com.streamsets.pipeline.lib.parser.excel.WorkbookParserFactory.java Source code

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Here is the source code for com.streamsets.pipeline.lib.parser.excel.WorkbookParserFactory.java

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/*
 * Copyright 2018 StreamSets Inc.
 *
 * 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. See accompanying LICENSE file.
 */
package com.streamsets.pipeline.lib.parser.excel;

import com.streamsets.pipeline.config.ExcelHeader;
import com.streamsets.pipeline.lib.parser.DataParser;
import com.streamsets.pipeline.lib.parser.DataParserException;
import com.streamsets.pipeline.lib.parser.DataParserFactory;
import org.apache.poi.EncryptedDocumentException;
import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.usermodel.WorkbookFactory;
import org.jetbrains.annotations.NotNull;

import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
import java.util.Collections;
import java.util.Map;
import java.util.Set;

public class WorkbookParserFactory extends DataParserFactory {
    public static final Map<String, Object> CONFIGS;
    public static final Set<Class<? extends Enum>> MODES;

    static {
        CONFIGS = Collections.emptyMap();
        MODES = Collections.singleton(ExcelHeader.class);
    }

    public WorkbookParserFactory(Settings settings) {
        super(settings);
    }

    @Override
    public DataParser getParser(String id, InputStream is, String offset) throws DataParserException {
        return createParser(is, offset);
    }

    @NotNull
    private DataParser createParser(InputStream is, String offset) throws DataParserException {
        Workbook workbook = open(is);

        WorkbookParserSettings workbookSettings = WorkbookParserSettings.builder()
                .withHeader(getSettings().getMode(ExcelHeader.class)).build();
        return new WorkbookParser(workbookSettings, getSettings().getContext(), workbook, offset);
    }

    private Workbook open(InputStream is) throws DataParserException {
        try {
            return WorkbookFactory.create(is);
        } catch (IOException e) {
            throw new DataParserException(Errors.EXCEL_PARSER_01, e);
        } catch (InvalidFormatException e) {
            throw new DataParserException(Errors.EXCEL_PARSER_02, e);
        } catch (EncryptedDocumentException e) {
            throw new DataParserException(Errors.EXCEL_PARSER_03, e);
        }
    }

    @Override
    public DataParser getParser(String id, Reader reader, long offset) throws DataParserException {
        throw new DataParserException(Errors.EXCEL_PARSER_00);
    }
}