org.haedus.io.ClassPathFileHandler.java Source code

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Here is the source code for org.haedus.io.ClassPathFileHandler.java

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/*******************************************************************************
 * Copyright (c) 2015. Samantha Fiona McCabe
 *
 * 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 org.haedus.io;

import org.apache.commons.io.IOUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.InputStreamSource;

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

/**
 * Author: Samantha Fiona Morrigan McCabe
 * Created: 10/11/2014
 */
public class ClassPathFileHandler implements FileHandler {

    private static final transient Logger LOGGER = LoggerFactory.getLogger(ClassPathFileHandler.class);

    private final String encoding;

    public ClassPathFileHandler(String encodingParam) {
        encoding = encodingParam;
    }

    public ClassPathFileHandler() {
        encoding = "UTF-8";
    }

    @Override
    public List<String> readLines(String path) {

        List<String> lines = new ArrayList<String>();

        InputStreamSource resource = new ClassPathResource(path);
        try {
            InputStream inputStream = resource.getInputStream();
            lines.addAll(IOUtils.readLines(inputStream, encoding));
            inputStream.close();
        } catch (IOException e) {
            LOGGER.error("Error when reading from path \"{}\"!", path);
        }
        return lines;
    }

    @Override
    public List<List<String>> readTable(String path) {
        List<List<String>> table = new ArrayList<List<String>>();

        for (String line : readLines(path)) {
            List<String> row = new ArrayList<String>();
            Collections.addAll(row, line.split("\t"));
            table.add(row);
        }
        return table;
    }

    @Override
    public void writeString(String path, String data) {
        throw new UnsupportedOperationException(
                "Trying to write using an instance of " + ClassPathFileHandler.class.getCanonicalName());
    }

    @Override
    public void writeLines(String path, List<String> data) {
        throw new UnsupportedOperationException(
                "Trying to write using an instance of " + ClassPathFileHandler.class.getCanonicalName());
    }
}