Java Doc for KeyHasher.java in  » Database-DBMS » db-derby-10.2 » org » apache » derby » iapi » store » access » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Database DBMS » db derby 10.2 » org.apache.derby.iapi.store.access   Source Cross Reference   Class Diagram   Java Document (Java Doc)   java.lang.Object    org.apache.derby.iapi.store.access.KeyHasher KeyHasher public class KeyHasher (Code) Provides the ability to hash on multiple objects. Constructor Summary public   KeyHasher(int size)      Method Summary public static  Object buildHashKey(Object[] objects, int[] indexes)      Static method to return the object to hash on. public  boolean equals(Object obj)      public  Object getObject(int index)      Get the object stored at the specified index. Parameters:   index - The specified index. public  int hashCode()      public  void setObject(int index, Object object)      Set array element at the specified index to the specified object. Constructor Detail KeyHasher public KeyHasher(int size)(Code) Method Detail buildHashKey public static Object buildHashKey(Object[] objects, int[] indexes)(Code) Static method to return the object to hash on. (Object stored in specifed array, if only a single object, otherwise a KeyHasher wrapping the objects to hash on. (NOTE: We optimize for in-memory hash tables, hence we only create a wrapper when needed.) Parameters:   objects - The array of objects to consider Parameters:   indexes - The indexes of the objects in the hash key. The object to hash on. equals public boolean equals(Object obj)(Code) getObject public Object getObject(int index)(Code) Get the object stored at the specified index. Parameters:   index - The specified index. The object stored in the array element. hashCode public int hashCode()(Code) setObject public void setObject(int index, Object object)(Code) Set array element at the specified index to the specified object. Parameters:   index - The specified index Parameters:   object - The specified 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)