com.bigdata.btree.keys

Class ICUVersionRecord

java.lang.Object

com.bigdata.btree.keys.ICUVersionRecord

All Implemented Interfaces:

Externalizable, Serializable

public class ICUVersionRecord
extends Object
implements Externalizable

Persistent record in which we store the version metadata for the ICU dependency in use when the journal was created. bigdata uses Unicode sort keys for various indices, including Name2Addr. A change in the ICU version can result in sort keys which are NOT compatible. Binary compatibility for Unicode sort keys is an absolute requirement for bigdata. The purpose of this persistence capable data record is to note the version of ICU against which bigdata was linked with the associated binary store file was created.

Note: This can result in data which apparently becomes "lost", such as this Version:

$Id$

Author:

Bryan Thompson

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ICUVersionRecord() De-serialization contructor only.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(Object o)
com.ibm.icu.util.VersionInfo	getICUVersion() The ICU software version number.
com.ibm.icu.util.VersionInfo	getUColBuilderVersion() If this version number changes, then the same tailoring might result in assigning different collation elements to code points (which could break binary compatibility on sort keys).
com.ibm.icu.util.VersionInfo	getUColRuntimeVersion() If this version number changes, then the sort keys for the same Unicode string could be different.
com.ibm.icu.util.VersionInfo	getUColTailoringsVersion() The version of the collation tailorings.
int	hashCode()
static void	main(String[] args) Writes out the ICUVersionRecord for the current classpath.
static ICUVersionRecord	newInstance() Factory returns a record reporting on the ICU dependency as currently linked with the code base.
void	readExternal(ObjectInput in)
String	toString() A human readable representation of the data record.
void	writeExternal(ObjectOutput out)

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ICUVersionRecord

public ICUVersionRecord()

De-serialization contructor only.

Method Detail

getICUVersion

public com.ibm.icu.util.VersionInfo getICUVersion()

The ICU software version number.

See Also:

VersionInfo.ICU_VERSION

getUColRuntimeVersion

public com.ibm.icu.util.VersionInfo getUColRuntimeVersion()

If this version number changes, then the sort keys for the same Unicode string could be different.

See Also:

VersionInfo.UCOL_RUNTIME_VERSION

getUColBuilderVersion

public com.ibm.icu.util.VersionInfo getUColBuilderVersion()

If this version number changes, then the same tailoring might result in assigning different collation elements to code points (which could break binary compatibility on sort keys).

See Also:

VersionInfo.UCOL_BUILDER_VERSION

getUColTailoringsVersion

public com.ibm.icu.util.VersionInfo getUColTailoringsVersion()

The version of the collation tailorings.

See Also:

VersionInfo.UCOL_TAILORINGS_VERSION

newInstance

public static ICUVersionRecord newInstance()

Factory returns a record reporting on the ICU dependency as currently linked with the code base.

readExternal

public void readExternal(ObjectInput in)
                  throws IOException,
                         ClassNotFoundException

Specified by:

readExternal in interface Externalizable

Throws:

IOException

ClassNotFoundException

writeExternal

public void writeExternal(ObjectOutput out)
                   throws IOException

Specified by:

writeExternal in interface Externalizable

Throws:

IOException

toString

public String toString()

A human readable representation of the data record.

Overrides:

toString in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

main

public static void main(String[] args)

Writes out the ICUVersionRecord for the current classpath.

Parameters:

args - Ignored.