Example usage for java.io Reader read

Introduction

In this page you can find the example usage for java.io Reader read.

Prototype

public int read(char cbuf[]) throws IOException 

Source Link

Document

Reads characters into an array.

Usage

From source file:com.cloudera.sqoop.io.TestLobFile.java

/** Verifies that the next record in the LobFile is the expected one. */
private void verifyNextRecord(LobFile.Reader reader, long expectedId, String expectedRecord) throws Exception {
    assertTrue(reader.next());/*from  w w  w  . j a  v a  2 s  .  c  o  m*/
    assertTrue(reader.isRecordAvailable());
    assertEquals(expectedId, reader.getRecordId());

    Reader r = reader.readClobRecord();
    CharBuffer buf = CharBuffer.allocate(expectedRecord.length());
    int bytesRead = 0;
    while (bytesRead < expectedRecord.length()) {
        int thisRead = r.read(buf);
        if (-1 == thisRead) {
            break;
        }

        bytesRead += thisRead;
    }

    LOG.info("Got record of " + bytesRead + " chars");
    assertEquals(expectedRecord.length(), bytesRead);

    char[] charData = buf.array();
    String finalRecord = new String(charData);
    assertEquals(expectedRecord, finalRecord);
}

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From source file:net.sf.jasperreports.engine.JRResultSetDataSource.java

protected String clobToString(Clob clob) throws JRException {
    try {// www.ja  v a  2  s  . c om
        int bufSize = 8192;
        char[] buf = new char[bufSize];

        Reader reader = new BufferedReader(clob.getCharacterStream(), bufSize);
        StringBuilder str = new StringBuilder((int) clob.length());

        for (int read = reader.read(buf); read > 0; read = reader.read(buf)) {
            str.append(buf, 0, read);
        }

        return str.toString();
    } catch (SQLException e) {
        throw new JRException(EXCEPTION_MESSAGE_KEY_RESULT_SET_CLOB_VALUE_READ_FAILURE, null, e);
    } catch (IOException e) {
        throw new JRException(EXCEPTION_MESSAGE_KEY_RESULT_SET_CLOB_VALUE_READ_FAILURE, null, e);
    }
}

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From source file:JavaViewer.java

void open(String name) {
    final String textString;

    if ((name == null) || (name.length() == 0))
        return;//from w  w w .j a  v a 2 s. c  o  m

    File file = new File(name);
    if (!file.exists()) {
        String message = "Err file no exist";
        displayError(message);
        return;
    }

    try {
        FileInputStream stream = new FileInputStream(file.getPath());
        try {
            Reader in = new BufferedReader(new InputStreamReader(stream));
            char[] readBuffer = new char[2048];
            StringBuffer buffer = new StringBuffer((int) file.length());
            int n;
            while ((n = in.read(readBuffer)) > 0) {
                buffer.append(readBuffer, 0, n);
            }
            textString = buffer.toString();
            stream.close();
        } catch (IOException e) {
            // Err_file_io
            String message = "Err_file_io";
            displayError(message);
            return;
        }
    } catch (FileNotFoundException e) {
        String message = "Err_not_found";
        displayError(message);
        return;
    }
    // Guard against superfluous mouse move events -- defer action until
    // later
    Display display = text.getDisplay();
    display.asyncExec(new Runnable() {
        public void run() {
            text.setText(textString);
        }
    });

    // parse the block comments up front since block comments can go across
    // lines - inefficient way of doing this
    lineStyler.parseBlockComments(textString);
}

---

From source file:com.xebialabs.overthere.cifs.winrm.WinRmClient.java

/**
 * Handle the httpResponse and return the SOAP XML String.
 *///from   w  w  w .  ja  v a 2 s. com
protected String handleResponse(final HttpResponse response, final HttpContext context) throws IOException {
    final HttpEntity entity = response.getEntity();
    if (null == entity.getContentType()
            || !entity.getContentType().getValue().startsWith("application/soap+xml")) {
        throw new WinRmRuntimeIOException("Error when sending request to " + targetURL
                + "; Unexpected content-type: " + entity.getContentType());
    }

    final InputStream is = entity.getContent();
    final Writer writer = new StringWriter();
    final Reader reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
    try {
        int n;
        final char[] buffer = new char[1024];
        while ((n = reader.read(buffer)) != -1) {
            writer.write(buffer, 0, n);
        }
    } finally {
        closeQuietly(reader);
        closeQuietly(is);
        consume(response.getEntity());
    }

    return writer.toString();
}

---

From source file:io.sqp.client.impl.SqpConnectionImpl.java

CompletableFuture<Void> send(Reader reader) {
    int bufSize = Math.min(MAX_MSG_BUFFER_SIZE, _session.getMaxTextMessageBufferSize());
    return CompletableFuture.runAsync(() -> {
        char[] buffer = new char[bufSize];
        int bytesRead;
        try (Writer output = _endpoint.getSendWriter()) {
            while ((bytesRead = reader.read(buffer)) > 0) {
                output.write(buffer, 0, bytesRead);
            }//from   www.  j  av a 2s.  c  om
        } catch (IOException e) {
            throw new CompletionException(new SqpIOException(e));
        }
    }, _sendingService).exceptionally(new FailHandler(this));
}

---

From source file:nl.sogeti.android.gpstracker.actions.ShareTrack.java

public String convertStreamToString(InputStream is) throws IOException {
    /*//from www .j  a  v a  2s  .c  o m
     * To convert the InputStream to String we use the Reader.read(char[] buffer) method. We iterate until the Reader return -1 which means there's no more data to read. We use the StringWriter
     * class to produce the string.
     */
    if (is != null) {
        Writer writer = new StringWriter();

        char[] buffer = new char[1024];
        try {
            Reader reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
            int n;
            while ((n = reader.read(buffer)) != -1) {
                writer.write(buffer, 0, n);
            }
        } finally {
            is.close();
        }
        return writer.toString();
    } else {
        return "";
    }
}

---

From source file:org.zilverline.extractors.AbstractExtractor.java

/**
 * This method extracts all relevant info of the file as an ParsedFileInfo object. Uses getContent as callback.
 * /*from w  w  w.j av  a  2  s  . c  om*/
 * @param f the File to extract content from
 * 
 * @return ParsedFileInfo the object containing relevant info of the provided file
 */
public final ParsedFileInfo extractInfo(final File f) {
    if (f == null) {
        log.warn("Something went terribly wrong, file = null, returning null ");
        return null;
    }
    try {
        setFile(f);

        Reader reader = getContent(f);
        fileInfo.setReader(reader);
        // get the summary from the reader
        if (reader != null) {
            String summary = fileInfo.getSummary();

            if (!StringUtils.hasText(summary)) {
                char[] sumChars = new char[SUMMARY_SIZE];
                int numChars = 0;
                try {
                    if (reader.markSupported()) {
                        reader.mark(SUMMARY_SIZE);
                        numChars = reader.read(sumChars);
                        reader.reset();
                    }
                    if (numChars > 0) {
                        summary = new String(sumChars, 0, numChars);
                    }
                    if (log.isDebugEnabled()) {
                        log.debug("Summary extracted from reader: " + summary);
                    }
                    setSummary(getSummaryFromContent(summary));
                } catch (IOException e) {
                    log.warn("Error extracting summary form reader", e);
                }
            }
        }
        // Set the title if there's none yet
        if (!StringUtils.hasLength(fileInfo.getTitle())) {
            fileInfo.setTitle(FileUtils.getBasename(f));
        }
    } catch (Exception e) {
        // here we don't throw any, since we do not want to interrupt the indexing process
        log.warn("Unexpected Error extracting content from  " + f.getName(), e);
    } catch (OutOfMemoryError e) {
        // this happens with very, very large Documents
        log.error("Very Serious Error. Out of Memory for very large documents: " + f.getName()
                + ", try increasing your JVM heap  size: for example, start your server with option '-Xmx128m'."
                + " Skipping file.", e);
    } catch (Throwable e) {
        log.error("Very Serious Error while extracting contents from: " + f.getName(), e);
    }

    return fileInfo;
}

---

From source file:com.cloudera.sqoop.io.TestLobFile.java

private void verifyClobFile(Path p, String... expectedRecords) throws Exception {

    LobFile.Reader reader = LobFile.open(p, conf);

    int recNum = 0;

    while (reader.next()) {
        // We should have a record of the same length as the expected one.
        String expected = expectedRecords[recNum];
        assertTrue(reader.isRecordAvailable());
        assertEquals(expected.length(), reader.getRecordLen());
        Reader r = reader.readClobRecord();

        // Read in the record and assert that we got enough characters out.
        CharBuffer buf = CharBuffer.allocate(expected.length());
        int bytesRead = 0;
        while (bytesRead < expected.length()) {
            int thisRead = r.read(buf);
            LOG.info("performed read of " + thisRead + " chars");
            if (-1 == thisRead) {
                break;
            }//w ww  . j  a  va2s. com

            bytesRead += thisRead;
        }

        LOG.info("Got record of " + bytesRead + " chars");
        assertEquals(expected.length(), bytesRead);
        char[] charData = buf.array();
        String finalRecord = new String(charData);
        assertEquals(expected, finalRecord);

        recNum++;
    }

    // Check that we got everything.
    assertEquals(expectedRecords.length, recNum);

    reader.close();

    try {
        reader.next();
        fail("Expected IOException calling next after close");
    } catch (IOException ioe) {
        // expected this.
    }

    // A second close shouldn't hurt anything. This should be a no-op.
    reader.close();
}

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From source file:org.syncope.core.workflow.ActivitiUserWorkflowAdapter.java

@Override
public WorkflowDefinitionTO getDefinition() throws WorkflowException {

    ProcessDefinition procDef;//from  ww  w  .  jav a2  s  . c o  m
    try {
        procDef = repositoryService.createProcessDefinitionQuery()
                .processDefinitionKey(ActivitiUserWorkflowAdapter.WF_PROCESS_ID).latestVersion().singleResult();
    } catch (ActivitiException e) {
        throw new WorkflowException(e);
    }

    InputStream procDefIS = repositoryService.getResourceAsStream(procDef.getDeploymentId(),
            WF_PROCESS_RESOURCE);
    Reader reader = null;
    Writer writer = new StringWriter();
    try {
        reader = new BufferedReader(new InputStreamReader(procDefIS));

        int n;
        char[] buffer = new char[1024];
        while ((n = reader.read(buffer)) != -1) {
            writer.write(buffer, 0, n);
        }
    } catch (IOException e) {
        LOG.error("While reading workflow definition {}", procDef.getKey(), e);
    } finally {
        try {
            if (reader != null) {
                reader.close();
            }
            if (procDefIS != null) {
                procDefIS.close();
            }
        } catch (IOException ioe) {
            LOG.error("While closing input stream for {}", procDef.getKey(), ioe);
        }
    }

    WorkflowDefinitionTO definitionTO = new WorkflowDefinitionTO();
    definitionTO.setId(ActivitiUserWorkflowAdapter.WF_PROCESS_ID);
    definitionTO.setXmlDefinition(writer.toString());

    return definitionTO;
}

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