Package org.qdl_lang.variables

Class StemEntryNode

java.lang.Object

org.qdl_lang.variables.StemEntryNode

All Implemented Interfaces:

Serializable, ExpressionInterface, HasResultInterface, Statement

public class StemEntryNode
extends Object
implements ExpressionInterface

Models an entry for a stem variable (that is not a list element). This is needed because these can be expressions for the key and value which can only be determined at runtime, not earlier, hence everything has to be evaluated. Note that these come from the parser directly and are really only used by StemVariableNode to track its entries.

Created by Jeff Gaynor
on 9/28/20 at 1:47 PM

See Also:

Serialized Form

Field Summary

Fields inherited from interface org.qdl_lang.statements.ExpressionInterface

ALL_INDICES_NODE, ALT_IF_NODE, ASSIGNMENT_NODE, AXIS_RESTRICTION_NODE, CLOSED_SLICE_NODE, COMPARISON_DYAD_NODE, CONSTANT_NODE, DYAD_NODE, DYADIC_FUNCTION_REFERENCE_NODE, EXPRESSION_STEM_NODE, EXPRESSION_STEM2_NODE, FUNCTION_REFERENCE_NODE, LAMBDA_DEFINITION_NODE, LIST_NODE, MODULE_NODE, MONAD_NODE, NILAD_NODE, OPEN_SLICE_NODE, PARENTHESIZED_NODE, PARSE_EXPRESSION_BLOCK_NODE, PARSE_STATEMENT_BLOCK_NODE, POLYAD_NODE, QDL_NULL_NODE, SELECT_NODE, SET_NODE, STEM_ENTRY_NODE, STEM_EXTRACTION_NODE, STEM_NODE, UNKNOWN_NODE, VARIABLE_NODE

Constructor Summary

Constructors

Constructor	Description
StemEntryNode()

Method Summary

Modifier and Type	Method	Description
QDLValue	evaluate(State state)
String	getAlias()
ExpressionInterface	getKey()
int	getNodeType()	QDL is not strongly typed but Java is, so each node type should have a unique integer and conditionals should use that, not the instanceof operator.
QDLValue	getResult()
int	getResultType()
List<String>	getSourceCode()
TokenPosition	getTokenPosition()
Statement	getValue()
boolean	hasAlias()
boolean	hasTokenPosition()
boolean	isDefaultValue()
boolean	isEvaluated()
ExpressionInterface	makeCopy()
void	setAlias(String alias)
void	setDefaultValue(boolean defaultValue)
void	setEvaluated(boolean evaluated)
void	setKey(ExpressionInterface key)
void	setResult(Object result)	Convenience method.This should turn the object into a proper QDLValue as needed.
void	setResult(QDLValue object)
void	setSourceCode(List<String> sourceCode)
void	setTokenPosition(TokenPosition tokenPosition)	Set the location of this token from the parser.
void	setValue(ExpressionInterface value)

Methods inherited from class java.lang.Object

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

Constructor Detail

StemEntryNode

public StemEntryNode()

Method Detail

setTokenPosition

public void setTokenPosition(TokenPosition tokenPosition)

Description copied from interface: Statement

Set the location of this token from the parser. This is used for error notifications later.

Specified by:

setTokenPosition in interface Statement

getTokenPosition

public TokenPosition getTokenPosition()

Specified by:

getTokenPosition in interface Statement

hasTokenPosition

public boolean hasTokenPosition()

Specified by:

hasTokenPosition in interface Statement

hasAlias

public boolean hasAlias()

Specified by:

hasAlias in interface ExpressionInterface

getAlias

public String getAlias()

Specified by:

getAlias in interface ExpressionInterface

setAlias

public void setAlias(String alias)

Specified by:

setAlias in interface ExpressionInterface

isDefaultValue

public boolean isDefaultValue()

setDefaultValue

public void setDefaultValue(boolean defaultValue)

getKey

public ExpressionInterface getKey()

setKey

public void setKey(ExpressionInterface key)

getValue

public Statement getValue()

setValue

public void setValue(ExpressionInterface value)

isEvaluated

public boolean isEvaluated()

Specified by:

isEvaluated in interface HasResultInterface

setEvaluated

public void setEvaluated(boolean evaluated)

Specified by:

setEvaluated in interface HasResultInterface

evaluate

public QDLValue evaluate(State state)

Specified by:

evaluate in interface Statement

getSourceCode

public List<String> getSourceCode()

Specified by:

getSourceCode in interface Statement

setSourceCode

public void setSourceCode(List<String> sourceCode)

Specified by:

setSourceCode in interface Statement

makeCopy

public ExpressionInterface makeCopy()

Specified by:

makeCopy in interface ExpressionInterface

getResult

public QDLValue getResult()

Specified by:

getResult in interface HasResultInterface

setResult

public void setResult(QDLValue object)

Specified by:

setResult in interface HasResultInterface

setResult

public void setResult(Object result)

Description copied from interface: HasResultInterface

Convenience method.This should turn the object into a proper QDLValue as needed.

Specified by:

setResult in interface HasResultInterface

getResultType

public int getResultType()

Specified by:

getResultType in interface HasResultInterface

getNodeType

public int getNodeType()

Description copied from interface: ExpressionInterface

QDL is not strongly typed but Java is, so each node type should have a unique integer and conditionals should use that, not the instanceof operator. This allows for efficient programming with switch statements rather than a bevy of conditionals (potentially each of which gets done even if the correct case has been handled).

Specified by:

getNodeType in interface ExpressionInterface

Returns: