001// Copyright 2004, 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
015package org.apache.tapestry.util.io;
016
017import org.apache.tapestry.services.DataSqueezer;
018
019/**
020 * Squeezes a {@link Double}.
021 * 
022 * @author Howard Lewis Ship
023 */
024
025public class DoubleAdaptor implements SqueezeAdaptor
026{
027    private static final String PREFIX = "d";
028
029    public String getPrefix()
030    {
031        return PREFIX;
032    }
033
034    public Class getDataClass()
035    {
036        return Double.class;
037    }
038
039    /**
040     * Invoked <code>toString()</code> on data (which is type {@link Double}), and prefixs the
041     * result.
042     */
043
044    public String squeeze(DataSqueezer squeezer, Object data)
045    {
046        return PREFIX + data.toString();
047    }
048
049    /**
050     * Constructs an {@link Double} from the string, after stripping the prefix.
051     */
052
053    public Object unsqueeze(DataSqueezer squeezer, String string)
054    {
055        return new Double(string.substring(1));
056    }
057
058}