PDFXObject (Apache FOP 2.1 API)

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fop 2.1

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java.lang.Object
- org.apache.fop.pdf.PDFObject
- - org.apache.fop.pdf.AbstractPDFStream
  - - org.apache.fop.pdf.PDFXObject

All Implemented Interfaces:

PDFWritable

Direct Known Subclasses:

PDFFormXObject, PDFImageXObject
```
public abstract class PDFXObject
extends AbstractPDFStream
```
Abstract base class of PDF XObjects. A derivative of the PDF Object, is a PDF Stream that has not only a dictionary but a stream of image data. The dictionary just provides information like the stream length. This outputs the image dictionary and the image data. This is used as a reference for inserting the same image in the document in another place.

Field Summary
- Fields inherited from class org.apache.fop.pdf.PDFObject
  log

Constructor Summary

Constructors
Modifier Constructor Description

PDFXObject()
Create an XObject with the given number.

protected PDFXObject(PDFDictionary dictionary)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`PDFName`	`getName()`	Returns the XObject's name.
`protected int`	`getSizeHint()`	Returns a value that hints at the size of the encoded stream.
`protected void`	`populateStreamDict(java.lang.Object lengthEntry)`	Populates the dictionary with all necessary entries for the stream.

Methods inherited from class org.apache.fop.pdf.AbstractPDFStream
encodeAndWriteStream, encodeStream, get, getChildren, getDefaultFilterName, getDictionary, getFilterList, multipleFiltersAllowed, output, outputRawStreamData, outputStreamData, prepareImplicitFilters, put, registerChildren, setDocument, setupFilterList

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

Methods inherited from class org.apache.fop.pdf.PDFObject
contentEquals, encode, encodeBinaryToHexString, encodeString, encodeText, formatObject, getDocument, getDocumentSafely, getGeneration, getObjectID, getObjectNumber, getParent, hasObjectNumber, makeReference, outputInline, referencePDF, setObjectNumber, setObjectNumber, setObjectNumber, setParent, toPDF, toPDFString

- Constructor Detail
  - PDFXObject
```
public PDFXObject()
```
    Create an XObject with the given number.
  - PDFXObject
```
protected PDFXObject(PDFDictionary dictionary)
```
- Method Detail
  - getName
```
public PDFName getName()
```
    Returns the XObject's name.
    
    Returns:
    
    the name of the XObject
  - populateStreamDict
```
protected void populateStreamDict(java.lang.Object lengthEntry)
```
    Populates the dictionary with all necessary entries for the stream. Override this method if you need additional entries.
    
    Overrides:
    
    populateStreamDict in class AbstractPDFStream
    
    Parameters:
    
    lengthEntry - value for the /Length entry
  - getSizeHint
```
protected int getSizeHint()
                   throws java.io.IOException
```
    Returns a value that hints at the size of the encoded stream. This is used to optimize buffer allocation so fewer buffer reallocations are necessary.
    
    Specified by:
    
    getSizeHint in class AbstractPDFStream
    
    Returns:
    
    an estimated size (0 if no hint can be given)
    
    Throws:
    
    java.io.IOException - in case of an I/O problem

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