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/*
 * Copyright (c) CQSE GmbH
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package eu.cqse.check.framework.scanner;

import java.util.Objects;

/**
 * {@link ITokenMatcher} negating the result of another {@link ITokenMatcher}.
 */
/* package */ class NegatedTokenMatcher implements ITokenMatcher {

	private final ITokenMatcher original;

	public NegatedTokenMatcher(ITokenMatcher original) {
		this.original = Objects.requireNonNull(original, "original");
	}

	@Override
	public boolean matches(IToken token) {
		return !original.matches(token);
	}

	@Override
	public ITokenMatcher negated() {
		return original;
	}

	@Override
	public String humanReadable() {
		return "!" + original.humanReadable();
	}
}