org.objectweb.medor.expression.lib
Class Substring
java.lang.Object
org.objectweb.medor.clone.lib.BasicCloneable
org.objectweb.medor.expression.lib.BasicExpression
org.objectweb.medor.expression.lib.BasicOperator
org.objectweb.medor.expression.lib.Substring
- All Implemented Interfaces:
- org.objectweb.medor.clone.api.Cloneable, java.lang.Cloneable, Expression, Operator, java.io.Serializable
- public class Substring
- extends BasicOperator
Operator representing the substring extraction given a String, a first
integer to start from and a second integer indicating the length of the
required substring.
- See Also:
- Serialized Form
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 |
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.Expression |
getType |
Substring
public Substring(Expression inputString,
Expression start,
Expression length)
- Constructs the operator
- Parameters:
inputString
- is the String from which to extract the substingstart
- is the index of the first character in the String to start
with. It is expected that 1 is the first character in the string (and
not 0 like in Java).length
- is the size of the requested substring
Substring
public Substring()
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.
- Parameters:
pos
- a list of ParameterOperando
- the input Object from which values are taken for the
evaluation
- Returns:
- an Operand containing the result of the evaluation
- Throws:
ExpressionException
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.
- Throws:
MalformedExpressionException
- if syntax error
ExpressionException
evaluate
public java.lang.String evaluate(java.lang.String op,
int start,
int length)
getOperatorString
public java.lang.String getOperatorString()
- Description copied from interface:
Operator
- Returns the String representing the operator in Java
- Returns:
- the String representing the operator in Java