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GraphHopper is a fast and memory efficient Java road routing engine working seamlessly with OpenStreetMap data.
There is a newer version: 0.7.0
/*
 *  Licensed to GraphHopper and Peter Karich under one or more contributor
 *  license agreements. See the NOTICE file distributed with this work for 
 *  additional information regarding copyright ownership.
 * 
 *  GraphHopper licenses this file to you 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 com.graphhopper.util;

import java.util.HashMap;
import java.util.Map;

/**
 * A properties map with convenient accessors
 * 
 * @author Peter Karich
 */
public class PMap
{
    private final Map map;

    public PMap()
    {
        this(5);
    }

    public PMap( int capacity )
    {
        this(new HashMap(capacity));
    }

    public PMap( Map map )
    {
        this.map = map;
    }

    public PMap( String propertiesString )
    {
        // five chosen as arbitrary initial capacity
        this.map = new HashMap(5);

        for (String s : propertiesString.split("\\|"))
        {
            s = s.trim();
            int index = s.indexOf("=");
            if (index < 0)
                continue;

            this.map.put(s.substring(0, index).toLowerCase(), s.substring(index + 1));
        }
    }

    public PMap put( PMap map )
    {
        this.map.putAll(map.map);
        return this;
    }

    public PMap put( String key, Object str )
    {
        if (str == null)
            throw new NullPointerException("Value cannot be null. Use remove instead.");

        map.put(key.toLowerCase(), str.toString());
        return this;
    }

    public PMap remove( String key )
    {
        map.remove(key.toLowerCase());
        return this;
    }

    public long getLong( String key, long _default )
    {
        String str = get(key);
        if (!Helper.isEmpty(str))
        {
            try
            {
                return Long.parseLong(str);
            } catch (Exception ex)
            {
            }
        }
        return _default;
    }

    public int getInt( String key, int _default )
    {
        String str = get(key);
        if (!Helper.isEmpty(str))
        {
            try
            {
                return Integer.parseInt(str);
            } catch (Exception ex)
            {
            }
        }
        return _default;
    }

    public boolean getBool( String key, boolean _default )
    {
        String str = get(key);
        if (!Helper.isEmpty(str))
        {
            try
            {
                return Boolean.parseBoolean(str);
            } catch (Exception ex)
            {
            }
        }
        return _default;
    }

    public double getDouble( String key, double _default )
    {
        String str = get(key);
        if (!Helper.isEmpty(str))
        {
            try
            {
                return Double.parseDouble(str);
            } catch (Exception ex)
            {
            }
        }
        return _default;
    }

    public String get( String key, String _default )
    {
        String str = get(key);
        if (Helper.isEmpty(str))
        {
            return _default;
        }
        return str;
    }

    String get( String key )
    {
        if (Helper.isEmpty(key))
        {
            return "";
        }
        String val = map.get(key.toLowerCase());
        if (val == null)
        {
            return "";
        }
        return val;
    }

    /**
     * This method copies the underlying structur into a new Map object
     */
    public Map toMap()
    {
        return new HashMap(map);
    }

    private Map getMap()
    {
        return map;
    }

    public PMap merge( PMap read )
    {
        return merge(read.getMap());
    }

    PMap merge( Map map )
    {
        for (Map.Entry e : map.entrySet())
        {
            if (Helper.isEmpty(e.getKey()))
            {
                continue;
            }
            this.getMap().put(e.getKey().toLowerCase(), e.getValue());
        }
        return this;
    }

    public boolean has( String key )
    {
        return this.getMap().containsKey(key);
    }

    @Override
    public String toString()
    {
        return this.getMap().toString();
    }
}