ExprCHOICE (ExpressionJ javadoc)

java.lang.Object
- org.expressionj.expr.ExprCHOICE

All Implemented Interfaces:

java.lang.Cloneable, Expression, ExpressionType
```
public class ExprCHOICE
extends java.lang.Object
implements Expression
```
An if - then - else if - else expression.

Field Summary

Fields
Modifier and Type Field and Description

protected CodeBlock block
- Fields inherited from interface org.expressionj.model.ExpressionType
  STRUCT_ARRAY, STRUCT_SCALAR, STRUCT_STRUCTURE, TYPE_BOOL, TYPE_DYNAMIC, TYPE_FLOAT, TYPE_INTEGER, TYPE_NUMERIC, TYPE_STRING, TYPE_UNDEF

Fields
Modifier and Type	Field and Description
`protected CodeBlock`	`block`

Constructor Summary

Constructors
Constructor and Description

ExprCHOICE()

Constructors
Constructor and Description
`ExprCHOICE()`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`addCondition(Expression cond)`
`void`	`addExpression(Expression expr)`
`java.lang.Object`	`clone()`
`int`	`countConditions()` Return the number of conditions.
`java.lang.Object`	`eval()` Evaluate the expression.
`boolean`	`evalAsBoolean()` Evaluate the expression as a boolean.
`float`	`evalAsFloat()` Evaluate the expression as a float.
`int`	`evalAsInt()` Evaluate the expression as an int.
`java.util.List<Expression>`	`getConditions()` Return the conditions.
`java.lang.String`	`getExpressionName()` Return the expression name.
`java.util.List<Expression>`	`getExpressions()`
`CodeBlock`	`getParentBlock()` Return the parent expression block if the expression is one of several expressions separated by commas.
`short`	`getResultStructure()` Return the structure of the result for the expression.
`short`	`getResultType()` Return the type of the result for the expression.
`Expression`	`getRoot()` Return the root expression.
`Variable`	`getVariable(java.lang.String varName)` Return a variable declared by the expression.
`java.util.Map<java.lang.String,Variable>`	`getVariables()` Return the variables used by this expression.
`void`	`setParentBlock(CodeBlock block)` Set the parent expression block.

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

Methods inherited from interface org.expressionj.model.Expression
getExpression, getLocalVariable, getLocalVariables, getVariable, getVariables, hasVariable, hasVariable, removeVariable

- Field Detail
  - block
```
protected CodeBlock block
```
- Constructor Detail
  - ExprCHOICE
```
public ExprCHOICE()
```
- Method Detail
  - clone
```
public java.lang.Object clone()
                       throws java.lang.CloneNotSupportedException
```
    Specified by:
    
    clone in interface Expression
    
    Overrides:
    
    clone in class java.lang.Object
    
    Throws:
    
    java.lang.CloneNotSupportedException
  - getRoot
```
public Expression getRoot()
```
    Return the root expression.
    
    Specified by:
    
    getRoot in interface Expression
    
    Returns:
    
    the root expression
  - setParentBlock
```
public void setParentBlock(CodeBlock block)
```
    Description copied from interface: Expression
    
    Set the parent expression block.
    
    Specified by:
    
    setParentBlock in interface Expression
    
    Parameters:
    
    block - the parent expression block
  - getParentBlock
```
public CodeBlock getParentBlock()
```
    Description copied from interface: Expression
    
    Return the parent expression block if the expression is one of several expressions separated by commas. For example, in the following equation: b=a+2; return b, the two "b=a+2" and "return b" have "b=a+2; return b" as their parent block.
    
    Specified by:
    
    getParentBlock in interface Expression
    
    Returns:
    
    the parent expression block
  - addCondition
```
public void addCondition(Expression cond)
```
  - countConditions
```
public int countConditions()
```
    Return the number of conditions.
    
    Returns:
    
    the number of conditions
  - getConditions
```
public java.util.List<Expression> getConditions()
```
    Return the conditions.
    
    Returns:
    
    the conditions
  - addExpression
```
public void addExpression(Expression expr)
```
  - getExpressions
```
public java.util.List<Expression> getExpressions()
```
  - getVariables
```
public java.util.Map<java.lang.String,Variable> getVariables()
```
    Description copied from interface: Expression
    
    Return the variables used by this expression. Note that this method will not return any internal variables declared by the expression. For example, in the following expression: int c=a+b, only "a" and "b" will be returned.
    
    Specified by:
    
    getVariables in interface Expression
    
    Returns:
    
    the variables used by this expression
  - getExpressionName
```
public java.lang.String getExpressionName()
```
    Description copied from interface: Expression
    
    Return the expression name.
    
    Specified by:
    
    getExpressionName in interface Expression
    
    Returns:
    
    the expression name
  - getResultType
```
public short getResultType()
```
    Description copied from interface: Expression
    Return the type of the result for the expression. The type can be:
    - ExpressionType.TYPE_INTEGER: integer
    - ExpressionType.TYPE_FLOAT: float
    - ExpressionType.TYPE_NUMERIC: integer or float value. The runtime actual type may depend on the expression arguments
    - ExpressionType.TYPE_STRING: string
    - ExpressionType.TYPE_DYNAMIC: dynamic type. The runtime actual type may depend on the expression arguments
    - ExpressionType.TYPE_UNDEF: undefined type. The default type, characteristic of an error if entountered.
    Specified by:
    
    getResultType in interface Expression
    
    Returns:
    
    the type of the result for the expression
  - getResultStructure
```
public short getResultStructure()
```
    Description copied from interface: Expression
    Return the structure of the result for the expression. The structure can be:
    - ExpressionType.STRUCT_SCALAR: a scalar value
    - ExpressionType.STRUCT_ARRAY: an array value
    Specified by:
    
    getResultStructure in interface Expression
    
    Returns:
    
    he structure of the result for the expression
  - evalAsInt
```
public int evalAsInt()
```
    Description copied from interface: Expression
    
    Evaluate the expression as an int. The result of the evaluation will be the same as Expression.eval(), but the evaluation engine will be able to optimize the computation by knwoing that the result is an int (primitive valeus are cached internally).
    
    Specified by:
    
    evalAsInt in interface Expression
    
    Returns:
    
    the result as an int
  - evalAsFloat
```
public float evalAsFloat()
```
    Description copied from interface: Expression
    
    Evaluate the expression as a float. The result of the evaluation will be the same as Expression.eval(), but the evaluation engine will be able to optimize the computation by knwoing that the result is a float (primitive valeus are cached internally).
    
    Specified by:
    
    evalAsFloat in interface Expression
    
    Returns:
    
    the result as a float
  - evalAsBoolean
```
public boolean evalAsBoolean()
```
    Description copied from interface: Expression
    
    Evaluate the expression as a boolean. The result of the evaluation will be the same as Expression.eval(), but the evaluation engine will be able to optimize the computation by knwoing that the result is a boolean (primitive valeus are cached internally).
    
    Specified by:
    
    evalAsBoolean in interface Expression
    
    Returns:
    
    the result as a boolean
  - eval
```
public java.lang.Object eval()
```
    Description copied from interface: Expression
    
    Evaluate the expression.
    
    Specified by:
    
    eval in interface Expression
    
    Returns:
    
    the result
  - getVariable
```
public Variable getVariable(java.lang.String varName)
```
    Description copied from interface: Expression
    
    Return a variable declared by the expression.
    
    Specified by:
    
    getVariable in interface Expression
    
    Parameters:
    
    varName - the variable name
    
    Returns:
    
    the variable

Class ExprCHOICE

Field Summary

Fields inherited from interface org.expressionj.model.ExpressionType

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface org.expressionj.model.Expression

Field Detail

block

Constructor Detail

ExprCHOICE

Method Detail

clone

getRoot

setParentBlock

getParentBlock

addCondition

countConditions

getConditions

addExpression

getExpressions

getVariables

getExpressionName

getResultType

getResultStructure

evalAsInt

evalAsFloat

evalAsBoolean

eval

getVariable