ObjectStream (JHOVE - JSTOR/Harvard Object Validation Environment 1.16.0 API)

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java.lang.Object
- edu.harvard.hul.ois.jhove.module.pdf.ObjectStream

```
public class ObjectStream
extends Object
```
This class implements the Object Stream, a new way of storing objects starting in PDF 1.4. An object stream can contain one or more objects, as described in Section 3.4 of the PostScript manual. JHOVE supports only FlateDecode as a filter for cross-reference streams. This is consistent with the implementation limitation described in Appendix H of the PDF manual for Acrobat 6 and earlier.

Author:

Gary McGath

Constructor Summary

Constructors
Constructor and Description

ObjectStream(PdfStream ostrm, RandomAccessFile raf)
Constructor.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`PdfObject`	`getObject(int objnum)` Extracts an object from the stream.
`boolean`	`isValid()` Checks the validity of the stream dictionary, and extracts information necessary for subsequent reading.
`void`	`readIndex()` Reads the index of the object stream.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ObjectStream

public ObjectStream(PdfStream ostrm,
                    RandomAccessFile raf)

Constructor.

Method Detail
- isValid
```
public boolean isValid()
```
  Checks the validity of the stream dictionary, and extracts information necessary for subsequent reading.
- readIndex
```
public void readIndex()
               throws PdfException,
                      IOException
```
  Reads the index of the object stream.
  
  Throws:
  
  PdfException
  
  IOException
- getObject
```
public PdfObject getObject(int objnum)
                    throws PdfException
```
  Extracts an object from the stream.
  
  Throws:
  
  PdfException

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