Package com.tom_roush.pdfbox.pdmodel.common

Class PDNumberTreeNode

java.lang.Object

com.tom_roush.pdfbox.pdmodel.common.PDNumberTreeNode

All Implemented Interfaces:

COSObjectable

public class PDNumberTreeNode
extends Object
implements COSObjectable

This class represents a PDF Number tree. See the PDF Reference 1.7 section 7.9.7 for more details.

Constructor Summary

Constructors

Constructor	Description
PDNumberTreeNode(COSDictionary dict, Class<? extends COSObjectable> valueClass)	Constructor.
PDNumberTreeNode(Class<? extends COSObjectable> valueClass)	Constructor.

Method Summary

Modifier and Type	Method	Description
protected COSObjectable	convertCOSToPD(COSBase base)	Method to convert the COS value in the number tree to the PD Model object.
protected PDNumberTreeNode	createChildNode(COSDictionary dic)	Create a child node object.
COSDictionary	getCOSObject()	Convert this standard java object to a COS object.
List<PDNumberTreeNode>	getKids()	Return the children of this node.
Integer	getLowerLimit()	Get the lowest value for a key in the number map.
Map<Integer,COSObjectable>	getNumbers()	This will return a map of numbers.
Integer	getUpperLimit()	Get the highest value for a key in the number map.
Object	getValue(Integer index)	Returns the value corresponding to an index in the number tree.
void	setKids(List<? extends PDNumberTreeNode> kids)	Set the children of this number tree.
void	setNumbers(Map<Integer,? extends COSObjectable> numbers)	Set the numbers for this node.

Methods inherited from class java.lang.Object

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

Constructor Detail

PDNumberTreeNode

public PDNumberTreeNode(Class<? extends COSObjectable> valueClass)

Constructor.

Parameters:

valueClass - The PD Model type of object that is the value.

PDNumberTreeNode

public PDNumberTreeNode(COSDictionary dict,
                        Class<? extends COSObjectable> valueClass)

Constructor.

Parameters:

dict - The dictionary that holds the number information.

valueClass - The PD Model type of object that is the value.

Method Detail

getCOSObject

public COSDictionary getCOSObject()

Convert this standard java object to a COS object.

Specified by:

getCOSObject in interface COSObjectable

Returns:

The cos object that matches this Java object.

getKids

public List<PDNumberTreeNode> getKids()

Return the children of this node. This list will contain PDNumberTreeNode objects.

Returns:

The list of children or null if there are no children.

setKids

public void setKids(List<? extends PDNumberTreeNode> kids)

Set the children of this number tree.

Parameters:

kids - The children of this number tree. These have to be in sorted order. Because of that, it is usually easier to call setNumbers(java.util.Map<java.lang.Integer,? extends com.tom_roush.pdfbox.pdmodel.common.COSObjectable>) with a map and pass a single element list here.

getValue

public Object getValue(Integer index)
                throws IOException

Returns the value corresponding to an index in the number tree.

Parameters:

index - The index in the number tree.

Returns:

The value corresponding to the index.

Throws:

IOException - If there is a problem creating the values.

getNumbers

public Map<Integer,COSObjectable> getNumbers()
                                            throws IOException

This will return a map of numbers. The key will be a java.lang.Integer, the value will depend on where this class is being used.

Returns:

A map of COS objects.

Throws:

IOException - If there is a problem creating the values.

convertCOSToPD

protected COSObjectable convertCOSToPD(COSBase base)
                                throws IOException

Method to convert the COS value in the number tree to the PD Model object. The default implementation will simply use reflection to create the correct object type. Subclasses can do whatever they want.

Parameters:

base - The COS object to convert.

Returns:

The converted PD Model object.

Throws:

IOException - If there is an error during creation.

createChildNode

protected PDNumberTreeNode createChildNode(COSDictionary dic)

Create a child node object.

Parameters:

dic - The dictionary for the child node object to refer to.

Returns:

The new child node object.

setNumbers

public void setNumbers(Map<Integer,? extends COSObjectable> numbers)

Set the numbers for this node. This method will set the appropriate upper and lower limits based on the keys in the map and take care of the ordering.

Parameters:

numbers - The map of numbers to objects, or null for nothing.

getUpperLimit

public Integer getUpperLimit()

Get the highest value for a key in the number map.

Returns:

The highest value for a key in the map.

getLowerLimit

public Integer getLowerLimit()

Get the lowest value for a key in the number map.

Returns:

The lowest value for a key in the map.