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Java Source | 1998-03-20 | 3.3 KB | 102 lines |
- /*
- * @(#)WordBreakTable.java 1.5 98/03/18
- *
- * (C) Copyright Taligent, Inc. 1996 - All Rights Reserved
- * (C) Copyright IBM Corp. 1996 - All Rights Reserved
- *
- * Portions copyright (c) 1996-1998 Sun Microsystems, Inc. All Rights Reserved.
- *
- * The original version of this source code and documentation is copyrighted
- * and owned by Taligent, Inc., a wholly-owned subsidiary of IBM. These
- * materials are provided under terms of a License Agreement between Taligent
- * and Sun. This technology is protected by multiple US and International
- * patents. This notice and attribution to Taligent may not be removed.
- * Taligent is a registered trademark of Taligent, Inc.
- *
- * Permission to use, copy, modify, and distribute this software
- * and its documentation for NON-COMMERCIAL purposes and without
- * fee is hereby granted provided that this copyright notice
- * appears in all copies. Please refer to the file "copyright.html"
- * for further important copyright and licensing information.
- *
- * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
- * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
- * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
- *
- */
-
- package java.text;
-
- /**
- * This class implements a state transition table.
- * After each transition, using the get method, the
- * new state is returned along with information about
- * the state change (ex. was it a "marked" transition").
- * This class is internal only.
- */
- final class WordBreakTable
- {
- /**
- * Construct a table using existing data. See SentenceBreakBoundary and
- * the other SimpleTextBoundary subclasses for examples.
- * @param cols number of columns in the table
- * @param data an encoded byte array containing state and transition data
- */
- public WordBreakTable(int cols, byte data[])
- {
- this.data = data;
- this.cols = cols;
- }
-
- /**
- * Get the resulting state moving from oldState accepting input
- * @param oldState current state
- * @param input input
- * @return int resulting state and transition data
- */
- public int get(int oldState, int input)
- {
- return data[(oldState & INDEX_MASK) * cols + input];
- }
-
- /**
- * Checks to see if the transition into the specified state was "marked"
- * @param state the state as returned by get, initialState, or endState
- * @return true if transition into state was marked.
- */
- public boolean isMarkState(int state)
- {
- return (state & MARK_MASK) != 0;
- }
-
- /**
- * Check is a state is the end state
- * @param state the state to check
- * @return true if state is an end state
- */
- public boolean isEndState(int state)
- {
- return (state & INDEX_MASK) == END_STATE;
- }
-
- /**
- * Get the start state
- * @return the initial state
- */
- public int initialState()
- {
- return INITIAL_STATE;
- }
-
- static final byte MARK_MASK = (byte)0x80;
- static final byte INDEX_MASK = (byte)0x7F;
- private static final int INITIAL_STATE = 1;
- private static final int END_STATE = 0;
- private byte data[];
- private int cols;
- }
-
-