Raccoon.QE
Class QueryEngine

java.lang.Object
  Raccoon.QE.QueryEngine

Direct Known Subclasses:

SimQueryEngine

public class QueryEngine

extends java.lang.Object

Author:

Qi Zhong

Field Summary

NetModuleImpl	netModule
ParseHelper	ph
ResourceManager	rm
parser	sqlParser

Constructor Summary

QueryEngine()

Method Summary

QueryAnswer	doLocalQuery(QueryCriteria qc)
QueryAnswer	doQuery(PVNode pvNode, java.lang.String inputSQL, boolean isExtendQuery)
PVInstance	executeSFW(java.lang.String nodeName, java.lang.String sqlStmt)
java.util.HashMap	filter(java.util.HashMap attrMappingHashTable, java.lang.String nodeName)
int	GetAttrType(java.lang.String nodeName, java.lang.String relName, java.lang.String attrName) get the type of attribute.
ResourceManager	getResourceManager()
void	initParser()
java.util.HashSet	intersect(java.util.HashSet setA, java.util.HashSet setB)
boolean	isAttrExist(java.lang.String nodeName, java.lang.String relName, java.lang.String attrName)
boolean	isLocalQuery(java.lang.String localNodeName, java.util.Vector nodeArr)
boolean	isRelExist(java.lang.String nodename, java.lang.String relname)
java.util.Vector	searchCandidateTable(java.lang.String localNodeName, java.util.Vector attrArr, java.util.HashMap attrMappingHashTable)
void	setNetModule(NetModuleImpl newNetModule)
void	setResourceManager(ResourceManager newRM)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

netModule

public NetModuleImpl netModule

rm

public ResourceManager rm

sqlParser

public parser sqlParser

ph

public ParseHelper ph

Constructor Detail

QueryEngine

public QueryEngine()

Method Detail

initParser

public void initParser()

setNetModule

public void setNetModule(NetModuleImpl newNetModule)

setResourceManager

public void setResourceManager(ResourceManager newRM)

getResourceManager

public ResourceManager getResourceManager()

doQuery

public QueryAnswer doQuery(PVNode pvNode,
                           java.lang.String inputSQL,
                           boolean isExtendQuery)
                    throws java.sql.SQLException,
                           PVException

Returns:

QE.QueryAnswer

Throws:

java.sql.SQLException

PVException

isLocalQuery

public boolean isLocalQuery(java.lang.String localNodeName,
                            java.util.Vector nodeArr)

searchCandidateTable

public java.util.Vector searchCandidateTable(java.lang.String localNodeName,
                                             java.util.Vector attrArr,
                                             java.util.HashMap attrMappingHashTable)

intersect

public java.util.HashSet intersect(java.util.HashSet setA,
                                   java.util.HashSet setB)

filter

public java.util.HashMap filter(java.util.HashMap attrMappingHashTable,
                                java.lang.String nodeName)

doLocalQuery

public QueryAnswer doLocalQuery(QueryCriteria qc)
                         throws java.sql.SQLException

Throws:

java.sql.SQLException

isRelExist

public boolean isRelExist(java.lang.String nodename,
                          java.lang.String relname)
                   throws PVException

Throws:

PVException

executeSFW

public PVInstance executeSFW(java.lang.String nodeName,
                             java.lang.String sqlStmt)
                      throws java.sql.SQLException,
                             PVException

Throws:

java.sql.SQLException

PVException

isAttrExist

public boolean isAttrExist(java.lang.String nodeName,
                           java.lang.String relName,
                           java.lang.String attrName)
                    throws PVException

Throws:

PVException

GetAttrType

public int GetAttrType(java.lang.String nodeName,
                       java.lang.String relName,
                       java.lang.String attrName)
                throws PVException

get the type of attribute. We'll use the information sored in the Schema in each node and then convert the typeName into enum type

Throws:

PVException