Package org.apache.poi.poifs.property

Class Property

java.lang.Object
org.apache.poi.poifs.property.Property
All Implemented Interfaces:
POIFSViewable, Child
Direct Known Subclasses:
DirectoryProperty, DocumentProperty
public abstract class Property extends Object implements Child, POIFSViewable
This abstract base class is the ancestor of all classes implementing POIFS Property behavior.

  • Method Details

    • writeData

      public void writeData(OutputStream stream) throws IOException
      Write the raw data to an OutputStream.
      Parameters:
      stream - the OutputStream to which the data should be written.
      Throws:
      IOException - on problems writing to the specified stream.

    • setStartBlock

      public void setStartBlock(int startBlock)
      Set the start block for the document referred to by this Property.
      Parameters:
      startBlock - the start block index

    • getStartBlock

      public int getStartBlock()
      Returns:
      the start block

    • getSize

      public int getSize()
      find out the document size
      Returns:
      size in bytes

    • shouldUseSmallBlocks

      public boolean shouldUseSmallBlocks()
      Based on the currently defined size, should this property use small blocks?
      Returns:
      true if the size is less than _big_block_minimum_bytes

    • isSmall

      public static boolean isSmall(int length)
      does the length indicate a small document?
      Parameters:
      length - length in bytes
      Returns:
      true if the length is less than _big_block_minimum_bytes

    • getName

      public String getName()
      Get the name of this property
      Returns:
      property name as String

    • isDirectory

      public abstract boolean isDirectory()
      Returns:
      true if a directory type Property

    • getStorageClsid

      public ClassID getStorageClsid()
      Sets the storage clsid, which is the Class ID of a COM object which reads and writes this stream
      Returns:
      storage Class ID for this property stream

    • setStorageClsid

      public void setStorageClsid(ClassID clsidStorage)
      Sets the storage class ID for this property stream. This is the Class ID of the COM object which can read and write this property stream
      Parameters:
      clsidStorage - Storage Class ID

    • getNextChild

      public Child getNextChild()
      Get the next Child, if any
      Specified by:
      getNextChild in interface Child
      Returns:
      the next Child; may return null

    • getPreviousChild

      public Child getPreviousChild()
      Get the previous Child, if any
      Specified by:
      getPreviousChild in interface Child
      Returns:
      the previous Child; may return null

    • setNextChild

      public void setNextChild(Child child)
      Set the next Child
      Specified by:
      setNextChild in interface Child
      Parameters:
      child - the new 'next' child; may be null, which has the effect of saying there is no 'next' child

    • setPreviousChild

      public void setPreviousChild(Child child)
      Set the previous Child
      Specified by:
      setPreviousChild in interface Child
      Parameters:
      child - the new 'previous' child; may be null, which has the effect of saying there is no 'previous' child

    • getViewableArray

      public Object[] getViewableArray()
      Get an array of objects, some of which may implement POIFSViewable
      Specified by:
      getViewableArray in interface POIFSViewable
      Returns:
      an array of Object; may not be null, but may be empty

    • getViewableIterator

      public Iterator<Object> getViewableIterator()
      Get an Iterator of objects, some of which may implement POIFSViewable
      Specified by:
      getViewableIterator in interface POIFSViewable
      Returns:
      an Iterator; may not be null, but may have an empty back end store

    • preferArray

      public boolean preferArray()
      Give viewers a hint as to whether to call getViewableArray or getViewableIterator
      Specified by:
      preferArray in interface POIFSViewable
      Returns:
      true if a viewer should call getViewableArray, false if a viewer should call getViewableIterator

    • getShortDescription

      public String getShortDescription()
      Provides a short description of the object, to be used when a POIFSViewable object has not provided its contents.
      Specified by:
      getShortDescription in interface POIFSViewable
      Returns:
      short description