File	Doc	Category	Size	Date	Package
DirectoryProperty.java	API Doc	Apache Poi 3.0.1	8954	Mon Jan 01 12:39:36 GMT 2007	org.apache.poi.poifs.property

DirectoryProperty

• java.lang.Object
  • org.apache.poi.poifs.property.Property

Fields Summary
private List	_children
private Set	_children_names

Constructors Summary
public DirectoryProperty(String name) Default constructor param name the name of the directory super(); _children = new ArrayList(); _children_names = new HashSet(); setName(name); setSize(0); setPropertyType(PropertyConstants.DIRECTORY_TYPE); setStartBlock(0); setNodeColor(_NODE_BLACK); // simplification
protected DirectoryProperty(int index, byte[] array, int offset) reader constructor param index index number param array byte data param offset offset into byte data super(index, array, offset); _children = new ArrayList(); _children_names = new HashSet();

Methods Summary
public void	addChild(org.apache.poi.poifs.property.Property property) Add a new child to the collection of children param property the new child to be added; must not be null exception IOException if we already have a child with the same name String name = property.getName(); if (_children_names.contains(name)) { throw new IOException("Duplicate name \"" + name + "\""); } _children_names.add(name); _children.add(property);
public boolean	changeName(org.apache.poi.poifs.property.Property property, java.lang.String newName) Change a Property's name param property the Property whose name is being changed param newName the new name for the Property return true if the name change could be made, else false boolean result; String oldName = property.getName(); property.setName(newName); String cleanNewName = property.getName(); if (_children_names.contains(cleanNewName)) { // revert the change property.setName(oldName); result = false; } else { _children_names.add(cleanNewName); _children_names.remove(oldName); result = true; } return result;
public boolean	deleteChild(org.apache.poi.poifs.property.Property property) Delete a Property param property the Property being deleted return true if the Property could be deleted, else false boolean result = _children.remove(property); if (result) { _children_names.remove(property.getName()); } return result;
public java.util.Iterator	getChildren() Get an iterator over the children of this Parent; all elements are instances of Property. return Iterator of children; may refer to an empty collection return _children.iterator();
public boolean	isDirectory() return true if a directory type Property return true;
protected void	preWrite() Perform whatever activities need to be performed prior to writing if (_children.size() > 0) { Property[] children = ( Property [] ) _children.toArray(new Property[ 0 ]); Arrays.sort(children, new PropertyComparator()); int midpoint = children.length / 2; setChildProperty(children[ midpoint ].getIndex()); children[ 0 ].setPreviousChild(null); children[ 0 ].setNextChild(null); for (int j = 1; j < midpoint; j++) { children[ j ].setPreviousChild(children[ j - 1 ]); children[ j ].setNextChild(null); } if (midpoint != 0) { children[ midpoint ] .setPreviousChild(children[ midpoint - 1 ]); } if (midpoint != (children.length - 1)) { children[ midpoint ].setNextChild(children[ midpoint + 1 ]); for (int j = midpoint + 1; j < children.length - 1; j++) { children[ j ].setPreviousChild(null); children[ j ].setNextChild(children[ j + 1 ]); } children[ children.length - 1 ].setPreviousChild(null); children[ children.length - 1 ].setNextChild(null); } else { children[ midpoint ].setNextChild(null); } }