/*
***************************************************************************************
* Copyright (C) 2006 EsperTech, Inc. All rights reserved. *
* http://www.espertech.com/esper *
* http://www.espertech.com *
* ---------------------------------------------------------------------------------- *
* The software in this package is published under the terms of the GPL license *
* a copy of which has been included with this distribution in the license.txt file. *
***************************************************************************************
*/
package com.espertech.esper.event.vaevent;
import com.espertech.esper.client.EventType;
import com.espertech.esper.epl.expression.core.ExprValidationException;
import com.espertech.esper.event.EventAdapterService;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
/**
* Base revision processor.
*/
public abstract class VAERevisionProcessorBase implements ValueAddEventProcessor {
/**
* Revision type specification.
*/
protected final RevisionSpec revisionSpec;
/**
* Name of type.
*/
protected final String revisionEventTypeName;
/**
* Revision event type.
*/
protected RevisionEventType revisionEventType;
/**
* For interogating nested properties.
*/
protected EventAdapterService eventAdapterService;
/**
* Map of participating type to descriptor.
*/
protected Map<EventType, RevisionTypeDesc> typeDescriptors;
/**
* Ctor.
*
* @param revisionSpec specification
* @param revisioneventTypeName name of event type
* @param eventAdapterService for nested property handling
*/
protected VAERevisionProcessorBase(RevisionSpec revisionSpec, String revisioneventTypeName, EventAdapterService eventAdapterService) {
this.revisionSpec = revisionSpec;
this.revisionEventTypeName = revisioneventTypeName;
this.eventAdapterService = eventAdapterService;
this.typeDescriptors = new HashMap<EventType, RevisionTypeDesc>();
}
public RevisionEventType getValueAddEventType() {
return revisionEventType;
}
public void validateEventType(EventType eventType) throws ExprValidationException {
if (eventType == revisionSpec.getBaseEventType()) {
return;
}
if (typeDescriptors.containsKey(eventType)) {
return;
}
if (eventType == null) {
throw new ExprValidationException(getMessage());
}
// Check all the supertypes to see if one of the matches the full or delta types
Iterator<EventType> deepSupers = eventType.getDeepSuperTypes();
if (deepSupers == null) {
throw new ExprValidationException(getMessage());
}
EventType type;
for (; deepSupers.hasNext(); ) {
type = deepSupers.next();
if (type == revisionSpec.getBaseEventType()) {
return;
}
if (typeDescriptors.containsKey(type)) {
return;
}
}
throw new ExprValidationException(getMessage());
}
private String getMessage() {
return "Selected event type is not a valid base or delta event type of revision event type '"
+ revisionEventTypeName + "'";
}
public EventAdapterService getEventAdapterService() {
return eventAdapterService;
}
}