AxisExpression (QDL root module 1.6.1.0 API)

java.lang.Object
- org.qdl_lang.expressions.ExpressionImpl
- - org.qdl_lang.expressions.AxisExpression

All Implemented Interfaces:

Serializable, ExpressionNode, ExpressionInterface, HasResultInterface, Statement
```
public class AxisExpression
extends ExpressionImpl
```
See Also:

Serialized Form

Field Summary
- Fields inherited from class org.qdl_lang.expressions.ExpressionImpl
  arguments, result, valence
- 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
`AxisExpression()`
`AxisExpression(int operatorType)`
`AxisExpression(int operatorType, TokenPosition tokenPosition)`
`AxisExpression(TokenPosition tokenPosition)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Object`	`evaluate(State state)`
`Long`	`getAxis()`
`AxisExpression`	`getAxisExpression()`
`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.
`QDLStem`	`getStem()`
`boolean`	`hasAxis()`
`boolean`	`hasAxisExpression()`
`boolean`	`hasStem()`
`boolean`	`isStar()`
`ExpressionInterface`	`makeCopy()`
`void`	`setAxis(Long axis)`
`void`	`setAxisExpression(AxisExpression axisExpression)`
`void`	`setStar(boolean star)`
`void`	`setStem(QDLStem stem)`
`String`	`toString()`

Methods inherited from class org.qdl_lang.expressions.ExpressionImpl
addArgument, evalArg, evalLastArg, evaluatedArgs, getAlias, getArgAt, getArgCount, getArguments, getEvaluatedArgs, getLastArg, getOperatorType, getResult, getResultType, getSourceCode, getTokenPosition, hasAlias, hasEvaluatedArgs, hasTokenPosition, isEvaluated, isSizeQuery, setAlias, setArguments, setEvaluated, setEvaluatedArgs, setOperatorType, setResult, setResultType, setSizeQuery, setSourceCode, setTokenPosition

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

AxisExpression
```
public AxisExpression()
```

AxisExpression

public AxisExpression(TokenPosition tokenPosition)

AxisExpression

public AxisExpression(int operatorType,
                      TokenPosition tokenPosition)

AxisExpression

public AxisExpression(int operatorType)

Method Detail
- makeCopy
```
public ExpressionInterface makeCopy()
```
- 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).
  
  Returns:
- evaluate
```
public Object evaluate(State state)
```
- hasAxis
```
public boolean hasAxis()
```
- getAxis
```
public Long getAxis()
```
- setAxis
```
public void setAxis(Long axis)
```
- getStem
```
public QDLStem getStem()
```
- setStem
```
public void setStem(QDLStem stem)
```
- hasStem
```
public boolean hasStem()
```
- getAxisExpression
```
public AxisExpression getAxisExpression()
```
- setAxisExpression
```
public void setAxisExpression(AxisExpression axisExpression)
```
- hasAxisExpression
```
public boolean hasAxisExpression()
```
- toString
```
public String toString()
```
  Overrides:
  
  toString in class ExpressionImpl
- isStar
```
public boolean isStar()
```
- setStar
```
public void setStar(boolean star)
```