Filter (Hibernate Generic DAO - Search 1.2.0 API)

java.lang.Object
- com.googlecode.genericdao.search.Filter

All Implemented Interfaces:

Serializable
```
public class Filter
extends Object
implements Serializable
```
A Filter is used by the Search class to specify a restriction on what results should be returned in the search. For example, if a filter Filter.equal("name","Paul") were added to the search, only objects with the property "name" equal to the string "Paul" would be returned.
Nested properties can also be specified, for example Filter.greaterThan("employee.age",65).

Author:

dwolverton

See Also:
Serialized Form

Property Summary

Properties
Type Property and Description

boolean isTakesNo

Properties
Type	Property and Description
`boolean`	`isTakesNo`

Field Summary

Fields
Modifier and Type	Field and Description
`static int`	`OP_ALL`
`static int`	`OP_AND`
`static int`	`OP_CUSTOM`
`static int`	`OP_EMPTY`
`static int`	`OP_EQUAL`
`static int`	`OP_GREATER_OR_EQUAL`
`static int`	`OP_GREATER_THAN`
`static int`	`OP_ILIKE`
`static int`	`OP_IN`
`static int`	`OP_LESS_OR_EQUAL`
`static int`	`OP_LESS_THAN`
`static int`	`OP_LIKE`
`static int`	`OP_NONE`
`static int`	`OP_NOT`
`static int`	`OP_NOT_EMPTY`
`static int`	`OP_NOT_EQUAL`
`static int`	`OP_NOT_IN`
`static int`	`OP_NOT_NULL`
`static int`	`OP_NULL`
`static int`	`OP_OR`
`static int`	`OP_SOME`
`protected int`	`operator` The type of comparison to do between the property and the value.
`protected String`	`property` The name of the property to filter on.
`static String`	`ROOT_ENTITY` Property string representing the root entity of the search.
`protected Object`	`value` The value to compare the property with.

Constructor Summary

Constructors
Constructor and Description

Filter()

Filter(String property, Object value)

Filter(String property, Object value, int operator)

Constructors
Constructor and Description
`Filter()`
`Filter(String property, Object value)`
`Filter(String property, Object value, int operator)`

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`add(Filter filter)` Used with OP_OR and OP_AND filters.
`static Filter`	`all(String property, Filter filter)` Create a new Filter using the ALL operator.
`static Filter`	`and(Filter... filters)` Create a new Filter using the AND operator.
`static Filter`	`custom(String expression)` Create a new Filter using a custom JPQL/HQL expression.
`static Filter`	`custom(String expression, Collection<?> values)` Create a new Filter using a custom JPQL/HQL expression.
`static Filter`	`custom(String expression, Object... values)` Create a new Filter using a custom JPQL/HQL expression.
`static Filter`	`equal(String property, Object value)` Create a new Filter using the == operator.
`boolean`	`equals(Object obj)`
`int`	`getOperator()`
`String`	`getProperty()`
`Object`	`getValue()`
`Collection<?>`	`getValuesAsCollection()` Returns the value as a Collection, converting if necessary.
`List<?>`	`getValuesAsList()` Returns the value as a List, converting if necessary.
`static Filter`	`greaterOrEqual(String property, Object value)` Create a new Filter using the >= operator.
`static Filter`	`greaterThan(String property, Object value)` Create a new Filter using the > operator.
`int`	`hashCode()`
`static Filter`	`ilike(String property, String value)` Create a new Filter using the ILIKE operator.
`static Filter`	`in(String property, Collection<?> value)` Create a new Filter using the IN operator.
`static Filter`	`in(String property, Object... value)` Create a new Filter using the IN operator.
`static Filter`	`isEmpty(String property)` Create a new Filter using the IS EMPTY operator.
`static Filter`	`isNotEmpty(String property)` Create a new Filter using the IS NOT EMPTY operator.
`static Filter`	`isNotNull(String property)` Create a new Filter using the IS NOT NULL operator.
`static Filter`	`isNull(String property)` Create a new Filter using the IS NULL operator.
`boolean`	`isTakesListOfSubFilters()`
`boolean`	`isTakesListOfValues()`
`boolean`	`isTakesNoProperty()`
`boolean`	`isTakesNoValue()`
`boolean`	`isTakesSingleSubFilter()`
`boolean`	`isTakesSingleValue()`
`static Filter`	`lessOrEqual(String property, Object value)` Create a new Filter using the <= operator.
`static Filter`	`lessThan(String property, Object value)` Create a new Filter using the < operator.
`static Filter`	`like(String property, String value)` Create a new Filter using the LIKE operator.
`static Filter`	`none(String property, Filter filter)` Create a new Filter using the NONE operator.
`static Filter`	`not(Filter filter)` Create a new Filter using the NOT operator.
`static Filter`	`notEqual(String property, Object value)` Create a new Filter using the != operator.
`static Filter`	`notIn(String property, Collection<?> value)` Create a new Filter using the NOT IN operator.
`static Filter`	`notIn(String property, Object... value)` Create a new Filter using the NOT IN operator.
`static Filter`	`or(Filter... filters)` Create a new Filter using the OR operator.
`void`	`remove(Filter filter)` Used with OP_OR and OP_AND filters.
`void`	`setOperator(int operator)`
`void`	`setProperty(String property)`
`void`	`setValue(Object value)`
`static Filter`	`some(String property, Filter filter)` Create a new Filter using the SOME operator.
`String`	`toString()`

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

- Property Detail
  - isTakesNo
    
    Returns:
    true if the operator does not require a property to be specified.
    AND, OR, NOT
- Field Detail
  - ROOT_ENTITY
```
public static final String ROOT_ENTITY
```
    Property string representing the root entity of the search. This is just the empty string ("").
    
    See Also:
    Constant Field Values
  - property
```
protected String property
```
    The name of the property to filter on. It may be nested. Examples: "name", "dateOfBirth", "employee.age", "employee.spouse.job.title"
  - value
```
protected Object value
```
    The value to compare the property with. Should be of a compatible type with the property. Examples: "Fred", new Date(), 45
  - operator
```
protected int operator
```
    The type of comparison to do between the property and the value. The options are limited to the integer constants on this class: OP_EQAUL, OP_NOT_EQUAL, OP_LESS_THAN, OP_GREATER_THAN, LESS_OR_EQUAL, OP_GREATER_OR_EQUAL, OP_IN, OP_NOT_IN, OP_LIKE, OP_ILIKE, OP_NULL, OP_NOT_NULL, OP_EMPTY, OP_NOT_EMPTY, OP_SOME, OP_ALL, OP_NONE, OP_AND, OP_OR, OP_NOT .
  - OP_EQUAL
```
public static final int OP_EQUAL
```
    See Also:
    Constant Field Values
  - OP_NOT_EQUAL
```
public static final int OP_NOT_EQUAL
```
    See Also:
    Constant Field Values
  - OP_LESS_THAN
```
public static final int OP_LESS_THAN
```
    See Also:
    Constant Field Values
  - OP_GREATER_THAN
```
public static final int OP_GREATER_THAN
```
    See Also:
    Constant Field Values
  - OP_LESS_OR_EQUAL
```
public static final int OP_LESS_OR_EQUAL
```
    See Also:
    Constant Field Values
  - OP_GREATER_OR_EQUAL
```
public static final int OP_GREATER_OR_EQUAL
```
    See Also:
    Constant Field Values
  - OP_LIKE
```
public static final int OP_LIKE
```
    See Also:
    Constant Field Values
  - OP_ILIKE
```
public static final int OP_ILIKE
```
    See Also:
    Constant Field Values
  - OP_IN
```
public static final int OP_IN
```
    See Also:
    Constant Field Values
  - OP_NOT_IN
```
public static final int OP_NOT_IN
```
    See Also:
    Constant Field Values
  - OP_NULL
```
public static final int OP_NULL
```
    See Also:
    Constant Field Values
  - OP_NOT_NULL
```
public static final int OP_NOT_NULL
```
    See Also:
    Constant Field Values
  - OP_EMPTY
```
public static final int OP_EMPTY
```
    See Also:
    Constant Field Values
  - OP_NOT_EMPTY
```
public static final int OP_NOT_EMPTY
```
    See Also:
    Constant Field Values
  - OP_AND
```
public static final int OP_AND
```
    See Also:
    Constant Field Values
  - OP_OR
```
public static final int OP_OR
```
    See Also:
    Constant Field Values
  - OP_NOT
```
public static final int OP_NOT
```
    See Also:
    Constant Field Values
  - OP_SOME
```
public static final int OP_SOME
```
    See Also:
    Constant Field Values
  - OP_ALL
```
public static final int OP_ALL
```
    See Also:
    Constant Field Values
  - OP_NONE
```
public static final int OP_NONE
```
    See Also:
    Constant Field Values
  - OP_CUSTOM
```
public static final int OP_CUSTOM
```
    See Also:
    Constant Field Values
- Constructor Detail
  - Filter
```
public Filter()
```
  - Filter
```
public Filter(String property,
      Object value,
      int operator)
```
  - Filter
```
public Filter(String property,
      Object value)
```
- Method Detail
  - equal
```
public static Filter equal(String property,
           Object value)
```
    Create a new Filter using the == operator.
  - lessThan
```
public static Filter lessThan(String property,
              Object value)
```
    Create a new Filter using the < operator.
  - greaterThan
```
public static Filter greaterThan(String property,
                 Object value)
```
    Create a new Filter using the > operator.
  - lessOrEqual
```
public static Filter lessOrEqual(String property,
                 Object value)
```
    Create a new Filter using the <= operator.
  - greaterOrEqual
```
public static Filter greaterOrEqual(String property,
                    Object value)
```
    Create a new Filter using the >= operator.
  - in
```
public static Filter in(String property,
        Collection<?> value)
```
    Create a new Filter using the IN operator.
    This takes a variable number of parameters. Any number of values can be specified.
  - in
```
public static Filter in(String property,
        Object... value)
```
    Create a new Filter using the IN operator.
    This takes a variable number of parameters. Any number of values can be specified.
  - notIn
```
public static Filter notIn(String property,
           Collection<?> value)
```
    Create a new Filter using the NOT IN operator.
    This takes a variable number of parameters. Any number of values can be specified.
  - notIn
```
public static Filter notIn(String property,
           Object... value)
```
    Create a new Filter using the NOT IN operator.
    This takes a variable number of parameters. Any number of values can be specified.
  - like
```
public static Filter like(String property,
          String value)
```
    Create a new Filter using the LIKE operator.
  - ilike
```
public static Filter ilike(String property,
           String value)
```
    Create a new Filter using the ILIKE operator.
  - notEqual
```
public static Filter notEqual(String property,
              Object value)
```
    Create a new Filter using the != operator.
  - isNull
```
public static Filter isNull(String property)
```
    Create a new Filter using the IS NULL operator.
  - isNotNull
```
public static Filter isNotNull(String property)
```
    Create a new Filter using the IS NOT NULL operator.
  - isEmpty
```
public static Filter isEmpty(String property)
```
    Create a new Filter using the IS EMPTY operator.
  - isNotEmpty
```
public static Filter isNotEmpty(String property)
```
    Create a new Filter using the IS NOT EMPTY operator.
  - and
```
public static Filter and(Filter... filters)
```
    Create a new Filter using the AND operator.
    This takes a variable number of parameters. Any number of Filters can be specified.
  - or
```
public static Filter or(Filter... filters)
```
    Create a new Filter using the OR operator.
    This takes a variable number of parameters. Any number of Filters can be specified.
  - not
```
public static Filter not(Filter filter)
```
    Create a new Filter using the NOT operator.
  - some
```
public static Filter some(String property,
          Filter filter)
```
    Create a new Filter using the SOME operator.
  - all
```
public static Filter all(String property,
         Filter filter)
```
    Create a new Filter using the ALL operator.
  - none
```
public static Filter none(String property,
          Filter filter)
```
    Create a new Filter using the NONE operator. This is equivalent to NOT SOME.
  - custom
```
public static Filter custom(String expression)
```
    Create a new Filter using a custom JPQL/HQL expression. This can be any valid where-clause type expression. Reference properties by wrapping them with curly braces ({}).
    Here are some examples:
```
 // Referencing a property in a custom expression
 Filter.custom("{serialNumber} like '%4780%'");
 // comparing two properties
 Filter.custom("{parent.spotCount} > {spotCount} + 4");
 // A constant
 Filter.custom("1 = 1");
 // A function
 Filter.custom("{dueDate} > current_date()");
 // A subquery
 Filter.custom("{id} in (select pc.cat_id from popular_cats pc where pc.color = 'blue')");
 
```
    Parameters:
    expression - JPQL/HQL where-clause expression
  - custom
```
public static Filter custom(String expression,
            Object... values)
```
    Create a new Filter using a custom JPQL/HQL expression. This can be any valid where-clause type expression. Reference properties by wrapping them with curly braces ({}). The expression can also contain place holders for the Filter values; these are indicated by JPQL-style positional parameters (i.e. a question mark (?) followed by a number indicating the parameter order, starting with one).
    Here are some examples:
```
 // Referencing a property in a custom expression
 Filter.custom("{serialNumber} like ?1", "%4780%");
 // comparing two properties
 Filter.custom("{parent.spotCount} + ?1 > {spotCount} + ?2", 0, 4);
 // A constant
 Filter.custom("?1 = ?2", 1, 1);
 // A function
 Filter.custom("?1 > current_date()", someDate);
 // A subquery
 Filter.custom("{id} in (select pc.cat_id from popular_cats pc where pc.color = ?1)", "blue");
 
```
    Parameters:
    expression - JPQL/HQL where-clause expression
    values - one or more values to fill in the numbered placeholders in the expression
  - custom
```
public static Filter custom(String expression,
            Collection<?> values)
```
    Create a new Filter using a custom JPQL/HQL expression. This can be any valid where-clause type expression. Reference properties by wrapping them with curly braces ({}). The expression can also contain place holders for the Filter values; these are indicated by JPQL-style positional parameters (i.e. a question mark (?) followed by a number indicating the parameter order, starting with one).
    Here are some examples:
```
 // Referencing a property in a custom expression
 Filter.custom("{serialNumber} like ?1", Collections.singleton("%4780%"));
 // comparing two properties
 Filter.custom("{parent.spotCount} + ?1 > {spotCount} + ?2", Arrays.asList(0, 4));
 // A constant
 Filter.custom("?1 = ?2", Arrays.asList(1, 1));
 // A function
 Filter.custom("?1 > current_date()", Collections.singleton(someDate));
 // A subquery
 Filter.custom("{id} in (select pc.cat_id from popular_cats pc where pc.color = ?1)", Collections.singleton("blue"));
 
```
    Parameters:
    expression - JPQL/HQL where-clause expression
    values - one or more values to fill in the numbered placeholders in the expression
  - add
```
public void add(Filter filter)
```
    Used with OP_OR and OP_AND filters. These filters take a collection of filters as their value. This method adds a filter to that list.
  - remove
```
public void remove(Filter filter)
```
    Used with OP_OR and OP_AND filters. These filters take a collection of filters as their value. This method removes a filter from that list.
  - getProperty
```
public String getProperty()
```
  - setProperty
```
public void setProperty(String property)
```
  - getValue
```
public Object getValue()
```
  - setValue
```
public void setValue(Object value)
```
  - getOperator
```
public int getOperator()
```
  - setOperator
```
public void setOperator(int operator)
```
  - getValuesAsList
```
public List<?> getValuesAsList()
```
    Returns the value as a List, converting if necessary. If the value is a List, it will be returned directly. If it is any other Collection type or if it is an Array, an ArrayList will be returned with all the same elements. If the value is any other non-null value, a List containing just that one value will be returned. If it is null, null will be returned.
  - getValuesAsCollection
```
public Collection<?> getValuesAsCollection()
```
    Returns the value as a Collection, converting if necessary. If the value is a Collection, it will be returned directly. If it is an Array, an ArrayList will be returned with all the same elements. If the value is any other non-null value, a Set containing just that one value will be returned. If it is null, null will be returned.
    
    Returns:
  - isTakesSingleValue
```
public boolean isTakesSingleValue()
```
    Returns:
    true if the operator should have a single value specified.
    EQUAL, NOT_EQUAL, LESS_THAN, LESS_OR_EQUAL, GREATER_THAN, GREATER_OR_EQUAL, LIKE, ILIKE
  - isTakesListOfValues
```
public boolean isTakesListOfValues()
```
    Returns:
    true if the operator should have a list of values specified.
    IN, NOT_IN
  - isTakesNoValue
```
public boolean isTakesNoValue()
```
    Returns:
    true if the operator does not require a value to be specified.
    NULL, NOT_NULL, EMPTY, NOT_EMPTY
  - isTakesSingleSubFilter
```
public boolean isTakesSingleSubFilter()
```
    Returns:
    true if the operator should have a single Filter specified for the value.
    NOT, ALL, SOME, NONE
  - isTakesListOfSubFilters
```
public boolean isTakesListOfSubFilters()
```
    Returns:
    true if the operator should have a list of Filters specified for the value.
    AND, OR
  - isTakesNoProperty
```
public boolean isTakesNoProperty()
```
    Returns:
    true if the operator does not require a property to be specified.
    AND, OR, NOT
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class Object
  - equals
```
public boolean equals(Object obj)
```
    Overrides:
    
    equals in class Object
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object

Class Filter

Property Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Property Detail

isTakesNo

Field Detail

ROOT_ENTITY

property

value

operator

OP_EQUAL

OP_NOT_EQUAL

OP_LESS_THAN

OP_GREATER_THAN

OP_LESS_OR_EQUAL

OP_GREATER_OR_EQUAL

OP_LIKE

OP_ILIKE

OP_IN

OP_NOT_IN

OP_NULL

OP_NOT_NULL

OP_EMPTY

OP_NOT_EMPTY

OP_AND

OP_OR

OP_NOT

OP_SOME

OP_ALL

OP_NONE

OP_CUSTOM

Constructor Detail

Filter

Filter

Filter

Method Detail

equal

lessThan

greaterThan

lessOrEqual

greaterOrEqual

in

in

notIn

notIn

like

ilike

notEqual

isNull

isNotNull

isEmpty

isNotEmpty

and

or

not

some

all

none

custom

custom

custom

add

remove

getProperty

setProperty

getValue

setValue

getOperator

setOperator

getValuesAsList

getValuesAsCollection

isTakesSingleValue

isTakesListOfValues

isTakesNoValue

isTakesSingleSubFilter

isTakesListOfSubFilters

isTakesNoProperty