org.objectweb.medor.expression.lib
Class TypeConverter
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.BasicUnaryOperator
org.objectweb.medor.expression.lib.TypeConverter
- All Implemented Interfaces:
- org.objectweb.medor.clone.api.Cloneable, java.lang.Cloneable, Expression, Operator, java.io.Serializable, UnaryOperator
- public class TypeConverter
- extends BasicUnaryOperator
This unary operator permit to change the type of an expression to another.
It is a kind of cast operation.
- Author:
- S.Chassande-Barrioz
- 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 |
Constructor Summary |
TypeConverter(Expression operand,
org.objectweb.jorm.type.api.PType newType)
Builds a TypeConverter. |
TypeConverter(org.objectweb.jorm.type.api.PType newType)
Builds a TypeConverter. |
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 |
Methods inherited from interface org.objectweb.medor.clone.api.Cloneable |
clone |
TypeConverter
public TypeConverter(org.objectweb.jorm.type.api.PType newType)
throws MalformedExpressionException
- Builds a TypeConverter.
- Parameters:
newType
- is the new PType of the expression. (cannot be null).
TypeConverter
public TypeConverter(Expression operand,
org.objectweb.jorm.type.api.PType newType)
throws MalformedExpressionException
- Builds a TypeConverter.
- Parameters:
operand
- is the sub expression which the type must be converted.newType
- is the new PType of the expression. (cannot be null).
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
evaluate
public Operand evaluate(ParameterOperand[] values,
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:
values
- 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