org.kurento.repository.RepositoryItemAttributes Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of kurento-repository-internal Show documentation
Kurento Repository library is a Java API allowing access to repository services in Kurento.
There is a newer version: 6.14.0
Show newest version
/*
 * (C) Copyright 2013 Kurento (http://kurento.org/)
 *
 * Licensed 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.kurento.repository;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;

/**
 * Attributes implementation.
 */
public class RepositoryItemAttributes {

  /**
   * HTTP date format.
   */
  protected static final SimpleDateFormat format =
      new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss zzz", Locale.US);

  /**
   * Date formats using for Date parsing.
   */
  protected static final SimpleDateFormat[] formats =
      { new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss zzz", Locale.US),
          new SimpleDateFormat("EEEEEE, dd-MMM-yy HH:mm:ss zzz", Locale.US),
          new SimpleDateFormat("EEE MMMM d HH:mm:ss yyyy", Locale.US) };

  protected static final TimeZone gmtZone = TimeZone.getTimeZone("GMT");

  /**
   * GMT timezone - all HTTP dates are on GMT.
   */
  static {

    format.setTimeZone(gmtZone);

    formats[0].setTimeZone(gmtZone);
    formats[1].setTimeZone(gmtZone);
    formats[2].setTimeZone(gmtZone);

  }

  /**
   * Content length.
   */
  protected long contentLength = -1;

  /**
   * Creation time.
   */
  protected long creation = -1;

  /**
   * Creation date.
   */
  protected Date creationDate;

  /**
   * Last modified time.
   */
  protected long lastModified = -1;

  /**
   * Last modified date.
   */
  protected Date lastModifiedDate;

  /**
   * Last modified date in HTTP format.
   */
  protected String lastModifiedHttp;

  /**
   * MIME type.
   */
  protected String mimeType;

  /**
   * Weak ETag.
   */
  protected String weakETag;

  /**
   * Strong ETag.
   */
  protected String strongETag;

  /**
   * Get content length.
   *
   * @return content length value
   */
  public long getContentLength() {
    return contentLength;
  }

  /**
   * Set content length.
   *
   * @param contentLength
   *          New content length value
   */
  public void setContentLength(long contentLength) {
    this.contentLength = contentLength;
  }

  /**
   * Get creation time.
   *
   * @return creation time value
   */
  public long getCreation() {
    return creation;
  }

  /**
   * Get creation date.
   *
   * @return Creation date value
   */
  public Date getCreationDate() {
    return creationDate;
  }

  /**
   * Creation date mutator.
   *
   * @param creationDate
   *          New creation date
   */
  public void setCreationDate(Date creationDate) {
    this.creationDate = creationDate;
    this.creation = creationDate.getTime();
  }

  /**
   * Creation date mutator.
   *
   * @param creation
   *          New creation date as a long
   */
  public void setCreation(long creation) {
    this.creation = creation;
    this.creationDate = new Date(creation);
  }

  public void setCreationDateHttp(String creationDateValue) throws ParseException {
    this.creationDate = parseHttpDate(creationDateValue);
    this.creation = creationDate.getTime();
  }

  /**
   * Get last modified time.
   *
   * @return lastModified time value
   */
  public long getLastModified() {
    return lastModified;
  }

  /**
   * Set last modified.
   *
   * @param lastModified
   *          New last modified value
   */
  public void setLastModified(long lastModified) {
    this.lastModified = lastModified;
    this.lastModifiedDate = new Date(lastModified);
  }

  /**
   * Get lastModified date.
   *
   * @return LastModified date value
   */
  public Date getLastModifiedDate() {
    return lastModifiedDate;
  }

  /**
   * Last modified date mutator.
   *
   * @param lastModifiedDate
   *          New last modified date
   */
  public void setLastModifiedDate(Date lastModifiedDate) {
    this.lastModified = lastModifiedDate.getTime();
    this.lastModifiedDate = lastModifiedDate;
  }

  /**
   * @return Returns the lastModifiedHttp.
   */
  public String getLastModifiedHttp() {

    if (lastModifiedHttp != null) {
      return lastModifiedHttp;
    }

    Date modifiedDate = getLastModifiedDate();
    if (modifiedDate == null) {
      modifiedDate = getCreationDate();
    }

    if (modifiedDate == null) {
      modifiedDate = new Date();
    }

    synchronized (format) {
      lastModifiedHttp = format.format(modifiedDate);
    }

    return lastModifiedHttp;
  }

  private Date parseHttpDate(String creationDate) throws ParseException {

    Date newCreationDate = null;

    // Parsing the HTTP Date
    for (int i = 0; newCreationDate == null && i < formats.length; i++) {
      try {
        newCreationDate = formats[i].parse(creationDate);
      } catch (ParseException e) {
        // Ignore
      }
    }

    if (newCreationDate == null) {
      throw new ParseException("Exception while parsing http date", -1);
    } else {
      return newCreationDate;
    }
  }

  /**
   * @param lastModifiedHttp
   *          The lastModifiedHttp to set.
   * @throws ParseException
   *           in case the http date can't be parsed
   */
  public void setLastModifiedHttp(String lastModifiedHttp) throws ParseException {
    this.lastModifiedDate = parseHttpDate(lastModifiedHttp);
    this.lastModified = lastModifiedDate.getTime();
    this.lastModifiedHttp = lastModifiedHttp;
  }

  /**
   * @return Returns the mimeType.
   */
  public String getMimeType() {
    return mimeType;
  }

  /**
   * @param mimeType
   *          The mimeType to set.
   */
  public void setMimeType(String mimeType) {
    this.mimeType = mimeType;
  }

  /**
   * Get ETag.
   *
   * @return strong ETag if available, else weak ETag.
   */
  public String getETag() {

    String result = null;

    if (strongETag != null) {
      // The strong ETag must always be calculated by the resources
      result = strongETag;
    } else {
      // The weakETag is contentLength + lastModified
      if (weakETag == null) {
        long contentLength = getContentLength();
        long lastModified = getLastModified();
        if (contentLength >= 0 || lastModified >= 0) {
          weakETag = "W/\"" + contentLength + "-" + lastModified + "\"";
        }
      }
      result = weakETag;
    }

    return result;
  }

  /**
   * Set strong ETag.
   */
  public void setETag(String eTag) {
    this.strongETag = eTag;
  }

}