Package org.eclipse.mat.parser.model

Class InstanceImpl

java.lang.Object

org.eclipse.mat.parser.model.AbstractObjectImpl

org.eclipse.mat.parser.model.InstanceImpl

All Implemented Interfaces:

Serializable, IInstance, IObject

Direct Known Subclasses:

ClassLoaderImpl

public class InstanceImpl
extends AbstractObjectImpl
implements IInstance

Implementation of a plain Java object. This includes field information.

See Also:

• Serialized Form

No Extend:

Nested Class Summary

Nested classes/interfaces inherited from interface org.eclipse.mat.snapshot.model.IObject

IObject.Type

Constructor Summary

Constructors

Constructor	Description
InstanceImpl(int objectId, long address, ClassImpl clazz, List<Field> fields)	Construct a representation of plain java object in the snapshot.

Method Summary

Modifier and Type	Method	Description
Field	getField(String name)	Returns the field identified by the name.
List<Field>	getFields()	Returns all fields of the object.
long	getObjectAddress()	Get address for the snapshot object.
int	getObjectId()	Get id for the snapshot object.
List<NamedReference>	getOutboundReferences()	Get list of snapshot objects referenced from this snapshot object with the name of the field over which it was referenced.
ArrayLong	getReferences()	Gets the outbound references from this object, as addresses.
long	getUsedHeapSize()	Get used heap size of just this object.

Methods inherited from class org.eclipse.mat.parser.model.AbstractObjectImpl

equals, getClassAddress, getClassId, getClassSpecificName, getClazz, getComparatorForClassSpecificName, getComparatorForTechnicalName, getComparatorForUsedHeapSize, getDisplayName, getGCRootInfo, getRetainedHeapSize, getSnapshot, getTechnicalName, hashCode, resolveValue, setClassInstance, setObjectAddress, setObjectId, setSnapshot, toString

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.eclipse.mat.snapshot.model.IObject

getClassSpecificName, getClazz, getDisplayName, getGCRootInfo, getRetainedHeapSize, getSnapshot, getTechnicalName, resolveValue

Constructor Details

InstanceImpl

public InstanceImpl(int objectId,
 long address,
 ClassImpl clazz,
 List<Field> fields)

Construct a representation of plain java object in the snapshot.

Parameters:

objectId - the object id

address - the actual address

clazz - the type of the object

fields - the instance fields of the object (the static fields are held in the class)

Method Details

getObjectAddress

public long getObjectAddress()

Description copied from interface: IObject

Get address for the snapshot object. This is the address at which the object was stored in memory. Use the address only for visualization purposes and try to use the id wherever possible as the snapshot API is optimized to handle ids and not addresses. Addresses are bigger ( long), have no consecutive order (with gaps), and are not used for hashing.

Specified by:

getObjectAddress in interface IObject

Overrides:

getObjectAddress in class AbstractObjectImpl

Returns:

address for the snapshot object

getObjectId

public int getObjectId()

Description copied from interface: IObject

Get id for the snapshot object. The id is not the address, but an internally assigned number fitting into an int (this helps reducing the memory footprint of the snapshot considerably - addresses are only used for visualization purposes).

Specified by:

getObjectId in interface IObject

Overrides:

getObjectId in class AbstractObjectImpl

Returns:

id for the snapshot object

getFields

public List<Field> getFields()

Description copied from interface: IInstance

Returns all fields of the object.

Fields are ordered in such a way, that first fields defined in the current class and then fields of the super class and its super classes are returned. This order is important to know, if a class declares a field by the same name as the class it inherits from.

Specified by:

getFields in interface IInstance

Returns:

a list of the fields

getField

public Field getField(String name)

Description copied from interface: IInstance

Returns the field identified by the name.

If declares a member variable by the same name as the parent class does, then the result of this method is undefined.

Specified by:

getField in interface IInstance

Parameters:

name - the name of the field

Returns:

the field

getUsedHeapSize

public long getUsedHeapSize()

Description copied from interface: IObject

Get used heap size of just this object.

Specified by:

getUsedHeapSize in interface IObject

Specified by:

getUsedHeapSize in class AbstractObjectImpl

Returns:

used heap size of this object

getReferences

public ArrayLong getReferences()

Description copied from class: AbstractObjectImpl

Gets the outbound references from this object, as addresses.

Specified by:

getReferences in class AbstractObjectImpl

Returns:

a list of outbound references

getOutboundReferences

public List<NamedReference> getOutboundReferences()

Description copied from interface: IObject

Get list of snapshot objects referenced from this snapshot object with the name of the field over which it was referenced.

Specified by:

getOutboundReferences in interface IObject

Returns:

list of snapshot objects referenced from this snapshot object with the name of the field over which it was referenced