org.objectweb.medor.expression.lib
Class Length

java.lang.Object
  extended byorg.objectweb.medor.clone.lib.BasicCloneable
      extended byorg.objectweb.medor.expression.lib.BasicExpression
          extended byorg.objectweb.medor.expression.lib.BasicOperator
              extended byorg.objectweb.medor.expression.lib.BasicUnaryOperator
                  extended byorg.objectweb.medor.expression.lib.Length
All Implemented Interfaces:
org.objectweb.medor.clone.api.Cloneable, java.lang.Cloneable, Expression, Operator, java.io.Serializable, UnaryOperator

public class Length
extends BasicUnaryOperator
implements UnaryOperator

See Also:
Serialized Form

Field Summary
 
Fields inherited from class org.objectweb.medor.expression.lib.BasicOperator
expressions, result, verified
 
Fields inherited from class org.objectweb.medor.expression.lib.BasicExpression
logger, type
 
Fields inherited from interface org.objectweb.medor.expression.api.Operator
ABS, AND, AVG, BITWIZE, CONCAT, CONDAND, CONDOR, COUNT, DIV, EQUAL, FIRSTLOCATE, GREATER, GREATEREQUAL, IN, INDEXEDLOCATE, LENGTH, LOWER, LOWEREQUAL, MAX, MEMBEROF, MIN, MINUS, MOD, MULT, NAV, NOT, NOTEQUAL, NOTMEMBEROF, OR, PLUS, SQRT, STRING_LOWER, STRING_UPPER, SUBSTRING, SUM, UMINUS
 
Constructor Summary
Length()
           
Length(Expression e)
           
 
Method Summary
 Operand compileExpression()
          Checks the semantic integrity of an expression.
 Operand evaluate(ParameterOperand[] pos, java.lang.Object o)
          It evaluates the expression tree and puts the result into the operand result.
 int evaluate(java.lang.String op)
           
 java.lang.String getOperatorString()
          Returns the String representing the operator in Java
 
Methods inherited from class org.objectweb.medor.expression.lib.BasicUnaryOperator
getExpression, getExpression, getOperandNumber, setExpression, setExpression
 
Methods inherited from class org.objectweb.medor.expression.lib.BasicOperator
clone
 
Methods inherited from class org.objectweb.medor.expression.lib.BasicExpression
getType
 
Methods inherited from class org.objectweb.medor.clone.lib.BasicCloneable
clone, clone, getClone
 
Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface org.objectweb.medor.expression.api.UnaryOperator
getExpression, setExpression
 
Methods inherited from interface org.objectweb.medor.expression.api.Operator
getExpression, getOperandNumber, setExpression
 
Methods inherited from interface org.objectweb.medor.expression.api.Expression
getType
 
Methods inherited from interface org.objectweb.medor.clone.api.Cloneable
clone
 

Constructor Detail

Length

public Length()

Length

public Length(Expression e)
Method Detail

evaluate

public Operand evaluate(ParameterOperand[] pos,
                        java.lang.Object o)
                 throws ExpressionException
Description copied from interface: Expression
It evaluates the expression tree and puts the result into the operand result.

Specified by:
evaluate in interface Expression
Parameters:
pos - a list of ParameterOperand
o - the input Object from which values are taken for the evaluation
Returns:
an Operand containing the result of the evaluation
Throws:
ExpressionException

evaluate

public int evaluate(java.lang.String op)

compileExpression

public Operand compileExpression()
                          throws ExpressionException,
                                 MalformedExpressionException
Description copied from interface: Expression
Checks the semantic integrity of an expression. It checks that all types are compatible and prepare the expression to be evaluable.It also creates buffers where stores the result. Notes that when evaluating there is no creation of new objects. This method change the state of this expression object, it will be evaluable and not modifiable.

Specified by:
compileExpression in interface Expression
Throws:
MalformedExpressionException - if syntax error
ExpressionException

getOperatorString

public java.lang.String getOperatorString()
Description copied from interface: Operator
Returns the String representing the operator in Java

Specified by:
getOperatorString in interface Operator
Returns:
the String representing the operator in Java