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title: EntityResolver
url: /docs/1.2/entityresolver.html
layout: docs_legacy
---
<P>In runtime the mapping metadata is accessed via a <A href="datachannel.html" title="DataChannel">DataChannel</A> in a form of <TT>org.objectstyle.cayenne.map.EntityResolver</TT> (EntityResolver available via ObjectContext is usually obtained from the channel behind the scenes). EntityResolver provides a single namespace for multiple DataMaps. </P>
<P>Another important function of the EntityResolver is providing access to the <TT>org.objectstyle.cayenne.property.ClassDescriptor</TT> instances for each persistent entity. Those a compiled by Cayenne on the fly using EntityResolver's <TT>org.objectstyle.cayenne.property.ClassDescriptorFactory</TT>.</P>