org.datanucleus.store.mongodb.query

Class QueryToMongoDBMapper

java.lang.Object

org.datanucleus.query.evaluator.AbstractExpressionEvaluator

org.datanucleus.store.mongodb.query.QueryToMongoDBMapper

All Implemented Interfaces:

org.datanucleus.query.expression.ExpressionEvaluator

public class QueryToMongoDBMapper
extends org.datanucleus.query.evaluator.AbstractExpressionEvaluator

Class which maps a compiled (generic) query to an MongoDB query.

Constructor Summary

Constructors

Constructor and Description
QueryToMongoDBMapper(org.datanucleus.query.compiler.QueryCompilation compilation, Map parameters, org.datanucleus.metadata.AbstractClassMetaData cmd, org.datanucleus.ExecutionContext ec, org.datanucleus.store.query.Query q)

Method Summary

Modifier and Type	Method and Description
void	compile()
protected void	compileFilter() Method to compile the WHERE clause of the query
protected void	compileOrdering() Method to compile the ordering clause of the query
protected void	compileResult() Method to compile the result clause of the query
protected MongoFieldExpression	getFieldNameForPrimary(org.datanucleus.query.expression.PrimaryExpression expr) Convenience method to return the "field name" in candidate document for this primary.
MongoBooleanExpression	getFilterExpression()
com.mongodb.BasicDBObject	getOrderingObject()
MongoDBResult	getResultObject()
boolean	isFilterComplete()
boolean	isPrecompilable()
boolean	isResultComplete()
protected Object	processAndExpression(org.datanucleus.query.expression.Expression expr)
protected Object	processEqExpression(org.datanucleus.query.expression.Expression expr)
protected Object	processGteqExpression(org.datanucleus.query.expression.Expression expr)
protected Object	processGtExpression(org.datanucleus.query.expression.Expression expr)
protected Object	processInvokeExpression(org.datanucleus.query.expression.InvokeExpression expr)
protected Object	processLiteral(org.datanucleus.query.expression.Literal expr)
protected Object	processLteqExpression(org.datanucleus.query.expression.Expression expr)
protected Object	processLtExpression(org.datanucleus.query.expression.Expression expr)
protected Object	processNoteqExpression(org.datanucleus.query.expression.Expression expr)
protected Object	processOrExpression(org.datanucleus.query.expression.Expression expr)
protected Object	processParameterExpression(org.datanucleus.query.expression.ParameterExpression expr)
protected Object	processPrimaryExpression(org.datanucleus.query.expression.PrimaryExpression expr)

Methods inherited from class org.datanucleus.query.evaluator.AbstractExpressionEvaluator

compileAdditiveMultiplicativeExpression, compileOrAndExpression, compilePrimaryExpression, compileRelationalExpression, compileUnaryExpression, evaluate, processAddExpression, processBitAndExpression, processBitOrExpression, processBitXorExpression, processCaseExpression, processCastExpression, processComExpression, processCreatorExpression, processDistinctExpression, processDivExpression, processInExpression, processIsExpression, processIsnotExpression, processLikeExpression, processModExpression, processMulExpression, processNegExpression, processNotExpression, processNotInExpression, processSubExpression, processSubqueryExpression, processVariableExpression

Methods inherited from class java.lang.Object

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

Constructor Detail

QueryToMongoDBMapper

public QueryToMongoDBMapper(org.datanucleus.query.compiler.QueryCompilation compilation,
                            Map parameters,
                            org.datanucleus.metadata.AbstractClassMetaData cmd,
                            org.datanucleus.ExecutionContext ec,
                            org.datanucleus.store.query.Query q)

Method Detail

isFilterComplete

public boolean isFilterComplete()

isResultComplete

public boolean isResultComplete()

isPrecompilable

public boolean isPrecompilable()

getFilterExpression

public MongoBooleanExpression getFilterExpression()

getResultObject

public MongoDBResult getResultObject()

getOrderingObject

public com.mongodb.BasicDBObject getOrderingObject()

compile

public void compile()

compileFilter

protected void compileFilter()

Method to compile the WHERE clause of the query

compileResult

protected void compileResult()

Method to compile the result clause of the query

compileOrdering

protected void compileOrdering()

Method to compile the ordering clause of the query

processAndExpression

protected Object processAndExpression(org.datanucleus.query.expression.Expression expr)

Overrides:

processAndExpression in class org.datanucleus.query.evaluator.AbstractExpressionEvaluator

processOrExpression

protected Object processOrExpression(org.datanucleus.query.expression.Expression expr)

Overrides:

processOrExpression in class org.datanucleus.query.evaluator.AbstractExpressionEvaluator

processEqExpression

protected Object processEqExpression(org.datanucleus.query.expression.Expression expr)

Overrides:

processEqExpression in class org.datanucleus.query.evaluator.AbstractExpressionEvaluator

processNoteqExpression

protected Object processNoteqExpression(org.datanucleus.query.expression.Expression expr)

Overrides:

processNoteqExpression in class org.datanucleus.query.evaluator.AbstractExpressionEvaluator

processGtExpression

protected Object processGtExpression(org.datanucleus.query.expression.Expression expr)

Overrides:

processGtExpression in class org.datanucleus.query.evaluator.AbstractExpressionEvaluator

processLtExpression

protected Object processLtExpression(org.datanucleus.query.expression.Expression expr)

Overrides:

processLtExpression in class org.datanucleus.query.evaluator.AbstractExpressionEvaluator

processGteqExpression

protected Object processGteqExpression(org.datanucleus.query.expression.Expression expr)

Overrides:

processGteqExpression in class org.datanucleus.query.evaluator.AbstractExpressionEvaluator

processLteqExpression

protected Object processLteqExpression(org.datanucleus.query.expression.Expression expr)

Overrides:

processLteqExpression in class org.datanucleus.query.evaluator.AbstractExpressionEvaluator

processPrimaryExpression

protected Object processPrimaryExpression(org.datanucleus.query.expression.PrimaryExpression expr)

Overrides:

processPrimaryExpression in class org.datanucleus.query.evaluator.AbstractExpressionEvaluator

processParameterExpression

protected Object processParameterExpression(org.datanucleus.query.expression.ParameterExpression expr)

Overrides:

processParameterExpression in class org.datanucleus.query.evaluator.AbstractExpressionEvaluator

processLiteral

protected Object processLiteral(org.datanucleus.query.expression.Literal expr)

Overrides:

processLiteral in class org.datanucleus.query.evaluator.AbstractExpressionEvaluator

processInvokeExpression

protected Object processInvokeExpression(org.datanucleus.query.expression.InvokeExpression expr)

Overrides:

processInvokeExpression in class org.datanucleus.query.evaluator.AbstractExpressionEvaluator

getFieldNameForPrimary

protected MongoFieldExpression getFieldNameForPrimary(org.datanucleus.query.expression.PrimaryExpression expr)

Convenience method to return the "field name" in candidate document for this primary. Allows for simple relation fields, and (nested) embedded PC fields - i.e all fields that are present in the document.

Parameters:

expr - The expression

Returns:

The document field name for this primary (or null if not resolvable in this document)