/*
* *************************************************************************************
* 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.epl.lookup;
import com.espertech.esper.epl.join.plan.QueryGraphValueEntryHashKeyedProp;
import java.util.Collection;
public class SubordPropUtil {
public static boolean isStrictKeyJoin(Collection<SubordPropHashKey> hashKeys) {
for (SubordPropHashKey hashKey : hashKeys) {
if (!(hashKey.getHashKey() instanceof QueryGraphValueEntryHashKeyedProp)) {
return false;
}
}
return true;
}
/**
* Returns the key stream numbers.
* @param descList a list of descriptors
* @return key stream numbers
*/
public static int[] getKeyStreamNums(Collection<SubordPropHashKey> descList)
{
int[] streamIds = new int[descList.size()];
int count = 0;
for (SubordPropHashKey desc : descList)
{
if (!(desc.getHashKey() instanceof QueryGraphValueEntryHashKeyedProp)) {
throw new UnsupportedOperationException("Not a strict key compare");
}
streamIds[count++] = desc.getOptionalKeyStreamNum();
}
return streamIds;
}
/**
* Returns the key property names.
* @param descList a list of descriptors
* @return key property names
*/
public static String[] getKeyProperties(Collection<SubordPropHashKey> descList)
{
String[] result = new String[descList.size()];
int count = 0;
for (SubordPropHashKey desc : descList)
{
if (!(desc.getHashKey() instanceof QueryGraphValueEntryHashKeyedProp)) {
throw new UnsupportedOperationException("Not a strict key compare");
}
QueryGraphValueEntryHashKeyedProp keyed = (QueryGraphValueEntryHashKeyedProp) desc.getHashKey();
result[count++] = keyed.getKeyProperty();
}
return result;
}
/**
* Returns the key property names.
* @param descList a list of descriptors
* @return key property names
*/
public static String[] getKeyProperties(SubordPropHashKey[] descList)
{
String[] result = new String[descList.length];
int count = 0;
for (SubordPropHashKey desc : descList)
{
if (!(desc.getHashKey() instanceof QueryGraphValueEntryHashKeyedProp)) {
throw new UnsupportedOperationException("Not a strict key compare");
}
QueryGraphValueEntryHashKeyedProp keyed = (QueryGraphValueEntryHashKeyedProp) desc.getHashKey();
result[count++] = keyed.getKeyProperty();
}
return result;
}
/**
* Returns the key coercion types.
* @param descList a list of descriptors
* @return key coercion types
*/
public static Class[] getCoercionTypes(Collection<SubordPropHashKey> descList)
{
Class[] result = new Class[descList.size()];
int count = 0;
for (SubordPropHashKey desc : descList)
{
result[count++] = desc.getCoercionType();
}
return result;
}
/**
* Returns the key coercion types.
* @param descList a list of descriptors
* @return key coercion types
*/
public static Class[] getCoercionTypes(SubordPropHashKey[] descList)
{
Class[] result = new Class[descList.length];
int count = 0;
for (SubordPropHashKey desc : descList)
{
result[count++] = desc.getCoercionType();
}
return result;
}
}