Package org.eclipse.mat.hprof
Class HprofHeapObjectReader
java.lang.Object
org.eclipse.mat.hprof.HprofHeapObjectReader
- All Implemented Interfaces:
IObjectReader
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Field Summary
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Constructor Summary
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Method Summary
Modifier and TypeMethodDescriptionvoidclose()tidy up when snapshot no longer required<A> AReturns extra data to be provided byISnapshot.getSnapshotAddons(Class addon).voidOpen the dump file associated with the snapshotGet detailed information about an objectlong[]readObjectArrayContent(ObjectArrayImpl array, int offset, int length) Get detailed information about a object arrayreadPrimitiveArrayContent(PrimitiveArrayImpl array, int offset, int length) Get detailed information about a primitive array
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Field Details
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VERSION_PROPERTY
- See Also:
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HPROF_LENGTH_PROPERTY
- See Also:
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HPROF_HEAP_START
- See Also:
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Constructor Details
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HprofHeapObjectReader
public HprofHeapObjectReader()
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Method Details
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open
Description copied from interface:IObjectReaderOpen the dump file associated with the snapshot- Specified by:
openin interfaceIObjectReader- Parameters:
snapshot- the snapshot- Throws:
IOException- an IO problem, or corrupt indexes or unexpected data in the dump
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readObjectArrayContent
public long[] readObjectArrayContent(ObjectArrayImpl array, int offset, int length) throws IOException, SnapshotException Description copied from interface:IObjectReaderGet detailed information about a object array- Specified by:
readObjectArrayContentin interfaceIObjectReader- Parameters:
array- the arrayoffset- where in the array to startlength- how much to read- Returns:
- an array of object addresses, with 0 for nulls
- Throws:
IOException- an IO problem or unexpected data in the dumpSnapshotException- some other problem such as where the object is incompatible with the snapshot
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readPrimitiveArrayContent
public Object readPrimitiveArrayContent(PrimitiveArrayImpl array, int offset, int length) throws IOException, SnapshotException Description copied from interface:IObjectReaderGet detailed information about a primitive array- Specified by:
readPrimitiveArrayContentin interfaceIObjectReader- Parameters:
array- the arrayoffset- where in the array to startlength- how much to read- Returns:
- a byte[], short[], int[], long[], boolean[], char[], float[], double[]
- Throws:
IOException- an IO problem or unexpected data in the dumpSnapshotException- some other problem such as where the object is incompatible with the snapshot
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read
Description copied from interface:IObjectReaderGet detailed information about an object- Specified by:
readin interfaceIObjectReader- Parameters:
objectId- the object idsnapshot- the snapshot- Returns:
- an IObject such as
InstanceImpl,ObjectArrayImpl,PrimitiveArrayImpl,ClassLoaderImpl - Throws:
SnapshotException- some other problem such as where the object is incompatible with the snapshotIOException- an IO problem or unexpected data in the dump
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getAddon
Returns extra data to be provided byISnapshot.getSnapshotAddons(Class addon). Also can be returned viaArgument.- Specified by:
getAddonin interfaceIObjectReader- Type Parameters:
A- used to set the return type- Parameters:
addon- the type of the extra data required from the dump. HprofHeapObjectReader can be extended using anIRuntimeEnhancerextension to return extra data.- Returns:
- the extra data
- Throws:
SnapshotException- an IO problem or unexpected data in the dump- See Also:
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close
Description copied from interface:IObjectReadertidy up when snapshot no longer required- Specified by:
closein interfaceIObjectReader- Throws:
IOException- should not normally occur
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