Eclipse JDT
2.1

org.eclipse.jdt.core.jdom
Interface IDOMNode

All Superinterfaces:
Cloneable
All Known Subinterfaces:
IDOMCompilationUnit, IDOMField, IDOMImport, IDOMInitializer, IDOMMember, IDOMMethod, IDOMPackage, IDOMType

public interface IDOMNode
extends Cloneable

Nodes represent structural fragments of a Java source file, also known as document fragments. Their implementation is known as a DOM (Document Object Model) - in this case a JDOM (Java DOM). A root node (node with no parent or siblings) represents the root of a document fragment (DF). A complete Java document is represented by a compilation unit node (IDOMCompilationUnit). In this way, a DF is comprised of DFs, and a document itself (compilation unit) is also a DF.

A DF may be created empty and programmatically filled, or it may be created from a source code string. The IDOMFactory allows the creation of all kinds of nodes from source code strings. Manipulations performed on a DF are immediately reflected in the DF's contents.

Children fragments are represented as a linked list of nodes. Children are inserted via their parent node, and are automatically linked up with previous and next nodes.

The contents of any node (DF) may be retrieved at any time. In this way it is possible to retrieve source code representing fragments of the compilation unit (for example, a type or a method), since the contents of any node (not just the root node) may be obtained.

The following manipulations on DFs are distinct:

Wherever types are specified in DOM APIs, type names must be specified as they would appear in source code. The DOM does not have a notion of type signatures, only raw text. Example type names are "Object", "java.io.File", and "int[]".

This interface is not intended to be implemented by clients.


Field Summary
static int COMPILATION_UNIT
          Node type constant indicating a compilation unit.
static int FIELD
          Node type constant indicating a field declaration.
static int IMPORT
          Node type constant indicating an import declaration.
static int INITIALIZER
          Node type constant indicating an initializer declaration.
static int METHOD
          Node type constant indicating a method (or constructor) declaration.
static int PACKAGE
          Node type constant indicating a package declaration.
static int TYPE
          Node type constant indicating a type declaration.
 
Method Summary
 void addChild(IDOMNode child)
          Adds the given un-parented node (document fragment) as the last child of this node.
 boolean canHaveChildren()
          Returns whether this node is allowed to have children.
 Object clone()
          Returns a stand-alone copy of the document fragment represented by this node that is in no way dependent on the document this node is part of.
 char[] getCharacters()
          Returns the current contents of this document fragment as a character array.
 IDOMNode getChild(String name)
          Returns the first named child of this node with the given name.
 Enumeration getChildren()
          Returns an enumeration of children of this node.
 String getContents()
          Returns the current contents of this document fragment.
 IDOMNode getFirstChild()
          Returns the first child of this node.
 IJavaElement getJavaElement(IJavaElement parent)
          Returns a handle for the Java element associated with this document fragment, based on the parent Java element.
 String getName()
          Returns the name of this node.
 IDOMNode getNextNode()
          Returns the sibling node immediately following this node.
 int getNodeType()
          Returns the type of this node.
 IDOMNode getParent()
          Returns the parent of this node.
 IDOMNode getPreviousNode()
          Returns the sibling node immediately preceding this node.
 void insertSibling(IDOMNode sibling)
          Inserts the given un-parented node as a sibling of this node, immediately before this node.
 boolean isAllowableChild(IDOMNode node)
          Returns whether the given node is an allowable child for this node.
 boolean isSignatureEqual(IDOMNode node)
          Returns whether this node's signature is equivalent to the given node's signature.
 void remove()
          Separates this node from its parent and siblings, maintaining any ties that this node has to the underlying document fragment.
 void setName(String name)
          Sets the name of this node.
 

Field Detail

COMPILATION_UNIT

public static final int COMPILATION_UNIT
Node type constant indicating a compilation unit. Nodes of this type maybe by safely cast to IDOMCompilationUnit.
See Also:
getNodeType()

PACKAGE

public static final int PACKAGE
Node type constant indicating a package declaration. Nodes of this type maybe by safely cast to IDOMPackage.
See Also:
getNodeType()

IMPORT

public static final int IMPORT
Node type constant indicating an import declaration. Nodes of this type maybe by safely cast to IDOMImport.
See Also:
getNodeType()

TYPE

public static final int TYPE
Node type constant indicating a type declaration. Nodes of this type maybe by safely cast to IDOMType.
See Also:
getNodeType()

FIELD

public static final int FIELD
Node type constant indicating a field declaration. Nodes of this type maybe by safely cast to IDOMField.
See Also:
getNodeType()

METHOD

public static final int METHOD
Node type constant indicating a method (or constructor) declaration. Nodes of this type maybe by safely cast to IDOMMethod.
See Also:
getNodeType()

INITIALIZER

public static final int INITIALIZER
Node type constant indicating an initializer declaration. Nodes of this type maybe by safely cast to IDOMInitializer.
See Also:
getNodeType()
Method Detail

addChild

public void addChild(IDOMNode child)
              throws DOMException,
                     IllegalArgumentException
Adds the given un-parented node (document fragment) as the last child of this node.
Parameters:
child - the new child node
Throws:
DOMException - if any of the following conditions hold:
  • this node is not allowed to have children,
  • the child is not of an allowable type
  • the child already has a parent
  • the child is an ancestor of this node
IllegalArgumentException - if the child is null
See Also:
insertSibling(org.eclipse.jdt.core.jdom.IDOMNode), remove()

canHaveChildren

public boolean canHaveChildren()
Returns whether this node is allowed to have children.
Returns:
true if this node can have children

clone

public Object clone()
Returns a stand-alone copy of the document fragment represented by this node that is in no way dependent on the document this node is part of.
Overrides:
clone in class Object
Returns:
a copy of type IDOMNode
See Also:
addChild(org.eclipse.jdt.core.jdom.IDOMNode), insertSibling(org.eclipse.jdt.core.jdom.IDOMNode), remove()

getCharacters

public char[] getCharacters()
Returns the current contents of this document fragment as a character array.

Note: To obtain complete source for the ".java" file, ask a compilation unit node for its contents.

Returns:
the contents, or null if this node has no contents

getChild

public IDOMNode getChild(String name)
Returns the first named child of this node with the given name.
Parameters:
name - the name
Returns:
the child node, or null if no such child exists

getChildren

public Enumeration getChildren()
Returns an enumeration of children of this node. Returns an empty enumeration if this node has no children (including nodes that cannot have children). Children appear in the order in which they are declared in the source code.
Returns:
an enumeration of the children

getContents

public String getContents()
Returns the current contents of this document fragment.

Note: To obtain complete source for the ".java" file, ask a compilation unit node for its contents.

Returns:
the contents, or null if this node has no contents

getFirstChild

public IDOMNode getFirstChild()
Returns the first child of this node. Children appear in the order in which they exist in the source code.
Returns:
the first child, or null if this node has no children
See Also:
getChildren()

getJavaElement

public IJavaElement getJavaElement(IJavaElement parent)
                            throws IllegalArgumentException
Returns a handle for the Java element associated with this document fragment, based on the parent Java element.
Parameters:
parent - the parent Java element
Throws:
IllegalArgumentException - if the parent element is not of a valid parent type for this node

getName

public String getName()
Returns the name of this node. More details are provided in each of the subtypes.
Returns:
the name, or null if it has no name

getNextNode

public IDOMNode getNextNode()
Returns the sibling node immediately following this node.
Returns:
the next node, or null if there is no following node

getNodeType

public int getNodeType()
Returns the type of this node.
Returns:
one of the node type constants defined in IDOMNode

getParent

public IDOMNode getParent()
Returns the parent of this node.
Returns:
the parent node, or null if this node does not have a parent

getPreviousNode

public IDOMNode getPreviousNode()
Returns the sibling node immediately preceding this node.
Returns:
the previous node, or null if there is no preceding node

insertSibling

public void insertSibling(IDOMNode sibling)
                   throws DOMException,
                          IllegalArgumentException
Inserts the given un-parented node as a sibling of this node, immediately before this node.
Parameters:
sibling - the new sibling node
Throws:
DOMException - if any of the following conditions hold:
  • this node is a document fragment root
  • the sibling is not of the correct type
  • the sibling already has a parent
  • this sibling is an ancestor of this node
IllegalArgumentException - if the sibling is null
See Also:
addChild(org.eclipse.jdt.core.jdom.IDOMNode), clone(), remove()

isAllowableChild

public boolean isAllowableChild(IDOMNode node)
Returns whether the given node is an allowable child for this node.
Parameters:
node - the potential child node
Returns:
true if the given node is an allowable child

isSignatureEqual

public boolean isSignatureEqual(IDOMNode node)
Returns whether this node's signature is equivalent to the given node's signature. In other words, if the nodes were siblings, would the declarations collide because they represent the same declaration.
Parameters:
node - the other node
Returns:
true if the nodes have equivalent signatures

remove

public void remove()
Separates this node from its parent and siblings, maintaining any ties that this node has to the underlying document fragment. A document fragment that is removed from its host document may still be dependent on that host document until it is inserted into a different document. Removing a root node has no effect.
See Also:
addChild(org.eclipse.jdt.core.jdom.IDOMNode), clone(), insertSibling(org.eclipse.jdt.core.jdom.IDOMNode)

setName

public void setName(String name)
Sets the name of this node. Name format depends on node type. More details are provided in each of the subtypes.
Parameters:
name - the name, or null to clear the name

Eclipse JDT
2.1

Copyright (c) IBM Corp. and others 2000, 2003. All Rights Reserved.