tapestry-framework/src/org/apache/tapestry/util/io/DoubleAdaptor.java

//  Copyright 2004 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.

package org.apache.tapestry.util.io;

/**
 *  Squeezes a {@link Double}. 
 *
 *  @author Howard Lewis Ship
 *  @version $Id$
 *
 **/

class DoubleAdaptor implements ISqueezeAdaptor
{
    private static final String PREFIX = "d";

    /**
     *  Registers using the prefix 'd'.
     *
     **/

    public void register(DataSqueezer squeezer)
    {
        squeezer.register(PREFIX, Double.class, this);
    }

    /**
     *  Invoked <code>toString()</code> on data (which is type {@link Double}),
     *  and prefixs the result.
     *
     **/

    public String squeeze(DataSqueezer squeezer, Object data)
    {
        return PREFIX + data.toString();
    }

    /**
     *  Constructs an {@link Double} from the string, after stripping
     *  the prefix.
     *
     **/

    public Object unsqueeze(DataSqueezer squeezer, String string)
    {
        return new Double(string.substring(1));
    }

}