org.antlr.v4.runtime.tree.xpath.XPathWildcardAnywhereElement Maven / Gradle / Ivy

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With inspiration from other libraries

There is a newer version: 2.12.15

/*
 * Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
 * Use of this file is governed by the BSD 3-clause license that
 * can be found in the LICENSE.txt file in the project root.
 */

package org.antlr.v4.runtime.tree.xpath;

import org.antlr.v4.runtime.tree.ParseTree;
import org.antlr.v4.runtime.tree.Trees;

import java.util.ArrayList;
import java.util.Collection;

public class XPathWildcardAnywhereElement extends XPathElement {
	public XPathWildcardAnywhereElement() {
		super(XPath.WILDCARD);
	}

	@Override
	public Collection evaluate(ParseTree t) {
		if ( invert ) return new ArrayList(); // !* is weird but valid (empty)
		return Trees.getDescendants(t);
	}
}