Package com.espertech.esper.common.internal.epl.expression.table

Class ExprTableAccessNode

java.lang.Object

com.espertech.esper.common.internal.epl.expression.core.ExprNodeBase

com.espertech.esper.common.internal.epl.expression.table.ExprTableAccessNode

All Implemented Interfaces:

ExprEvaluator, ExprForge, ExprForgeInstrumentable, ExprNode, ExprNodeRenderable, ExprValidator

Direct Known Subclasses:

ExprTableAccessNodeKeys, ExprTableAccessNodeSubprop, ExprTableAccessNodeTopLevel

public abstract class ExprTableAccessNode
extends ExprNodeBase
implements ExprForgeInstrumentable, ExprEvaluator

Field Summary

Fields

Modifier and Type	Field	Description
protected ExprForge[]	groupKeyEvaluators
protected ExprTableEvalStrategyFactoryForge	strategy
protected TableMetaData	tableMeta
protected final String	tableName

Fields inherited from interface com.espertech.esper.common.internal.epl.expression.core.ExprEvaluator

EPTYPE, EPTYPEARRAY

Constructor Summary

Constructors

Constructor	Description
ExprTableAccessNode(String tableName)	Ctor.

Method Summary

Modifier and Type	Method	Description
boolean	equalsNode(ExprNode o, boolean ignoreStreamPrefix)	Return true if a expression node semantically equals the current node, or false if not.
protected abstract boolean	equalsNodeInternal(ExprTableAccessNode other)
final Object	evaluate(EventBean[] eventsPerStream, boolean isNewData, ExprEvaluatorContext context)	Evaluate event tuple and return result.
CodegenExpression	evaluateCodegen(EPTypeClass requiredType, CodegenMethodScope parent, ExprForgeCodegenSymbol exprSymbol, CodegenClassScope codegenClassScope)
CodegenExpression	evaluateCodegenUninstrumented(EPTypeClass requiredType, CodegenMethodScope codegenMethodScope, ExprForgeCodegenSymbol exprSymbol, CodegenClassScope codegenClassScope)
CodegenExpression	evaluateGetEventBeanCodegen(CodegenMethodScope parent, ExprForgeCodegenSymbol exprSymbol, CodegenClassScope codegenClassScope)
CodegenExpression	evaluateGetROCollectionEventsCodegen(CodegenMethodScope parent, ExprForgeCodegenSymbol exprSymbol, CodegenClassScope codegenClassScope)
CodegenExpression	evaluateGetROCollectionScalarCodegen(CodegenMethodScope parent, ExprForgeCodegenSymbol exprSymbol, CodegenClassScope codegenClassScope)
ExprEvaluator	getExprEvaluator()
final ExprForgeConstantType	getForgeConstantType()
ExprNodeRenderable	getForgeRenderable()
protected abstract String	getInstrumentationQName()
protected abstract CodegenExpression[]	getInstrumentationQParams()
final ExprPrecedenceEnum	getPrecedence()	Returns precedence.
abstract ExprTableEvalStrategyFactoryForge	getTableAccessFactoryForge()
int	getTableAccessNumber()
TableMetaData	getTableMeta()
String	getTableName()
protected static CodegenExpression	makeEvaluate(com.espertech.esper.common.internal.epl.expression.table.ExprTableAccessNode.AccessEvaluationType evaluationType, ExprTableAccessNode accessNode, EPType resultType, CodegenMethodScope parent, ExprForgeCodegenSymbol symbols, CodegenClassScope classScope)
void	setTableAccessNumber(int tableAccessNumber)
protected void	toPrecedenceFreeEPLInternal(StringWriter writer, ExprNodeRenderableFlags flags)
protected void	toPrecedenceFreeEPLInternal(StringWriter writer, String subprop, ExprNodeRenderableFlags flags)
final ExprNode	validate(ExprValidationContext validationContext)
protected abstract void	validateBindingInternal(ExprValidationContext validationContext)
protected void	validateGroupKeys(TableMetaData metadata, ExprValidationContext validationContext)
protected TableMetadataColumn	validateSubpropertyGetCol(TableMetaData tableMetadata, String subpropName)

Methods inherited from class com.espertech.esper.common.internal.epl.expression.core.ExprNodeBase

accept, accept, acceptChildnodes, addChildNode, addChildNodes, addChildNodeToFront, checkValidated, checkValidatedException, getChildNodes, replaceUnlistedChildNode, setChildNode, setChildNodes, toEPL, toPrecedenceFreeEPL

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.espertech.esper.common.internal.epl.expression.core.ExprForge

getEvaluationType

Methods inherited from interface com.espertech.esper.common.internal.epl.expression.core.ExprNode

getForge

Field Details

tableName

protected final String tableName

tableMeta

protected TableMetaData tableMeta

strategy

protected ExprTableEvalStrategyFactoryForge strategy

groupKeyEvaluators

protected ExprForge[] groupKeyEvaluators

Constructor Details

ExprTableAccessNode

public ExprTableAccessNode(String tableName)

Ctor. Getting a table name allows "eplToModel" without knowing tables.

Parameters:

tableName - table name

Method Details

validateBindingInternal

protected abstract void validateBindingInternal(ExprValidationContext validationContext)
                                         throws ExprValidationException

Throws:

ExprValidationException

equalsNodeInternal

protected abstract boolean equalsNodeInternal(ExprTableAccessNode other)

getInstrumentationQName

protected abstract String getInstrumentationQName()

getInstrumentationQParams

protected abstract CodegenExpression[] getInstrumentationQParams()

getTableAccessFactoryForge

public abstract ExprTableEvalStrategyFactoryForge getTableAccessFactoryForge()

getTableName

public String getTableName()

validate

public final ExprNode validate(ExprValidationContext validationContext)
                        throws ExprValidationException

Specified by:

validate in interface ExprValidator

Throws:

ExprValidationException

validateGroupKeys

protected void validateGroupKeys(TableMetaData metadata,
 ExprValidationContext validationContext)
                          throws ExprValidationException

Throws:

ExprValidationException

getPrecedence

public final ExprPrecedenceEnum getPrecedence()

Description copied from interface: ExprNode

Returns precedence.

Specified by:

getPrecedence in interface ExprNode

Returns:

precedence

getForgeRenderable

public ExprNodeRenderable getForgeRenderable()

Specified by:

getForgeRenderable in interface ExprForge

evaluateCodegenUninstrumented

public CodegenExpression evaluateCodegenUninstrumented(EPTypeClass requiredType,
 CodegenMethodScope codegenMethodScope,
 ExprForgeCodegenSymbol exprSymbol,
 CodegenClassScope codegenClassScope)

Specified by:

evaluateCodegenUninstrumented in interface ExprForgeInstrumentable

evaluateCodegen

public CodegenExpression evaluateCodegen(EPTypeClass requiredType,
 CodegenMethodScope parent,
 ExprForgeCodegenSymbol exprSymbol,
 CodegenClassScope codegenClassScope)

Specified by:

evaluateCodegen in interface ExprForge

evaluateGetROCollectionEventsCodegen

public CodegenExpression evaluateGetROCollectionEventsCodegen(CodegenMethodScope parent,
 ExprForgeCodegenSymbol exprSymbol,
 CodegenClassScope codegenClassScope)

evaluateGetROCollectionScalarCodegen

public CodegenExpression evaluateGetROCollectionScalarCodegen(CodegenMethodScope parent,
 ExprForgeCodegenSymbol exprSymbol,
 CodegenClassScope codegenClassScope)

evaluateGetEventBeanCodegen

public CodegenExpression evaluateGetEventBeanCodegen(CodegenMethodScope parent,
 ExprForgeCodegenSymbol exprSymbol,
 CodegenClassScope codegenClassScope)

getForgeConstantType

public final ExprForgeConstantType getForgeConstantType()

Specified by:

getForgeConstantType in interface ExprForge

getExprEvaluator

public ExprEvaluator getExprEvaluator()

Specified by:

getExprEvaluator in interface ExprForge

evaluate

public final Object evaluate(EventBean[] eventsPerStream,
 boolean isNewData,
 ExprEvaluatorContext context)

Description copied from interface: ExprEvaluator

Evaluate event tuple and return result.

Specified by:

evaluate in interface ExprEvaluator

Parameters:

eventsPerStream - - event tuple

isNewData - - indicates whether we are dealing with new data (istream) or old data (rstream)

context - context for expression evaluation

Returns:

evaluation result, a boolean value for OR/AND-type evalution nodes.

toPrecedenceFreeEPLInternal

protected void toPrecedenceFreeEPLInternal(StringWriter writer,
 String subprop,
 ExprNodeRenderableFlags flags)

toPrecedenceFreeEPLInternal

protected void toPrecedenceFreeEPLInternal(StringWriter writer,
 ExprNodeRenderableFlags flags)

validateSubpropertyGetCol

protected TableMetadataColumn validateSubpropertyGetCol(TableMetaData tableMetadata,
 String subpropName)
                                                 throws ExprValidationException

Throws:

ExprValidationException

equalsNode

public boolean equalsNode(ExprNode o,
 boolean ignoreStreamPrefix)

Description copied from interface: ExprNode

Return true if a expression node semantically equals the current node, or false if not.

Concrete implementations should compare the type and any additional information that impact the evaluation of a node.

Specified by:

equalsNode in interface ExprNode

Parameters:

o - to compare to

ignoreStreamPrefix - when the equals-comparison can ignore prefix of event properties

Returns:

true if semantically equal, or false if not equals

setTableAccessNumber

public void setTableAccessNumber(int tableAccessNumber)

getTableAccessNumber

public int getTableAccessNumber()

getTableMeta

public TableMetaData getTableMeta()

makeEvaluate

protected static CodegenExpression makeEvaluate(com.espertech.esper.common.internal.epl.expression.table.ExprTableAccessNode.AccessEvaluationType evaluationType,
 ExprTableAccessNode accessNode,
 EPType resultType,
 CodegenMethodScope parent,
 ExprForgeCodegenSymbol symbols,
 CodegenClassScope classScope)