package org.hibernate.intercept;
import org.hibernate.engine.SessionImplementor;
import org.hibernate.LazyInitializationException;
import java.util.Set;
import java.io.Serializable;
/**
* @author Steve Ebersole
*/
public abstract class AbstractFieldInterceptor implements FieldInterceptor, Serializable {
private transient SessionImplementor session;
private Set uninitializedFields;
private final String entityName;
private transient boolean initializing;
private boolean dirty;
protected AbstractFieldInterceptor(SessionImplementor session, Set uninitializedFields, String entityName) {
this.session = session;
this.uninitializedFields = uninitializedFields;
this.entityName = entityName;
}
// FieldInterceptor impl ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
public final void setSession(SessionImplementor session) {
this.session = session;
}
public final boolean isInitialized() {
return uninitializedFields == null || uninitializedFields.size() == 0;
}
public final boolean isInitialized(String field) {
return uninitializedFields == null || !uninitializedFields.contains( field );
}
public final void dirty() {
dirty = true;
}
public final boolean isDirty() {
return dirty;
}
public final void clearDirty() {
dirty = false;
}
// subclass accesses ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
protected final Object intercept(Object target, String fieldName, Object value) {
if ( initializing ) {
return value;
}
if ( uninitializedFields != null && uninitializedFields.contains( fieldName ) ) {
if ( session == null ) {
throw new LazyInitializationException( "entity with lazy properties is not associated with a session" );
}
else if ( !session.isOpen() || !session.isConnected() ) {
throw new LazyInitializationException( "session is not connected" );
}
final Object result;
initializing = true;
try {
result = ( ( LazyPropertyInitializer ) session.getFactory()
.getEntityPersister( entityName ) )
.initializeLazyProperty( fieldName, target, session );
}
finally {
initializing = false;
}
uninitializedFields = null; //let's assume that there is only one lazy fetch group, for now!
return result;
}
else {
return value;
}
}
public final SessionImplementor getSession() {
return session;
}
public final Set getUninitializedFields() {
return uninitializedFields;
}
public final String getEntityName() {
return entityName;
}
public final boolean isInitializing() {
return initializing;
}
}
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