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SyntheticCompositeNode.java
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SyntheticCompositeNode.java
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/*******************************************************************************
* Copyright (c) 2010 itemis AG (http://www.itemis.eu) and others.
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* SPDX-License-Identifier: EPL-2.0
*******************************************************************************/
package org.eclipse.xtext.nodemodel.impl;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.xtext.nodemodel.BidiIterable;
import org.eclipse.xtext.nodemodel.BidiTreeIterable;
import org.eclipse.xtext.nodemodel.BidiTreeIterator;
import org.eclipse.xtext.nodemodel.ICompositeNode;
import org.eclipse.xtext.nodemodel.ILeafNode;
import org.eclipse.xtext.nodemodel.INode;
import org.eclipse.xtext.nodemodel.SyntaxErrorMessage;
import org.eclipse.xtext.nodemodel.util.EmptyBidiIterable;
import org.eclipse.xtext.nodemodel.util.NodeIterable;
import org.eclipse.xtext.nodemodel.util.NodeTreeIterator;
import org.eclipse.xtext.nodemodel.util.ReversedBidiTreeIterable;
import org.eclipse.xtext.nodemodel.util.SingletonBidiIterable;
import org.eclipse.xtext.util.ITextRegion;
import org.eclipse.xtext.util.ITextRegionWithLineInformation;
/**
* Unfolds the array of grammar elements that is associated with a composite node.
*
* @author Sebastian Zarnekow - Initial contribution and API
* @noextend This class is not intended to be subclassed by clients.
*/
public class SyntheticCompositeNode implements ICompositeNode, BidiTreeIterable<INode> {
private final CompositeNode delegate;
private final int grammarElementIdx;
/**
* @since 2.35
*/
public SyntheticCompositeNode(CompositeNode delegate, int grammarElementIdx) {
this.delegate = delegate;
this.grammarElementIdx = grammarElementIdx;
}
@Override
public ICompositeNode getParent() {
if (grammarElementIdx == 1)
return delegate;
return new SyntheticCompositeNode(delegate, grammarElementIdx - 1);
}
/**
* @since 2.35
*/
protected CompositeNode basicGetDelegate() {
return delegate;
}
/**
* @since 2.35
*/
protected int basicGetGrammarElementIndex() {
return grammarElementIdx;
}
@Override
public boolean hasSiblings() {
return false;
}
@Override
public boolean hasPreviousSibling() {
return false;
}
@Override
public boolean hasNextSibling() {
return false;
}
@Override
public INode getPreviousSibling() {
return null;
}
@Override
public INode getNextSibling() {
return null;
}
@Override
public ICompositeNode getRootNode() {
return delegate.getRootNode();
}
@Override
public int getTotalOffset() {
return delegate.getTotalOffset();
}
@Override
public int getOffset() {
return delegate.getOffset();
}
@Override
public int getLength() {
return delegate.getLength();
}
@Override
public int getTotalStartLine() {
return delegate.getTotalStartLine();
}
@Override
public int getEndLine() {
return delegate.getEndLine();
}
@Override
public int getStartLine() {
return delegate.getStartLine();
}
@Override
public int getTotalEndLine() {
return delegate.getTotalEndLine();
}
@Override
public int getTotalLength() {
return delegate.getTotalLength();
}
@Override
public int getTotalEndOffset() {
return delegate.getTotalEndOffset();
}
@Override
public String getText() {
return delegate.getText();
}
@Override
public EObject getGrammarElement() {
EObject[] array = (EObject[]) delegate.basicGetGrammarElement();
return array[grammarElementIdx];
}
@Override
public EObject getSemanticElement() {
return delegate.getSemanticElement();
}
@Override
public boolean hasDirectSemanticElement() {
return false;
}
@Override
public SyntaxErrorMessage getSyntaxErrorMessage() {
return null;
}
@Override
public BidiTreeIterable<INode> getAsTreeIterable() {
return this;
}
@Override
public BidiTreeIterator<INode> iterator() {
return new NodeTreeIterator(this);
}
@Override
public Iterable<ILeafNode> getLeafNodes() {
return delegate.getLeafNodes();
}
@Override
public BidiTreeIterable<INode> reverse() {
return new ReversedBidiTreeIterable<INode>(this);
}
@Override
public BidiIterable<INode> getChildren() {
if (hasChildren()) {
INode firstChild = getFirstChild();
if (firstChild.hasSiblings()) {
return new NodeIterable(firstChild);
} else {
return SingletonBidiIterable.<INode>create(firstChild);
}
}
return EmptyBidiIterable.instance();
}
@Override
public boolean hasChildren() {
EObject[] array = (EObject[]) delegate.basicGetGrammarElement();
if (array.length == grammarElementIdx + 1)
return delegate.basicGetFirstChild() != null;
return true;
}
@Override
public INode getFirstChild() {
EObject[] array = (EObject[]) delegate.basicGetGrammarElement();
if (array.length == grammarElementIdx + 1)
return delegate.basicGetFirstChild();
return new SyntheticCompositeNode(delegate, grammarElementIdx + 1);
}
@Override
public INode getLastChild() {
EObject[] array = (EObject[]) delegate.basicGetGrammarElement();
if (array.length == grammarElementIdx + 1)
return delegate.basicGetLastChild();
return new SyntheticCompositeNode(delegate, grammarElementIdx + 1);
}
@Override
public int getLookAhead() {
return delegate.getLookAhead();
}
@Override
public boolean equals(Object obj) {
if (obj == this)
return true;
if (!(obj instanceof SyntheticCompositeNode))
return false;
SyntheticCompositeNode casted = (SyntheticCompositeNode) obj;
return delegate == casted.delegate && grammarElementIdx == casted.grammarElementIdx;
}
@Override
public int hashCode() {
return delegate.hashCode() ^ grammarElementIdx;
}
/**
* @since 2.5
*/
@Override
public ITextRegion getTextRegion() {
return delegate.getTextRegion();
}
/**
* @since 2.5
*/
@Override
public ITextRegion getTotalTextRegion() {
return delegate.getTotalTextRegion();
}
/**
* @since 2.5
*/
@Override
public ITextRegionWithLineInformation getTextRegionWithLineInformation() {
return delegate.getTextRegionWithLineInformation();
}
/**
* @since 2.5
*/
@Override
public ITextRegionWithLineInformation getTotalTextRegionWithLineInformation() {
return delegate.getTotalTextRegionWithLineInformation();
}
/**
* @since 2.5
*/
@Override
public int getEndOffset() {
return delegate.getEndOffset();
}
}