001// Copyright 2005 The Apache Software Foundation
002//
003// Licensed under the Apache License, Version 2.0 (the "License");
004// you may not use this file except in compliance with the License.
005// You may obtain a copy of the License at
006//
007//     http://www.apache.org/licenses/LICENSE-2.0
008//
009// Unless required by applicable law or agreed to in writing, software
010// distributed under the License is distributed on an "AS IS" BASIS,
011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012// See the License for the specific language governing permissions and
013// limitations under the License.
014
015/*
016 * Created on Jul 6, 2005
017 */
018package org.apache.tapestry.contrib.table.model.simple;
019
020import java.util.StringTokenizer;
021
022import org.apache.hivemind.ApplicationRuntimeException;
023import org.apache.tapestry.contrib.table.components.TableMessages;
024import org.apache.tapestry.services.DataSqueezer;
025import org.apache.tapestry.util.io.SqueezeAdaptor;
026
027public class SimpleTableStateAdaptor implements SqueezeAdaptor
028{
029
030    private static final String PREFIX = "t";
031
032    /**
033     * @see SqueezeAdaptor#getPrefix()
034     */
035    public String getPrefix()
036    {
037        return PREFIX;
038    }
039
040    /**
041     * @see SqueezeAdaptor#getDataClass()
042     */
043    public Class getDataClass()
044    {
045        return SimpleTableState.class;
046    }
047
048    public String squeeze(DataSqueezer squeezer, Object data)
049    {
050        SimpleTableState objState = (SimpleTableState) data;
051
052        StringBuffer buf = new StringBuffer();
053        buf.append(objState.getPagingState().getPageSize());
054        buf.append(":");
055        buf.append(objState.getPagingState().getCurrentPage());
056        buf.append(":");
057        String strSortColumn = objState.getSortingState().getSortColumn();
058        if (strSortColumn == null)
059            strSortColumn = "";
060        buf.append(strSortColumn);
061        buf.append(":");
062        buf.append(objState.getSortingState().getSortOrder() ? 'T' : 'F');
063
064        return buf.toString();
065    }
066
067    public Object unsqueeze(DataSqueezer squeezer, String string)
068    {
069        StringTokenizer strTok = new StringTokenizer(string, ":");
070        if (strTok.countTokens() != 4)
071            throw new ApplicationRuntimeException(TableMessages.invalidTableStateFormat(string));
072        int nPageSize = Integer.parseInt(strTok.nextToken());
073        int nCurrentPage = Integer.parseInt(strTok.nextToken());
074        String strSortColumn = strTok.nextToken();
075        if (strSortColumn.equals(""))
076            strSortColumn = null;
077        boolean bSortOrder = strTok.nextToken().equals("T");
078
079        return new SimpleTableState(nPageSize, nCurrentPage, strSortColumn, bSortOrder);
080    }
081
082}