PresentFilter (spring-ldap-core 2.4.1 API)

java.lang.Object
- org.springframework.ldap.filter.AbstractFilter
- - org.springframework.ldap.filter.PresentFilter

All Implemented Interfaces:

Filter
```
public class PresentFilter
extends AbstractFilter
```
Filter that allows the user to check for the existence of a attribute. For an attribute to be 'present' it must contain a value. Attributes that do not contain a value are 'NOT present'. To filter on attributes that are 'NOT present' use the NotPresentFilter or use this filter in combination with a NotFilter .
```
 PresentFilter filter = new PresentFilter("foo");
 System.out.println(filter.encode());
 
```
would result in:
```
  (foo=*)
 
```

Constructor Summary

Constructors
Constructor Description

PresentFilter(java.lang.String attribute)
Creates a new instance of a present filter for a particular attribute.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`java.lang.StringBuffer`	`encode(java.lang.StringBuffer buff)`	Encodes the filter to a StringBuffer.
`boolean`	`equals(java.lang.Object o)`	All filters must implement equals.
`int`	`hashCode()`	All filters must implement hashCode.

Methods inherited from class org.springframework.ldap.filter.AbstractFilter
encode, toString

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - PresentFilter
```
public PresentFilter(java.lang.String attribute)
```
    Creates a new instance of a present filter for a particular attribute.
    
    Parameters:
    
    attribute - the attribute expected to be present (ie, contains a value).
- Method Detail
  - encode
```
public java.lang.StringBuffer encode(java.lang.StringBuffer buff)
```
    Description copied from interface: Filter
    
    Encodes the filter to a StringBuffer.
    
    Parameters:
    
    buff - The StringBuffer to encode the filter to
    
    Returns:
    
    The same StringBuffer as was given
  - equals
```
public boolean equals(java.lang.Object o)
```
    Description copied from interface: Filter
    
    All filters must implement equals.
    
    Specified by:
    
    equals in interface Filter
    
    Overrides:
    
    equals in class java.lang.Object
    
    Returns:
    
    true if the objects are equal.
  - hashCode
```
public int hashCode()
```
    Description copied from interface: Filter
    
    All filters must implement hashCode.
    
    Specified by:
    
    hashCode in interface Filter
    
    Overrides:
    
    hashCode in class java.lang.Object
    
    Returns:
    
    the hash code according to the contract in Object.hashCode()