java.lang.Object
- org.biojava.bio.seq.impl.LazyFilterFeatureHolder

All Implemented Interfaces:

FeatureHolder, Changeable
```
public class LazyFilterFeatureHolder
extends Object
implements FeatureHolder
```
FeatureHolder which lazily applies a specified filter to another FeatureHolder. This means that when you use a second filter to query the LazyFilterFeatureHolder, the underlying holder receives a single filter request with the two queries ANDed together.

Since:

1.3

Author:

Thomas Down

Nested Class Summary
- Nested classes/interfaces inherited from interface org.biojava.bio.seq.FeatureHolder
  FeatureHolder.EmptyFeatureHolder

Field Summary
- Fields inherited from interface org.biojava.bio.seq.FeatureHolder
  EMPTY_FEATURE_HOLDER, FEATURES, SCHEMA

Constructor Summary

Constructors
Constructor Description

LazyFilterFeatureHolder(FeatureHolder fh, FeatureFilter ff)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`addChangeListener(ChangeListener cl)`	Add a listener that will be informed of all changes.
`void`	`addChangeListener(ChangeListener cl, ChangeType ct)`	Add a listener that will be informed of changes of a given type.
`boolean`	`containsFeature(Feature f)`	Check if the feature is present in this holder.
`int`	`countFeatures()`	Count how many features are contained.
`Feature`	`createFeature(Feature.Template temp)`	Create a new Feature, and add it to this FeatureHolder.
`Iterator`	`features()`	Iterate over the features in no well defined order.
`FeatureHolder`	`filter(FeatureFilter ff)`	Query this set of features using a supplied `FeatureFilter`.
`FeatureHolder`	`filter(FeatureFilter ff, boolean recurse)`	Return a new FeatureHolder that contains all of the children of this one that passed the filter fc.
`protected ChangeSupport`	`getChangeSupport()`
`FeatureFilter`	`getSchema()`	Return a schema-filter for this `FeatureHolder`.
`protected boolean`	`hasListeners()`
`boolean`	`isUnchanging(ChangeType ct)`	A particular ChangeType can never be raised by this Changeable.
`void`	`removeChangeListener(ChangeListener cl)`	Remove a listener that was interested in all types of changes.
`void`	`removeChangeListener(ChangeListener cl, ChangeType ct)`	Remove a listener that was interested in a specific types of changes.
`void`	`removeFeature(Feature f)`	Remove a feature from this FeatureHolder.

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

- Constructor Detail
  - LazyFilterFeatureHolder
```
public LazyFilterFeatureHolder(FeatureHolder fh,
                               FeatureFilter ff)
```
- Method Detail
  - features
```
public Iterator features()
```
    Description copied from interface: FeatureHolder
    
    Iterate over the features in no well defined order.
    
    Specified by:
    
    features in interface FeatureHolder
    
    Returns:
    
    an Iterator
  - countFeatures
```
public int countFeatures()
```
    Description copied from interface: FeatureHolder
    
    Count how many features are contained.
    
    Specified by:
    
    countFeatures in interface FeatureHolder
    
    Returns:
    
    a positive integer or zero, equal to the number of features contained
  - containsFeature
```
public boolean containsFeature(Feature f)
```
    Description copied from interface: FeatureHolder
    
    Check if the feature is present in this holder.
    
    Specified by:
    
    containsFeature in interface FeatureHolder
    
    Parameters:
    
    f - the Feature to check
    
    Returns:
    
    true if f is in this set
  - filter
```
public FeatureHolder filter(FeatureFilter ff)
```
    Description copied from interface: FeatureHolder
    
    Query this set of features using a supplied FeatureFilter.
    
    Specified by:
    
    filter in interface FeatureHolder
    
    Parameters:
    
    ff - the FeatureFilter to apply.
    
    Returns:
    
    all features in this container which match filter.
  - filter
```
public FeatureHolder filter(FeatureFilter ff,
                            boolean recurse)
```
    Description copied from interface: FeatureHolder
    
    Return a new FeatureHolder that contains all of the children of this one that passed the filter fc. This method is scheduled for deprecation. Use the 1-arg filter instead.
    
    Specified by:
    
    filter in interface FeatureHolder
    
    Parameters:
    
    ff - the FeatureFilter to apply
    
    recurse - true if all features-of-features should be scanned, and a single flat collection of features returned, or false if just immediate children should be filtered.
  - createFeature
```
public Feature createFeature(Feature.Template temp)
                      throws ChangeVetoException,
                             BioException
```
    Description copied from interface: FeatureHolder
    
    Create a new Feature, and add it to this FeatureHolder. This method will generally only work on Sequences, and on some Features which have been attached to Sequences.
    
    Specified by:
    
    createFeature in interface FeatureHolder
    
    Throws:
    
    ChangeVetoException - if this FeatureHolder does not support creation of new features, or if the change was vetoed
    
    BioException - if something went wrong during creating the feature
  - removeFeature
```
public void removeFeature(Feature f)
                   throws ChangeVetoException,
                          BioException
```
    Description copied from interface: FeatureHolder
    
    Remove a feature from this FeatureHolder.
    
    Specified by:
    
    removeFeature in interface FeatureHolder
    
    Throws:
    
    ChangeVetoException - if this FeatureHolder does not support feature removal or if the change was vetoed
    
    BioException - if there was an error removing the feature
  - hasListeners
```
protected boolean hasListeners()
```
  - getChangeSupport
```
protected ChangeSupport getChangeSupport()
```
  - addChangeListener
```
public final void addChangeListener(ChangeListener cl)
```
    Description copied from interface: Changeable
    
    Add a listener that will be informed of all changes.
    
    Specified by:
    
    addChangeListener in interface Changeable
    
    Parameters:
    
    cl - the ChangeListener to add
  - addChangeListener
```
public final void addChangeListener(ChangeListener cl,
                                    ChangeType ct)
```
    Description copied from interface: Changeable
    
    Add a listener that will be informed of changes of a given type.
    
    Specified by:
    
    addChangeListener in interface Changeable
    
    Parameters:
    
    cl - the ChangeListener
    
    ct - the ChangeType it is to be informed of
  - removeChangeListener
```
public final void removeChangeListener(ChangeListener cl)
```
    Description copied from interface: Changeable
    
    Remove a listener that was interested in all types of changes.
    
    Specified by:
    
    removeChangeListener in interface Changeable
    
    Parameters:
    
    cl - a ChangeListener to remove
  - removeChangeListener
```
public final void removeChangeListener(ChangeListener cl,
                                       ChangeType ct)
```
    Description copied from interface: Changeable
    
    Remove a listener that was interested in a specific types of changes.
    
    Specified by:
    
    removeChangeListener in interface Changeable
    
    Parameters:
    
    cl - a ChangeListener to remove
    
    ct - the ChangeType that it was interested in
  - isUnchanging
```
public boolean isUnchanging(ChangeType ct)
```
    Description copied from interface: Changeable
    
    A particular ChangeType can never be raised by this Changeable.
    
    If this returns true, then it is guaranteed that change events of this type (and all child types) can never under any circumstances be fired by this Changeable instance. If it returns false, that does not mean that this type of event will or even can be raised, but that it is worth registering listeners incase.
    
    Specified by:
    
    isUnchanging in interface Changeable
    
    Parameters:
    
    ct - the ChangeType to check
    
    Returns:
    
    true if ChangeEvents of this type are guaranteed to never be fired
  - getSchema
```
public FeatureFilter getSchema()
```
    Description copied from interface: FeatureHolder
    
    Return a schema-filter for this FeatureHolder. This is a filter which all Features immediately contained by this FeatureHolder will match. It need not directly match their child features, but it can (and should!) provide information about them using FeatureFilter.OnlyChildren filters. In cases where there is no feature hierarchy, this can be indicated by including FeatureFilter.leaf in the schema filter.
    For the truly non-informative case, it is possible to return FeatureFilter.all. However, it is almost always possible to provide slightly more information that this. For example, Sequence objects should, at a minimum, return FeatureFilter.top_level. Feature objects should, as a minimum, return FeatureFilter.ByParent(new FeatureFilter.ByFeature(this)).
    
    Specified by:
    
    getSchema in interface FeatureHolder
    
    Returns:
    
    the schema filter

Class LazyFilterFeatureHolder

Nested Class Summary

Nested classes/interfaces inherited from interface org.biojava.bio.seq.FeatureHolder

Field Summary

Fields inherited from interface org.biojava.bio.seq.FeatureHolder

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

LazyFilterFeatureHolder

Method Detail

features

countFeatures

containsFeature

filter

filter

createFeature

removeFeature

hasListeners

getChangeSupport

addChangeListener

addChangeListener

removeChangeListener

removeChangeListener

isUnchanging

getSchema