org.expressionj.expr

Class ExprECHO

java.lang.Object

org.expressionj.model.AbstractExpression

org.expressionj.expr.AbstractUnaryExpression

org.expressionj.expr.AbstractUnaryNumericExpression

org.expressionj.expr.ExprECHO

All Implemented Interfaces:

java.lang.Cloneable, Expression, ExpressionType, UnaryExpression

public class ExprECHO
extends AbstractUnaryNumericExpression

Represent a "echo" expression. The echo expression will echo its expression to the PrintStream defined by the EchoLogger class, or to the standard Output Stream if the PrintStream is undefined. Note that the result of this expression is the content in the echo expression, so that for example: echo(2) will both echo the value 2 on the PrintStream and return 2.

See Also:

EchoLogger

Field Summary

Fields inherited from class org.expressionj.expr.AbstractUnaryNumericExpression

type

Fields inherited from class org.expressionj.expr.AbstractUnaryExpression

expr

Fields inherited from class org.expressionj.model.AbstractExpression

block, root

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

Constructor Summary

Constructors

Constructor and Description
ExprECHO(Expression root)

Method Summary

Modifier and Type	Method and Description
java.lang.Object	clone()
java.lang.Object	eval() Evaluate the expression.
Expression	getExpression() Return the associated expression.
java.lang.String	getExpressionName() Return the expression name.
short	getResultStructure() Return the structure of the result for the expression.
void	setExpression(Expression expr)

Methods inherited from class org.expressionj.expr.AbstractUnaryNumericExpression

getResultType

Methods inherited from class org.expressionj.expr.AbstractUnaryExpression

getVariables

Methods inherited from class org.expressionj.model.AbstractExpression

evalAsBoolean, evalAsFloat, evalAsInt, getParentBlock, getRoot, setParentBlock, setRoot

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

evalAsBoolean, evalAsFloat, evalAsInt, getLocalVariable, getLocalVariables, getParentBlock, getRoot, getVariable, getVariable, getVariables, hasVariable, hasVariable, removeVariable, setParentBlock

Constructor Detail

ExprECHO

public ExprECHO(Expression root)

Method Detail

clone

public java.lang.Object clone()
                       throws java.lang.CloneNotSupportedException

Specified by:

clone in interface Expression

Specified by:

clone in class AbstractExpression

Throws:

java.lang.CloneNotSupportedException

getExpressionName

public java.lang.String getExpressionName()

Description copied from interface: Expression

Return the expression name.

Returns:

the expression name

setExpression

public void setExpression(Expression expr)

getExpression

public Expression getExpression()

Description copied from interface: Expression

Return the associated expression. Return this by default.

Returns:

the associated expression

eval

public java.lang.Object eval()
                      throws java.lang.ArithmeticException

Description copied from interface: Expression

Evaluate the expression.

Returns:

the result

Throws:

java.lang.ArithmeticException

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

Overrides:

getResultStructure in class AbstractUnaryNumericExpression

Returns:

he structure of the result for the expression