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/*
 * ====================================================================
 * 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
 * .
 *
 */

package org.apache.http.impl.cookie;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;

import org.apache.http.HeaderElement;
import org.apache.http.NameValuePair;
import org.apache.http.annotation.Contract;
import org.apache.http.annotation.ThreadingBehavior;
import org.apache.http.cookie.CommonCookieAttributeHandler;
import org.apache.http.cookie.Cookie;
import org.apache.http.cookie.CookieAttributeHandler;
import org.apache.http.cookie.CookieOrigin;
import org.apache.http.cookie.MalformedCookieException;
import org.apache.http.util.Args;

/**
 * Cookie management functions shared by all specification.
 *
 * @since 4.0
 */
@Contract(threading = ThreadingBehavior.SAFE)
public abstract class CookieSpecBase extends AbstractCookieSpec {

    public CookieSpecBase() {
        super();
    }

    /**
     * @since 4.4
     */
    protected CookieSpecBase(final HashMap map) {
        super(map);
    }

    /**
     * @since 4.4
     */
    protected CookieSpecBase(final CommonCookieAttributeHandler... handlers) {
        super(handlers);
    }

    protected static String getDefaultPath(final CookieOrigin origin) {
        String defaultPath = origin.getPath();
        int lastSlashIndex = defaultPath.lastIndexOf('/');
        if (lastSlashIndex >= 0) {
            if (lastSlashIndex == 0) {
                //Do not remove the very first slash
                lastSlashIndex = 1;
            }
            defaultPath = defaultPath.substring(0, lastSlashIndex);
        }
        return defaultPath;
    }

    protected static String getDefaultDomain(final CookieOrigin origin) {
        return origin.getHost();
    }

    protected List parse(final HeaderElement[] elems, final CookieOrigin origin)
                throws MalformedCookieException {
        final List cookies = new ArrayList(elems.length);
        for (final HeaderElement headerelement : elems) {
            final String name = headerelement.getName();
            final String value = headerelement.getValue();
            if (name == null || name.isEmpty()) {
                continue;
            }

            final BasicClientCookie cookie = new BasicClientCookie(name, value);
            cookie.setPath(getDefaultPath(origin));
            cookie.setDomain(getDefaultDomain(origin));

            // cycle through the parameters
            final NameValuePair[] attribs = headerelement.getParameters();
            for (int j = attribs.length - 1; j >= 0; j--) {
                final NameValuePair attrib = attribs[j];
                final String s = attrib.getName().toLowerCase(Locale.ROOT);

                cookie.setAttribute(s, attrib.getValue());

                final CookieAttributeHandler handler = findAttribHandler(s);
                if (handler != null) {
                    handler.parse(cookie, attrib.getValue());
                }
            }
            cookies.add(cookie);
        }
        return cookies;
    }

    @Override
    public void validate(final Cookie cookie, final CookieOrigin origin)
            throws MalformedCookieException {
        Args.notNull(cookie, "Cookie");
        Args.notNull(origin, "Cookie origin");
        for (final CookieAttributeHandler handler: getAttribHandlers()) {
            handler.validate(cookie, origin);
        }
    }

    @Override
    public boolean match(final Cookie cookie, final CookieOrigin origin) {
        Args.notNull(cookie, "Cookie");
        Args.notNull(origin, "Cookie origin");
        for (final CookieAttributeHandler handler: getAttribHandlers()) {
            if (!handler.match(cookie, origin)) {
                return false;
            }
        }
        return true;
    }

}