## org.biojava.bio.seq.projection
Class ProjectedFeature

    java.lang.Object
      org.biojava.bio.seq.projection.ProjectedFeature

All Implemented Interfaces:
  Annotatable, Feature, FeatureHolder, Projection, Changeable

    public abstract class ProjectedFeature

extends Object
implements Feature, Projection

Internal class used by ProjectionEngine to wrap Feature objects. This is not for you. This is the base class that the projection engine extends. If you modify this you will modify every projected feature. That is probably a bad thing.

Since:
  1.1
Author:
  Thomas Down, Matthew Pocock

Nested Class Summary

Nested classes/interfaces inherited from interface org.biojava.bio.seq.Feature
`Feature.ByLocationComparator, Feature.Template`

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

Nested classes/interfaces inherited from interface org.biojava.bio.Annotatable
`Annotatable.AnnotationForwarder`

Field Summary

Fields inherited from interface org.biojava.bio.seq.Feature
`byLocationOrder, LOCATION, PROPERTY_DATA_KEY, SOURCE, SOURCETERM, TYPE, TYPETERM`

Fields inherited from interface org.biojava.bio.seq.FeatureHolder
`EMPTY_FEATURE_HOLDER, FEATURES, SCHEMA`

Fields inherited from interface org.biojava.bio.Annotatable
`ANNOTATION`

Constructor Summary
`ProjectedFeature(Feature f, ProjectionContext ctx)`

Method Summary
`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.
`boolean` `equals(Object o)`
`Iterator` `features()` Iterate over any child features which are held by this feature.
`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.
`FeatureHolder` `getParent()` Return the `FeatureHolder` to which this feature has been attached.
`protected FeatureHolder` `getProjectedFeatures()`
`ProjectionContext` `getProjectionContext()`
`Sequence` `getSequence()` Return the `Sequence` object to which this feature is (ultimately) attached.
`SymbolList` `getSymbols()` Return a list of symbols that are contained in this feature.
`Feature` `getViewedFeature()`
`int` `hashCode()`
`boolean` `isUnchanging(ChangeType ct)` A particular ChangeType can never be raised by this Changeable.
`Feature.Template` `makeTemplate()` Create a new Template that could be used to generate a feature identical to this one.
`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, finalize, getClass, notify, notifyAll, toString, wait, wait, wait`

Methods inherited from interface org.biojava.bio.seq.Feature
`getLocation, getSource, getSourceTerm, getType, getTypeTerm, setLocation, setSource, setSourceTerm, setType, setTypeTerm`

Methods inherited from interface org.biojava.bio.seq.FeatureHolder
`getSchema`

Methods inherited from interface org.biojava.bio.Annotatable
`getAnnotation`

Constructor Detail

### ProjectedFeature

    public ProjectedFeature(Feature f,
                            ProjectionContext ctx)

Method Detail

### getViewedFeature

    public Feature getViewedFeature()

  Specified by:
    `getViewedFeature` in interface `Projection`

### getProjectionContext

    public ProjectionContext getProjectionContext()

  Specified by:
    `getProjectionContext` in interface `Projection`

### getSequence

    public Sequence getSequence()

  Description copied from interface: `Feature`
  Return the `Sequence` object to which this feature is (ultimately) attached. For top level features, this will be equal to the `FeatureHolder` returned by `getParent`.

  Specified by:
    `getSequence` in interface `Feature`
  Returns:
    the ultimate parent Sequence

### getParent

    public FeatureHolder getParent()

  Description copied from interface: `Feature`
  Return the `FeatureHolder` to which this feature has been attached. This will be a `Sequence` object for top level features, and a `Feature` object for features further down the tree.

  Specified by:
    `getParent` in interface `Feature`

### getSymbols

    public SymbolList getSymbols()

  Description copied from interface: `Feature`
  Return a list of symbols that are contained in this feature.

  The symbols may not be contiguous in the original sequence, but they will be concatenated together in the resulting SymbolList.

  The order of the Symbols within the resulting symbol list will be according to the concept of ordering within the location object.

  If the feature location is modified then this does not modify any SymbolList produced by earlier invocations of this method.

  Specified by:
    `getSymbols` in interface `Feature`
  Returns:
    a SymbolList containing each symbol of the parent sequence contained within this feature in the order they appear in the parent

### 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

### getProjectedFeatures

    protected FeatureHolder getProjectedFeatures()

### features

    public Iterator features()

  Description copied from interface: `Feature`
  Iterate over any child features which are held by this feature. The order of iteration MAY be significant for some types of Feature.

  Specified by:
    `features` in interface `Feature`
  Specified by:
    `features` in interface `FeatureHolder`
  Returns:
    an Iterator

### 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

### makeTemplate

    public Feature.Template makeTemplate()

  Description copied from interface: `Feature`
  Create a new Template that could be used to generate a feature identical to this one. The fields of the template can be edited without changing the feature.

  Specified by:
    `makeTemplate` in interface `Feature`
  Returns:
    a new Template that would make a feature like this one

### hashCode

    public int hashCode()

  Overrides:
    `hashCode` in class `Object`

### equals

    public boolean equals(Object o)

  Overrides:
    `equals` in class `Object`

### addChangeListener

    public 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

### removeChangeListener

    public 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

### addChangeListener

    public 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 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