org.datanucleus.store.hbase.query

Class QueryToHBaseMapper

java.lang.Object

org.datanucleus.query.evaluator.AbstractExpressionEvaluator

org.datanucleus.store.hbase.query.QueryToHBaseMapper

All Implemented Interfaces:

org.datanucleus.query.expression.ExpressionEvaluator

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

Class which maps a compiled (generic) query to a HBase query.

Constructor Summary

Constructors

Constructor and Description
QueryToHBaseMapper(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

Methods

Modifier and Type	Method and Description
void	compile()
protected void	compileFilter() Method to compile the WHERE clause of the query
protected org.datanucleus.store.hbase.query.QueryToHBaseMapper.PrimaryDetails	getFamilyColumnNameForPrimary(List<String> tuples) Convenience method to return the "{familyName}###{columnName}" in candidate for this primary.
HBaseBooleanExpression	getFilterExpression()
boolean	isFilterComplete()
boolean	isPrecompilable() Accessor for whether the query is precompilable (doesn't need to know parameter values to be able to compile it).
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	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, processCaseExpression, processCastExpression, processComExpression, processCreatorExpression, processDistinctExpression, processDivExpression, processInExpression, processInvokeExpression, 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

QueryToHBaseMapper

public QueryToHBaseMapper(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()

getFilterExpression

public HBaseBooleanExpression getFilterExpression()

compile

public void compile()

isPrecompilable

public boolean isPrecompilable()

Accessor for whether the query is precompilable (doesn't need to know parameter values to be able to compile it).

Returns:

Whether the query is precompilable and hence cacheable

compileFilter

protected void compileFilter()

Method to compile the WHERE clause of the query

processOrExpression

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

Overrides:

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

processAndExpression

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

Overrides:

processAndExpression 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

getFamilyColumnNameForPrimary

protected org.datanucleus.store.hbase.query.QueryToHBaseMapper.PrimaryDetails getFamilyColumnNameForPrimary(List<String> tuples)

Convenience method to return the "{familyName}###{columnName}" in candidate for this primary. Allows for non-relation fields, and (nested) embedded PC fields - i.e all fields that are present in the table.

Parameters:

tuples - Tuples for the primary

Returns:

The family+column name for this primary (or null if not resolvable in this document)