javax.swing
class RowFilter

java.lang.Object javax.swing.RowFilter

public abstract class RowFilter
extends Object

RowFilter is used to filter out entries from the model so that they are not shown in the view. For example, a RowFilter associated with a JTable might only allow rows that contain a column with a specific string. The meaning of entry depends on the component type. For example, when a filter is associated with a JTable, an entry corresponds to a row; when associated with a JTree, an entry corresponds to a node.

Subclasses must override the include method to indicate whether the entry should be shown in the view. The Entry argument can be used to obtain the values in each of the columns in that entry. The following example shows an include method that allows only entries containing one or more values starting with the string "a":

 RowFilter<Object,Object> startsWithAFilter = new RowFilter<Object,Object>() {
   public boolean include(Entry<? extends Object, ? extends Object> entry) {
     for (int i = entry.getValueCount() - 1; i >= 0; i--) {
       if (entry.getStringValue(i).startsWith("a")) {
         // The value starts with "a", include it
         return true;
       }
     }
     // None of the columns start with "a"; return false so that this
     // entry is not shown
     return false;
   }
 };
 

 RowFilter<PersonModel,Integer> ageFilter = new RowFilter<PersonModel,Integer>() {
   public boolean include(Entry<? extends PersonModel, ? extends Integer> entry) {
     PersonModel personModel = entry.getModel();
     Person person = personModel.getPerson(entry.getIdentifier());
     if (person.getAge() > 20) {
       // Returning true indicates this row should be shown.
       return true;
     }
     // Age is <= 20, don't show it.
     return false;
   }
 };
 PersonModel model = createPersonModel();
 TableRowSorter<PersonModel> sorter = new TableRowSorter<PersonModel>(model);
 sorter.setRowFilter(ageFilter);
 

RowFilter

public RowFilter()

andFilter

public static RowFilter andFilter(Iterable filters)

Returns a RowFilter that includes entries if all of the supplied filters include the entry.

The following example creates a RowFilter that will include any entries containing the string "foo" and the string "bar":

   List<RowFilter<Object,Object>> filters = new ArrayList<RowFilter<Object,Object>>(2);
   filters.add(RowFilter.regexFilter("foo"));
   filters.add(RowFilter.regexFilter("bar"));
   RowFilter<Object,Object> fooBarFilter = RowFilter.andFilter(filters);
 

Parameters:

filters - the RowFilters to test

Returns:

a RowFilter implementing the specified criteria

dateFilter

public static RowFilter dateFilter(RowFilter.ComparisonType type,
                                   Date date,
                                   int[] indices)

Returns a RowFilter that includes entries that have at least one Date value meeting the specified criteria. For example, the following RowFilter includes only entries with at least one date value after the current date:

   RowFilter.dateFilter(ComparisonType.AFTER, new Date());
 

Parameters:

type - the type of comparison to perform

date - the date to compare against

indices - the indices of the values to check. If not supplied all values are evaluated

Returns:

a RowFilter implementing the specified criteria

include

public abstract boolean include(RowFilter.Entry entry)

Returns true if the specified entry should be shown; returns false if the entry should be hidden.

The entry argument is valid only for the duration of the invocation. Using entry after the call returns results in undefined behavior.

Parameters:

entry - a non-null object that wraps the underlying object from the model

Returns:

true if the entry should be shown

notFilter

public static RowFilter notFilter(RowFilter filter)

Returns a RowFilter that includes entries if the supplied filter does not include the entry.

Parameters:

filter - the RowFilter to negate

Returns:

a RowFilter implementing the specified criteria

numberFilter

public static RowFilter numberFilter(RowFilter.ComparisonType type,
                                     Number number,
                                     int[] indices)

Returns a RowFilter that includes entries that have at least one Number value meeting the specified criteria. For example, the following filter will only include entries with at least one number value equal to 10:

   RowFilter.numberFilter(ComparisonType.EQUAL, 10);
 

Parameters:

type - the type of comparison to perform

number

indices - the indices of the values to check. If not supplied all values are evaluated

Returns:

a RowFilter implementing the specified criteria

orFilter

public static RowFilter orFilter(Iterable filters)

Returns a RowFilter that includes entries if any of the supplied filters includes the entry.

The following example creates a RowFilter that will include any entries containing the string "foo" or the string "bar":

   List<RowFilter<Object,Object>> filters = new ArrayList<RowFilter<Object,Object>>(2);
   filters.add(RowFilter.regexFilter("foo"));
   filters.add(RowFilter.regexFilter("bar"));
   RowFilter<Object,Object> fooBarFilter = RowFilter.orFilter(filters);
 

Parameters:

filters - the RowFilters to test

Returns:

a RowFilter implementing the specified criteria

regexFilter

public static RowFilter regexFilter(String regex,
                                    int[] indices)

Returns a RowFilter that uses a regular expression to determine which entries to include. Only entries with at least one matching value are included. For example, the following creates a RowFilter that includes entries with at least one value starting with "a":

   RowFilter.regexFilter("^a");
 

The returned filter uses {@link java.util.regex.Matcher#find} to test for inclusion. To test for exact matches use the characters '^' and '$' to match the beginning and end of the string respectively. For example, "^foo$" includes only rows whose string is exactly "foo" and not, for example, "food". See {@link java.util.regex.Pattern} for a complete description of the supported regular-expression constructs.

Parameters:

regex - the regular expression to filter on

indices - the indices of the values to check. If not supplied all values are evaluated

Returns:

a RowFilter implementing the specified criteria