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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.
package org.apache.marmotta.platform.core.services.http.response;
public class LastModifiedResponseHandler implements ResponseHandler<Date> {
    // Sun, 06 Nov 1994 08:49:37 GMT ; RFC 822, updated by RFC 1123
    private final SimpleDateFormat RFC_1123 = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss z");
    // Sunday, 06-Nov-94 08:49:37 GMT ; RFC 850, obsoleted by RFC 1036
    private final SimpleDateFormat RFC_1036 = new SimpleDateFormat("EEEE, dd-MMM-yy HH:mm:ss z");
    // Sun Nov 6 08:49:37 1994 ; ANSI C's asctime() format
    private final SimpleDateFormat ANSI_C   = new SimpleDateFormat("EEE MMM d HH:mm:ss yyyy");
    @Override
    public Date handleResponse(HttpResponse responsethrows ClientProtocolExceptionIOException {
        try {
            Header lastModH = response.getFirstHeader("Last-Modified");
            return lastModH != null ? parseDate(lastModH.getValue()) : null;
        } finally {
            EntityUtils.consume(response.getEntity());
        }
    }
    private Date parseDate(String value) {
        try {
            return .parse(value);
        } catch (ParseException e) {
            try {
                return .parse(value);
            } catch (ParseException e1) {
                try {
                    return .parse(value);
                } catch (ParseException e2) {
                    return null;
                }
            }
        }
    }
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