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## org.apache.fop.afp.modca
Class Overlay

    java.lang.Object
      org.apache.fop.afp.modca.AbstractAFPObject
          org.apache.fop.afp.modca.AbstractStructuredObject
              org.apache.fop.afp.modca.AbstractTripletStructuredObject
                  org.apache.fop.afp.modca.AbstractNamedAFPObject
                      org.apache.fop.afp.modca.AbstractPageObject
                          org.apache.fop.afp.modca.AbstractResourceGroupContainer
                              org.apache.fop.afp.modca.PageObject
                                  org.apache.fop.afp.modca.Overlay

All Implemented Interfaces:
  Completable, Streamable

    public class Overlay

extends PageObject

An overlay is a MO:DCA-P resource object. It may be stored in an external resource library or it may be carried in a resource group. An overlay is similar to a page in that it defines its own environment and carries the same data objects.

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.AbstractResourceGroupContainer
`resourceGroup, started`

Fields inherited from class org.apache.fop.afp.modca.AbstractPageObject
`activeEnvironmentGroup, complete, factory, objects, rotation`

Fields inherited from class org.apache.fop.afp.modca.AbstractNamedAFPObject
`name`

Fields inherited from class org.apache.fop.afp.modca.AbstractTripletStructuredObject
`triplets`

Fields inherited from class org.apache.fop.afp.modca.AbstractAFPObject
`LOG, SF_CLASS, SF_HEADER_LENGTH`

Constructor Summary
`Overlay(Factory factory, java.lang.String name, int width, int height, int rotation, int widthResolution, int heightResolution)` Construct a new overlay object for the specified name argument, the overlay name should be an 8 character identifier.

Method Summary
`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.

Methods inherited from class org.apache.fop.afp.modca.PageObject
`addObject, canWrite, createIncludePageOverlay, createShading, toString`

Methods inherited from class org.apache.fop.afp.modca.AbstractResourceGroupContainer
`getResourceCount, getResourceGroup, hasResources, writeObjects, writeObjects, writeToStream`

Methods inherited from class org.apache.fop.afp.modca.AbstractPageObject
`createFont, createIncludePageSegment, createLine, createNoOperation, createTagLogicalElement, createText, endPage, endPresentationObject, getActiveEnvironmentGroup, getHeight, getPresentationTextObject, getRotation, getTagLogicalElements, getWidth, isComplete, setComplete`

Methods inherited from class org.apache.fop.afp.modca.AbstractNamedAFPObject
`copySF, getName, getNameBytes, getNameLength, setName`

Methods inherited from class org.apache.fop.afp.modca.AbstractTripletStructuredObject
`addTriplet, addTriplets, getFullyQualifiedName, getTripletDataLength, getTriplets, hasTriplet, hasTriplets, setComment, setFullyQualifiedName, setObjectClassification, writeTriplets`

Methods inherited from class org.apache.fop.afp.modca.AbstractAFPObject
`copySF, truncate, writeChunksToStream`

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

Constructor Detail

### Overlay

    public Overlay(Factory factory,
                   java.lang.String name,
                   int width,
                   int height,
                   int rotation,
                   int widthResolution,
                   int heightResolution)

  Construct a new overlay object for the specified name argument, the overlay name should be an 8 character identifier.

  Parameters:
    `factory` - the resource manager of the page.
    `name` - the name of the page.
    `width` - the width of the page.
    `height` - the height of the page.
    `rotation` - the rotation of the page.
    `widthResolution` - the width resolution of the page.
    `heightResolution` - the height resolution of the page.

Method Detail

### writeStart

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

  Helper method to write the start of the Object.

  Overrides:
    `writeStart` in class `PageObject`
  Parameters:
    `os` - The stream to write to
  Throws:
    `java.io.IOException` - throws 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.

  Overrides:
    `writeContent` in class `PageObject`
  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.

  Overrides:
    `writeEnd` in class `PageObject`
  Parameters:
    `os` - The stream to write to
  Throws:
    `java.io.IOException` - an I/O exception if one occurred

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