AbstractStructuredObject (Apache FOP 2.7 API)
Date: 2022-01-12

org.apache.fop.afp.modca

## Class AbstractStructuredObject

- java.lang.Object
- - org.apache.fop.afp.modca.AbstractAFPObject
  - - org.apache.fop.afp.modca.AbstractStructuredObject

- All Implemented Interfaces:
    Streamable
  Direct Known Subclasses:
    AbstractTripletStructuredObject, ImageContent, MapCodedFont, Tile

      public abstract class AbstractStructuredObject
      extends AbstractAFPObject

  An abstract class encapsulating an MODCA structured object

- - ### Nested Class Summary

    - ### Nested classes/interfaces inherited from class org.apache.fop.afp.modca.AbstractAFPObject

      `AbstractAFPObject.Category, AbstractAFPObject.Type`

  - ### Field Summary

    - ### Fields inherited from class org.apache.fop.afp.modca.AbstractAFPObject

      `LOG, SF_CLASS, SF_HEADER_LENGTH`

  - ### Constructor Summary

    Constructors
    Modifier | Constructor and Description
    --- | ---
    `protected` | `AbstractStructuredObject()` Default constructor

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `protected void` | `writeContent(java.io.OutputStream os)` Helper method to write the contents of the Object.
    `protected void` | `writeEnd(java.io.OutputStream os)` Helper method to write the end of the Object.
    `protected void` | `writeStart(java.io.OutputStream os)` Helper method to write the start of the Object.
    `void` | `writeToStream(java.io.OutputStream os)` DataStream objects must implement the writeToStream() method to write its data to the given OutputStream

    - ### Methods inherited from class org.apache.fop.afp.modca.AbstractAFPObject

      `copySF, copySF, truncate, writeChunksToStream, writeObjects`

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Constructor Detail

    - #### AbstractStructuredObject

          protected AbstractStructuredObject()

      Default constructor

  - ### Method Detail

    - #### writeStart

          protected void writeStart(java.io.OutputStream os)
                             throws java.io.IOException

      Helper method to write the start of the Object.
      Parameters:
        `os` - The stream to write to
      Throws:
        `java.io.IOException` - throws an I/O exception if one occurred

    - #### writeEnd

          protected void writeEnd(java.io.OutputStream os)
                           throws java.io.IOException

      Helper method to write the end of the Object.
      Parameters:
        `os` - The stream to write to
      Throws:
        `java.io.IOException` - an I/O exception if one occurred

    - #### writeContent

          protected void writeContent(java.io.OutputStream os)
                               throws java.io.IOException

      Helper method to write the contents of the Object.
      Parameters:
        `os` - The stream to write to
      Throws:
        `java.io.IOException` - throws an I/O exception if one occurred

    - #### writeToStream

          public void writeToStream(java.io.OutputStream os)
                             throws java.io.IOException

      DataStream objects must implement the writeToStream() method to write its data to the given OutputStream
      Parameters:
        `os` - the outputsteam stream
      Throws:
        `java.io.IOException` - an I/O exception of some sort has occurred.

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