Module openj9.dtfj

Package com.ibm.j9ddr

Class StructureHeader

java.lang.Object

com.ibm.j9ddr.StructureHeader

public class StructureHeader
extends Object

Represents the header for the blob

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	StructureHeader.BlobID	Identifies the type of blob by its name

Constructor Summary

Constructors

Constructor	Description
StructureHeader(byte configVersion)	Allow the use of partial header reading by creating a StructureHeader which is just identified by it's version.
StructureHeader(StructureHeader.BlobID id, int blobVersion, String packageID)	Configure a structure header which is just identified by a blob type and version.
StructureHeader(InputStream in)	Use this constructor if the header is coming from a superset file.
StructureHeader(ImageInputStream ddrStream)

Method Summary

Modifier and Type	Method	Description
byte	getBitfieldFormat()
StructureHeader.BlobID	getBlobID()
int	getBlobVersion()
int[]	getBlobVersionArray()
byte	getConfigVersion()
int	getCoreVersion()
long	getHeaderSize()
String	getPackageID()
byte	getSizeofBool()
byte	getSizeofUDATA()
int	getStringTableDataSize()
int	getStructDataSize()
int	getStructureCount()
void	readBlobVersion(ImageInputStream ddrStream)

Methods declared in class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

StructureHeader

public StructureHeader(ImageInputStream ddrStream)
                throws IOException

Throws:

IOException

StructureHeader

public StructureHeader(byte configVersion)

Allow the use of partial header reading by creating a StructureHeader which is just identified by it's version. Fragments of the header can then be read in. The primary use for this function is when loading just a blob identifier from the core file which is then used to match an entry in the blob library.

Parameters:

configVersion -

StructureHeader

public StructureHeader(StructureHeader.BlobID id,
                       int blobVersion,
                       String packageID)

Configure a structure header which is just identified by a blob type and version. This will be used when a blob is determined by heuristics rather than directly being read from the core. This information is then typically used to retrieve the blob from the BlobFactory.

Parameters:

id -

blobVersion -

packageID -

StructureHeader

public StructureHeader(InputStream in)

Use this constructor if the header is coming from a superset file. Warning : as this file does not contain any header information all the defaults will be used in this instance.

Parameters:

in -

Method Detail

readBlobVersion

public void readBlobVersion(ImageInputStream ddrStream)
                     throws IOException

Throws:

IOException

getCoreVersion

public int getCoreVersion()

getSizeofBool

public byte getSizeofBool()

getSizeofUDATA

public byte getSizeofUDATA()

getBitfieldFormat

public byte getBitfieldFormat()

getStructDataSize

public int getStructDataSize()

getStringTableDataSize

public int getStringTableDataSize()

getStructureCount

public int getStructureCount()

getConfigVersion

public byte getConfigVersion()

getBlobID

public StructureHeader.BlobID getBlobID()

getBlobVersion

public int getBlobVersion()

getBlobVersionArray

public int[] getBlobVersionArray()

getPackageID

public String getPackageID()

getHeaderSize

public long getHeaderSize()