/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * particular file as subject to the "Classpath" exception as provided

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 */

package com.sun.corba.se.spi.orb ;

import java.util.List ;

import java.util.LinkedList ;

import java.util.Map ;

import java.util.HashMap ;

import java.util.Iterator ;

import java.util.Properties ;

import com.sun.corba.se.impl.orb.ParserAction ;

import com.sun.corba.se.impl.orb.ParserActionFactory ;

public class PropertyParser {

    private List actions ;

    public PropertyParser( )

    {

        actions = new LinkedList() ;

    }

    public PropertyParser add( String propName,

        Operation action, String fieldName )

    {

        actions.add( ParserActionFactory.makeNormalAction( propName,

            action, fieldName ) ) ;

        return this ;

    }

    public PropertyParser addPrefix( String propName,

        Operation action, String fieldName, Class componentType )

    {

        actions.add( ParserActionFactory.makePrefixAction( propName,

            action, fieldName, componentType ) ) ;

        return this ;

    }

    /** Return a map from field name to value.

    */

    public Map parse( Properties props )

    {

        Map map = new HashMap() ;

        Iterator iter = actions.iterator() ;

        while (iter.hasNext()) {

            ParserAction act = (ParserAction)(iter.next()) ;

            Object result = act.apply( props ) ;

            // A null result means that the property was not set for

            // this action, so do not override the default value in this case.

            if (result != null)

                map.put( act.getFieldName(), result ) ;

        }

        return map ;

    }

    public Iterator iterator()

    {

        return actions.iterator() ;

    }

}