/*
 * $Id$ [Apr 5, 2004]
 *
 * Copyright (c) 2004, Ben Fortuna
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  o Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *
 *  o Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 *
 *  o Neither the name of Ben Fortuna nor the names of any other contributors
 * may be used to endorse or promote products derived from this software
 * without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package net.fortuna.ical4j.model;

import java.io.Serializable;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;

/**
 * Defines a list of iCalendar parameters. A parameter list may be specified as
 * unmodifiable at instantiation - useful for constant properties that you don't
 * want modified.
 *
 * @author Ben Fortuna
 */
public class ParameterList implements Serializable {
    
    private static final long serialVersionUID = -1913059830016450169L;

    private List parameters;

    /**
     * Default constructor. Creates a modifiable parameter list.
     */
    public ParameterList() {
        this(false);
    }
    
    /**
     * Constructor.
     */
    public ParameterList(final boolean unmodifiable) {
        if (unmodifiable) {
            parameters = Collections.unmodifiableList(new ArrayList());
        }
        else {
            parameters = new ArrayList();
        }
    }
    
    /**
     * Creates a deep copy of the specified parameter list. That is,
     * copies of all parameters in the specified list are added to
     * this list.
     * @param list a parameter list to copy parameters from
     * @throws URISyntaxException
     */
    public ParameterList(final ParameterList list, final boolean unmodifiable) throws URISyntaxException {
        parameters = new ArrayList();
        for (Iterator i = list.iterator(); i.hasNext();) {
            Parameter parameter = (Parameter) i.next();
            parameters.add(ParameterFactoryImpl.getInstance().createParameter(parameter.getName(), parameter.getValue()));
        }
        if (unmodifiable) {
            parameters = Collections.unmodifiableList(parameters);
        }
    }

    /**
     * @see java.util.AbstractCollection#toString()
     */
    public final String toString() {

        StringBuffer buffer = new StringBuffer();

        for (Iterator i = parameters.iterator(); i.hasNext();) {

            buffer.append(';');
            buffer.append(i.next().toString());
        }

        return buffer.toString();
    }

    /**
     * Returns the first parameter with the specified name.
     *
     * @param aName
     *            name of the parameter
     * @return the first matching parameter or null if no matching parameters
     */
    public final Parameter getParameter(final String aName) {

        for (Iterator i = parameters.iterator(); i.hasNext();) {
            Parameter p = (Parameter) i.next();

            if (aName.equals(p.getName())) {
                return p;
            }
        }

        return null;
    }

    /**
     * Returns a list of parameters with the specified name.
     * @param name
     *            name of parameters to return
     * @return a parameter list
     */
    public final ParameterList getParameters(final String name) {
        ParameterList list = new ParameterList();

        for (Iterator i = parameters.iterator(); i.hasNext();) {
            Parameter p = (Parameter) i.next();

            if (p.getName().equals(name)) {
                list.add(p);
            }
        }
        return list;
    }

    /**
     * Add a parameter to the list.
     * @param parameter the parameter to add
     * @return true
     * @see List#add(java.lang.Object)
     */
    public final boolean add(final Parameter parameter) {
        return parameters.add(parameter);
    }

    /**
     * @return boolean indicates if the list is empty
     * @see List#isEmpty()
     */
    public final boolean isEmpty() {
        return parameters.isEmpty();
    }

    /**
     * @return an iterator
     * @see List#iterator()
     */
    public final Iterator iterator() {
        return parameters.iterator();
    }

    /**
     * Remove a parameter from the list
     * @param parameter the parameter to remove
     * @return true if the list contained the specified parameter
     * @see List#remove(java.lang.Object)
     */
    public final boolean remove(final Parameter parameter) {
        return parameters.remove(parameter);
    }

    /**
     * @return the number of parameters in the list
     * @see List#size()
     */
    public final int size() {
        return parameters.size();
    }

    /**
     * Two parameter lists are equals if and only if
     * they contain the same set of parameters.
     * @see java.lang.Object#equals(java.lang.Object)
     */
    public final boolean equals(final Object arg0) {
        if (arg0 instanceof ParameterList) {
            ParameterList p = (ParameterList) arg0;
            for (Iterator i = p.iterator(); i.hasNext();) {
                if (!parameters.contains(i.next())) {
                    return false;
                }
            }
            return true;
        }
        return super.equals(arg0);
    }

    /*
     * (non-Javadoc)
     * 
     * @see java.lang.Object#hashCode()
     */
    public final int hashCode() {
        int hash = 0;
        for (Iterator i = iterator(); i.hasNext();) {
            hash += i.next().hashCode();
        }
        return hash;
    }
}
@@ -4806,24 +4806,207 @@
 to the list.
+ Note that this method will also remove from the%0A     * list all other parameters with the same name. This is under the assumption%0A     * that a parameter may only be specified once. 
 %0A     * @par
@@ -5156,32 +5156,173 @@
 er parameter) %7B%0A
+        for (Iterator i = getParameters(parameter.getName()).iterator(); i.hasNext();) %7B%0A            remove((Parameter) i.next());%0A        %7D%0A
         return p

Remove other parameters of the same name when adding a parameter