(com.fasterxml.jackson.core.JsonGenerator,com.fasterxml.jackson.core.TreeNode)
> throws java.io.IOException,public abstract void
> com.fasterxml.jackson.core.TreeCodec.writeTree(com.fasterxml.jackson.core.JsonGenerator,com.fasterxml.jackson.core.TreeNode)
> throws
> java.io.IOException,com.fasterxml.jackson.core.JsonProcessingException]Exception
> in thread "main" java.lang.IllegalStateException: Found multiple candidates
> for method writeTree(class com.fasterxml.jackson.core.JsonGenerator,class
> com.fasterxml.jackson.databind.JsonNode) on class
> com.fasterxml.jackson.core.ObjectCodec : [public abstract void
> com.fasterxml.jackson.core.ObjectCodec.writeTree(com.fasterxml.jackson.core.JsonGenerator,com.fasterxml.jackson.core.TreeNode)
> throws java.io.IOException,public abstract void
> com.fasterxml.jackson.core.TreeCodec.writeTree(com.fasterxml.jackson.core.JsonGenerator,com.fasterxml.jackson.core.TreeNode)
> throws
> java.io.IOException,com.fasterxml.jackson.core.JsonProcessingException]
> at
> org.apache.commons.lang3.reflect.MethodUtils.getMatchingMethod(MethodUtils.java:784)
>
> at
> org.apache.commons.lang3.reflect.MethodUtils.getAnnotation(MethodUtils.java:988)
> ...{code}
> The problem is that {{getAnnotation()}} is using {{getMatchingMethod()}} to
> search for any overriden method in the superclasses
> {{getMatchingMethod()}} will not return overriden methods in superclass, but
> any similar method: same name and with {{isAssignable()}} parameters.
> {{getMatchingMethod()}} in itself is correct, even if a
> {{getMatchingMethod*s*()}} that could return multiple matchng methods might
> be usefull
> but {{getAnnotation()}} should not use it, instead it should simply use
> {code:java}
> acls.getDeclaredMethod(method.getName(), method.getParameterTypes())
> {code}
> or {{getMethod()}}
> because it is only interested in overridden methods (same name and exactly
> same parameters)
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