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Product:	IMiS/Storage Connector JAVA
Release:	10.2.2110
Date:	09/02/2022

Case:

Content management using IMiS/Storage Connector JAVA

Description:

This example demonstrates operations which reads, creates, updates and deletes entity's content on the IMiS/ARChive Server.

Below is a description of operations for the content management.

1. Read content part

Operation reads content part with specified identifier.

JAVA

IArchive archive = IMIS_ARCHIVE;
String id= "<entity-identifier>";
String contentPartId = "<content-part-identifier>";

IDocument document = null;
try {
  // Open document in read mode
  document = archive.openDocument(EntityIdKind.INTERNAL, id, null, AccessMode.READ);
  // Find content part with identifier
  IContent content = document.getContent();
  for (IContentPart contentPart : content.getParts()) {
    if (contentPart.getId().equals(contentPartId)) {
      // Read content part and print content
      InputStream inputStream = null;
      ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
      try {
        inputStream = contentPart.openDataInputStream();
        byte[] buffer = new byte[4096];
        int n;
        while (-1 < (n = inputStream.read(buffer, 0, buffer.length)))
          outputStream.write(buffer, 0, n);
        byte[] bytes = outputStream.toByteArray();
        System.out.println(new String(bytes, "UTF-8"));
      }
      catch (Exception e) {
        e.printStackTrace();
        System.out.println(e.getMessage());
      }
      finally {
        if (null != inputStream) {
          try {
            inputStream.close();
          }
          catch (Exception e) {
            e.printStackTrace();
            System.out.println(e.getMessage());
          }
        }
      }
      break;
    }
  }
}
catch (Exception e) {
  e.printStackTrace();
  System.out.println(e.getMessage());
}
finally {
  // Close document
  if (null != document) {
    try {
      document.close();
    }
    catch (Exception e) {
      e.printStackTrace();
      System.out.println(e.getMessage());
    }
  }
}


Result
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nam tempus dapibus efficitur.

2. Create content part

Operation creates new content part in document and adds it to the end of the content part list.

JAVA

IArchive archive = IMIS_ARCHIVE;
String id= "<entity-identifier>";
String contentType = "text/plain";
String description = "lorem.txt";
InputStream inputStream = <input stream of the new content part>;

IDocument document = null;
try {
  // Open document in read-write mode
  document = mArchive.openDocument(EntityIdKind.INTERNAL, id, null, AccessMode.READ_WRITE);
  // Create content part
  IContentPart contentPart = document.createContentPart(contentType);
  // Set content part description
  contentPart.setDescription(description);
  OutputStream outputStream = null;
  try {
    // Open content part output stream and write input stream
    outputStream = contentPart.openDataOutputStream(false);
    byte[] buffer = new byte[4096];
    int n;
    while (-1 != (n = inputStream.read(buffer)))
      outputStream.write(buffer, 0, n);
    outputStream.flush();
  }
  catch (Exception e) {
    e.printStackTrace();
    System.out.println(e.getMessage());
  }
  finally {
    if (null != outputStream) {
      try {
        outputStream.close();
      }
      catch (Exception e) {
        e.printStackTrace();
        System.out.println(e.getMessage());
      }
    }
  }
  // Add content part to the end of content parts list
  IContent content = document.getContent();
  IReadOnlyList<IContentPart> contentParts = content.getParts();
  List<IContentPart> newContentParts = new ArrayList<IContentPart>();
  for (IContentPart part : contentParts)
    newContentParts.add(part);
  newContentParts.add(contentPart);
  content.setParts(newContentParts);
  // Save document
  document.save();
}
catch (Exception e) {
  e.printStackTrace();
  System.out.println(e.getMessage());
}
finally {
  // Close document
  if (null != document) {
    try {
      document.close();
    }
    catch (Exception e) {
      e.printStackTrace();
      System.out.println(e.getMessage());
    }
  }
}

3. Update content part

Operation updates content part in document with specified content part identifier.

JAVA

IArchive archive = IMIS_ARCHIVE;
String id= "<entity-identifier>";
String contentPartId= "<content part identifier>";
String description = "lorem2.txt";
InputStream inputStream = <input stream of the new content part>;

IDocument document = null;
try {
  // Open document in read-write mode
  document = archive.openDocument(EntityIdKind.INTERNAL, id, null, AccessMode.READ_WRITE);
  // Find content part to update
  IContentPart contentPart = null;
  IContent content = document.getContent();
  List<IContentPart> newContentParts = new ArrayList<IContentPart>();
  for (IContentPart part : content.getParts()) {
    if (part.getId().equals(contentPartId))
      contentPart = part;
    newContentParts.add(part);
  }
  if (null == contentPart) {
    System.out.println("Content part not found");
    return;
  }
  // Set content part new description
  contentPart.setDescription(description);
  // Overwrite content part content
  OutputStream outputStream = null;
  try {
    // Open content part output stream and write input stream
    outputStream = contentPart.openDataOutputStream(false);
    byte[] buffer = new byte[4096];
    int n;
    while (-1 != (n = inputStream.read(buffer)))
      outputStream.write(buffer, 0, n);
    outputStream.flush();
  }
  catch (Exception e) {
    e.printStackTrace();
    System.out.println(e.getMessage());
  }
  finally {
    if (null != outputStream) {
      try {
        outputStream.close();
      }
      catch (Exception e) {
        e.printStackTrace();
        System.out.println(e.getMessage());
      }
    }
  }
  // Set content parts list
  content.setParts(newContentParts);
  // Save document
  document.save();
}
catch (Exception e) {
  e.printStackTrace();
  System.out.println(e.getMessage());
}
finally {
  // Close document
  if (null != document) {
    try {
      document.close();
    }
    catch (Exception e) {
      e.printStackTrace();
      System.out.println(e.getMessage());
    }
  }
}

4. Delete content part

Operation deletes content part in document with specified content part identifier.

JAVA

IArchive archive = IMIS_ARCHIVE;
String id= "<entity-identifier>";
String contentPartId = "<content part identifier>";

IDocument document = null;
try {
  // Open document in read-write mode
  document = archive.openDocument(EntityIdKind.INTERNAL, id, null, AccessMode.READ_WRITE);
  IContent content = document.getContent();
  List<IContentPart> newContentParts = new ArrayList<IContentPart>();
  // Add parts to list and skip part which will be deleted
  for (IContentPart part : content.getParts()) {
    if (!part.getId().equals(contentPartId))
      newContentParts.add(part);
  }
  // Set content parts list
  content.setParts(newContentParts);
  // Save document
  document.save();
}
catch (Exception e) {
  e.printStackTrace();
  System.out.println(e.getMessage());
}
finally {
  // Close document
  if (null != document) {
    try {
      document.close();
    }
    catch (Exception e) {
      e.printStackTrace();
      System.out.println(e.getMessage());
    }
  }
}



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