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OrangeSignal CSV is a very flexible csv (comma-separated values) read and write library for Java.
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/*
 * Copyright 2013 the original author or authors.
 *
 * 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 com.orangesignal.csv.manager;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.util.List;
import java.util.zip.ZipFile;
import java.util.zip.ZipInputStream;

import com.orangesignal.csv.Csv;
import com.orangesignal.csv.CsvConfig;
import com.orangesignal.csv.LhaEntryFilter;
import com.orangesignal.csv.ZipEntryFilter;
import com.orangesignal.csv.bean.AbstractCsvBeanTemplate;
import com.orangesignal.csv.filters.BeanFilter;
import com.orangesignal.csv.handlers.AbstractBeanListHandler;
import com.orangesignal.csv.handlers.BeanOrder;
import com.orangesignal.jlha.LhaFile;
import com.orangesignal.jlha.LhaInputStream;

/**
 * 区切り文字形式データの統合入力インタフェースの実装を容易にするための抽象クラスを提供します。
 *
 * @author Koji Sugisawa
 * @since 1.2.1
 */
public abstract class AbstractCsvLoader, H extends AbstractBeanListHandler, L extends AbstractCsvLoader> implements CsvLoader {

	/**
	 * 区切り文字形式情報を保持します。
	 */
	private final CsvConfig cfg;

	/**
	 * データアクセスハンドラを保持します。
	 */
	private final H handler;

	/**
	 * コンストラクタです。
	 *
	 * @param cfg 区切り文字形式情報
	 * @param handler 区切り文字形式データリストのデータアクセスハンドラ
	 * @throws IllegalArgumentException {@code cfg} または {@code handler} が {@code null} の場合
	 * @since 1.3.0
	 */
	protected AbstractCsvLoader(final CsvConfig cfg, final H handler) {
		if (cfg == null) {
			throw new IllegalArgumentException("CsvConfig must not be null");
		}
		if (handler == null) {
			throw new IllegalArgumentException("CsvListHandler must not be null");
		}
		this.cfg = cfg;
		this.handler = handler;
	}

	/**
	 * 区切り文字形式データリストのデータアクセスハンドラを返します。
	 * 
	 * @return 区切り文字形式データリストのデータアクセスハンドラ
	 */
	protected H getCsvListHandler() { return handler; }

	@SuppressWarnings("unchecked")
	@Override
	public L filter(final BeanFilter filter) {
		getCsvListHandler().filter(filter);
		return (L) this;
	}

	@SuppressWarnings("unchecked")
	@Override
	public L order(final BeanOrder... orders) {
		getCsvListHandler().order(orders);
		return (L) this;
	}

	@SuppressWarnings("unchecked")
	@Override
	public L offset(final int offset) {
		getCsvListHandler().setOffset(offset);
		return (L) this;
	}

	@SuppressWarnings("unchecked")
	@Override
	public L limit(final int limit) {
		getCsvListHandler().setLimit(limit);
		return (L) this;
	}

	@Override
	public List from(final Reader reader) throws IOException {
		return Csv.load(reader, cfg, getCsvListHandler());
	}

	@Override
	public List from(final InputStream in, final String encoding) throws IOException {
		return Csv.load(in, encoding, cfg, getCsvListHandler());
	}

	@Override
	public List from(final InputStream in) throws IOException {
		return Csv.load(in, cfg, getCsvListHandler());
	}

	@Override
	public List from(final File file, final String encoding) throws IOException {
		return Csv.load(file, encoding, cfg, getCsvListHandler());
	}

	@Override
	public List from(final File file) throws IOException {
		return Csv.load(file, cfg, getCsvListHandler());
	}

	@Override
	public List from(final LhaInputStream in, final String encoding, final LhaEntryFilter filter) throws IOException {
		return Csv.load(in, encoding, cfg, getCsvListHandler(), filter);
	}

	@Override
	public List from(final LhaInputStream in, final String encoding) throws IOException {
		return Csv.load(in, encoding, cfg, getCsvListHandler());
	}

	@Override
	public List from(final LhaInputStream in, final LhaEntryFilter filter) throws IOException {
		return Csv.load(in, cfg, getCsvListHandler(), filter);
	}

	@Override
	public List from(final LhaInputStream in) throws IOException {
		return Csv.load(in, cfg, getCsvListHandler());
	}

	@Override
	public List from(final LhaFile lhaFile, final String encoding, final LhaEntryFilter filter) throws IOException {
		return Csv.load(lhaFile, encoding, cfg, getCsvListHandler(), filter);
	}

	@Override
	public List from(final LhaFile lhaFile, final String encoding) throws IOException {
		return Csv.load(lhaFile, encoding, cfg, getCsvListHandler());
	}

	@Override
	public List from(final LhaFile lhaFile, final LhaEntryFilter filter) throws IOException {
		return Csv.load(lhaFile, cfg, getCsvListHandler(), filter);
	}

	@Override
	public List from(final LhaFile lhaFile) throws IOException {
		return Csv.load(lhaFile, cfg, getCsvListHandler());
	}

	@Override
	public List from(final ZipInputStream in, final String encoding, final ZipEntryFilter filter) throws IOException {
		return Csv.load(in, encoding, cfg, getCsvListHandler(), filter);
	}

	@Override
	public List from(final ZipInputStream in, final String encoding) throws IOException {
		return Csv.load(in, encoding, cfg, getCsvListHandler());
	}

	@Override
	public List from(final ZipInputStream in, final ZipEntryFilter filter) throws IOException {
		return Csv.load(in, cfg, getCsvListHandler(), filter);
	}

	@Override
	public List from(final ZipInputStream in) throws IOException {
		return Csv.load(in, cfg, getCsvListHandler());
	}

	@Override
	public List from(final ZipFile zipFile, final String encoding, final ZipEntryFilter filter) throws IOException {
		return Csv.load(zipFile, encoding, cfg, getCsvListHandler(), filter);
	}

	@Override
	public List from(final ZipFile zipFile, final String encoding) throws IOException {
		return Csv.load(zipFile, encoding, cfg, getCsvListHandler());
	}

	@Override
	public List from(final ZipFile zipFile, final ZipEntryFilter filter) throws IOException {
		return Csv.load(zipFile, cfg, getCsvListHandler(), filter);
	}

	@Override
	public List from(final ZipFile zipFile) throws IOException {
		return Csv.load(zipFile, cfg, getCsvListHandler());
	}

}