Package com.im.df.api.dml

Class Operators.AllDataOperator

java.lang.Object

com.im.df.api.dml.DFOperator

com.im.df.api.dml.Operators.AllDataOperator

Enclosing class:

Operators

public static class Operators.AllDataOperator
extends DFOperator

Represents all data.

Constructor Summary

Constructors

Constructor	Description
AllDataOperator()

Method Summary

Modifier and Type	Method	Description
boolean	isFieldAcceptableAsOperand(DFField field)	This is just an utility method which must be implemented by subclasses.
java.lang.Object[]	parseOperands(DFField field, java.lang.String operands)
java.lang.String	toString(java.util.List<DFTerm> operands)

Methods inherited from class com.im.df.api.dml.DFOperator

correctNumberOfOperands, getDisplayName, getDisplayNameInExpression, getMaxOperands, getMinOperands, getPersistName, getStartingWith, getStartingWithOperator, getToStringPart, toString, validate

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

AllDataOperator

public AllDataOperator()

Method Detail

isFieldAcceptableAsOperand

public boolean isFieldAcceptableAsOperand(DFField field)

Description copied from class: DFOperator

This is just an utility method which must be implemented by subclasses. It tests if the given field is acceptable as operand for this DFOperator. It can return true even for fields which are recognized as invalid later. This is just rough test in the beginning of validation to filter inappropriate fields.

For example some operator takes two operands of different types (text, integer,...), but both must be of the same type. In this case this method returns true for all text, integer etc. fields, but if you use combination of [text, integer] as operands, it will be invalid.

Specified by:

isFieldAcceptableAsOperand in class DFOperator

Parameters:

field - The field to be tested

Returns:

True if field seems to be acceptable, false otherwise.

parseOperands

public java.lang.Object[] parseOperands(DFField field,
                                        java.lang.String operands)
                                 throws java.lang.IllegalArgumentException

Specified by:

parseOperands in class DFOperator

Throws:

java.lang.IllegalArgumentException

toString

public java.lang.String toString(java.util.List<DFTerm> operands)

Overrides:

toString in class DFOperator