org.eclipse.xtext.nodemodel.impl

Class AbstractNode

java.lang.Object

org.eclipse.xtext.nodemodel.impl.AbstractNode

All Implemented Interfaces:

java.lang.Iterable<INode>, BidiIterable<INode>, BidiTreeIterable<INode>, INode

Direct Known Subclasses:

CompositeNode, LeafNode

public abstract class AbstractNode
extends java.lang.Object
implements INode, BidiTreeIterable<INode>

Author:

Sebastian Zarnekow - Initial contribution and API, Mark Christiaens - Serialization support

This class is not intended to be subclassed by clients.

This class is not intended to be subclassed by clients.

Constructor Summary

Constructors

Constructor and Description
AbstractNode()

Method Summary

Methods

Modifier and Type	Method and Description
protected java.lang.Object	basicGetGrammarElement()
protected int	basicGetLineOfOffset(INode rootNode, int offset)
protected AbstractNode	basicGetNextSibling()
protected CompositeNode	basicGetParent()
protected AbstractNode	basicGetPreviousSibling()
protected org.eclipse.emf.ecore.EObject	basicGetSemanticElement()
protected boolean	basicHasNextSibling()
protected boolean	basicHasPreviousSibling()
protected boolean	basicHasSiblings()
BidiTreeIterator<AbstractNode>	basicIterator()
protected void	basicSetGrammarElement(java.lang.Object grammarElementOrArray)
protected void	basicSetNextSibling(AbstractNode next)
protected void	basicSetParent(CompositeNode parent)
protected void	basicSetPreviousSibling(AbstractNode prev)
BidiTreeIterable<INode>	getAsTreeIterable() Returns a tree iterable that uses this node as its origin and root instance.
int	getEndLine() Returns the line number relative to the complete input where the node ends (one based, excluding hidden tokens).
org.eclipse.emf.ecore.EObject	getGrammarElement() Returns the grammar element that created this node.
java.lang.Iterable<ILeafNode>	getLeafNodes() Returns an iterable for all contained leaf nodes.
int	getLength() Returns the length of this node excluding hidden tokens.
INode	getNextSibling() Returns the next sibling or null.
int	getOffset() Returns the offset of this node excluding hidden tokens.
ICompositeNode	getParent() Returns the parent of the node or null if and only if this is the root node.
INode	getPreviousSibling() Returns the previous sibling or null.
ICompositeNode	getRootNode() Returns the root node of this parse tree.
org.eclipse.emf.ecore.EObject	getSemanticElement() Returns the nearest semantic object that is associated with the subtree of this node.
int	getStartLine() Returns the line number relative to the complete input where the node begins (one based, excluding hidden tokens).
SyntaxErrorMessage	getSyntaxErrorMessage() Returns the directly associated syntax error message or null if none.
java.lang.String	getText() Returns the parsed text that is covered by this node (including hidden tokens).
int	getTotalEndLine() Returns the line number relative to the complete input where the node ends (one based, including hidden tokens).
int	getTotalEndOffset() Returns the end offset (exclusive) of this node including hidden tokens.
int	getTotalStartLine() Returns the line number relative to the complete input where the node begins (one based, including hidden tokens).
boolean	hasDirectSemanticElement() Returns true if this node as a directly associated semantic element.
boolean	hasNextSibling() Returns true if this node is not the last child of its parent.
boolean	hasPreviousSibling() Returns true if this node is not the first child of its parent.
boolean	hasSiblings() Returns true if this node has any siblings.
BidiTreeIterator<INode>	iterator() Returns a tree iterator that can be used forwards and backwards.
BidiTreeIterable<INode>	reverse() Returns a reverse version of this iterable that can be used forwards and backwards.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eclipse.xtext.nodemodel.INode

getTotalLength, getTotalOffset

Constructor Detail

AbstractNode

public AbstractNode()

Method Detail

getParent

public ICompositeNode getParent()

Description copied from interface: INode

Returns the parent of the node or null if and only if this is the root node.

Specified by:

getParent in interface INode

Returns:

the parent of this node or null.

basicGetParent

protected CompositeNode basicGetParent()

basicSetParent

protected void basicSetParent(CompositeNode parent)

getAsTreeIterable

public BidiTreeIterable<INode> getAsTreeIterable()

Description copied from interface: INode

Returns a tree iterable that uses this node as its origin and root instance. Its iterator will not return any siblings of this root. However, the first element returned by BidiTreeIterator.previous() or BidiTreeIterator.next() will be this instance.

Specified by:

getAsTreeIterable in interface INode

Returns:

a tree iterable where this node represents the root instance.

iterator

public BidiTreeIterator<INode> iterator()

Description copied from interface: BidiTreeIterable

Returns a tree iterator that can be used forwards and backwards.

Specified by:

iterator in interface java.lang.Iterable<INode>

Specified by:

iterator in interface BidiIterable<INode>

Specified by:

iterator in interface BidiTreeIterable<INode>

Returns:

an iterator. Never returns null.

reverse

public BidiTreeIterable<INode> reverse()

Description copied from interface: BidiTreeIterable

Returns a reverse version of this iterable that can be used forwards and backwards. In other words, an iterator provided by the reverse iterable will delegate its hasNext() and next() invocations to BidiIterator.hasPrevious() and BidiIterator.previous() respectively.

This allows clients to iterate backwards by means of the enhanced for-loop:

 for(T t: iterable.reverse()) {
   // do something with t
 }
 

Specified by:

reverse in interface BidiIterable<INode>

Specified by:

reverse in interface BidiTreeIterable<INode>

Returns:

the reversed iterable. Never returns null.

getLeafNodes

public java.lang.Iterable<ILeafNode> getLeafNodes()

Description copied from interface: INode

Returns an iterable for all contained leaf nodes. Never null.

Specified by:

getLeafNodes in interface INode

Returns:

an iterable for all contained leaf nodes. Never null.

basicIterator

public BidiTreeIterator<AbstractNode> basicIterator()

getText

public java.lang.String getText()

Description copied from interface: INode

Returns the parsed text that is covered by this node (including hidden tokens). The result is never null but may be empty.

Specified by:

getText in interface INode

Returns:

the parsed text that is covered by this node (including hidden tokens). Never null.

getTotalStartLine

public int getTotalStartLine()

Description copied from interface: INode

Returns the line number relative to the complete input where the node begins (one based, including hidden tokens).

Specified by:

getTotalStartLine in interface INode

Returns:

the line number relative to the complete input where the node begins.

basicGetLineOfOffset

protected int basicGetLineOfOffset(INode rootNode,
                       int offset)

Since:

2.0

getStartLine

public int getStartLine()

Description copied from interface: INode

Returns the line number relative to the complete input where the node begins (one based, excluding hidden tokens).

Specified by:

getStartLine in interface INode

Returns:

the line number relative to the complete input where the node begins.

getEndLine

public int getEndLine()

Description copied from interface: INode

Returns the line number relative to the complete input where the node ends (one based, excluding hidden tokens).

Specified by:

getEndLine in interface INode

Returns:

the line number relative to the complete input where the node ends.

getTotalEndLine

public int getTotalEndLine()

Description copied from interface: INode

Returns the line number relative to the complete input where the node ends (one based, including hidden tokens).

Specified by:

getTotalEndLine in interface INode

Returns:

the line number relative to the complete input where the node ends.

getOffset

public int getOffset()

Description copied from interface: INode

Returns the offset of this node excluding hidden tokens. If this node is a hidden leaf node or a composite node that does only contain hidden leaf nodes, the total offset is returned.

Specified by:

getOffset in interface INode

Returns:

the offset of this node excluding hidden tokens.

getLength

public int getLength()

Description copied from interface: INode

Returns the length of this node excluding hidden tokens. If this node is a hidden leaf node, the total length is returned.

Specified by:

getLength in interface INode

Returns:

the length of this node excluding hidden tokens.

getTotalEndOffset

public int getTotalEndOffset()

Description copied from interface: INode

Returns the end offset (exclusive) of this node including hidden tokens. Yields the same result as offset + length but may be more efficient.

Specified by:

getTotalEndOffset in interface INode

Returns:

the end offset (exclusive) of this node including hidden tokens.

getRootNode

public ICompositeNode getRootNode()

Description copied from interface: INode

Returns the root node of this parse tree. Will not return null in a consistent tree.

Specified by:

getRootNode in interface INode

Returns:

the root node of this parse tree. Will not return null in a consistent tree.

getSemanticElement

public org.eclipse.emf.ecore.EObject getSemanticElement()

Description copied from interface: INode

Returns the nearest semantic object that is associated with the subtree of this node. May return null whenever the parser refused to create any objects due to unrecoverable errors. Implementations will usually walk up the node tree to find the semantic object. As the node model structure does not reflect the containment structure of the semantic object graph, clients should usually use the utilities in NodeModelUtils to obtain the semantic instance.

Specified by:

getSemanticElement in interface INode

Returns:

the nearest semantic object that is associated with the subtree of this node. May return null.

See Also:

INode.hasDirectSemanticElement(), NodeModelUtils.findActualSemanticObjectFor(INode)

basicGetSemanticElement

protected org.eclipse.emf.ecore.EObject basicGetSemanticElement()

hasDirectSemanticElement

public boolean hasDirectSemanticElement()

Description copied from interface: INode

Returns true if this node as a directly associated semantic element.

Specified by:

hasDirectSemanticElement in interface INode

Returns:

true if this node as a directly associated semantic element.

See Also:

INode.getSemanticElement()

getGrammarElement

public org.eclipse.emf.ecore.EObject getGrammarElement()

Description copied from interface: INode

Returns the grammar element that created this node. May return null in case of unrecoverable syntax errors. This happens usually when a keyword occurred at an unexpected offset.

Specified by:

getGrammarElement in interface INode

Returns:

the grammar element that created this node. May return null.

basicGetGrammarElement

protected java.lang.Object basicGetGrammarElement()

basicSetGrammarElement

protected void basicSetGrammarElement(java.lang.Object grammarElementOrArray)

getSyntaxErrorMessage

public SyntaxErrorMessage getSyntaxErrorMessage()

Description copied from interface: INode

Returns the directly associated syntax error message or null if none.

Specified by:

getSyntaxErrorMessage in interface INode

Returns:

the directly associated syntax error message. May return null.

getPreviousSibling

public INode getPreviousSibling()

Description copied from interface: INode

Returns the previous sibling or null. The result has the same parent as this node if it is not null.

Specified by:

getPreviousSibling in interface INode

Returns:

the previous sibling or null.

See Also:

INode.hasPreviousSibling(), INode.hasSiblings()

basicGetPreviousSibling

protected AbstractNode basicGetPreviousSibling()

basicSetPreviousSibling

protected void basicSetPreviousSibling(AbstractNode prev)

getNextSibling

public INode getNextSibling()

Description copied from interface: INode

Returns the next sibling or null. The result has the same parent as this node if it is not null.

Specified by:

getNextSibling in interface INode

Returns:

the next sibling or null.

See Also:

INode.hasNextSibling(), INode.hasSiblings()

basicGetNextSibling

protected AbstractNode basicGetNextSibling()

basicSetNextSibling

protected void basicSetNextSibling(AbstractNode next)

hasPreviousSibling

public boolean hasPreviousSibling()

Description copied from interface: INode

Returns true if this node is not the first child of its parent.

Specified by:

hasPreviousSibling in interface INode

Returns:

true if this node has a previous sibling thus INode.getPreviousSibling() will not return null.

basicHasPreviousSibling

protected boolean basicHasPreviousSibling()

hasNextSibling

public boolean hasNextSibling()

Description copied from interface: INode

Returns true if this node is not the last child of its parent.

Specified by:

hasNextSibling in interface INode

Returns:

true if this node has a next sibling thus INode.getNextSibling() will not return null.

basicHasNextSibling

protected boolean basicHasNextSibling()

hasSiblings

public boolean hasSiblings()

Description copied from interface: INode

Returns true if this node has any siblings.

Specified by:

hasSiblings in interface INode

Returns:

true if this node has any siblings.

See Also:

INode.hasPreviousSibling(), INode.hasNextSibling()

basicHasSiblings

protected boolean basicHasSiblings()