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diff --git a/src/org/apache/http/params/BasicHttpParams.java b/src/org/apache/http/params/BasicHttpParams.java
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+++ b/src/org/apache/http/params/BasicHttpParams.java
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+/*
+ * $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/params/BasicHttpParams.java $
+ * $Revision: 610464 $
+ * $Date: 2008-01-09 09:10:55 -0800 (Wed, 09 Jan 2008) $
+ *
+ * ====================================================================
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF 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.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation.  For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ *
+ */
+
+package org.apache.http.params;
+
+import java.io.Serializable;
+import java.util.Map;
+import java.util.HashMap;
+import java.util.Iterator;
+
+import org.apache.http.params.HttpParams;
+
+/**
+ * This class represents a collection of HTTP protocol parameters.
+ * Protocol parameters may be linked together to form a hierarchy.
+ * If a particular parameter value has not been explicitly defined
+ * in the collection itself, its value will be drawn from the parent 
+ * collection of parameters.
+ * 
+ * @author <a href="mailto:oleg at ural.ru">Oleg Kalnichevski</a>
+ * 
+ * @version $Revision: 610464 $
+ */
+public final class BasicHttpParams extends AbstractHttpParams
+    implements Serializable, Cloneable {
+
+    private static final long serialVersionUID = -7086398485908701455L;
+
+    /** Map of HTTP parameters that this collection contains. */
+    private HashMap parameters;
+
+    public BasicHttpParams() {
+        super();
+    }
+
+    public Object getParameter(final String name) {
+        // See if the parameter has been explicitly defined
+        Object param = null;
+        if (this.parameters != null) {
+            param = this.parameters.get(name);
+        }    
+        return param;
+    }
+
+    public HttpParams setParameter(final String name, final Object value) {
+        if (this.parameters == null) {
+            this.parameters = new HashMap();
+        }
+        this.parameters.put(name, value);
+        return this;
+    }
+    
+    public boolean removeParameter(String name) {
+        if (this.parameters == null) {
+            return false;
+        }
+        //this is to avoid the case in which the key has a null value
+        if (this.parameters.containsKey(name)) {
+            this.parameters.remove(name);
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    
+    /**
+     * Assigns the value to all the parameter with the given names
+     * 
+     * @param names array of parameter name
+     * @param value parameter value
+     */ 
+    public void setParameters(final String[] names, final Object value) {
+        for (int i = 0; i < names.length; i++) {
+            setParameter(names[i], value);
+        }
+    }
+
+    public boolean isParameterSet(final String name) {
+        return getParameter(name) != null;
+    }
+        
+    public boolean isParameterSetLocally(final String name) {
+        return this.parameters != null && this.parameters.get(name) != null;
+    }
+        
+    /**
+     * Removes all parameters from this collection.
+     */
+    public void clear() {
+        this.parameters = null;
+    }
+
+    /**
+     * Creates a copy of these parameters.
+     * The implementation here instantiates {@link BasicHttpParams}, 
+     * then calls {@link #copyParams(HttpParams)} to populate the copy.
+     *
+     * @return  a new set of params holding a copy of the
+     *          <i>local</i> parameters in this object.
+     */
+    public HttpParams copy() {
+        BasicHttpParams clone = new BasicHttpParams();
+        copyParams(clone);
+        return clone;
+    }
+
+    public Object clone() throws CloneNotSupportedException {
+        BasicHttpParams clone = (BasicHttpParams) super.clone();
+        copyParams(clone);
+        return clone;
+    }
+ 
+    /**
+     * Copies the locally defined parameters to the argument parameters.
+     * This method is called from {@link #copy()}.
+     *
+     * @param target    the parameters to which to copy
+     */
+    protected void copyParams(HttpParams target) {
+        if (this.parameters == null)
+            return;
+
+        Iterator iter = parameters.entrySet().iterator();
+        while (iter.hasNext()) {
+            Map.Entry me = (Map.Entry) iter.next();
+            if (me.getKey() instanceof String)
+                target.setParameter((String)me.getKey(), me.getValue());
+        }
+    }
+    
+}