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Spoon is a tool for meta-programming, analysis and transformation of Java programs.
/*
* SPDX-License-Identifier: (MIT OR CECILL-C)
*
* Copyright (C) 2006-2023 INRIA and contributors
*
* Spoon is available either under the terms of the MIT License (see LICENSE-MIT.txt) or the Cecill-C License (see LICENSE-CECILL-C.txt). You as the user are entitled to choose the terms under which to adopt Spoon.
*/
package spoon.pattern.internal.matcher;
import java.util.List;
import spoon.SpoonException;
import spoon.pattern.internal.node.RootNode;
/**
* Chain of {@link RootNode}s. {@link RootNode}s are processed in the same order as they were added into chain
*/
public class ChainOfMatchersImpl implements Matchers {
private final RootNode firstMatcher;
private final Matchers next;
/**
* @param items
* @param next
* @return new {@link ChainOfMatchersImpl} which starts with items nodes and continues with `next` {@link Matchers}
*/
public static Matchers create(List items, Matchers next) {
return createFromList(next, items, 0);
}
private static Matchers createFromList(Matchers next, List items, int idx) {
RootNode matcher;
while (true) {
if (idx >= items.size()) {
return next;
}
matcher = items.get(idx);
if (matcher != null) {
break;
}
idx++;
}
return new ChainOfMatchersImpl(matcher, createFromList(next, items, idx + 1));
}
private ChainOfMatchersImpl(RootNode firstMatcher, Matchers next) {
if (firstMatcher == null) {
throw new SpoonException("The firstMatcher Node MUST NOT be null");
}
this.firstMatcher = firstMatcher;
if (next == null) {
throw new SpoonException("The next Node MUST NOT be null");
}
this.next = next;
}
@Override
public TobeMatched matchAllWith(TobeMatched targets) {
return firstMatcher.matchTargets(targets, next);
}
}