Java Code Examples for java.io.StringWriter#getBuffer()

public static Map<String, String> jsonToMap(final String json) {
    try {
        final Map<String, Object> input = objectMapper.readValue(json,
                new TypeReference<HashMap<String, Object>>() {
                });
        final Map<String, String> output = new HashMap<>(input.size());
        final StringWriter writer = new StringWriter();
        final StringBuffer buf = writer.getBuffer();
        for (final Map.Entry<String, Object> entry : input.entrySet()) {
            try (final JsonGenerator gen = new JsonFactory(objectMapper).createGenerator(writer)) {
                gen.writeObject(entry.getValue());
            }
            output.put(entry.getKey(),  StringUtils.stripEnd(StringUtils.stripStart(buf.toString(), "\""),"\""));
            buf.setLength(0);
        }
        return output;
    } catch (IOException e) {
        Log.logError("JSON TO MAP :" + json + " 出现异常:{}", e);
        return null;
    }
}
 

/**
 * Test of main method, of class TestXMLStreamWriter.
 */
@Test
public void testWriteComment() {
    try {
        String xml = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><a:html href=\"http://java.sun.com\"><!--This is comment-->java.sun.com</a:html>";
        XMLOutputFactory f = XMLOutputFactory.newInstance();
        // f.setProperty(XMLOutputFactory.IS_REPAIRING_NAMESPACES,
        // Boolean.TRUE);
        StringWriter sw = new StringWriter();
        XMLStreamWriter writer = f.createXMLStreamWriter(sw);
        writer.writeStartDocument("UTF-8", "1.0");
        writer.writeStartElement("a", "html", "http://www.w3.org/TR/REC-html40");
        writer.writeAttribute("href", "http://java.sun.com");
        writer.writeComment("This is comment");
        writer.writeCharacters("java.sun.com");
        writer.writeEndElement();
        writer.writeEndDocument();
        writer.flush();
        sw.flush();
        StringBuffer sb = sw.getBuffer();
        System.out.println("sb:" + sb.toString());
        Assert.assertTrue(sb.toString().equals(xml));
    } catch (Exception ex) {
        Assert.fail("Exception: " + ex.getMessage());
    }
}
 

protected StringBuffer
encode(
	Map		map,
	boolean	simple )
{
	StringWriter	writer = new StringWriter(1024);

	setOutputWriter( writer );

	setGenericSimple( simple );

	writeGeneric( map );

	flushOutputStream();

	return( writer.getBuffer());
}
 

private Pair<Symbol.ClassSymbol, JCTree.JCCompilationUnit> getClassSymbolForProducedClass( String fqn, BasicJavacTask[] task )
{
  StringWriter errors = new StringWriter();

  // need javac with ManifoldJavaFileManager because the produced class must come from manifold
  task[0] = getJavacTask_ManFileMgr();

  Symbol.ClassSymbol e = IDynamicJdk.instance().getTypeElement( task[0].getContext(), null, fqn );

  if( e != null && e.getSimpleName().contentEquals( ManClassUtil.getShortClassName( fqn ) ) )
  {
    JavacTrees trees = JavacTrees.instance( task[0].getContext() );
    TreePath path = trees.getPath( e );
    if( path != null )
    {
      return new Pair<>( e, (JCTree.JCCompilationUnit)path.getCompilationUnit() );
    }
    else
    {
      // TreePath is only applicable to a source file;
      // if fqn is not a source file, there is no compilation unit available
      return new Pair<>( e, null );
    }
  }

  StringBuffer errorText = errors.getBuffer();
  if( errorText.length() > 0 )
  {
    throw new RuntimeException( "Compile errors:\n" + errorText );
  }

  return null;
}
 

/**
 * Dump the subtree starting from this inode.
 * @return a text representation of the tree.
 */
@VisibleForTesting
public final StringBuffer dumpTreeRecursively() {
  final StringWriter out = new StringWriter(); 
  dumpTreeRecursively(new PrintWriter(out, true), new StringBuilder(),
      Snapshot.CURRENT_STATE_ID);
  return out.getBuffer();
}
 

/**
 * Produce a string in double quotes with backslash sequences in all the
 * right places. A backslash will be inserted within </, producing <\/,
 * allowing JSON text to be delivered in HTML. In JSON text, a string
 * cannot contain a control character or an unescaped quote or backslash.
 * @param string A String
 * @return  A String correctly formatted for insertion in a JSON text.
 */
public static String quote(String string) {
    StringWriter sw = new StringWriter();
    synchronized (sw.getBuffer()) {
        try {
            return quote(string, sw).toString();
        } catch (IOException ignored) {
            // will never happen - we are writing to a string writer
            return "";
        }
    }
}
 

/**
 * Constructs an instance.
 *
 * @param out {@code non-null;} writer to send final output to
 * @param leftWidth {@code > 0;} width of the left column, in characters
 * @param rightWidth {@code > 0;} width of the right column, in characters
 * @param spacer {@code non-null;} spacer string to sit between the two columns
 */
public TwoColumnOutput(Writer out, int leftWidth, int rightWidth,
                       String spacer) {
    if (out == null) {
        throw new NullPointerException("out == null");
    }

    if (leftWidth < 1) {
        throw new IllegalArgumentException("leftWidth < 1");
    }

    if (rightWidth < 1) {
        throw new IllegalArgumentException("rightWidth < 1");
    }

    if (spacer == null) {
        throw new NullPointerException("spacer == null");
    }

    StringWriter leftWriter = new StringWriter(1000);
    StringWriter rightWriter = new StringWriter(1000);

    this.out = out;
    this.leftWidth = leftWidth;
    this.leftBuf = leftWriter.getBuffer();
    this.rightBuf = rightWriter.getBuffer();
    this.leftColumn = new IndentingWriter(leftWriter, leftWidth);
    this.rightColumn =
        new IndentingWriter(rightWriter, rightWidth, spacer);
}
 

/**
 * Constructs an instance.
 *
 * @param out {@code non-null;} writer to send final output to
 * @param leftWidth {@code > 0;} width of the left column, in characters
 * @param rightWidth {@code > 0;} width of the right column, in characters
 * @param spacer {@code non-null;} spacer string to sit between the two columns
 */
public TwoColumnOutput(Writer out, int leftWidth, int rightWidth,
                       String spacer) {
    if (out == null) {
        throw new NullPointerException("out == null");
    }

    if (leftWidth < 1) {
        throw new IllegalArgumentException("leftWidth < 1");
    }

    if (rightWidth < 1) {
        throw new IllegalArgumentException("rightWidth < 1");
    }

    if (spacer == null) {
        throw new NullPointerException("spacer == null");
    }

    StringWriter leftWriter = new StringWriter(1000);
    StringWriter rightWriter = new StringWriter(1000);

    this.out = out;
    this.leftWidth = leftWidth;
    this.leftBuf = leftWriter.getBuffer();
    this.rightBuf = rightWriter.getBuffer();
    this.leftColumn = new IndentingWriter(leftWriter, leftWidth);
    this.rightColumn =
        new IndentingWriter(rightWriter, rightWidth, spacer);
}
 

/**
 * Constructs an instance.
 *
 * @param out {@code non-null;} writer to send final output to
 * @param leftWidth {@code > 0;} width of the left column, in characters
 * @param rightWidth {@code > 0;} width of the right column, in characters
 * @param spacer {@code non-null;} spacer string to sit between the two columns
 */
public TwoColumnOutput(Writer out, int leftWidth, int rightWidth,
                       String spacer) {
    if (out == null) {
        throw new NullPointerException("out == null");
    }

    if (leftWidth < 1) {
        throw new IllegalArgumentException("leftWidth < 1");
    }

    if (rightWidth < 1) {
        throw new IllegalArgumentException("rightWidth < 1");
    }

    if (spacer == null) {
        throw new NullPointerException("spacer == null");
    }

    StringWriter leftWriter = new StringWriter(1000);
    StringWriter rightWriter = new StringWriter(1000);

    this.out = out;
    this.leftWidth = leftWidth;
    this.leftBuf = leftWriter.getBuffer();
    this.rightBuf = rightWriter.getBuffer();
    this.leftColumn = new IndentingWriter(leftWriter, leftWidth);
    this.rightColumn =
        new IndentingWriter(rightWriter, rightWidth, spacer);
}
 

/**
 * Constructs an instance.
 *
 * @param out {@code non-null;} writer to send final output to
 * @param leftWidth {@code > 0;} width of the left column, in characters
 * @param rightWidth {@code > 0;} width of the right column, in characters
 * @param spacer {@code non-null;} spacer string to sit between the two columns
 */
public TwoColumnOutput(Writer out, int leftWidth, int rightWidth,
                       String spacer) {
    if (out == null) {
        throw new NullPointerException("out == null");
    }

    if (leftWidth < 1) {
        throw new IllegalArgumentException("leftWidth < 1");
    }

    if (rightWidth < 1) {
        throw new IllegalArgumentException("rightWidth < 1");
    }

    if (spacer == null) {
        throw new NullPointerException("spacer == null");
    }

    StringWriter leftWriter = new StringWriter(1000);
    StringWriter rightWriter = new StringWriter(1000);

    this.out = out;
    this.leftWidth = leftWidth;
    this.leftBuf = leftWriter.getBuffer();
    this.rightBuf = rightWriter.getBuffer();
    this.leftColumn = new IndentingWriter(leftWriter, leftWidth);
    this.rightColumn =
        new IndentingWriter(rightWriter, rightWidth, spacer);
}
 

/**
 * Produce a string in double quotes with backslash sequences in all the
 * right places. A backslash will be inserted within </, producing
 * <\/, allowing JSON text to be delivered in HTML. In JSON text, a
 * string cannot contain a control character or an unescaped quote or
 * backslash.
 *
 * @param string
 *            A String
 * @return A String correctly formatted for insertion in a JSON text.
 */
public static String quote(String string) {
    StringWriter sw = new StringWriter();
    synchronized (sw.getBuffer()) {
        try {
            return quote(string, sw).toString();
        } catch (IOException ignored) {
            // will never happen - we are writing to a string writer
            return "";
        }
    }
}
 

/**
 * Produce a string in double quotes with backslash sequences in all the
 * right places. A backslash will be inserted within </, producing <\/,
 * allowing JSON text to be delivered in HTML. In JSON text, a string cannot
 * contain a control character or an unescaped quote or backslash.
 *
 * @param string
 *            A String
 * @return A String correctly formatted for insertion in a JSON text.
 */
public static String quote(String string) {
    StringWriter sw = new StringWriter();
    synchronized (sw.getBuffer()) {
        try {
            return quote(string, sw).toString();
        } catch (IOException ignored) {
            // will never happen - we are writing to a string writer
            return "";
        }
    }
}
 

/**
 * 记录完善的异常日志信息(包括堆栈信息)
 *
 * @param e
 *                Exception
 */
public static String recordStackTraceMsg(Exception e) {
	StringWriter stringWriter = new StringWriter();
	PrintWriter writer = new PrintWriter(stringWriter);
	e.printStackTrace(writer);
	StringBuffer buffer = stringWriter.getBuffer();
	return buffer.toString();
}
 

/**
 * Constructs an instance.
 *
 * @param out {@code non-null;} writer to send final output to
 * @param leftWidth {@code > 0;} width of the left column, in characters
 * @param rightWidth {@code > 0;} width of the right column, in characters
 * @param spacer {@code non-null;} spacer string to sit between the two columns
 */
public TwoColumnOutput(Writer out, int leftWidth, int rightWidth,
                       String spacer) {
    if (out == null) {
        throw new NullPointerException("out == null");
    }

    if (leftWidth < 1) {
        throw new IllegalArgumentException("leftWidth < 1");
    }

    if (rightWidth < 1) {
        throw new IllegalArgumentException("rightWidth < 1");
    }

    if (spacer == null) {
        throw new NullPointerException("spacer == null");
    }

    StringWriter leftWriter = new StringWriter(1000);
    StringWriter rightWriter = new StringWriter(1000);

    this.out = out;
    this.leftWidth = leftWidth;
    this.leftBuf = leftWriter.getBuffer();
    this.rightBuf = rightWriter.getBuffer();
    this.leftColumn = new IndentingWriter(leftWriter, leftWidth);
    this.rightColumn =
        new IndentingWriter(rightWriter, rightWidth, spacer);
}
 

/**
 * Constructs an instance.
 *
 * @param out {@code non-null;} writer to send final output to
 * @param leftWidth {@code > 0;} width of the left column, in characters
 * @param rightWidth {@code > 0;} width of the right column, in characters
 * @param spacer {@code non-null;} spacer string to sit between the two columns
 */
public TwoColumnOutput(Writer out, int leftWidth, int rightWidth,
                       String spacer) {
    if (out == null) {
        throw new NullPointerException("out == null");
    }

    if (leftWidth < 1) {
        throw new IllegalArgumentException("leftWidth < 1");
    }

    if (rightWidth < 1) {
        throw new IllegalArgumentException("rightWidth < 1");
    }

    if (spacer == null) {
        throw new NullPointerException("spacer == null");
    }

    StringWriter leftWriter = new StringWriter(1000);
    StringWriter rightWriter = new StringWriter(1000);

    this.out = out;
    this.leftWidth = leftWidth;
    this.leftBuf = leftWriter.getBuffer();
    this.rightBuf = rightWriter.getBuffer();
    this.leftColumn = new IndentingWriter(leftWriter, leftWidth);
    this.rightColumn =
        new IndentingWriter(rightWriter, rightWidth, spacer);
}
 

/**
 * 记录完善的异常日志信息(包括堆栈信息)
 *
 * @param e
 *                Exception
 */
public static String recordStackTraceMsg(Exception e) {
	StringWriter stringWriter = new StringWriter();
	PrintWriter writer = new PrintWriter(stringWriter);
	e.printStackTrace(writer);
	StringBuffer buffer = stringWriter.getBuffer();
	return buffer.toString();
}
 

private void handlePatchContents(HttpServletRequest request, BufferedReader requestReader, HttpServletResponse response, IFileStore file)
		throws IOException, CoreException, NoSuchAlgorithmException, JSONException, ServletException {
	JSONObject changes = OrionServlet.readJSONRequest(request);
	// read file to memory
	Reader fileReader = new InputStreamReader(file.openInputStream(EFS.NONE, null));
	StringWriter oldFile = new StringWriter();
	IOUtilities.pipe(fileReader, oldFile, true, false);
	StringBuffer oldContents = oldFile.getBuffer();
	// Remove the BOM character if it exists
	if (oldContents.length() > 0) {
		char firstChar = oldContents.charAt(0);
		if (firstChar == '\uFEFF' || firstChar == '\uFFFE') {
			oldContents.replace(0, 1, "");
		}
	}
	JSONArray changeList = changes.getJSONArray("diff");
	for (int i = 0; i < changeList.length(); i++) {
		JSONObject change = changeList.getJSONObject(i);
		long start = change.getLong("start");
		long end = change.getLong("end");
		String text = change.getString("text");
		oldContents.replace((int) start, (int) end, text);
	}

	String newContents = oldContents.toString();
	boolean failed = false;
	if (changes.has("contents")) {
		String contents = changes.getString("contents");
		if (!newContents.equals(contents)) {
			failed = true;
			newContents = contents;
		}
	}
	Writer fileWriter = new OutputStreamWriter(file.openOutputStream(EFS.NONE, null), "UTF-8");
	IOUtilities.pipe(new StringReader(newContents), fileWriter, false, true);
	if (failed) {
		statusHandler.handleRequest(request, response, new ServerStatus(IStatus.ERROR, HttpServletResponse.SC_NOT_ACCEPTABLE,
				"Bad File Diffs. Please paste this content in a bug report: \u00A0\u00A0 	" + changes.toString(), null));
		return;
	}

	// return metadata with the new Etag
	handleGetMetadata(request, response, file);
}
 

/**
 * Make a pretty-printed JSON text of this JSONArray.
 * 
 * <p>If <code>indentFactor > 0</code> and the {@link JSONArray} has only
 * one element, then the array will be output on a single line:
 * <pre>{@code [1]}</pre>
 * 
 * <p>If an array has 2 or more elements, then it will be output across
 * multiple lines: <pre>{@code
 * [
 * 1,
 * "value 2",
 * 3
 * ]
 * }</pre>
 * <p><b>
 * Warning: This method assumes that the data structure is acyclical.
 * </b>
 * 
 * @param indentFactor
 *            The number of spaces to add to each level of indentation.
 * @return a printable, displayable, transmittable representation of the
 *         object, beginning with <code>[</code>&nbsp;<small>(left
 *         bracket)</small> and ending with <code>]</code>
 *         &nbsp;<small>(right bracket)</small>.
 * @throws JSONException
 */
public String toString(int indentFactor) throws JSONException {
    StringWriter sw = new StringWriter();
    synchronized (sw.getBuffer()) {
        return this.write(sw, indentFactor, 0).toString();
    }
}
 

/**
 * Make a pretty-printed JSON text of this JSONArray.
 * 
 * <p>If <code>indentFactor > 0</code> and the {@link JSONArray} has only
 * one element, then the array will be output on a single line:
 * <pre>{@code [1]}</pre>
 * 
 * <p>If an array has 2 or more elements, then it will be output across
 * multiple lines: <pre>{@code
 * [
 * 1,
 * "value 2",
 * 3
 * ]
 * }</pre>
 * <p><b>
 * Warning: This method assumes that the data structure is acyclical.
 * </b>
 * 
 * @param indentFactor
 *            The number of spaces to add to each level of indentation.
 * @return a printable, displayable, transmittable representation of the
 *         object, beginning with <code>[</code>&nbsp;<small>(left
 *         bracket)</small> and ending with <code>]</code>
 *         &nbsp;<small>(right bracket)</small>.
 * @throws JSONException
 */
public String toString(int indentFactor) throws JSONException {
    StringWriter sw = new StringWriter();
    synchronized (sw.getBuffer()) {
        return this.write(sw, indentFactor, 0).toString();
    }
}
 

/**
 * Make a pretty-printed JSON text of this JSONObject.
 * 
 * <p>If <code>indentFactor > 0</code> and the {@link JSONObject}
 * has only one key, then the object will be output on a single line:
 * <pre>{@code {"key": 1}}</pre>
 * 
 * <p>If an object has 2 or more keys, then it will be output across
 * multiple lines: <code><pre>{
 *  "key1": 1,
 *  "key2": "value 2",
 *  "key3": 3
 * }</pre></code>
 * <p><b>
 * Warning: This method assumes that the data structure is acyclical.
 * </b>
 *
 * @param indentFactor
 *            The number of spaces to add to each level of indentation.
 * @return a printable, displayable, portable, transmittable representation
 *         of the object, beginning with <code>{</code>&nbsp;<small>(left
 *         brace)</small> and ending with <code>}</code>&nbsp;<small>(right
 *         brace)</small>.
 * @throws JSONException
 *             If the object contains an invalid number.
 */
public String toString(int indentFactor) throws JSONException {
    StringWriter w = new StringWriter();
    synchronized (w.getBuffer()) {
        return this.write(w, indentFactor, 0).toString();
    }
}