non-releases/trunk_before_flattening/src/java/org/apache/cocoon/components/modules/input/RandomNumberModule.java

/*
 * Copyright 1999-2004 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.cocoon.components.modules.input;

import org.apache.avalon.framework.configuration.Configuration;
import org.apache.avalon.framework.configuration.ConfigurationException;
import org.apache.avalon.framework.thread.ThreadSafe;

import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Vector;

/**
 * RandomNumberModule returns a random number as a string.
 * Configuration through child elements: "min", "max" setting
 * range of random number. Defaults to "0" and "9999999999"
 * respectively.
 *
 * @version $Id$
 */
public class RandomNumberModule extends AbstractInputModule implements ThreadSafe {

    final static Vector returnNames;
    static {
        Vector tmp = new Vector();
        tmp.add("randomNumber");
        returnNames = tmp;
    }

    public Object getAttribute( String name, Configuration modeConf, Map objectModel ) throws ConfigurationException {
        
        long min = 0;
        long max = java.lang.Long.MAX_VALUE;
        if (modeConf != null) {
            min = Long.parseLong(modeConf.getAttribute("min","0"));
            max = Long.parseLong(modeConf.getAttribute("max",String.valueOf(max)));
            
            //preferred
            min = Long.parseLong(modeConf.getChild("min").getValue("0"));
            max = Long.parseLong(modeConf.getChild("max").getValue(String.valueOf(max)));
        }
        return Long.toString(java.lang.Math.round(java.lang.Math.random()*(max-min)));

    }


    public Iterator getAttributeNames( Configuration modeConf, Map objectModel ) throws ConfigurationException {

        return RandomNumberModule.returnNames.iterator();
    }


    public Object[] getAttributeValues( String name, Configuration modeConf, Map objectModel )
        throws ConfigurationException {

            List values = new LinkedList();
            values.add( this.getAttribute(name, modeConf, objectModel ) );

            return values.toArray();
            
    }

}