tapestry/tapestry-contrib/src/java/org/apache/tapestry/contrib/table/model/simple/SimpleTableStateAdaptor.java

// Copyright 2005 The Apache Software Foundation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

/*
 * Created on Jul 6, 2005
 */
package org.apache.tapestry.contrib.table.model.simple;

import java.util.StringTokenizer;

import org.apache.hivemind.ApplicationRuntimeException;
import org.apache.tapestry.contrib.table.components.TableMessages;
import org.apache.tapestry.services.DataSqueezer;
import org.apache.tapestry.util.io.SqueezeAdaptor;

/**
 * 
 * @author mb
 */
public class SimpleTableStateAdaptor implements SqueezeAdaptor
{

    private static final String PREFIX = "t";

    /**
     * @see SqueezeAdaptor#getPrefix()
     */
    public String getPrefix()
    {
        return PREFIX;
    }

    /**
     * @see SqueezeAdaptor#getDataClass()
     */
    public Class getDataClass()
    {
        return SimpleTableState.class;
    }

    public String squeeze(DataSqueezer squeezer, Object data)
    {
        SimpleTableState objState = (SimpleTableState) data;

        StringBuffer buf = new StringBuffer();
        buf.append(objState.getPagingState().getPageSize());
        buf.append(":");
        buf.append(objState.getPagingState().getCurrentPage());
        buf.append(":");
        String strSortColumn = objState.getSortingState().getSortColumn();
        if (strSortColumn == null)
            strSortColumn = "";
        buf.append(strSortColumn);
        buf.append(":");
        buf.append(objState.getSortingState().getSortOrder() ? 'T' : 'F');

        return buf.toString();
    }

    public Object unsqueeze(DataSqueezer squeezer, String string)
    {
        StringTokenizer strTok = new StringTokenizer(string, ":");
        if (strTok.countTokens() != 4)
            throw new ApplicationRuntimeException(TableMessages.invalidTableStateFormat(string));
        int nPageSize = Integer.parseInt(strTok.nextToken());
        int nCurrentPage = Integer.parseInt(strTok.nextToken());
        String strSortColumn = strTok.nextToken();
        if (strSortColumn.equals(""))
            strSortColumn = null;
        boolean bSortOrder = strTok.nextToken().equals("T");

        return new SimpleTableState(nPageSize, nCurrentPage, strSortColumn, bSortOrder);
    }

}