Examples of com.google.common.io.Closer

com.google.common.io.Closer
oracle.com/javase/tutorial/essential/exceptions/tryResourceClose.html"> try-with-resources statement in JDK6-compatible code. Running on Java 7, code using this should be approximately equivalent in behavior to the same code written with try-with-resources. Running on Java 6, exceptions that cannot be thrown must be logged rather than being added to the thrown exception as a suppressed exception.
This class is intended to be used in the following pattern:
```
    {@code Closer closer = Closer.create();}try  InputStream in = closer.register(openInputStream()); OutputStream out = closer.register(openOutputStream()); // do stuff } catch (Throwable e) { // ensure that any checked exception types other than IOException that could be thrown are // provided here, e.g. throw closer.rethrow(e, CheckedException.class); throw closer.rethrow(e); } finally { closer.close(); }}
```
Note that this try-catch-finally block is not equivalent to a try-catch-finally block using try-with-resources. To get the equivalent of that, you must wrap the above code in another try block in order to catch any exception that may be thrown (including from the call to {@code close()}).
This pattern ensures the following:
- Each {@code Closeable} resource that is successfully registered will be closed later.
- If a {@code Throwable} is thrown in the try block, no exceptions that occur when attemptingto close resources will be thrown from the finally block. The throwable from the try block will be thrown.
- If no exceptions or errors were thrown in the try block, the first exception thrown by an attempt to close a resource will be thrown.
- Any exception caught when attempting to close a resource that is not thrown (because another exception is already being thrown) is suppressed.
An exception that is suppressed is not thrown. The method of suppression used depends on the version of Java the code is running on:
- Java 7+: Exceptions are suppressed by adding them to the exception that will be thrown using {@code Throwable.addSuppressed(Throwable)}.
- Java 6: Exceptions are suppressed by logging them instead.
@author Colin Decker @since 14.0


  /**
   * Create a temporary ANT file for executing JUnit4 ANT task.
   */
  private File createTemporaryAntFile(Document doc) throws IOException {
    Closer closer = Closer.create();
    try {
      File antFile = File.createTempFile("junit4-ant-", ".xml", dir);
      OutputStream os = closer.register(new FileOutputStream(antFile));
      XMLWriter xmlWriter = new XMLWriter(os, OutputFormat.createPrettyPrint());
      xmlWriter.write(doc);
      return antFile;
    } catch (Throwable t) {
      throw closer.rethrow(t);
    } finally {
      closer.close();
    }
  }

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  public PrivateKey getPrivateKey(String alias) {
    return privateKey;
  }


  private static KeyStore loadKeyStore(InputSupplier<InputStream> inputStreamSupplier) throws IOException {
    Closer closer = Closer.create();
    try {
      InputStream inputStream = closer.register(inputStreamSupplier.getInput());
      KeyStore keyStore = KeyStore.getInstance("JKS");
      keyStore.load(inputStream, KEYSTORE_PASSWORD);
      return keyStore;
    } catch (Throwable e) {
      throw closer.rethrow(e);
    } finally {
      closer.close();
    }
  }

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            if (sink == null) {
                throw new IOException("Cannot persist unbound object: " + object);
            }
        }


        Closer closer = Closer.create();
        try {
            OutputStream os = closer.register(sink.openBufferedStream());
            mapper.writeValue(os, object);
        } finally {
            closer.close();
        }
    }

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     * @param <V> the type of class
     * @return an object
     */
    public static <V> V read(ByteSource source, Class<V> cls, boolean returnNull) {
        V object;
        Closer closer = Closer.create();


        try {
            object = mapper.readValue(closer.register(source.openBufferedStream()), cls);
        } catch (IOException e) {
            if (!(e instanceof FileNotFoundException)) {
                log.log(Level.INFO, "Failed to load" + cls.getCanonicalName(), e);
            }


            if (returnNull) {
                return null;
            }


            try {
                object = cls.newInstance();
            } catch (InstantiationException e1) {
                throw new RuntimeException(
                        "Failed to construct object with no-arg constructor", e1);
            } catch (IllegalAccessException e1) {
                throw new RuntimeException(
                        "Failed to construct object with no-arg constructor", e1);
            }
        } finally {
            try {
                closer.close();
            } catch (IOException e) {
            }
        }


        return object;

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            throw new InterruptedException();
        }
    }


    public static Properties loadProperties(Class<?> clazz, String name, String extraProperty) throws IOException {
        Closer closer = Closer.create();
        Properties prop = new Properties();
        try {
            InputStream in = closer.register(clazz.getResourceAsStream(name));
            prop.load(in);
            String extraPath = System.getProperty(extraProperty);
            if (extraPath != null) {
                log.info("Loading extra properties for " +
                        clazz.getCanonicalName() + ":" + name + " from " + extraPath + "...");
                in = closer.register(new BufferedInputStream(closer.register(new FileInputStream(extraPath))));
                prop.load(in);
            }
        } finally {
            closer.close();
        }


        return prop;
    }

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        this.destination = destination;
    }


    @Override
    public void run() {
        Closer closer = Closer.create();


        try {
            InputStream is = closer.register(source.openBufferedStream());
            ZipInputStream zis = closer.register(new ZipInputStream(is));
            ZipEntry entry;


            destination.getParentFile().mkdirs();


            while ((entry = zis.getNextEntry()) != null) {
                if (matches(entry)) {
                    File file = new File(getDestination(), entry.getName());
                    writeEntry(zis, file);
                }
            }
        } catch (IOException e) {
            throw new RuntimeException(e);
        } finally {
            try {
                closer.close();
            } catch (IOException e) {
            }
        }
    }

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  public OPFData peek()
    throws InvalidVersionException,
    IOException
  {
    Closer closer = Closer.create();
    try
    {
      InputStream in = resourceProvider.getInputStream(path);
      if (in == null)
        throw new IOException("Couldn't find resource " + path);
      in = closer.register(resourceProvider.getInputStream(path));
      return peek(in);
    } catch (Throwable e)
    {
      throw closer.rethrow(e, InvalidVersionException.class);
    } finally
    {
      closer.close();
    }
  }

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    return table;
  }


  private boolean loadWorkspaceSettings() {
    boolean success;
    Closer closer = Closer.create();
    try {
      try {
        final FileInputStream loadSource = closer.register(new FileInputStream(WORKSPACE_XML_FILENAME));
        MainWindow.this.toolWindowManager.getPersistenceDelegate().merge(loadSource, MergePolicy.RESET);
        LOGGER.info("Successfull loaded workspace settings.");
        success = true;
      } catch (Throwable ex) {
        success = false;
        closer.rethrow(ex);
      } finally {
        closer.close();
      }
    } catch (IOException ex) {
      LOGGER.error("Exeption thrown while loading workspace settings.", ex);
      success = false;
    }

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    return success;
  }


  private boolean saveWorskapceSettings() {
    boolean success;
    Closer closer = Closer.create();
    try {
      try {
        final FileOutputStream saveDestination = closer.register(new FileOutputStream(WORKSPACE_XML_FILENAME));
        MainWindow.this.toolWindowManager.getPersistenceDelegate().save(saveDestination);
        LOGGER.info("Successfull saved workspace settings.");
        success = true;
      } catch (Throwable ex) {
        closer.rethrow(ex);
        success = false;
      } finally {
        closer.close();
      }
    } catch (IOException ex) {
      LOGGER.error("Exeption thrown while saving workspace settings.", ex);
      success = false;
    }

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  public void run() {
    try {
      LOG.info("Exec " + mCommand + " output to " + mFilePath);
      Process p = java.lang.Runtime.getRuntime().exec(mCommand);
      String line;
      Closer closer = Closer.create();
      try {
        BufferedReader bri =
            closer.register(new BufferedReader(new InputStreamReader(p.getInputStream())));
        BufferedReader bre =
            closer.register(new BufferedReader(new InputStreamReader(p.getErrorStream())));
        File file = new File(mFilePath);
        FileWriter fw = new FileWriter(file.getAbsoluteFile());
        BufferedWriter bw = closer.register(new BufferedWriter(fw));
        while ((line = bri.readLine()) != null) {
          bw.write(line + "\n");
        }
        while ((line = bre.readLine()) != null) {
          bw.write(line + "\n");
        }
        bw.flush();
      } finally {
        closer.close();
      }


      p.waitFor();
      LOG.info("Exec " + mCommand + " output to " + mFilePath + " done.");
    } catch (IOException e) {

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