Package org.eclipse.mat.parser.model

Class ClassLoaderImpl

java.lang.Object

org.eclipse.mat.parser.model.AbstractObjectImpl

org.eclipse.mat.parser.model.InstanceImpl

org.eclipse.mat.parser.model.ClassLoaderImpl

All Implemented Interfaces:

Serializable, IClassLoader, IInstance, IObject

public class ClassLoaderImpl
extends InstanceImpl
implements IClassLoader

Implementation of a Java object representing a java.lang.ClassLoader object. As well as standard object information it contains information about the class loader and summary details about classes loaded by this class loader.

See Also:

• Serialized Form

No Extend:

Nested Class Summary

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

IObject.Type

Field Summary

Fields

Modifier and Type	Field	Description
static final String	NO_LABEL	If the class loader has no name

Constructor Summary

Constructors

Constructor	Description
ClassLoaderImpl(int objectId, long address, ClassImpl clazz, List<Field> fields)	Constructs a class loader object.

Method Summary

Modifier and Type	Method	Description
static final List<IClass>	doGetDefinedClasses(ISnapshot dump, int classLoaderId)	Gets the classes defined by a given loader
static final long	doGetRetainedHeapSizeOfObjects(ISnapshot dump, int classLoaderId, boolean calculateIfNotAvailable, boolean calculateMinRetainedSize, IProgressListener listener)	Calculates the retained size of all classes and instances of the class loaded by a class loader.
String	getClassSpecificName()	Get class specific name of this object which depends on the availability of the appropriate name resolver, e.g.
List<IClass>	getDefinedClasses()	Returns the classes defined by this class loader instance.
long	getRetainedHeapSizeOfObjects(boolean calculateIfNotAvailable, boolean calculateMinRetainedSize, IProgressListener listener)	Returns the retained size of all objects and classes loaded by this class loader.

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

getField, getFields, getObjectAddress, getObjectId, getOutboundReferences, getReferences, getUsedHeapSize

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

equals, getClassAddress, getClassId, 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.IInstance

getField, getFields

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

getClazz, getDisplayName, getGCRootInfo, getObjectAddress, getObjectId, getOutboundReferences, getRetainedHeapSize, getSnapshot, getTechnicalName, getUsedHeapSize, resolveValue

Field Details

NO_LABEL

public static final String NO_LABEL

If the class loader has no name

See Also:

• Constant Field Values

Constructor Details

ClassLoaderImpl

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

Constructs a class loader object.

Parameters:

objectId - the object id

address - the actual address of the object

clazz - its type

fields - the fields of the object

Method Details

getClassSpecificName

public String getClassSpecificName()

Description copied from interface: IObject

Get class specific name of this object which depends on the availability of the appropriate name resolver, e.g. for a String the value of the char[].

Specified by:

getClassSpecificName in interface IObject

Overrides:

getClassSpecificName in class AbstractObjectImpl

Returns:

class specific name of the given snapshot object or null if it can't be resolved

getDefinedClasses

public List<IClass> getDefinedClasses()
                               throws SnapshotException

Description copied from interface: IClassLoader

Returns the classes defined by this class loader instance.

Specified by:

getDefinedClasses in interface IClassLoader

Returns:

a list of classes defined by this class loader

Throws:

SnapshotException - if there is a problem retrieving the information

getRetainedHeapSizeOfObjects

public long getRetainedHeapSizeOfObjects(boolean calculateIfNotAvailable,
 boolean calculateMinRetainedSize,
 IProgressListener listener)
                                  throws SnapshotException

Description copied from interface: IClassLoader

Returns the retained size of all objects and classes loaded by this class loader.

Specified by:

getRetainedHeapSizeOfObjects in interface IClassLoader

Parameters:

calculateIfNotAvailable - if false only return a cached version of the size

calculateMinRetainedSize - if true then when calculating use an approximation

listener - to indicate progress and errors

Returns:

the retained size, negative if approximate

Throws:

SnapshotException

doGetDefinedClasses

public static final List<IClass> doGetDefinedClasses(ISnapshot dump,
 int classLoaderId)
                                              throws SnapshotException

Gets the classes defined by a given loader

Parameters:

dump - the snapshot

classLoaderId - the class loader to look for

Returns:

a list of classes

Throws:

SnapshotException - problem retrieving the information

doGetRetainedHeapSizeOfObjects

public static final long doGetRetainedHeapSizeOfObjects(ISnapshot dump,
 int classLoaderId,
 boolean calculateIfNotAvailable,
 boolean calculateMinRetainedSize,
 IProgressListener listener)
                                                 throws SnapshotException

Calculates the retained size of all classes and instances of the class loaded by a class loader.

Parameters:

dump - the snapshot

classLoaderId - the class loader if

calculateIfNotAvailable - true if to skip calculations if not already done

calculateMinRetainedSize - true if to make an approximate calculation

listener - to indicate progress, errors and to cancel

Returns:

the size, negative if approximate

Throws:

SnapshotException - problem retrieving the information