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 * 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/>.
 *
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package org.apache.http.protocol;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.apache.http.HttpException;
import org.apache.http.HttpRequest;
import org.apache.http.HttpRequestInterceptor;
import org.apache.http.HttpResponse;
import org.apache.http.HttpResponseInterceptor;
import org.apache.http.util.Args;

Default implementation of HttpProcessor. 

Please note access to the internal structures of this class is not
synchronized and therefore this class may be thread-unsafe.
Since:
4.0
Deprecated:
(4.3)/**
 * Default implementation of {@link HttpProcessor}.
 * <p>
 * Please note access to the internal structures of this class is not
 * synchronized and therefore this class may be thread-unsafe.
 *
 * @since 4.0
 *
 * @deprecated (4.3)
 */
@Deprecated
public final class BasicHttpProcessor implements
    HttpProcessor, HttpRequestInterceptorList, HttpResponseInterceptorList, Cloneable {

    // Don't allow direct access, as nulls are not allowed
    protected final List<HttpRequestInterceptor> requestInterceptors = new ArrayList<HttpRequestInterceptor>();
    protected final List<HttpResponseInterceptor> responseInterceptors = new ArrayList<HttpResponseInterceptor>();

    @Override
    public void addRequestInterceptor(final HttpRequestInterceptor itcp) {
        if (itcp == null) {
            return;
        }
        this.requestInterceptors.add(itcp);
    }

    @Override
    public void addRequestInterceptor(
            final HttpRequestInterceptor itcp, final int index) {
        if (itcp == null) {
            return;
        }
        this.requestInterceptors.add(index, itcp);
    }

    @Override
    public void addResponseInterceptor(
            final HttpResponseInterceptor itcp, final int index) {
        if (itcp == null) {
            return;
        }
        this.responseInterceptors.add(index, itcp);
    }

    @Override
    public void removeRequestInterceptorByClass(final Class<? extends HttpRequestInterceptor> clazz) {
        for (final Iterator<HttpRequestInterceptor> it = this.requestInterceptors.iterator();
             it.hasNext(); ) {
            final Object request = it.next();
            if (request.getClass().equals(clazz)) {
                it.remove();
            }
        }
    }

    @Override
    public void removeResponseInterceptorByClass(final Class<? extends HttpResponseInterceptor> clazz) {
        for (final Iterator<HttpResponseInterceptor> it = this.responseInterceptors.iterator();
             it.hasNext(); ) {
            final Object request = it.next();
            if (request.getClass().equals(clazz)) {
                it.remove();
            }
        }
    }

    public final void addInterceptor(final HttpRequestInterceptor interceptor) {
        addRequestInterceptor(interceptor);
    }

     public final void addInterceptor(final HttpRequestInterceptor interceptor, final int index) {
        addRequestInterceptor(interceptor, index);
    }

    @Override
    public int getRequestInterceptorCount() {
        return this.requestInterceptors.size();
    }

    @Override
    public HttpRequestInterceptor getRequestInterceptor(final int index) {
        if ((index < 0) || (index >= this.requestInterceptors.size())) {
            return null;
        }
        return this.requestInterceptors.get(index);
    }

    @Override
    public void clearRequestInterceptors() {
        this.requestInterceptors.clear();
    }

    @Override
    public void addResponseInterceptor(final HttpResponseInterceptor itcp) {
        if (itcp == null) {
            return;
        }
        this.responseInterceptors.add(itcp);
    }

    public final void addInterceptor(final HttpResponseInterceptor interceptor) {
        addResponseInterceptor(interceptor);
    }

    public final void addInterceptor(final HttpResponseInterceptor interceptor, final int index) {
        addResponseInterceptor(interceptor, index);
    }

    @Override
    public int getResponseInterceptorCount() {
        return this.responseInterceptors.size();
    }

    @Override
    public HttpResponseInterceptor getResponseInterceptor(final int index) {
        if ((index < 0) || (index >= this.responseInterceptors.size())) {
            return null;
        }
        return this.responseInterceptors.get(index);
    }

    @Override
    public void clearResponseInterceptors() {
        this.responseInterceptors.clear();
    }

    
Sets the interceptor lists.
First, both interceptor lists maintained by this processor
will be cleared.
Subsequently,
elements of the argument list that are request interceptors will be
added to the request interceptor list.
Elements that are response interceptors will be
added to the response interceptor list.
Elements that are both request and response interceptor will be
added to both lists.
Elements that are neither request nor response interceptor
will be ignored.
Params:
list –      the list of request and response interceptors
                 from which to initialize/**
     * Sets the interceptor lists.
     * First, both interceptor lists maintained by this processor
     * will be cleared.
     * Subsequently,
     * elements of the argument list that are request interceptors will be
     * added to the request interceptor list.
     * Elements that are response interceptors will be
     * added to the response interceptor list.
     * Elements that are both request and response interceptor will be
     * added to both lists.
     * Elements that are neither request nor response interceptor
     * will be ignored.
     *
     * @param list      the list of request and response interceptors
     *                  from which to initialize
     */
    @Override
    public void setInterceptors(final List<?> list) {
        Args.notNull(list, "Inteceptor list");
        this.requestInterceptors.clear();
        this.responseInterceptors.clear();
        for (final Object obj : list) {
            if (obj instanceof HttpRequestInterceptor) {
                addInterceptor((HttpRequestInterceptor) obj);
            }
            if (obj instanceof HttpResponseInterceptor) {
                addInterceptor((HttpResponseInterceptor) obj);
            }
        }
    }

    
Clears both interceptor lists maintained by this processor.
/**
     * Clears both interceptor lists maintained by this processor.
     */
    public void clearInterceptors() {
        clearRequestInterceptors();
        clearResponseInterceptors();
    }

    @Override
    public void process(
            final HttpRequest request,
            final HttpContext context)
            throws IOException, HttpException {
        for (final HttpRequestInterceptor interceptor : this.requestInterceptors) {
            interceptor.process(request, context);
        }
    }

    @Override
    public void process(
            final HttpResponse response,
            final HttpContext context)
            throws IOException, HttpException {
        for (final HttpResponseInterceptor interceptor : this.responseInterceptors) {
            interceptor.process(response, context);
        }
    }

    
Sets up the target to have the same list of interceptors
as the current instance.
Params:
target – object to be initialised/**
     * Sets up the target to have the same list of interceptors
     * as the current instance.
     *
     * @param target object to be initialised
     */
    protected void copyInterceptors(final BasicHttpProcessor target) {
        target.requestInterceptors.clear();
        target.requestInterceptors.addAll(this.requestInterceptors);
        target.responseInterceptors.clear();
        target.responseInterceptors.addAll(this.responseInterceptors);
    }

    
Creates a copy of this instance
Returns:
new instance of the BasicHttpProcessor/**
     * Creates a copy of this instance
     *
     * @return new instance of the BasicHttpProcessor
     */
    public BasicHttpProcessor copy() {
        final BasicHttpProcessor clone = new BasicHttpProcessor();
        copyInterceptors(clone);
        return clone;
    }

    @Override
    public Object clone() throws CloneNotSupportedException {
        final BasicHttpProcessor clone = (BasicHttpProcessor) super.clone();
        copyInterceptors(clone);
        return clone;
    }

}