com.pow2.dao
Class Condition

java.lang.Object
  com.pow2.dao.Condition

public class Condition

extends Object

Utility class for build query conditions.

Version:

$Id: Condition.java,v 1.1.1.1 2004/08/31 20:22:46 foxat Exp $

Author:

Luca Fossato

Field Summary

static String	AND and boolean operator
protected org.apache.log4j.Category	cat Log4J category
static String	EMPTY empty string
static String	EQUAL equal operator
static String	LIKE like operator
static String	NOT_EQUAL not equal operator
static String	NOT_LIKE not like operator
static String	NULL null
static String	OR or boolean operator

Constructor Summary

Condition()
Default constructor.

Condition(String attributeName, String op, String attributeValue, boolean encloseInBrackets)
Constructor.

Method Summary

Condition	add(String booleanOp, Condition cnd, boolean encloseInBrackets) Add the input Condition object to the current condition.
Condition	add(String attributeName, String op, String attributeValue, boolean encloseInBrackets) Add a condition to the global WHERE clause.
Condition	add(String booleanOp, String attributeName, String op, String attributeValue, boolean encloseInBrackets) Add a condition to the global WHERE clause.
void	clear() Clear the internal condition string.
Condition	encloseInBrackets() Enclose the input condition in brackets
boolean	isEmpty() Test if the condition is empty
String	toString() Get the string representation of the current condition.

Methods inherited from class java.lang.Object

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

Field Detail

cat

protected org.apache.log4j.Category cat

Log4J category

EQUAL

public static final String EQUAL

equal operator

See Also:

Constant Field Values

NOT_EQUAL

public static final String NOT_EQUAL

not equal operator

See Also:

Constant Field Values

LIKE

public static final String LIKE

like operator

See Also:

Constant Field Values

NOT_LIKE

public static final String NOT_LIKE

not like operator

See Also:

Constant Field Values

AND

public static final String AND

and boolean operator

See Also:

Constant Field Values

OR

public static final String OR

or boolean operator

See Also:

Constant Field Values

EMPTY

public static final String EMPTY

empty string

See Also:

Constant Field Values

NULL

public static final String NULL

null

See Also:

Constant Field Values

Constructor Detail

Condition

public Condition()

Default constructor.

Condition

public Condition(String attributeName,
                 String op,
                 String attributeValue,
                 boolean encloseInBrackets)

Constructor.
Add the condition builded usong the input attributeName, operator, attributeValue to the global WHERE clause.

Parameters:

attributeName - the name of the element used by the binary operator op

op - the binary operator that binds the attributeValue to the attributeName.

attributeValue - the value bond to the input attribute

encloseInBrackets - true if the resulting condition statements must be enclosed in brackets; false otherwise

Method Detail

add

public Condition add(String booleanOp,
                     Condition cnd,
                     boolean encloseInBrackets)

Add the input Condition object to the current condition.

Parameters:

booleanOp - the boolean operator used to bind the input condition object with the current condition

cnd - the input Condition object to add to the current condition

encloseInBrackets - true if the resulting condition statements must be enclosed in brackets; false otherwise

Returns:

the current Condition object

add

public Condition add(String attributeName,
                     String op,
                     String attributeValue,
                     boolean encloseInBrackets)

Add a condition to the global WHERE clause.

Parameters:

attributeName - the name of the element used by the binary operator op

op - the binary operator that binds the attributeValue to the attributeName.
Supported binary operators are:

• EQUAL
• NOT_EQUAL
• LIKE

attributeValue - the value bond to the input attribute

encloseInBrackets - true if the resulting condition statements must be enclosed in brackets; false otherwise

Returns:

the current Condition object

add

public Condition add(String booleanOp,
                     String attributeName,
                     String op,
                     String attributeValue,
                     boolean encloseInBrackets)

Add a condition to the global WHERE clause.

Parameters:

booleanOp - the boolean operator that adds this condition statement to the previous condition statement (if any) of the the global WHERE clause
Supported boolean operators are:

• AND
• OR

attributeName - the name of the element used by the binary operator op

op - the binary operator that binds the attributeValue to the attributeName.
Supported binary operators are:

• EQUAL
• NOT_EQUAL
• LIKE

attributeValue - the value bond to the input attribute

Returns:

the current Condition object

clear

public void clear()

Clear the internal condition string.

isEmpty

public boolean isEmpty()

Test if the condition is empty

Returns:

true if this condition is empty; false otherwise

toString

public String toString()

Get the string representation of the current condition.

Returns:

the string representation of the current condition

encloseInBrackets

public Condition encloseInBrackets()

Enclose the input condition in brackets

Returns:

Description of the Return Value