JHotDraw 7.4.1

net.n3.nanoxml
Class XMLElement

java.lang.Object
  extended by net.n3.nanoxml.XMLElement
All Implemented Interfaces:
java.io.Serializable, IXMLElement

public class XMLElement
extends java.lang.Object
implements IXMLElement, java.io.Serializable

XMLElement is an XML element. The standard NanoXML builder generates a tree of such elements.

Version:
$Name: RELEASE_2_2_1 $, $Revision: 1.5 $
Author:
Marc De Scheemaecker
See Also:
StdXMLBuilder, Serialized Form

Field Summary
static int NO_LINE
          No line number defined.
 
Constructor Summary
XMLElement()
          Creates an empty element to be used for #PCDATA content.
XMLElement(java.lang.String fullName)
          Creates an empty element.
XMLElement(java.lang.String fullName, java.lang.String namespace)
          Creates an empty element.
XMLElement(java.lang.String fullName, java.lang.String systemID, int lineNr)
          Creates an empty element.
XMLElement(java.lang.String fullName, java.lang.String namespace, java.lang.String systemID, int lineNr)
          Creates an empty element.
 
Method Summary
 void addChild(IXMLElement child)
          Adds a child element.
 IXMLElement createElement(java.lang.String fullName)
          Creates an empty element.
 IXMLElement createElement(java.lang.String fullName, java.lang.String namespace)
          Creates an empty element.
 IXMLElement createElement(java.lang.String fullName, java.lang.String systemID, int lineNr)
          Creates an empty element.
 IXMLElement createElement(java.lang.String fullName, java.lang.String namespace, java.lang.String systemID, int lineNr)
          Creates an empty element.
 IXMLElement createPCDataElement()
          Creates an element to be used for #PCDATA content.
 void dispose()
          Gets rid of the XMLElement and of all its children.
 boolean equals(java.lang.Object rawElement)
          Returns true if the element equals another element.
 boolean equalsXMLElement(IXMLElement elt)
          Returns true if the element equals another element.
 java.lang.String getAttribute(java.lang.String name)
          Deprecated. As of NanoXML/Java 2.1, replaced by getAttribute(java.lang.String,java.lang.String) Returns the value of an attribute.
 int getAttribute(java.lang.String name, int defaultValue)
          Returns the value of an attribute.
 java.lang.String getAttribute(java.lang.String name, java.lang.String defaultValue)
          Returns the value of an attribute.
 int getAttribute(java.lang.String name, java.lang.String namespace, int defaultValue)
          Returns the value of an attribute.
 java.lang.Object getAttribute(java.lang.String name, java.lang.String namespace, java.util.Map valueSet, java.lang.String defaultKey)
          Returns an attribute by looking up a key in a hashtable.
 java.lang.String getAttribute(java.lang.String name, java.lang.String namespace, java.lang.String defaultValue)
          Returns the value of an attribute.
 int getAttributeCount()
          Returns the number of attributes.
 java.lang.String getAttributeNamespace(java.lang.String name)
          Returns the namespace of an attribute.
 java.util.Properties getAttributes()
          Returns all attributes as a Properties object.
 java.util.Properties getAttributesInNamespace(java.lang.String namespace)
          Returns all attributes in a specific namespace as a Properties object.
 java.lang.String getAttributeType(java.lang.String name)
          Returns the type of an attribute.
 java.lang.String getAttributeType(java.lang.String name, java.lang.String namespace)
          Returns the type of an attribute.
 IXMLElement getChildAtIndex(int index)
          Returns the child at a specific index.
 java.util.ArrayList getChildren()
          Returns a vector containing all the child iterator.
 int getChildrenCount()
          Returns the number of children.
 java.util.ArrayList getChildrenNamed(java.lang.String name)
          Returns a vector of all child iterator named name.
 java.util.ArrayList getChildrenNamed(java.lang.String name, java.lang.String namespace)
          Returns a vector of all child iterator named name.
 java.lang.String getContent()
          Return the #PCDATA content of the element.
 double getDoubleAttribute(java.lang.String name, java.lang.String namespace, double defaultValue)
          Returns an attribute of the element.
 IXMLElement getFirstChildNamed(java.lang.String name)
          Searches a child element.
 IXMLElement getFirstChildNamed(java.lang.String name, java.lang.String namespace)
          Searches a child element.
 java.lang.String getFullName()
          Returns the full name (i.e. the name including an eventual namespace prefix) of the element.
 int getLineNr()
          Returns the line number in the data where the element started.
 java.lang.String getName()
          Returns the name of the element.
 java.lang.String getNamespace()
          Returns the namespace of the element.
 IXMLElement getParent()
          Returns the parent element.
 java.lang.String getSystemID()
          Returns the system ID of the data where the element started.
 boolean hasAttribute(java.lang.String name)
          Returns whether an attribute exists.
 boolean hasAttribute(java.lang.String name, java.lang.String namespace)
          Returns whether an attribute exists.
 boolean hasChildren()
          Returns whether the element has children.
 void insertChild(IXMLElement child, int index)
          Inserts a child element.
 boolean isLeaf()
          Returns whether the element is a leaf element.
 java.util.Iterator iterateAttributeNames()
          Returns an enumeration of all attribute names.
 java.util.Iterator iterateChildren()
          Returns an enumeration of all child iterator.
 void removeAttribute(java.lang.String name)
          Removes an attribute.
 void removeAttribute(java.lang.String name, java.lang.String namespace)
          Removes an attribute.
 void removeChild(IXMLElement child)
          Removes a child element.
 void removeChildAtIndex(int index)
          Removes the child located at a certain index.
 void setAttribute(java.lang.String name, java.lang.String value)
          Sets an attribute.
 void setAttribute(java.lang.String fullName, java.lang.String namespace, java.lang.String value)
          Sets an attribute.
 void setContent(java.lang.String content)
          Sets the #PCDATA content.
 void setName(java.lang.String name)
          Sets the full name.
 void setName(java.lang.String fullName, java.lang.String namespace)
          Sets the name.
 java.lang.String toString()
           
 
Methods inherited from class java.lang.Object
clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Field Detail

NO_LINE

public static final int NO_LINE
No line number defined.

See Also:
Constant Field Values
Constructor Detail

XMLElement

public XMLElement()
Creates an empty element to be used for #PCDATA content.


XMLElement

public XMLElement(java.lang.String fullName)
Creates an empty element.

Parameters:
fullName - the name of the element.

XMLElement

public XMLElement(java.lang.String fullName,
                  java.lang.String systemID,
                  int lineNr)
Creates an empty element.

Parameters:
fullName - the name of the element.
systemID - the system ID of the XML data where the element starts.
lineNr - the line in the XML data where the element starts.

XMLElement

public XMLElement(java.lang.String fullName,
                  java.lang.String namespace)
Creates an empty element.

Parameters:
fullName - the full name of the element
namespace - the namespace URI.

XMLElement

public XMLElement(java.lang.String fullName,
                  java.lang.String namespace,
                  java.lang.String systemID,
                  int lineNr)
Creates an empty element.

Parameters:
fullName - the full name of the element
namespace - the namespace URI.
systemID - the system ID of the XML data where the element starts.
lineNr - the line in the XML data where the element starts.
Method Detail

createPCDataElement

public IXMLElement createPCDataElement()
Creates an element to be used for #PCDATA content.

Specified by:
createPCDataElement in interface IXMLElement

createElement

public IXMLElement createElement(java.lang.String fullName)
Creates an empty element.

Specified by:
createElement in interface IXMLElement
Parameters:
fullName - the name of the element.

createElement

public IXMLElement createElement(java.lang.String fullName,
                                 java.lang.String systemID,
                                 int lineNr)
Creates an empty element.

Specified by:
createElement in interface IXMLElement
Parameters:
fullName - the name of the element.
systemID - the system ID of the XML data where the element starts.
lineNr - the line in the XML data where the element starts.

createElement

public IXMLElement createElement(java.lang.String fullName,
                                 java.lang.String namespace)
Creates an empty element.

Specified by:
createElement in interface IXMLElement
Parameters:
fullName - the full name of the element
namespace - the namespace URI.

createElement

public IXMLElement createElement(java.lang.String fullName,
                                 java.lang.String namespace,
                                 java.lang.String systemID,
                                 int lineNr)
Creates an empty element.

Specified by:
createElement in interface IXMLElement
Parameters:
fullName - the full name of the element
namespace - the namespace URI.
systemID - the system ID of the XML data where the element starts.
lineNr - the line in the XML data where the element starts.

getParent

public IXMLElement getParent()
Returns the parent element. This method returns null for the root element.

Specified by:
getParent in interface IXMLElement

getFullName

public java.lang.String getFullName()
Returns the full name (i.e. the name including an eventual namespace prefix) of the element.

Specified by:
getFullName in interface IXMLElement
Returns:
the name, or null if the element only contains #PCDATA.

getName

public java.lang.String getName()
Returns the name of the element.

Specified by:
getName in interface IXMLElement
Returns:
the name, or null if the element only contains #PCDATA.

getNamespace

public java.lang.String getNamespace()
Returns the namespace of the element.

Specified by:
getNamespace in interface IXMLElement
Returns:
the namespace, or null if no namespace is associated with the element.

setName

public void setName(java.lang.String name)
Sets the full name. This method also sets the short name and clears the namespace URI.

Specified by:
setName in interface IXMLElement
Parameters:
name - the non-null name.

setName

public void setName(java.lang.String fullName,
                    java.lang.String namespace)
Sets the name.

Specified by:
setName in interface IXMLElement
Parameters:
fullName - the non-null full name.
namespace - the namespace URI, which may be null.

addChild

public void addChild(IXMLElement child)
Adds a child element.

Specified by:
addChild in interface IXMLElement
Parameters:
child - the non-null child to add.

insertChild

public void insertChild(IXMLElement child,
                        int index)
Inserts a child element.

Parameters:
child - the non-null child to add.
index - where to put the child.

removeChild

public void removeChild(IXMLElement child)
Removes a child element.

Specified by:
removeChild in interface IXMLElement
Parameters:
child - the non-null child to remove.

removeChildAtIndex

public void removeChildAtIndex(int index)
Removes the child located at a certain index.

Specified by:
removeChildAtIndex in interface IXMLElement
Parameters:
index - the index of the child, where the first child has index 0.

iterateChildren

public java.util.Iterator iterateChildren()
Returns an enumeration of all child iterator.

Specified by:
iterateChildren in interface IXMLElement
Returns:
the non-null enumeration

isLeaf

public boolean isLeaf()
Returns whether the element is a leaf element.

Specified by:
isLeaf in interface IXMLElement
Returns:
true if the element has no children.

hasChildren

public boolean hasChildren()
Returns whether the element has children.

Specified by:
hasChildren in interface IXMLElement
Returns:
true if the element has children.

getChildrenCount

public int getChildrenCount()
Returns the number of children.

Specified by:
getChildrenCount in interface IXMLElement
Returns:
the count.

getChildren

public java.util.ArrayList getChildren()
Returns a vector containing all the child iterator.

Specified by:
getChildren in interface IXMLElement
Returns:
the vector.

getChildAtIndex

public IXMLElement getChildAtIndex(int index)
                            throws java.lang.ArrayIndexOutOfBoundsException
Returns the child at a specific index.

Specified by:
getChildAtIndex in interface IXMLElement
Parameters:
index - the index of the child
Returns:
the non-null child
Throws:
java.lang.ArrayIndexOutOfBoundsException - if the index is out of bounds.

getFirstChildNamed

public IXMLElement getFirstChildNamed(java.lang.String name)
Searches a child element.

Specified by:
getFirstChildNamed in interface IXMLElement
Parameters:
name - the full name of the child to search for.
Returns:
the child element, or null if no such child was found.

getFirstChildNamed

public IXMLElement getFirstChildNamed(java.lang.String name,
                                      java.lang.String namespace)
Searches a child element.

Specified by:
getFirstChildNamed in interface IXMLElement
Parameters:
name - the name of the child to search for.
namespace - the namespace, which may be null.
Returns:
the child element, or null if no such child was found.

getChildrenNamed

public java.util.ArrayList getChildrenNamed(java.lang.String name)
Returns a vector of all child iterator named name.

Specified by:
getChildrenNamed in interface IXMLElement
Parameters:
name - the full name of the children to search for.
Returns:
the non-null vector of child iterator.

getChildrenNamed

public java.util.ArrayList getChildrenNamed(java.lang.String name,
                                            java.lang.String namespace)
Returns a vector of all child iterator named name.

Specified by:
getChildrenNamed in interface IXMLElement
Parameters:
name - the name of the children to search for.
namespace - the namespace, which may be null.
Returns:
the non-null vector of child iterator.

getAttributeCount

public int getAttributeCount()
Returns the number of attributes.

Specified by:
getAttributeCount in interface IXMLElement

getAttribute

public java.lang.String getAttribute(java.lang.String name)
Deprecated. As of NanoXML/Java 2.1, replaced by getAttribute(java.lang.String,java.lang.String) Returns the value of an attribute.

Specified by:
getAttribute in interface IXMLElement
Parameters:
name - the non-null name of the attribute.
Returns:
the value, or null if the attribute does not exist.

getAttribute

public java.lang.String getAttribute(java.lang.String name,
                                     java.lang.String defaultValue)
Returns the value of an attribute.

Specified by:
getAttribute in interface IXMLElement
Parameters:
name - the non-null full name of the attribute.
defaultValue - the default value of the attribute.
Returns:
the value, or defaultValue if the attribute does not exist.

getAttribute

public java.lang.String getAttribute(java.lang.String name,
                                     java.lang.String namespace,
                                     java.lang.String defaultValue)
Returns the value of an attribute.

Specified by:
getAttribute in interface IXMLElement
Parameters:
name - the non-null name of the attribute.
namespace - the namespace URI, which may be null.
defaultValue - the default value of the attribute.
Returns:
the value, or defaultValue if the attribute does not exist.

getDoubleAttribute

public double getDoubleAttribute(java.lang.String name,
                                 java.lang.String namespace,
                                 double defaultValue)
Returns an attribute of the element. If the attribute doesn't exist, defaultValue is returned.

Specified by:
getDoubleAttribute in interface IXMLElement
Parameters:
name - The name of the attribute.
namespace - the namespace URI, which may be null.
defaultValue - Key to use if the attribute is missing.

getAttribute

public int getAttribute(java.lang.String name,
                        int defaultValue)
Returns the value of an attribute.

Specified by:
getAttribute in interface IXMLElement
Parameters:
name - the non-null full name of the attribute.
defaultValue - the default value of the attribute.
Returns:
the value, or defaultValue if the attribute does not exist.

getAttribute

public int getAttribute(java.lang.String name,
                        java.lang.String namespace,
                        int defaultValue)
Returns the value of an attribute.

Specified by:
getAttribute in interface IXMLElement
Parameters:
name - the non-null name of the attribute.
namespace - the namespace URI, which may be null.
defaultValue - the default value of the attribute.
Returns:
the value, or defaultValue if the attribute does not exist.

getAttribute

public java.lang.Object getAttribute(java.lang.String name,
                                     java.lang.String namespace,
                                     java.util.Map valueSet,
                                     java.lang.String defaultKey)
Returns an attribute by looking up a key in a hashtable. If the attribute doesn't exist, the value corresponding to defaultKey is returned.

As an example, if valueSet contains the mapping "one" => "1" and the element contains the attribute attr="one", then getAttribute("attr", mapping, defaultKey, false) returns "1".

Specified by:
getAttribute in interface IXMLElement
Parameters:
name - The name of the attribute.
namespace - the namespace URI, which may be null.
valueSet - HashMap mapping keySet().iterator to values.
defaultKey - Key to use if the attribute is missing.
Preconditions:
  • name != null
  • name is a valid XML identifier
  • valueSet != null
  • the keySet().iterator of valueSet are strings

getAttributeType

public java.lang.String getAttributeType(java.lang.String name)
Returns the type of an attribute.

Specified by:
getAttributeType in interface IXMLElement
Parameters:
name - the non-null full name of the attribute.
Returns:
the type, or null if the attribute does not exist.

getAttributeNamespace

public java.lang.String getAttributeNamespace(java.lang.String name)
Returns the namespace of an attribute.

Specified by:
getAttributeNamespace in interface IXMLElement
Parameters:
name - the non-null full name of the attribute.
Returns:
the namespace, or null if there is none associated.

getAttributeType

public java.lang.String getAttributeType(java.lang.String name,
                                         java.lang.String namespace)
Returns the type of an attribute.

Specified by:
getAttributeType in interface IXMLElement
Parameters:
name - the non-null name of the attribute.
namespace - the namespace URI, which may be null.
Returns:
the type, or null if the attribute does not exist.

setAttribute

public void setAttribute(java.lang.String name,
                         java.lang.String value)
Sets an attribute.

Specified by:
setAttribute in interface IXMLElement
Parameters:
name - the non-null full name of the attribute.
value - the non-null value of the attribute.

setAttribute

public void setAttribute(java.lang.String fullName,
                         java.lang.String namespace,
                         java.lang.String value)
Sets an attribute.

Specified by:
setAttribute in interface IXMLElement
Parameters:
fullName - the non-null full name of the attribute.
namespace - the namespace URI of the attribute, which may be null.
value - the non-null value of the attribute.

removeAttribute

public void removeAttribute(java.lang.String name)
Removes an attribute.

Specified by:
removeAttribute in interface IXMLElement
Parameters:
name - the non-null name of the attribute.

removeAttribute

public void removeAttribute(java.lang.String name,
                            java.lang.String namespace)
Removes an attribute.

Specified by:
removeAttribute in interface IXMLElement
Parameters:
name - the non-null name of the attribute.
namespace - the namespace URI of the attribute, which may be null.

iterateAttributeNames

public java.util.Iterator iterateAttributeNames()
Returns an enumeration of all attribute names.

Specified by:
iterateAttributeNames in interface IXMLElement
Returns:
the non-null enumeration.

hasAttribute

public boolean hasAttribute(java.lang.String name)
Returns whether an attribute exists.

Specified by:
hasAttribute in interface IXMLElement
Parameters:
name - the non-null name of the attribute.
Returns:
true if the attribute exists.

hasAttribute

public boolean hasAttribute(java.lang.String name,
                            java.lang.String namespace)
Returns whether an attribute exists.

Specified by:
hasAttribute in interface IXMLElement
Parameters:
name - the non-null name of the attribute.
namespace - the namespace URI of the attribute, which may be null.
Returns:
true if the attribute exists.

getAttributes

public java.util.Properties getAttributes()
Returns all attributes as a Properties object.

Specified by:
getAttributes in interface IXMLElement
Returns:
the non-null set.

getAttributesInNamespace

public java.util.Properties getAttributesInNamespace(java.lang.String namespace)
Returns all attributes in a specific namespace as a Properties object.

Specified by:
getAttributesInNamespace in interface IXMLElement
Parameters:
namespace - the namespace URI of the attributes, which may be null.
Returns:
the non-null set.

getSystemID

public java.lang.String getSystemID()
Returns the system ID of the data where the element started.

Specified by:
getSystemID in interface IXMLElement
Returns:
the system ID, or null if unknown.
See Also:
getLineNr()

getLineNr

public int getLineNr()
Returns the line number in the data where the element started.

Specified by:
getLineNr in interface IXMLElement
Returns:
the line number, or NO_LINE if unknown.
See Also:
NO_LINE, getSystemID()

getContent

public java.lang.String getContent()
Return the #PCDATA content of the element. If the element has a combination of #PCDATA content and child iterator, the #PCDATA sections can be retrieved as unnamed child objects. In this case, this method returns null.

Specified by:
getContent in interface IXMLElement
Returns:
the content.

setContent

public void setContent(java.lang.String content)
Sets the #PCDATA content. It is an error to call this method with a non-null value if there are child objects.

Specified by:
setContent in interface IXMLElement
Parameters:
content - the (possibly null) content.

equals

public boolean equals(java.lang.Object rawElement)
Returns true if the element equals another element.

Specified by:
equals in interface IXMLElement
Overrides:
equals in class java.lang.Object
Parameters:
rawElement - the element to compare to

equalsXMLElement

public boolean equalsXMLElement(IXMLElement elt)
Returns true if the element equals another element.

Specified by:
equalsXMLElement in interface IXMLElement
Parameters:
elt - the element to compare to

toString

public java.lang.String toString()
Overrides:
toString in class java.lang.Object

dispose

public void dispose()
Gets rid of the XMLElement and of all its children.

Specified by:
dispose in interface IXMLElement

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