/*******************************************************************************
* Copyright (c) 2014 Bruno Medeiros and other Contributors.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Bruno Medeiros - initial API and implementation
*******************************************************************************/
package melnorme.lang.tooling.ast.util;
import static melnorme.utilbox.core.Assert.AssertNamespace.assertNotNull;
import melnorme.lang.tooling.ast.ILanguageElement;
import melnorme.lang.tooling.symbols.INamedElement;
import melnorme.utilbox.core.CoreUtil;
public class NodeElementUtil {
public static boolean isContainedIn(ILanguageElement node, ILanguageElement container) {
while(node != null) {
if(node == container) {
return true;
}
node = node.getLexicalParent();
}
return false;
}
/** @return the innermost node in the parent chain of given node (inclusive), that is
* an instance of given klass. Null if not found. */
public static <T extends ILanguageElement> T getMatchingParent(ILanguageElement node, Class<T> klass) {
assertNotNull(klass);
while(true) {
if(node == null) {
return null;
}
if(klass.isInstance(node)) {
return CoreUtil.<T>blindCast(node);
}
node = node.getLexicalParent();
}
}
public static INamedElement getOuterNamedElement(ILanguageElement node) {
return getNearestNamedElement(node.getLexicalParent());
}
/** An optimized version of {@link #getMatchingParent(ILanguageElement, Class)}) for klass=INamedElement */
public static INamedElement getNearestNamedElement(ILanguageElement node) {
while(true) {
if(node == null) {
return null;
}
if (node instanceof INamedElement) {
return (INamedElement) node;
}
node = node.getLexicalParent();
}
}
}