Package org.teiid.translator.mongodb

Class MongoDBSelectVisitor

java.lang.Object

org.teiid.language.visitor.AbstractLanguageVisitor

org.teiid.language.visitor.HierarchyVisitor

org.teiid.translator.mongodb.MongoDBSelectVisitor

All Implemented Interfaces:

LanguageObjectVisitor

Direct Known Subclasses:

MongoDBUpdateVisitor

public class MongoDBSelectVisitor
extends HierarchyVisitor

Field Summary

Fields

Modifier and Type	Field	Description
protected ArrayList<TranslatorException>	exceptions
protected MongoDBExecutionFactory	executionFactory
protected ConcurrentHashMap<Object,org.teiid.translator.mongodb.ColumnDetail>	expressionMap
protected com.mongodb.BasicDBObject	group
protected com.mongodb.DBObject	having
protected LinkedList<org.teiid.translator.mongodb.MongoDocument>	joinedDocuments
protected Integer	limit
protected com.mongodb.DBObject	match
protected MergePlanner	mergePlanner
protected RuntimeMetadata	metadata
protected org.teiid.translator.mongodb.MongoDocument	mongoDoc
protected Stack<Object>	onGoingExpression
protected ArrayList<Condition>	pendingConditions
protected com.mongodb.BasicDBObject	project
protected boolean	projectBeforeMatch
protected ArrayList<String>	selectColumnReferences
protected ArrayList<String>	selectColumns
protected Integer	skip
protected com.mongodb.DBObject	sort

Constructor Summary

Constructors

Constructor	Description
MongoDBSelectVisitor(MongoDBExecutionFactory executionFactory, RuntimeMetadata metadata)

Method Summary

Modifier and Type	Method	Description
protected void	append(List<? extends LanguageObject> items)	Simple utility to append a list of language objects to the current buffer by creating a comma-separated list.
void	append(LanguageObject obj)	Appends the string form of the LanguageObject to the current buffer.
protected void	append(LanguageObject[] items)	Simple utility to append an array of language objects to the current buffer by creating a comma-separated list.
protected void	buildComparisionQuery(Comparison obj, Object rightExpr, com.mongodb.QueryBuilder query)
protected com.mongodb.BasicDBObject	buildFunctionQuery(Comparison obj, com.mongodb.BasicDBObject leftExpr, Object rightExpr)
protected com.mongodb.QueryBuilder	buildInQuery(In obj, com.mongodb.QueryBuilder query)
protected com.mongodb.QueryBuilder	buildIsNullQuery(IsNull obj, com.mongodb.QueryBuilder query)
protected com.mongodb.QueryBuilder	buildLikeQuery(Like obj, com.mongodb.QueryBuilder query)
String	getColumnName(ColumnReference obj)
void	visit(AggregateFunction obj)
void	visit(AndOr obj)
void	visit(Array array)
void	visit(ColumnReference obj)
void	visit(Comparison obj)
void	visit(DerivedColumn obj)
void	visit(Function obj)
void	visit(GroupBy obj)
void	visit(In obj)
void	visit(IsNull obj)
void	visit(Join obj)
void	visit(Like obj)
void	visit(Limit obj)
void	visit(Literal obj)
void	visit(NamedTable obj)
void	visit(OrderBy obj)
void	visit(Select obj)
void	visit(SortSpecification obj)

Methods inherited from class org.teiid.language.visitor.HierarchyVisitor

visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit, visit

Methods inherited from class org.teiid.language.visitor.AbstractLanguageVisitor

visit, visit, visit, visitNode, visitNodes, visitNodes

Methods inherited from class java.lang.Object

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

Field Detail

executionFactory

protected MongoDBExecutionFactory executionFactory

metadata

protected RuntimeMetadata metadata

exceptions

protected ArrayList<TranslatorException> exceptions

onGoingExpression

protected Stack<Object> onGoingExpression

expressionMap

protected ConcurrentHashMap<Object,org.teiid.translator.mongodb.ColumnDetail> expressionMap

mongoDoc

protected org.teiid.translator.mongodb.MongoDocument mongoDoc

project

protected com.mongodb.BasicDBObject project

limit

protected Integer limit

skip

protected Integer skip

sort

protected com.mongodb.DBObject sort

match

protected com.mongodb.DBObject match

having

protected com.mongodb.DBObject having

group

protected com.mongodb.BasicDBObject group

selectColumns

protected ArrayList<String> selectColumns

selectColumnReferences

protected ArrayList<String> selectColumnReferences

projectBeforeMatch

protected boolean projectBeforeMatch

mergePlanner

protected MergePlanner mergePlanner

pendingConditions

protected ArrayList<Condition> pendingConditions

joinedDocuments

protected LinkedList<org.teiid.translator.mongodb.MongoDocument> joinedDocuments

Constructor Detail

MongoDBSelectVisitor

public MongoDBSelectVisitor(MongoDBExecutionFactory executionFactory,
                            RuntimeMetadata metadata)

Method Detail

append

public void append(LanguageObject obj)

Appends the string form of the LanguageObject to the current buffer.

Parameters:

obj - the language object instance

append

protected void append(List<? extends LanguageObject> items)

Simple utility to append a list of language objects to the current buffer by creating a comma-separated list.

Parameters:

items - a list of LanguageObjects

append

protected void append(LanguageObject[] items)

Simple utility to append an array of language objects to the current buffer by creating a comma-separated list.

Parameters:

items - an array of LanguageObjects

getColumnName

public String getColumnName(ColumnReference obj)

visit

public void visit(DerivedColumn obj)

Specified by:

visit in interface LanguageObjectVisitor

Overrides:

visit in class HierarchyVisitor

visit

public void visit(ColumnReference obj)

Specified by:

visit in interface LanguageObjectVisitor

Overrides:

visit in class AbstractLanguageVisitor

visit

public void visit(AggregateFunction obj)

Specified by:

visit in interface LanguageObjectVisitor

Overrides:

visit in class HierarchyVisitor

visit

public void visit(Function obj)

Specified by:

visit in interface LanguageObjectVisitor

Overrides:

visit in class HierarchyVisitor

visit

public void visit(NamedTable obj)

Specified by:

visit in interface LanguageObjectVisitor

Overrides:

visit in class AbstractLanguageVisitor

visit

public void visit(Join obj)

Specified by:

visit in interface LanguageObjectVisitor

Overrides:

visit in class HierarchyVisitor

visit

public void visit(Select obj)

Specified by:

visit in interface LanguageObjectVisitor

Overrides:

visit in class HierarchyVisitor

visit

public void visit(Comparison obj)

Specified by:

visit in interface LanguageObjectVisitor

Overrides:

visit in class HierarchyVisitor

buildFunctionQuery

protected com.mongodb.BasicDBObject buildFunctionQuery(Comparison obj,
                                                       com.mongodb.BasicDBObject leftExpr,
                                                       Object rightExpr)

buildComparisionQuery

protected void buildComparisionQuery(Comparison obj,
                                     Object rightExpr,
                                     com.mongodb.QueryBuilder query)

visit

public void visit(AndOr obj)

Specified by:

visit in interface LanguageObjectVisitor

Overrides:

visit in class HierarchyVisitor

visit

public void visit(Array array)

Specified by:

visit in interface LanguageObjectVisitor

Overrides:

visit in class HierarchyVisitor

visit

public void visit(Literal obj)

Specified by:

visit in interface LanguageObjectVisitor

Overrides:

visit in class AbstractLanguageVisitor

visit

public void visit(In obj)

Specified by:

visit in interface LanguageObjectVisitor

Overrides:

visit in class HierarchyVisitor

buildInQuery

protected com.mongodb.QueryBuilder buildInQuery(In obj,
                                                com.mongodb.QueryBuilder query)

visit

public void visit(IsNull obj)

Specified by:

visit in interface LanguageObjectVisitor

Overrides:

visit in class HierarchyVisitor

buildIsNullQuery

protected com.mongodb.QueryBuilder buildIsNullQuery(IsNull obj,
                                                    com.mongodb.QueryBuilder query)

visit

public void visit(Like obj)

Specified by:

visit in interface LanguageObjectVisitor

Overrides:

visit in class HierarchyVisitor

buildLikeQuery

protected com.mongodb.QueryBuilder buildLikeQuery(Like obj,
                                                  com.mongodb.QueryBuilder query)

visit

public void visit(Limit obj)

Specified by:

visit in interface LanguageObjectVisitor

Overrides:

visit in class AbstractLanguageVisitor

visit

public void visit(OrderBy obj)

Specified by:

visit in interface LanguageObjectVisitor

Overrides:

visit in class HierarchyVisitor

visit

public void visit(SortSpecification obj)

Specified by:

visit in interface LanguageObjectVisitor

Overrides:

visit in class HierarchyVisitor

visit

public void visit(GroupBy obj)

Specified by:

visit in interface LanguageObjectVisitor

Overrides:

visit in class HierarchyVisitor