de.intarsys.pdf.cos
Class COSCompositeObject

java.lang.Object
  de.intarsys.pdf.cos.COSDocumentElement
      de.intarsys.pdf.cos.COSObject
          de.intarsys.pdf.cos.COSCompositeObject

All Implemented Interfaces:

ICOSContainer, ICOSExceptionHandler, de.intarsys.tools.attribute.IAttributeSupport, de.intarsys.tools.component.ISaveStateSupport

Direct Known Subclasses:

COSArray, COSDictionary, COSObjectProxy, COSStream

public abstract class COSCompositeObject
extends COSObject
implements ICOSContainer, de.intarsys.tools.attribute.IAttributeSupport

A superclass implementation for all containers of other COSObject instances.

Field Summary

Fields inherited from class de.intarsys.pdf.cos.COSObject

CONSTANT_CONTAINER, NULL_CONTAINER, SLOT_CONTAINER

Method Summary

void	addObjectListener(ICOSObjectListener listener) Add a listener for object changes.
ICOSContainer	associate(ICOSContainer newContainer, COSObject object) It is the responsibility of the current container to create the association with the new one.
COSDocumentElement	containable(COSObject object) The stand-in to be used when object should be contained in a container.
COSObject	copyDeep() Make a deep copy of the receiver within the same document.
COSObject	copyDeep(Map copied) Make a deep copy of the receiver within the same document.
ICOSContainer	disassociate(ICOSContainer oldContainer, COSObject object) It is the responsibility of the current container to remove the association from the old one.
Object	getAttribute(Object key)
void	harden(COSObject object) Propagate up the containment hierarchy
boolean	isObjectListenerAvailable() true if an ICOSObjectListener is registered.
boolean	isPrimitive() Answer true if this object is of a primitive type
boolean	mayBeSwapped() true if this object may be swapped from memory by the garbage collector.
int	referenceCount() The number of references to the contained object.
COSIndirectObject	referenceIndirect(COSObject object) Change the reference to the object contained in this to an indirect one via reference.
void	register(COSDocumentElement object) It is the responsibility of the active container to register object in its data structures.
Object	removeAttribute(Object key)
void	removeObjectListener(ICOSObjectListener listener) Remove a listener for object changes.
ICOSContainer	restoreStateContainer(ICOSContainer pContainer) Restore the save state for the container.
ICOSContainer	saveStateContainer() Create a save state for the container when saving the COSObject state.
Object	setAttribute(Object key, Object value)
void	soften(COSObject object) Propagate up the containment hierarchy
void	willChange(COSObject change) Propagate a change from a COSObject down in the hierarchy.

Methods inherited from class de.intarsys.pdf.cos.COSObject

asArray, asBoolean, asDictionary, asFixed, asInteger, asName, asNull, asNumber, asStream, asString, basicIterator, beConstant, beIndirect, containable, copyOptional, copyShallow, copySubGraph, dereference, getContainer, getDoc, getIndirectObject, getValueBoolean, getValueBytes, getValueFloat, getValueInteger, getValueString, harden, isDangling, isIndirect, isNull, isNumber, isSwapped, iterator, restoreState, soften, stringValue, toString

Methods inherited from class de.intarsys.pdf.cos.COSDocumentElement

accept, handleException, isReference

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface de.intarsys.pdf.cos.ICOSContainer

getDoc

Methods inherited from interface de.intarsys.tools.component.ISaveStateSupport

saveState

Method Detail

addObjectListener

public void addObjectListener(ICOSObjectListener listener)

Description copied from class: COSObject

Add a listener for object changes.

Specified by:

addObjectListener in class COSObject

Parameters:

listener - The listener to be informed about changes.

associate

public ICOSContainer associate(ICOSContainer newContainer,
                               COSObject object)

Description copied from interface: ICOSContainer

It is the responsibility of the current container to create the association with the new one. The table shows the available transitions | composite | indirect | | constant | n.a. | n.a. | (always copied before by "containable") null | ok | ok | composite | error | ok | indirect | ok | ok |

Specified by:

associate in interface ICOSContainer

Returns:

The resulting ICOSContainer for object

containable

public COSDocumentElement containable(COSObject object)

Description copied from interface: ICOSContainer

The stand-in to be used when object should be contained in a container. This is either the object itself or the COSIndirectObject to it.

Specified by:

containable in interface ICOSContainer

Parameters:

object - THe object whose containable is requested.

Returns:

The stand-in to be used when object should be contained in a container.

copyDeep

public final COSObject copyDeep()

Description copied from class: COSObject

Make a deep copy of the receiver within the same document. The result is a "PDF semantic" deep copy, implementation artifacts as "attributes" and listeners are NOT copied.

The algorithm copies this along with all outgoing references (recursively).

Object identity is preserved.

Be careful when copying objects, as there are semantics that may NOT be recognized by this method.

Specified by:

copyDeep in class COSObject

Returns:

the object copied recursively

copyDeep

public COSObject copyDeep(Map copied)

Description copied from class: COSObject

Make a deep copy of the receiver within the same document. The result is a "PDF semantic" deep copy, implementation artifacts as "attributes" and listeners are NOT copied.

The copied map is used to identify objects copied in earlier runs of this method to avoid duplicating resources used in different copy targets (for example the pages of a document). copied is modified while executing copyDeep and contains a mapping from indirect objects in the original document to copied objects.

The algorithm copies this along with all outgoing references (recursively).

Object identity is preserved.

Be careful when copying objects, as there are semantics that may NOT be recognized by this method.

Specified by:

copyDeep in class COSObject

Returns:

the object copied recursively

See Also:

COSObject.copyDeep()

disassociate

public ICOSContainer disassociate(ICOSContainer oldContainer,
                                  COSObject object)

Description copied from interface: ICOSContainer

It is the responsibility of the current container to remove the association from the old one. The table shows the available transitions.

              | composite  | indirect   |
              |
    constant  | n.a.       | n.a.       |
    null      | n.a.       | n.a.       |
    composite | ok         | n.a.       |
    indirect  | ok         | n.a.       |
 

Specified by:

disassociate in interface ICOSContainer

Returns:

The resulting ICOSContainer for object

getAttribute

public Object getAttribute(Object key)

Specified by:

getAttribute in interface de.intarsys.tools.attribute.IAttributeSupport

harden

public void harden(COSObject object)

Propagate up the containment hierarchy

Specified by:

harden in interface ICOSContainer

Parameters:

object - The object that should be kept in memory.

See Also:

ICOSContainer.harden(de.intarsys.pdf.cos.COSObject)

isObjectListenerAvailable

public boolean isObjectListenerAvailable()

Description copied from class: COSObject

true if an ICOSObjectListener is registered. This is for test purposes.

Specified by:

isObjectListenerAvailable in class COSObject

isPrimitive

public boolean isPrimitive()

Description copied from class: COSObject

Answer true if this object is of a primitive type

Specified by:

isPrimitive in class COSObject

Returns:

Answer true if this object is of a primitive type

mayBeSwapped

public boolean mayBeSwapped()

Description copied from class: COSObject

true if this object may be swapped from memory by the garbage collector.

Overrides:

mayBeSwapped in class COSObject

Returns:

true if this object may be swapped from memory by the garbage collector.

referenceCount

public int referenceCount()

Description copied from interface: ICOSContainer

The number of references to the contained object. This method returns -1 when the value can not be determined (as for indirect objects parsed from a file).

Specified by:

referenceCount in interface ICOSContainer

Returns:

The number of references to the contained object.

referenceIndirect

public COSIndirectObject referenceIndirect(COSObject object)

Change the reference to the object contained in this to an indirect one via reference.

This method must be redefined by all containers to reflect the new reference type in their child references.

This event is delegated to the document to create the correct state for a new indirect object. If a document is not yet present, the state is changed when the COSObject (s) are added to the document finally. This can happen when constructing a COSObject graph "offline" and later add it to the document.

From the COS invariants you can be sure that the object referenced by ref is contained in this at most once

Specified by:

referenceIndirect in interface ICOSContainer

Parameters:

object -

register

public void register(COSDocumentElement object)

Description copied from interface: ICOSContainer

It is the responsibility of the active container to register object in its data structures.

Specified by:

register in interface ICOSContainer

Parameters:

object - The new object to be registered in the hierarchy.

removeAttribute

public Object removeAttribute(Object key)

Specified by:

removeAttribute in interface de.intarsys.tools.attribute.IAttributeSupport

removeObjectListener

public void removeObjectListener(ICOSObjectListener listener)

Description copied from class: COSObject

Remove a listener for object changes.

Specified by:

removeObjectListener in class COSObject

Parameters:

listener - The listener to be removed.

restoreStateContainer

public ICOSContainer restoreStateContainer(ICOSContainer pContainer)

Description copied from interface: ICOSContainer

Restore the save state for the container.

Specified by:

restoreStateContainer in interface ICOSContainer

Returns:

The "before" state of the receiver.

saveStateContainer

public ICOSContainer saveStateContainer()

Description copied from interface: ICOSContainer

Create a save state for the container when saving the COSObject state.

Specified by:

saveStateContainer in interface ICOSContainer

Returns:

The save state for the container.

setAttribute

public Object setAttribute(Object key,
                           Object value)

Specified by:

setAttribute in interface de.intarsys.tools.attribute.IAttributeSupport

soften

public void soften(COSObject object)

Propagate up the containment hierarchy

Specified by:

soften in interface ICOSContainer

Parameters:

object - The object that should be kept in memory.

See Also:

ICOSContainer.soften(de.intarsys.pdf.cos.COSObject)

willChange

public void willChange(COSObject change)

Description copied from interface: ICOSContainer

Propagate a change from a COSObject down in the hierarchy.

Specified by:

willChange in interface ICOSContainer