Signal-Android/src/org/thoughtcrime/securesms/attachments/Attachment.java

package org.thoughtcrime.securesms.attachments;

import android.net.Uri;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;

import org.thoughtcrime.securesms.database.AttachmentDatabase;

public abstract class Attachment {

  @NonNull
  private final String  contentType;
  private final int     transferState;
  private final long    size;

  @Nullable
  private final String  location;

  @Nullable
  private final String  key;

  @Nullable
  private final String relay;

  @Nullable
  private final byte[] digest;

  public Attachment(@NonNull String contentType, int transferState, long size,
                    @Nullable String location, @Nullable String key, @Nullable String relay,
                    @Nullable byte[] digest)
  {
    this.contentType   = contentType;
    this.transferState = transferState;
    this.size          = size;
    this.location      = location;
    this.key           = key;
    this.relay         = relay;
    this.digest        = digest;
  }

  @Nullable
  public abstract Uri getDataUri();

  @Nullable
  public abstract Uri getThumbnailUri();

  public int getTransferState() {
    return transferState;
  }

  public boolean isInProgress() {
    return transferState != AttachmentDatabase.TRANSFER_PROGRESS_DONE &&
           transferState != AttachmentDatabase.TRANSFER_PROGRESS_FAILED;
  }

  public long getSize() {
    return size;
  }

  @NonNull
  public String getContentType() {
    return contentType;
  }

  @Nullable
  public String getLocation() {
    return location;
  }

  @Nullable
  public String getKey() {
    return key;
  }

  @Nullable
  public String getRelay() {
    return relay;
  }

  @Nullable
  public byte[] getDigest() {
    return digest;
  }
}