BrowseDAOUtils.java

/*
 * BrowseDAOUtils.java
 *
 * Version: $Revision: 3736 $
 *
 * Date: $Date: 2009-04-24 04:16:22 +0000 (Fri, 24 Apr 2009) $
 *
 * Copyright (c) 2002-2009, The DSpace Foundation.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * - Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 *
 * - Neither the name of the DSpace Foundation nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */
package org.dspace.browse;

/**
 * Utility class for retrieving the size of the columns to be used in the browse tables,
 * and applying truncation to the strings that will be inserted into the tables.
 * 
 * Can be configured in dspace.cfg, with the following entries:
 * 
 * webui.browse.value_columns.max
 *   - the maximum number of characters in 'value' columns
 *     (0 is unlimited)
 *   
 * webui.browse.sort_columns.max
 *   - the maximum number of characters in 'sort' columns
 *     (0 is unlimited)
 *   
 * webui.browse.value_columns.omission_mark
 *   - a string to append to truncated values that will be entered into
 *     the value columns (ie. '...')
 *     
 * By default, the column sizes are '0' (unlimited), and no truncation is applied,
 * EXCEPT for Oracle, where we have to truncate the columns for it to work! (in which
 * case, both value and sort columns are by default limited to 2000 characters).
 *  
 * @author Graham Triggs
 * @author Richard Jones
 */
public interface BrowseDAOUtils
{
	/**
     * Get the size to use for the 'value' columns in characters
     * 
     * @return
     */
    public int getValueColumnMaxChars();

    /**
     * Get the size to use for the sort columns in characters
     * 
     * @return
     */
    public int getSortColumnMaxChars();

    /**
     * Truncate strings that are to be used for the 'value' columns
     * 
     * @param value
     * @return
     */
    public String truncateValue(String value);
    
    /**
     * Truncate strings that are to be used for sorting
     *  
     * @param value
     * @return
     */
    public String truncateSortValue(String value);
    
    /**
     * Truncate strings that are to be used for the 'value' columns.
     * Characters is the maximum number of characters to allow.
     * Actual truncation applied will be the SMALLER of the passed
     * value, or that read from the configuration.
     * 
     * @param value
     * @param chars
     * @return
     * @deprecated
     */
    public String truncateValue(String value, int chars);
    
    /**
     * Truncate strings that are to be used for the sorting
     * Characters is the maximum number of characters to allow.
     * Actual truncation applied will be the SMALLER of the passed
     * value, or that read from the configuration.
     * 
     * @param value
     * @param chars
     * @return
     * @deprecated
     */
    public String truncateSortValue(String value, int chars);
}