Programatically Set/Get the metadata of an Asset: Adobe CQ5/Adobe AEM

Programatically Set/Get the metadata of an Asset: Adobe CQ5/Adobe AEM

The Adobe Experience Manager(AEM) version referred here is 5.6.1

@Reference
private ResourceResolverFactory resolverFactory;

ResourceResolver resourceResolver =null;
try
{
String resourcePath = "/content/dam/geometrixx-outdoors/banners/adventure.jpg";
resourceResolver= resolverFactory.getAdministrativeResourceResolver(null);
   Resource res = resourceResolver.getResource(resourcePath);
   
   Resource metadataRes =res.getChild("jcr:content/metadata");
   ModifiableValueMap map = metadataRes.adaptTo(ModifiableValueMap.class);
     
   //set metadata
   map.put("dc:samplemetadata", "sample metadata");
   resourceResolver.commit();
     
   //get metadata  
   String metadata=map.get("dc:samplemetadata").toString();  
     
}catch(Exception e)
{

}finally
{
resourceResolver.close();
}

Dependency in pom.xml

<dependency>
<groupId>org.apache.sling</groupId>
<artifactId>org.apache.sling.api</artifactId>
<version>2.4.0</version>
<scope>provided</scope>
</dependency>