com.floragunn.searchguard.test.helper.file.FileHelper.java Source code

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Here is the source code for com.floragunn.searchguard.test.helper.file.FileHelper.java

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/*
 * Copyright 2016 by floragunn UG (haftungsbeschrnkt) - All rights reserved
 * 
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed here is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * 
 * This software is free of charge for non-commercial and academic use. 
 * For commercial use in a production environment you have to obtain a license 
 * from https://floragunn.com
 * 
 */

package com.floragunn.searchguard.test.helper.file;

import java.io.File;
import java.io.IOException;
import java.io.Reader;
import java.io.StringReader;
import java.io.StringWriter;
import java.io.UnsupportedEncodingException;
import java.net.URL;
import java.net.URLDecoder;
import java.nio.charset.StandardCharsets;

import org.apache.commons.io.IOUtils;
import org.elasticsearch.common.bytes.BytesReference;
import org.elasticsearch.common.logging.ESLogger;
import org.elasticsearch.common.logging.Loggers;
import org.elasticsearch.common.xcontent.XContentBuilder;
import org.elasticsearch.common.xcontent.XContentFactory;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.common.xcontent.XContentType;

import com.floragunn.searchguard.test.AbstractSGUnitTest;
import com.floragunn.searchguard.test.helper.content.ContentHelper;

public class FileHelper {

    protected final static ESLogger log = Loggers.getLogger(FileHelper.class);

    public static File getAbsoluteFilePathFromClassPath(final String fileNameFromClasspath) {
        File file = null;
        final URL fileUrl = AbstractSGUnitTest.class.getClassLoader().getResource(fileNameFromClasspath);
        if (fileUrl != null) {
            try {
                file = new File(URLDecoder.decode(fileUrl.getFile(), "UTF-8"));
            } catch (final UnsupportedEncodingException e) {
                return null;
            }

            if (file.exists() && file.canRead()) {
                return file;
            } else {
                log.error("Cannot read from {}, maybe the file does not exists? ", file.getAbsolutePath());
            }

        } else {
            log.error("Failed to load " + fileNameFromClasspath);
        }
        return null;
    }

    public static final String loadFile(final String file) throws IOException {
        final StringWriter sw = new StringWriter();
        IOUtils.copy(FileHelper.class.getResourceAsStream("/" + file), sw, StandardCharsets.UTF_8);
        return sw.toString();
    }

    public static XContentBuilder readYamlContent(final String file) {
        try {
            return ContentHelper.readXContent(new StringReader(loadFile(file)), XContentType.YAML);
        } catch (IOException e) {
            return null;
        }
    }

}