Package com.yahoo.vespa.indexinglanguage.expressions

Class StatementExpression

java.lang.Object

com.yahoo.vespa.objects.Selectable

com.yahoo.vespa.indexinglanguage.expressions.Expression

com.yahoo.vespa.indexinglanguage.expressions.CompositeExpression

com.yahoo.vespa.indexinglanguage.expressions.ExpressionList<Expression>

com.yahoo.vespa.indexinglanguage.expressions.StatementExpression

All Implemented Interfaces:

Iterable<Expression>

public final class StatementExpression
extends ExpressionList<Expression>

An indexing statement consisting of a list of indexing expressions, e.g "input foo | index | attribute".

Author:

Simon Thoresen Hult

Constructor Summary

Constructors

Constructor	Description
StatementExpression(Expression... list)
StatementExpression(Iterable<Expression> list)

Method Summary

Modifier and Type	Method	Description
StatementExpression	convertChildren(ExpressionConverter converter)	Returns an expression where the children of this has been converted using the given converter.
protected void	doExecute(ExecutionContext context)
protected void	doResolve(TypeContext context)
boolean	equals(Object obj)
static StatementExpression	fromString(String expression)	Creates an expression with simple lingustics for testing
static StatementExpression	fromString(String expression, com.yahoo.language.Linguistics linguistics, Map<String,com.yahoo.language.process.Chunker> chunkers, Map<String,com.yahoo.language.process.Embedder> embedders, Map<String,com.yahoo.language.process.FieldGenerator> generators)
static StatementExpression	fromString(String expression, com.yahoo.language.Linguistics linguistics, Map<String,com.yahoo.language.process.Embedder> embedders)
List<String>	getInputFields()	Returns the input fields which are (perhaps optionally) consumed by some expression in this statement.
boolean	isMutating()	Returns whether this expression outputs a different value than what it gets as input.
static StatementExpression	newInstance(ScriptParserContext config)
com.yahoo.document.DataType	setInputType(com.yahoo.document.DataType input, TypeContext context)	Sets the input type of this and returns the resulting output type, or null if it cannot be uniquely determined.
com.yahoo.document.DataType	setOutputType(com.yahoo.document.DataType output, TypeContext context)	Sets the output type of this and returns the resulting input type, or null if it cannot be uniquely determined.
String	toString()

Methods inherited from class com.yahoo.vespa.indexinglanguage.expressions.ExpressionList

asList, convertChildList, expressions, get, hashCode, isEmpty, iterator, requiresInput, selectMembers, setStatementOutput, size

Methods inherited from class com.yahoo.vespa.indexinglanguage.expressions.CompositeExpression

toScriptBlock

Methods inherited from class com.yahoo.vespa.indexinglanguage.expressions.Expression

execute, execute, execute, execute, execute, execute, execute, execute, execute, execute, execute, execute, getInputType, getOutputType, getOutputType, leastGeneralNonNullOf, leastGeneralOf, mostGeneralOf, requireOutputType, resolve, resolve, resolve, resolve, resolve, resolve, resolve, resolve, resolve, setInputType, setOutputType

Methods inherited from class com.yahoo.vespa.objects.Selectable

select, select

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Details

StatementExpression

public StatementExpression(Expression... list)

StatementExpression

public StatementExpression(Iterable<Expression> list)

Method Details

isMutating

public boolean isMutating()

Description copied from class: Expression

Returns whether this expression outputs a different value than what it gets as input. Annotating a string value does not count as modifying it.

Overrides:

isMutating in class Expression

getInputFields

public List<String> getInputFields()

Returns the input fields which are (perhaps optionally) consumed by some expression in this statement.

convertChildren

public StatementExpression convertChildren(ExpressionConverter converter)

Description copied from class: Expression

Returns an expression where the children of this has been converted using the given converter. This default implementation returns this as it has no children.

Specified by:

convertChildren in class CompositeExpression

setInputType

public com.yahoo.document.DataType setInputType(com.yahoo.document.DataType input,
 TypeContext context)

Description copied from class: Expression

Sets the input type of this and returns the resulting output type, or null if it cannot be uniquely determined. Subtypes may implement this by calling setInputType(inputType, requiredType, VerificationContext context).

Overrides:

setInputType in class Expression

setOutputType

public com.yahoo.document.DataType setOutputType(com.yahoo.document.DataType output,
 TypeContext context)

Description copied from class: Expression

Sets the output type of this and returns the resulting input type, or null if it cannot be uniquely determined. Subtypes implement this by calling setOutputType(outputType, requiredType, VerificationContext context).

Overrides:

setOutputType in class Expression

doResolve

protected void doResolve(TypeContext context)

Overrides:

doResolve in class Expression

doExecute

protected void doExecute(ExecutionContext context)

Specified by:

doExecute in class Expression

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class ExpressionList<Expression>

fromString

public static StatementExpression fromString(String expression)
                                      throws ParseException

Creates an expression with simple lingustics for testing

Throws:

ParseException

fromString

public static StatementExpression fromString(String expression,
 com.yahoo.language.Linguistics linguistics,
 Map<String,com.yahoo.language.process.Embedder> embedders)
                                      throws ParseException

Throws:

ParseException

fromString

public static StatementExpression fromString(String expression,
 com.yahoo.language.Linguistics linguistics,
 Map<String,com.yahoo.language.process.Chunker> chunkers,
 Map<String,com.yahoo.language.process.Embedder> embedders,
 Map<String,com.yahoo.language.process.FieldGenerator> generators)
                                      throws ParseException

Throws:

ParseException

newInstance

public static StatementExpression newInstance(ScriptParserContext config)
                                       throws ParseException

Throws:

ParseException