Java Doc for VersionStrategy.java in  » Database-ORM » JPOX » org » jpox » metadata » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database ORM » JPOX » org.jpox.metadata   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    org.jpox.metadata.VersionStrategy VersionStrategy public class VersionStrategy implements Serializable(Code) Three common strategies for versioning instances are supported by standard metadata. These include state-comparison, timestamp, and version-number. state-image involves comparing the values in specific columns to determine if the database row was changed. date-time involves comparing the value in a date-time column in the table. The first time in a transaction the row is updated, the timestamp value is updated to the current time. version-number involves comparing the value in a numeric column in the table. The first time in a transaction the row is updated, the version-number column value is incremented. version:    $Revision: 1.6 $ Field Summary final public static  VersionStrategy DATE_TIME      final public static  VersionStrategy NONE      final public static  VersionStrategy STATE_IMAGE      final public static  VersionStrategy VERSION_NUMBER      Method Summary public  boolean equals(Object o)      Indicates whether some other object is "equal to" this one. Parameters:   o - the reference object with which to compare. protected  int getType()      public static  VersionStrategy getVersionStrategy(String value)      Return VersionStrategy from String. Parameters:   value - strategy attribute value Instance of VersionStrategy. public  String toString()      Returns a string representation of the object. Field Detail DATE_TIME final public static VersionStrategy DATE_TIME(Code) strategy="date-time" NONE final public static VersionStrategy NONE(Code) strategy="none" STATE_IMAGE final public static VersionStrategy STATE_IMAGE(Code) strategy="state-image" VERSION_NUMBER final public static VersionStrategy VERSION_NUMBER(Code) strategy="version-number" Method Detail equals public boolean equals(Object o)(Code) Indicates whether some other object is "equal to" this one. Parameters:   o - the reference object with which to compare. true if this object is the same as the obj argument; false otherwise. getType protected int getType()(Code) getVersionStrategy public static VersionStrategy getVersionStrategy(String value)(Code) Return VersionStrategy from String. Parameters:   value - strategy attribute value Instance of VersionStrategy. If value invalid, return null. toString public String toString()(Code) Returns a string representation of the object. a string representation of the object. Methods inherited from java.lang.Object native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc) public boolean equals(Object obj)(Code)(Java Doc) protected void finalize() throws Throwable(Code)(Java Doc) final native public Class getClass()(Code)(Java Doc) native public int hashCode()(Code)(Java Doc) final native public void notify()(Code)(Java Doc) final native public void notifyAll()(Code)(Java Doc) public String toString()(Code)(Java Doc) final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc) final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc) final public void wait() throws InterruptedException(Code)(Java Doc)