Example usage for com.google.common.io Closeables close

Introduction

In this page you can find the example usage for com.google.common.io Closeables close.

Prototype

public static void close(@Nullable Closeable closeable, boolean swallowIOException) throws IOException 

Source Link

Document

Closes a Closeable , with control over whether an IOException may be thrown.

Usage

From source file:org.apache.mahout.cf.taste.impl.similarity.precompute.FileSimilarItemsWriter.java

@Override
public void close() throws IOException {
    Closeables.close(writer, false);
}

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From source file:com.msiiplab.recsys.rwr.GroupLensDataModel.java

private static File convertGLFile(File originalFile) throws IOException {
    // Now translate the file; remove commas, then convert "::" delimiter to
    // comma//from  w  w w . j a  v  a  2  s  .  c  om
    File resultFile = new File(new File(System.getProperty("java.io.tmpdir")), "ratings.txt");
    if (resultFile.exists()) {
        resultFile.delete();
    }
    Writer writer = null;
    try {
        writer = new OutputStreamWriter(new FileOutputStream(resultFile), Charsets.UTF_8);
        for (String line : new FileLineIterable(originalFile, false)) {
            int lastDelimiterStart = line.lastIndexOf(COLON_DELIMTER);
            if (lastDelimiterStart < 0) {
                writer.close();
                throw new IOException("Unexpected input format on line: " + line);
            }
            String subLine = line.substring(0, lastDelimiterStart);
            String convertedLine = COLON_DELIMITER_PATTERN.matcher(subLine).replaceAll(",");
            writer.write(convertedLine);
            writer.write('\n');
        }
    } catch (IOException ioe) {
        resultFile.delete();
        throw ioe;
    } finally {
        Closeables.close(writer, false);
    }
    return resultFile;
}

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From source file:org.apache.druid.java.util.common.io.smoosh.SmooshedFileMapper.java

public static SmooshedFileMapper load(File baseDir) throws IOException {
    File metaFile = FileSmoosher.metaFile(baseDir);

    BufferedReader in = null;/*  w  w w  . j  a va2 s  .com*/
    try {
        in = new BufferedReader(new InputStreamReader(new FileInputStream(metaFile), StandardCharsets.UTF_8));

        String line = in.readLine();
        if (line == null) {
            throw new ISE("First line should be version,maxChunkSize,numChunks, got null.");
        }

        String[] splits = line.split(",");
        if (!"v1".equals(splits[0])) {
            throw new ISE("Unknown version[%s], v1 is all I know.", splits[0]);
        }
        if (splits.length != 3) {
            throw new ISE("Wrong number of splits[%d] in line[%s]", splits.length, line);
        }
        final Integer numFiles = Integer.valueOf(splits[2]);
        List<File> outFiles = Lists.newArrayListWithExpectedSize(numFiles);

        for (int i = 0; i < numFiles; ++i) {
            outFiles.add(FileSmoosher.makeChunkFile(baseDir, i));
        }

        Map<String, Metadata> internalFiles = Maps.newTreeMap();
        while ((line = in.readLine()) != null) {
            splits = line.split(",");

            if (splits.length != 4) {
                throw new ISE("Wrong number of splits[%d] in line[%s]", splits.length, line);
            }
            internalFiles.put(splits[0], new Metadata(Integer.parseInt(splits[1]), Integer.parseInt(splits[2]),
                    Integer.parseInt(splits[3])));
        }

        return new SmooshedFileMapper(outFiles, internalFiles);
    } finally {
        Closeables.close(in, false);
    }
}

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From source file:de.tuberlin.dima.cuttlefish.preprocessing.parsing.NewsItemExtractor.java

public void extract(NewsItemProcessor processor) throws Exception {
    for (File directory : directories) {
        for (File zipFile : directory.listFiles(ZIP_FILES)) {
            log.info("Parsing news in {}", zipFile.getName());
            ZipFile newsArchive = new ZipFile(zipFile);
            Enumeration<? extends ZipEntry> entries = newsArchive.entries();
            while (entries.hasMoreElements()) {
                InputStream newsItemAsXml = null;
                try {
                    newsItemAsXml = newsArchive.getInputStream(entries.nextElement());
                    NewsItem newsItem = NewsItemXmlParser.toNewsItem(newsItemAsXml);

                    processor.process(newsItem);

                } finally {
                    Closeables.close(newsItemAsXml, true);
                }/*from www .  ja va  2s . c om*/
            }
        }
    }
}

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From source file:org.robotbrains.data.cloud.timeseries.server.logging.Log4jLoggingProvider.java

/**
 * Start the logging provider.//from  ww w  .j av a2  s.  co m
 */
public void startup() {
    InputStream configurationStream = null;
    try {
        ConfigurationSource source;
        if (configurationFilePath != null) {
            File configurationFile = new File(configurationFilePath);
            configurationStream = new FileInputStream(configurationFile);
            source = new ConfigurationSource(configurationStream, configurationFile);
        } else {
            configurationStream = getClass().getClassLoader().getResourceAsStream("log4j.xml");
            source = new ConfigurationSource(configurationStream);
        }
        Configurator.initialize(null, source);
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } finally {
        try {
            Closeables.close(configurationStream, true);
        } catch (IOException e) {
            // Won't happen
        }
    }
}

---

From source file:org.apache.mahout.utils.vectors.arff.ARFFIterator.java

@Override
protected Vector computeNext() {
    String line;/*from   www .j  av  a  2s.  com*/
    try {
        while ((line = reader.readLine()) != null) {
            line = line.trim();
            if (!line.isEmpty() && !line.startsWith(ARFFModel.ARFF_COMMENT)) {
                break;
            }
        }
    } catch (IOException ioe) {
        throw new IllegalStateException(ioe);
    }
    if (line == null) {
        try {
            Closeables.close(reader, true);
        } catch (IOException e) {
            throw new IllegalStateException(e);
        }
        return endOfData();
    }
    Vector result;
    Matcher contents = DATA_PATTERN.matcher(line);
    if (contents.find()) {
        line = contents.group(1);
        String[] splits = splitCSV(line);
        result = new RandomAccessSparseVector(model.getLabelSize());
        for (String split : splits) {
            int idIndex = split.indexOf(' ');
            int idx = Integer.parseInt(split.substring(0, idIndex).trim());
            String data = split.substring(idIndex).trim();
            if (!"?".equals(data)) {
                result.setQuick(idx, model.getValue(data, idx));
            }
        }
    } else {
        result = new DenseVector(model.getLabelSize());
        String[] splits = splitCSV(line);
        for (int i = 0; i < splits.length; i++) {
            String split = splits[i];
            split = split.trim();
            if (WORDS_WITHOUT_SPARSE.matcher(split).matches() && !"?".equals(split)) {
                result.setQuick(i, model.getValue(split, i));
            }
        }
    }
    return result;
}

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From source file:com.android.ide.common.resources.ValidatingResourceParser.java

/**
 * Parse the given input and return false if it contains errors, <b>or</b> if
 * the context is already tagged as needing a full aapt run.
 *
 * @param path the full OS path to the file being parsed
 * @param input the input stream of the XML to be parsed (will be closed by this method)
 * @return true if parsing succeeds and false if it fails
 * @throws IOException if reading the contents fails
 *///from w  ww.jav a  2s .  c o m
public boolean parse(final String path, InputStream input) throws IOException {
    // No need to validate framework files
    if (mIsFramework) {
        try {
            Closeables.close(input, true /* swallowIOException */);
        } catch (IOException e) {
            // cannot happen
        }
        return true;
    }
    if (mContext.needsFullAapt()) {
        try {
            Closeables.close(input, true /* swallowIOException */);
        } catch (IOException e) {
            // cannot happen
        }
        return false;
    }

    KXmlParser parser = new KXmlParser();
    try {
        parser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES, true);

        if (input instanceof FileInputStream) {
            input = new BufferedInputStream(input);
        }
        parser.setInput(input, SdkConstants.UTF_8);

        return parse(path, parser);
    } catch (XmlPullParserException e) {
        String message = e.getMessage();

        // Strip off position description
        int index = message.indexOf("(position:"); //$NON-NLS-1$ (Hardcoded in KXml)
        if (index != -1) {
            message = message.substring(0, index);
        }

        String error = String.format("%1$s:%2$d: Error: %3$s", //$NON-NLS-1$
                path, parser.getLineNumber(), message);
        mContext.addError(error);
        return false;
    } catch (RuntimeException e) {
        // Some exceptions are thrown by the KXmlParser that are not XmlPullParserExceptions,
        // such as this one:
        //    java.lang.RuntimeException: Undefined Prefix: w in org.kxml2.io.KXmlParser@...
        //        at org.kxml2.io.KXmlParser.adjustNsp(Unknown Source)
        //        at org.kxml2.io.KXmlParser.parseStartTag(Unknown Source)
        String message = e.getMessage();
        String error = String.format("%1$s:%2$d: Error: %3$s", //$NON-NLS-1$
                path, parser.getLineNumber(), message);
        mContext.addError(error);
        return false;
    } finally {
        try {
            Closeables.close(input, true /* swallowIOException */);
        } catch (IOException e) {
            // cannot happen
        }
    }
}

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From source file:org.n52.sos.coding.json.JSONUtils.java

public static String print(final JsonNode node) {
    final StringWriter writer = new StringWriter();
    try {//from ww w  . jav  a  2s.  c  o m
        print(writer, node);
        writer.flush();
    } catch (IOException e) {
        // cannot happen
    } finally {
        try {
            Closeables.close(writer, true);
        } catch (IOException ioe) {
            LOGGER.error("Error while colsing closeable!", ioe);
        }
    }
    return writer.toString();
}

---

From source file:org.apache.mahout.utils.regex.AnalyzerTransformer.java

@Override
public String transformMatch(String match) {
    StringBuilder result = new StringBuilder();
    TokenStream ts = null;//  ww w .  jav  a  2 s.  c o m
    try {
        ts = analyzer.tokenStream(fieldName, new StringReader(match));
        ts.addAttribute(CharTermAttribute.class);
        ts.reset();
        TokenStreamIterator iter = new TokenStreamIterator(ts);
        while (iter.hasNext()) {
            result.append(iter.next()).append(' ');
        }
        ts.end();
    } catch (IOException e) {
        throw new IllegalStateException(e);
    } finally {
        try {
            Closeables.close(ts, true);
        } catch (IOException e) {
            log.error(e.getMessage(), e);
        }
    }
    return result.toString();
}

---

From source file:org.apache.mahout.cf.taste.impl.recommender.svd.FilePersistenceStrategy.java

@Override
public Factorization load() throws IOException {
    if (!file.exists()) {
        log.info("{} does not yet exist, no factorization found", file.getAbsolutePath());
        return null;
    }//from w ww .j  a v a2s  . c o m
    DataInputStream in = null;
    try {
        log.info("Reading factorization from {}...", file.getAbsolutePath());
        in = new DataInputStream(new BufferedInputStream(new FileInputStream(file)));
        return readBinary(in);
    } finally {
        Closeables.close(in, true);
    }
}

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