com.sun.squawk
Class ObjectMemoryFile

java.lang.Object
  com.sun.squawk.ObjectMemoryFile

public final class ObjectMemoryFile
extends Object

An ObjectMemoryFile encapsulates all the data in a serialized object graph. The format of a serialized object graphic is described by the following pseudo C struct:

    ObjectMemory {
        u4 magic               // 0xDEADBEEF
        u2 minor_version;
        u2 major_version;
        u4 attributes;         // mask of the ATTRIBUTE_* constants in this class
        u4 parent_hash;
        utf8 parent_uri;
        u4 root;               // offset (in bytes) in 'memory' of the root of the graph
        u4 size;               // size (in bytes) of memory
        u1 oopmap[((size / HDR.BYTES_PER_WORD) + 7) / 8];
        u1 padding[n];         // 0 <= n < HDR.BYTES_PER_WORD to align 'memory' on a word boundary
        u1 memory[size];
        u1 typemap[size];      // only present if ATTRIBUTE_TYPEMAP is set
    }
 

Field Summary

static int	ATTRIBUTE_32BIT Denotes a object memory file that is only compatible with a 32 bit system.
static int	ATTRIBUTE_BIGENDIAN Denotes a object memory file that is in big endian format.
static int	ATTRIBUTE_TYPEMAP Denotes a object memory file that has a type map describing the type of the value at every address in the 'memory' component.
int	attributes
int	major
int	minor
ObjectMemory	objectMemory
int	parentHash
String	parentURI

Constructor Summary

ObjectMemoryFile(int minor, int major, int attributes, int parentHash, String parentURI, ObjectMemory objectMemory)

Method Summary

boolean

isBigEndian() Determines if attributes value in this object memory file denoted a big endian format memory.

Methods inherited from class java.lang.Object

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

Field Detail

ATTRIBUTE_TYPEMAP

public static final int ATTRIBUTE_TYPEMAP

Denotes a object memory file that has a type map describing the type of the value at every address in the 'memory' component. The entries in the map are described in AddressType.

See Also:

Constant Field Values

ATTRIBUTE_32BIT

public static final int ATTRIBUTE_32BIT

Denotes a object memory file that is only compatible with a 32 bit system. Otherwise the object memory file is only compatible with a 64 bit system.

See Also:

Constant Field Values

ATTRIBUTE_BIGENDIAN

public static final int ATTRIBUTE_BIGENDIAN

Denotes a object memory file that is in big endian format. Otherwise the object memory file is in little endian format.

See Also:

Constant Field Values

minor

public final int minor

major

public final int major

attributes

public final int attributes

parentHash

public final int parentHash

parentURI

public final String parentURI

objectMemory

public final ObjectMemory objectMemory

Constructor Detail

ObjectMemoryFile

public ObjectMemoryFile(int minor,
                        int major,
                        int attributes,
                        int parentHash,
                        String parentURI,
                        ObjectMemory objectMemory)

Method Detail

isBigEndian

public boolean isBigEndian()

Determines if attributes value in this object memory file denoted a big endian format memory.

Returns:

true if (this.attributes & ATTRIBUTE_BIGENDIAN) != 0