org.objectweb.medor.filter.lib
Class IndexedLocate

java.lang.Object
  |
  +--org.objectweb.medor.filter.lib.BasicThreeArgsOperator
        |
        +--org.objectweb.medor.filter.lib.IndexedLocate
All Implemented Interfaces:
java.lang.Cloneable, Cloneable, Expression, Operator, ThreeArgsOperator

public class IndexedLocate
extends BasicThreeArgsOperator
implements ThreeArgsOperator

Operator representing the search for a substring within a given input string, starting at a given index.


Field Summary
 
Fields inherited from class org.objectweb.medor.filter.lib.BasicThreeArgsOperator
first, firstResult, result, second, secondResult, third, thirdResult, type, verified
 
Fields inherited from interface org.objectweb.medor.filter.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, SUBSTRING, SUM, UMINUS
 
Constructor Summary
IndexedLocate()
           
IndexedLocate(Expression inputString, Expression substring, Expression fromIndex)
          Constructs an IndexedLocate operator, representing the search for a substring in an input string, starting at a given index.
 
Method Summary
 void compileExpression()
          Checks the semantic integrity of an expression.
 void evaluate(ParameterOperand[] pos, Tuple t)
          It evaluates the expression tree and puts the result into the operand result.
 int evaluate(java.lang.String inputString, java.lang.String subString, int fromIndex)
           
 java.lang.String getOperatorString()
          Returns the String representing the operator in Java
 
Methods inherited from class org.objectweb.medor.filter.lib.BasicThreeArgsOperator
clone, getExpression, getFirstExpression, getOperandNumber, getResult, getSecondExpression, getThirdExpression, getType, isCompiled, setExpression, setFirstExpression, setSecondExpression, setThirdExpression
 
Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface org.objectweb.medor.filter.api.ThreeArgsOperator
getFirstExpression, getSecondExpression, getThirdExpression, setFirstExpression, setSecondExpression, setThirdExpression
 
Methods inherited from interface org.objectweb.medor.filter.api.Operator
getExpression, getOperandNumber, setExpression
 
Methods inherited from interface org.objectweb.medor.filter.api.Expression
getResult, getType, isCompiled
 
Methods inherited from interface org.objectweb.medor.api.Cloneable
clone
 

Constructor Detail

IndexedLocate

public IndexedLocate(Expression inputString,
                     Expression substring,
                     Expression fromIndex)
Constructs an IndexedLocate operator, representing the search for a substring in an input string, starting at a given index.

It is the equivalent of the Java indexOf String manipulation method.

If the substring argument occurs as a substring within the inputString at a starting index no smaller than fromIndex, then the index of the first character of the first such substring is returned. If it does not occur as a substring starting at fromIndex or beyond, -1 is returned.

Unlike in Java, the index starts with 1 and not 0.

Parameters:
inputString - the String in which to look.
substring - the substring to search for.
fromIndex - the index to start the search from.

IndexedLocate

public IndexedLocate()
Method Detail

evaluate

public void evaluate(ParameterOperand[] pos,
                     Tuple t)
              throws MedorException,
                     java.lang.IllegalStateException
Description copied from interface: Expression
It evaluates the expression tree and puts the result into the operand result.

Specified by:
evaluate in interface Expression
Specified by:
evaluate in class BasicThreeArgsOperator
Parameters:
pos - a list of ParameterOperand
t - Tuple
Throws:
java.lang.IllegalStateException - if this expression is not compiled.
MedorException - if evaluation error

compileExpression

public void compileExpression()
                       throws TypingException,
                              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
TypingException - when incompatible types error occures.

evaluate

public int evaluate(java.lang.String inputString,
                    java.lang.String subString,
                    int fromIndex)

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