How to use

containsKey

method

in

org.apache.commons.collections4.MultiMap

/**
 * {@inheritDoc}
 * <p>
 * Note: uses the index for fast lookup
 */
@SuppressWarnings("unchecked")
@Override
public boolean contains(final Object object) {
  return index.containsKey(keyTransformer.transform((C) object));
}

/**
 * Provides checking for adding the index.
 *
 * @param object the object to index
 * @throws IllegalArgumentException if the object maps to an existing key and the index
 *   enforces a uniqueness constraint
 */
private void addToIndex(final C object) {
  final K key = keyTransformer.transform(object);
  if (uniqueIndex && index.containsKey(key)) {
    throw new IllegalArgumentException("Duplicate key in uniquely indexed collection.");
  }
  index.put(key, object);
}

@Override
public boolean containsHeader(String name) {
  return headers.containsKey(name);
}

public InMemoryCachedEntry(byte[] out, String contentType, String characterEncoding, int statusCode, MultiMap headers, long modificationDate, String originalUrl, int timeToLiveInSeconds) throws IOException {
  super(contentType, characterEncoding, statusCode, headers, modificationDate, originalUrl, timeToLiveInSeconds);
  // content which is actually of a compressed type must stay that way
  if (GZipUtil.isGZipped(out)) {
    this.gzippedContent = out;
    boolean isGzippedResponse = headers.containsKey("Content-Encoding") && ((Collection)headers.get("Content-Encoding")).contains("gzip");
    if(isGzippedResponse){
      this.plainContent = GZipUtil.ungzip(out);
    }
    // in case of serving a gzip file (gif for instance)
    else{
      this.plainContent = null;
    }
  } else {
    this.gzippedContent = GZipUtil.gzip(out);
    this.plainContent = out;
  }
}