Examples of com.google.common.io.ByteSource

com.google.common.io.ByteSource
A readable source of bytes, such as a file. Unlike an {@link InputStream}, a {@code ByteSource} is not an open, stateful stream for input that can be read and closed.Instead, it is an immutable supplier of {@code InputStream} instances.
{@code ByteSource} provides two kinds of methods:
- Methods that return a stream: These methods should return a new, independent instance each time they are called. The caller is responsible for ensuring that the returned stream is closed.
- Convenience methods: These are implementations of common operations that are typically implemented by opening a stream using one of the methods in the first category, doing something and finally closing the stream that was opened.
@since 14.0 @author Colin Decker

                                            @Nonnull final ClientHttpRequestFactory clientHttpRequestFactory,
                                            @Nonnull final String styleString,
                                            @Nonnull final MapfishMapContext mapContext) throws Throwable {


        // try to load xml
        final ByteSource straightByteSource = ByteSource.wrap(styleString.getBytes(Constants.DEFAULT_CHARSET));
        final Optional<Style> styleOptional = tryLoadSLD(straightByteSource, null);


        if (styleOptional.isPresent()) {
            return styleOptional;
        }


        final Integer styleIndex = lookupStyleIndex(styleString).orNull();
        final String styleStringWithoutIndexReference = removeIndexReference(styleString);
        Function<byte[], Optional<Style>> loadFunction = new Function<byte[], Optional<Style>>() {
            @Override
            public Optional<Style> apply(final byte[] input) {
                final ByteSource bytes = ByteSource.wrap(input);
                try {
                    return tryLoadSLD(bytes, styleIndex);
                } catch (IOException e) {
                    throw ExceptionUtils.getRuntimeException(e);
                }

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    return this;
  }


  public FakeGFileBuilder contents(File file) {
    try {
      ByteSource byteSource = Files.asByteSource(file);
      this.contents = byteSource.openStream();
    } catch (IOException e) {
      Throwables.propagate(e);
    }


    return this;

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    public void mapping(final String context, final File file) {
        httpServer.createContext(context, new HttpHandler() {
            @Override
            public void handle(HttpExchange httpExchange) throws IOException {
                ByteSource byteSource = Files.asByteSource(file);
                httpExchange.sendResponseHeaders(200, byteSource.size());
                BufferedOutputStream os = new BufferedOutputStream(httpExchange.getResponseBody());
                os.write(byteSource.read());
                os.flush();
                os.close();
            }
        });
    }

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      assertPayloadEquals(request, "whoops", "application/unknown", false);
   }


   public void testPutPayloadEnclosingGenerateMD5() throws SecurityException, NoSuchMethodException, IOException {
      Invokable<?, ?> method = method(TestTransformers.class, "put", PayloadEnclosing.class);
      ByteSource byteSource = ByteSource.wrap("whoops".getBytes(UTF_8));
      PayloadEnclosing payloadEnclosing = new PayloadEnclosingImpl(Payloads.newByteSourcePayload(byteSource));
      payloadEnclosing.getPayload().getContentMetadata().setContentLength(byteSource.size());
      payloadEnclosing.getPayload().getContentMetadata().setContentMD5(byteSource.hash(Hashing.md5()).asBytes());


      GeneratedHttpRequest request = processor.apply(Invocation.create(method,
            ImmutableList.<Object> of(payloadEnclosing)));
      assertRequestLineEquals(request, "PUT http://localhost:9999 HTTP/1.1");
      assertNonPayloadHeadersEqual(request, "");

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   }


   public void testPutInputStreamPayloadEnclosingGenerateMD5() throws SecurityException, NoSuchMethodException,
         IOException {
      Invokable<?, ?> method = method(TestTransformers.class, "put", PayloadEnclosing.class);
      ByteSource byteSource = ByteSource.wrap("whoops".getBytes(UTF_8));
      PayloadEnclosing payloadEnclosing = new PayloadEnclosingImpl(
            newInputStreamPayload(byteSource.openStream()));
      payloadEnclosing.getPayload().getContentMetadata().setContentLength(byteSource.size());
      payloadEnclosing.getPayload().getContentMetadata().setContentMD5(byteSource.hash(Hashing.md5()).asBytes());


      GeneratedHttpRequest request = processor.apply(Invocation.create(method,
            ImmutableList.<Object> of(payloadEnclosing)));
      assertRequestLineEquals(request, "PUT http://localhost:9999 HTTP/1.1");
      assertNonPayloadHeadersEqual(request, "");

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      assertPayloadEquals(request, "whoops", "application/unknown", null, null, "en", false);
   }


   public void testPutPayloadWithGeneratedMD5AndNoContentType() throws SecurityException, NoSuchMethodException,
         IOException {
      ByteSource byteSource = ByteSource.wrap("whoops".getBytes(UTF_8));
      Payload payload = Payloads.newByteSourcePayload(byteSource);
      payload.getContentMetadata().setContentLength(byteSource.size());
      payload.getContentMetadata().setContentMD5(byteSource.hash(Hashing.md5()).asBytes());


      Invokable<?, ?> method = method(TestTransformers.class, "put", Payload.class);
      GeneratedHttpRequest request = processor.apply(Invocation.create(method,
            ImmutableList.<Object> of(payload)));
      assertRequestLineEquals(request, "PUT http://localhost:9999 HTTP/1.1");

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      assertPayloadEquals(request, "whoops", "application/unknown", false);
   }


   public void testPutInputStreamPayloadWithMD5() throws NoSuchAlgorithmException, IOException, SecurityException,
         NoSuchMethodException {
      ByteSource byteSource = ByteSource.wrap("whoops".getBytes(UTF_8));
      Payload payload = Payloads.newByteSourcePayload(byteSource);
      payload.getContentMetadata().setContentLength(byteSource.size());
      payload.getContentMetadata().setContentMD5(byteSource.hash(Hashing.md5()).asBytes());


      Invokable<?, ?> method = method(TestTransformers.class, "put", Payload.class);
      GeneratedHttpRequest request = processor.apply(Invocation.create(method,
            ImmutableList.<Object> of(payload)));
      assertRequestLineEquals(request, "PUT http://localhost:9999 HTTP/1.1");

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   @Override
   public Blob getBlob(final String container, final String key) {
      BlobBuilder builder = blobBuilders.get();
      builder.name(key);
      File file = getFileForBlobKey(container, key);
      ByteSource byteSource = Files.asByteSource(file);
      try {
         builder.payload(byteSource)
            .contentLength(byteSource.size())
            .contentMD5(byteSource.hash(Hashing.md5()).asBytes());
      } catch (IOException e) {
         logger.error("An error occurred calculating MD5 for blob %s from container ", key, container);
         Throwables.propagateIfPossible(e);
      }
      Blob blob = builder.build();

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        resultBlob = blobStore.getBlob(CONTAINER_NAME, blobKey, options);


        assertNotNull(resultBlob, "Blob exists");
        // checks file content
        ByteSource expectedFile = Files.asByteSource(new File(TARGET_CONTAINER_NAME, blobKey));
        assertEquals(expectedFile.read(), ByteStreams2.toByteArrayAndClose(resultBlob.getPayload().openStream()),
                "Blob payload differs from file content");
        // metadata are verified in the test for blobMetadata, so no need to
        // perform a complete test here
        assertNotNull(resultBlob.getMetadata(), "Metadata null");
        MutableBlobMetadata metadata = resultBlob.getMetadata();

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      // write files
      storageStrategy.putBlob(CONTAINER_NAME, blob);


      // verify that the files is equal
      File blobFullPath = new File(TARGET_CONTAINER_NAME, blobKey);
      ByteSource expectedInput = Files.asByteSource(sourceFile);
      ByteSource actualInput = Files.asByteSource(blobFullPath);
      assertTrue(expectedInput.contentEquals(actualInput),
            "Files are not equal");
   }

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