/*
 * Copyright 2010, 2011, 2012 mapsforge.org
 *
 * This program is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License as published by the Free Software
 * Foundation, either version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
 * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with
 * this program. If not, see <http://www.gnu.org/licenses/>.
 */
package org.oscim.theme;

import java.util.List;

import org.oscim.core.Tag;

class MultiKeyMatcher implements AttributeMatcher {
	private final String[] mKeys;

	MultiKeyMatcher(List<String> keys) {
		mKeys = new String[keys.size()];
		for (int i = 0, n = mKeys.length; i < n; ++i) {
			mKeys[i] = keys.get(i).intern();
		}
	}

	@Override
	public boolean isCoveredBy(AttributeMatcher attributeMatcher) {
		if (attributeMatcher == this) {
			return true;
		}

		Tag[] tags = new Tag[mKeys.length];
		int i = 0;
		for (String key : mKeys) {
			tags[i++] = new Tag(key, null);
		}
		return attributeMatcher.matches(tags);
	}

	@Override
	public boolean matches(Tag[] tags) {
		for (Tag tag : tags)
			for (String key : mKeys)
				if (key == tag.key)
					return true;

		return false;
	}
}