com.strobel.decompiler.patterns.OptionalNode Maven / Gradle / Ivy
/*
* OptionalNode.java
*
* Copyright (c) 2013 Mike Strobel
*
* This source code is based on Mono.Cecil from Jb Evain, Copyright (c) Jb Evain;
* and ILSpy/ICSharpCode from SharpDevelop, Copyright (c) AlphaSierraPapa.
*
* This source code is subject to terms and conditions of the Apache License, Version 2.0.
* A copy of the license can be found in the License.html file at the root of this distribution.
* By using this source code in any fashion, you are agreeing to be bound by the terms of the
* Apache License, Version 2.0.
*
* You must not remove this notice, or any other, from this software.
*/
package com.strobel.decompiler.patterns;
import com.strobel.core.VerifyArgument;
public final class OptionalNode extends Pattern {
private final INode _node;
public OptionalNode(final INode node) {
_node = VerifyArgument.notNull(node, "node");
}
public final INode getNode() {
return _node;
}
@Override
public final boolean matchesCollection(
final Role role,
final INode position,
final Match match,
final BacktrackingInfo backtrackingInfo) {
backtrackingInfo.stack.push(new PossibleMatch(position, match.getCheckPoint()));
return _node.matches(position, match);
}
@Override
public final boolean matches(final INode other, final Match match) {
return other == null || other.isNull() || _node.matches(other, match);
}
}