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Meja spreadsheet library - generic implementation

There is a newer version: 6.2.1

/*
 * Copyright 2015 Axel Howind ([email protected]).
 *
 * 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.dua3.meja.model.generic;

import java.io.IOException;
import java.net.URI;

import com.dua3.meja.io.CsvWorkbookReader;
import com.dua3.meja.io.WorkbookReader;
import com.dua3.meja.model.WorkbookFactory;
import com.dua3.meja.model.generic.io.FileTypeCsv;
import com.dua3.utility.io.FileType;
import com.dua3.utility.io.OpenMode;
import com.dua3.utility.options.Arguments;
import com.dua3.utility.lang.LangUtil;

/**
 * A Factory for creating instances of {@link GenericWorkbook}.
 */
public class GenericWorkbookFactory extends WorkbookFactory {

    private static final GenericWorkbookFactory INSTANCE = new GenericWorkbookFactory();

    /**
     * Get instance of factory.
     * @return factory instance
     */
    public static GenericWorkbookFactory instance() {
        return INSTANCE;
    }

    /**
     * Constructor.
     */
    public GenericWorkbookFactory() {
        // force initialization of FileType instances
        //noinspection ResultOfMethodCallIgnored
        FileTypeCsv.instance();
    }

    @Override
    public GenericWorkbook create() {
        return new GenericWorkbook(null);
    }

    @Override
    public GenericWorkbook createStreaming() {
        return create();
    }

    @Override
    public GenericWorkbook open(URI uri, Arguments importSettings) throws IOException {
        FileType type = FileType.forUri(uri).orElseThrow(() -> new IllegalArgumentException("cannot determine filetype"));

        LangUtil.check(type.isSupported(OpenMode.READ), "Reading is not supported for files of type '%s'.",
                type.getName());

        WorkbookReader reader = CsvWorkbookReader.create();
        reader.setOptions(importSettings);

        return reader.read(instance(), uri);
    }

}