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Contains interfaces for the portal services. Interfaces are only loaded by the global class loader and are shared by all plugins.

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/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This library 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 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library 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.
 */

package com.liferay.portal.kernel.util;

import com.liferay.portal.kernel.concurrent.ConcurrentReferenceValueHashMap;
import com.liferay.portal.kernel.memory.FinalizeManager;

import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * @author Connor McKay
 * @author Brian Wing Shun Chan
 */
public class StringParserFragment {

	public static StringParserFragment create(String chunk) {
		StringParserFragment stringParserFragment = _stringParserFragments.get(
			chunk);

		if (stringParserFragment == null) {
			stringParserFragment = new StringParserFragment(chunk);

			_stringParserFragments.put(chunk, stringParserFragment);
		}

		return stringParserFragment;
	}

	public String getName() {
		return _name;
	}

	public String getPattern() {
		return _pattern.toString();
	}

	public String getToken() {
		return _token;
	}

	public boolean isRaw() {
		return _raw;
	}

	public boolean matches(String parameter) {
		Matcher matcher = _pattern.matcher(parameter);

		return matcher.matches();
	}

	protected StringParserFragment(String fragment) {
		if ((fragment == null) || (fragment.length() < 3)) {
			throw new IllegalArgumentException(
				"Fragment is invalid: " + fragment);
		}

		int index = fragment.indexOf(CharPool.COLON);

		String name = null;

		if (index < 0) {
			name = fragment.substring(1, fragment.length() - 1);

			_pattern = _defaultPattern;
		}
		else {
			name = fragment.substring(1, index);
			String pattern = fragment.substring(
				index + 1, fragment.length() - 1);

			if (Validator.isNull(pattern)) {
				throw new IllegalArgumentException(
					"Pattern is null: " + fragment);
			}

			_pattern = Pattern.compile(pattern);
		}

		if (name.isEmpty()) {
			throw new IllegalArgumentException("Name is null: " + fragment);
		}

		if (name.charAt(0) == CharPool.PERCENT) {
			name = name.substring(1);

			if (name.isEmpty()) {
				throw new IllegalArgumentException(
					"Name is invalid: " + fragment);
			}

			_raw = true;
		}
		else {
			_raw = false;
		}

		_name = name;

		_token = StringPool.OPEN_CURLY_BRACE.concat(_name).concat(
			StringPool.CLOSE_CURLY_BRACE);
	}

	private static final Pattern _defaultPattern = Pattern.compile("[^/\\.]+");
	private static final Map
		_stringParserFragments = new ConcurrentReferenceValueHashMap<>(
			FinalizeManager.SOFT_REFERENCE_FACTORY);

	private final String _name;
	private final Pattern _pattern;
	private final boolean _raw;
	private final String _token;

}