/*
* *************************************************************************************
* Copyright (C) 2008 EsperTech, Inc. All rights reserved. *
* http://esper.codehaus.org *
* 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.core.context.mgr;
import com.espertech.esper.client.EventType;
import com.espertech.esper.core.context.stmt.AIRegistryAggregationMultiPerm;
import com.espertech.esper.core.context.stmt.AIRegistryExprMultiPerm;
import com.espertech.esper.core.context.stmt.StatementAIResourceRegistry;
import com.espertech.esper.core.context.stmt.StatementAIResourceRegistryFactory;
import com.espertech.esper.epl.expression.ExprValidationException;
import com.espertech.esper.epl.spec.ContextDetail;
import com.espertech.esper.epl.spec.ContextDetailCategory;
import com.espertech.esper.epl.spec.ContextDetailCategoryItem;
import com.espertech.esper.epl.spec.ContextDetailPartitionItem;
import com.espertech.esper.epl.spec.util.StatementSpecCompiledAnalyzer;
import com.espertech.esper.epl.spec.util.StatementSpecCompiledAnalyzerResult;
import com.espertech.esper.event.EventTypeUtility;
import com.espertech.esper.filter.FilterSpecCompiled;
import com.espertech.esper.filter.FilterSpecLookupable;
import com.espertech.esper.filter.FilterValueSetParam;
import java.util.*;
public class ContextControllerCategoryFactory extends ContextControllerFactoryBase implements ContextControllerFactory {
private final ContextDetailCategory categorySpec;
private final List<FilterSpecCompiled> filtersSpecsNestedContexts;
private Map<String, Object> contextBuiltinProps;
public ContextControllerCategoryFactory(ContextControllerFactoryContext factoryContext, ContextDetailCategory categorySpec, List<FilterSpecCompiled> filtersSpecsNestedContexts) {
super(factoryContext);
this.categorySpec = categorySpec;
this.filtersSpecsNestedContexts = filtersSpecsNestedContexts;
}
public boolean hasFiltersSpecsNestedContexts() {
return filtersSpecsNestedContexts != null && !filtersSpecsNestedContexts.isEmpty();
}
public void validateFactory() throws ExprValidationException {
if (categorySpec.getItems().isEmpty()) {
throw new ExprValidationException("Empty list of partition items");
}
contextBuiltinProps = ContextPropertyEventType.getCategorizedType();
}
public ContextControllerStatementCtxCache validateStatement(ContextControllerStatementBase statement) throws ExprValidationException {
StatementSpecCompiledAnalyzerResult streamAnalysis = StatementSpecCompiledAnalyzer.analyzeFilters(statement.getStatementSpec());
validateStatementForContext(statement, streamAnalysis);
return new ContextControllerStatementCtxCacheFilters(streamAnalysis.getFilters());
}
public void populateFilterAddendums(IdentityHashMap<FilterSpecCompiled, List<FilterValueSetParam>> filterAddendum, ContextControllerStatementDesc statement, Object categoryLabel, int contextId) {
ContextControllerStatementCtxCacheFilters statementInfo = (ContextControllerStatementCtxCacheFilters) statement.getCaches()[factoryContext.getNestingLevel() - 1];
ContextDetailCategoryItem category = findCategoryForName((String) categoryLabel);
getAddendumFilters(filterAddendum, category, categorySpec, statementInfo.getFilterSpecs(), statement);
}
public void populateContextInternalFilterAddendums(ContextInternalFilterAddendum filterAddendum, Object categoryLabel) {
ContextDetailCategoryItem category = findCategoryForName((String) categoryLabel);
getAddendumFilters(filterAddendum.getFilterAddendum(), category, categorySpec, filtersSpecsNestedContexts, null);
}
public FilterSpecLookupable getFilterLookupable(EventType eventType) {
return null;
}
public boolean isSingleInstanceContext() {
return false;
}
public StatementAIResourceRegistryFactory getStatementAIResourceRegistryFactory() {
return new StatementAIResourceRegistryFactory() {
public StatementAIResourceRegistry make() {
return new StatementAIResourceRegistry(new AIRegistryAggregationMultiPerm(), new AIRegistryExprMultiPerm());
}
};
}
public List<ContextDetailPartitionItem> getContextDetailPartitionItems() {
return Collections.emptyList();
}
public ContextDetail getContextDetail() {
return categorySpec;
}
public ContextDetailCategory getCategorySpec() {
return categorySpec;
}
public Map<String, Object> getContextBuiltinProps() {
return contextBuiltinProps;
}
public ContextController createNoCallback(int pathId, ContextControllerLifecycleCallback callback) {
return new ContextControllerCategory(pathId, callback, this);
}
private void validateStatementForContext(ContextControllerStatementBase statement, StatementSpecCompiledAnalyzerResult streamAnalysis)
throws ExprValidationException
{
List<FilterSpecCompiled> filters = streamAnalysis.getFilters();
boolean isCreateWindow = statement.getStatementSpec().getCreateWindowDesc() != null;
String message = "Category context '" + factoryContext.getContextName() + "' requires that any of the events types that are listed in the category context also appear in any of the filter expressions of the statement";
// if no create-window: at least one of the filters must match one of the filters specified by the context
if (!isCreateWindow) {
for (FilterSpecCompiled filter : filters) {
EventType stmtFilterType = filter.getFilterForEventType();
EventType contextType = categorySpec.getFilterSpecCompiled().getFilterForEventType();
if (stmtFilterType == contextType) {
return;
}
if (EventTypeUtility.isTypeOrSubTypeOf(stmtFilterType, contextType)) {
return;
}
}
if (!filters.isEmpty()) {
throw new ExprValidationException(message);
}
return;
}
// validate create-window
String declaredAsName = statement.getStatementSpec().getCreateWindowDesc().getAsEventTypeName();
if (declaredAsName != null) {
if (categorySpec.getFilterSpecCompiled().getFilterForEventType().getName().equals(declaredAsName)) {
return;
}
throw new ExprValidationException(message);
}
}
// Compare filters in statement with filters in segmented context, addendum filter compilation
private static void getAddendumFilters(IdentityHashMap<FilterSpecCompiled, List<FilterValueSetParam>> addendums,
ContextDetailCategoryItem category,
ContextDetailCategory categorySpec,
List<FilterSpecCompiled> filters,
ContextControllerStatementDesc statement) {
// determine whether create-named-window
boolean isCreateWindow = statement != null && statement.getStatement().getStatementSpec().getCreateWindowDesc() != null;
if (!isCreateWindow) {
for (FilterSpecCompiled filtersSpec : filters) {
boolean typeOrSubtype = EventTypeUtility.isTypeOrSubTypeOf(filtersSpec.getFilterForEventType(), categorySpec.getFilterSpecCompiled().getFilterForEventType());
if (!typeOrSubtype) {
continue; // does not apply
}
List<FilterValueSetParam> addendumFilters = new ArrayList<FilterValueSetParam>();
addendumFilters.addAll(category.getCompiledFilterParam());
addendumFilters.addAll(categorySpec.getFilterParamsCompiled());
List<FilterValueSetParam> existing = addendums.get(filtersSpec);
if (existing == null) {
addendums.put(filtersSpec, addendumFilters);
}
else {
existing.addAll(addendumFilters);
}
}
}
// handle segmented context for create-window
else {
String declaredAsName = statement.getStatement().getStatementSpec().getCreateWindowDesc().getAsEventTypeName();
if (declaredAsName != null) {
for (FilterSpecCompiled filtersSpec : filters) {
List<FilterValueSetParam> addendumFilters = new ArrayList<FilterValueSetParam>();
addendumFilters.addAll(category.getCompiledFilterParam());
addendumFilters.addAll(categorySpec.getFilterParamsCompiled());
List<FilterValueSetParam> existing = addendums.get(filtersSpec);
if (existing == null) {
addendums.put(filtersSpec, addendumFilters);
}
else {
existing.addAll(addendumFilters);
}
}
}
}
}
private ContextDetailCategoryItem findCategoryForName(String categoryLabel) {
for (ContextDetailCategoryItem item : categorySpec.getItems()) {
if (item.getName().equals(categoryLabel)) {
return item;
}
}
throw new IllegalStateException("Failed to find category '" + categoryLabel + "'");
}
}