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    1   /*
    2    * Copyright 2004-2009 the Seasar Foundation and the Others.
    3    *
    4    * Licensed under the Apache License, Version 2.0 (the "License");
    5    * you may not use this file except in compliance with the License.
    6    * You may obtain a copy of the License at
    7    *
    8    *     http://www.apache.org/licenses/LICENSE-2.0
    9    *
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
    13   * either express or implied. See the License for the specific language
    14   * governing permissions and limitations under the License.
    15   */
    16  package org.seasar.cubby.spi.impl;
    17
    18  import static org.seasar.cubby.internal.util.LogMessages.format;
    19
    20  import java.util.Collection;
    21  import java.util.Map;
    22
    23  import javax.servlet.http.HttpServletRequest;
    24
    25  import org.seasar.cubby.controller.RequestParser;
    26  import org.seasar.cubby.controller.impl.DefaultRequestParser;
    27  import org.seasar.cubby.spi.RequestParserProvider;
    28  import org.slf4j.Logger;
    29  import org.slf4j.LoggerFactory;
    30
    31  /**
    32   * {@link RequestParser} のプロバイダの抽象的な実装です。
    33   * <p>
    34   * このクラスのサブクラスは {{@link #getRequestParsers()} をオーバーライドして使用可能な要求解析機の一覧を返してください。
    35   * </p>
    36   *
    37   * @author baba
    38   */
    39  public abstract class AbstractRequestParserProvider implements
    40  		RequestParserProvider {
    41
    42  	/** ロガー。 */
    43  	private static final Logger logger = LoggerFactory
    44  			.getLogger(AbstractRequestParserProvider.class);
    45
    46  	/** デフォルトの {@link RequestParser} */
    47  	private final RequestParser defaultRequestParser = new DefaultRequestParser();
    48
    49  	/**
    50  	 * {@inheritDoc}
    51  	 */
    52  	public Map<String, Object[]> getParameterMap(
    53  			final HttpServletRequest request) {
    54  		final RequestParser requestParser = findRequestParser(request);
    55  		if (logger.isDebugEnabled()) {
    56  			logger.debug(format("DCUB0016", requestParser));
    57  		}
    58  		final Map<String, Object[]> parameterMap = requestParser
    59  				.getParameterMap(request);
    60  		return parameterMap;
    61  	}
    62
    63  	/**
    64  	 * 要求を解析できる {@link RequestParser} を検索します。
    65  	 *
    66  	 * @param request
    67  	 *            要求
    68  	 * @return 要求を解析できる {@link RequestParser}
    69  	 */
    70  	protected RequestParser findRequestParser(final HttpServletRequest request) {
    71  		for (final RequestParser requestParser : getRequestParsers()) {
    72  			if (requestParser.isParsable(request)) {
    73  				return requestParser;
    74  			}
    75  		}
    76  		return defaultRequestParser;
    77  	}
    78
    79  	/**
    80  	 * 要求解析機の一覧を取得します。
    81  	 *
    82  	 * @return 要求解析機の一覧
    83  	 */
    84  	protected abstract Collection<RequestParser> getRequestParsers();
    85
    86  }