Example usage for java.util Stack peek

Introduction

In this page you can find the example usage for java.util Stack peek.

Prototype

public synchronized E peek() 

Source Link

Document

Looks at the object at the top of this stack without removing it from the stack.

Usage

From source file:com.google.dart.compiler.metrics.Tracer.java

public void addDataImpl(String... data) {
    Stack<TraceEvent> threadPendingEvents = pendingEvents.get();
    if (threadPendingEvents.isEmpty()) {
        throw new IllegalStateException("Tried to add data to an event that never started!");
    }//from  w w  w. j  a  v a2  s .  co  m

    TraceEvent currentEvent = threadPendingEvents.peek();
    currentEvent.addData(data);
}

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From source file:org.dhatim.json.JSONReader.java

public void parse(InputSource csvInputSource) throws IOException, SAXException {
    if (contentHandler == null) {
        throw new IllegalStateException("'contentHandler' not set.  Cannot parse JSON stream.");
    }// ww  w  . j  a v a2s .c o m
    if (executionContext == null) {
        throw new IllegalStateException(
                "Smooks container 'executionContext' not set.  Cannot parse JSON stream.");
    }

    try {
        // Get a reader for the JSON source...
        Reader jsonStreamReader = csvInputSource.getCharacterStream();
        if (jsonStreamReader == null) {
            jsonStreamReader = new InputStreamReader(csvInputSource.getByteStream(), encoding);
        }

        // Create the JSON parser...
        JsonParser jp = null;
        try {

            if (logger.isTraceEnabled()) {
                logger.trace("Creating JSON parser");
            }

            jp = jsonFactory.createJsonParser(jsonStreamReader);

            // Start the document and add the root "csv-set" element...
            contentHandler.startDocument();
            startElement(rootName, 0);

            if (logger.isTraceEnabled()) {
                logger.trace("Starting JSON parsing");
            }

            boolean first = true;
            Stack<String> elementStack = new Stack<String>();
            Stack<Type> typeStack = new Stack<Type>();
            JsonToken t;
            while ((t = jp.nextToken()) != null) {

                if (logger.isTraceEnabled()) {
                    logger.trace("Token: " + t.name());
                }

                switch (t) {

                case START_OBJECT:
                case START_ARRAY:
                    if (!first) {
                        if (!typeStack.empty() && typeStack.peek() == Type.ARRAY) {
                            startElement(arrayElementName, typeStack.size());
                        }
                    }
                    typeStack.push(t == JsonToken.START_ARRAY ? Type.ARRAY : Type.OBJECT);
                    break;

                case END_OBJECT:
                case END_ARRAY:

                    typeStack.pop();

                    boolean typeStackPeekIsArray = !typeStack.empty() && typeStack.peek() == Type.ARRAY;

                    if (!elementStack.empty() && !typeStackPeekIsArray) {
                        endElement(elementStack.pop(), typeStack.size());
                    }

                    if (typeStackPeekIsArray) {
                        endElement(arrayElementName, typeStack.size());
                    }
                    break;

                case FIELD_NAME:

                    String text = jp.getText();

                    if (logger.isTraceEnabled()) {
                        logger.trace("Field name: " + text);
                    }

                    String name = getElementName(text);

                    startElement(name, typeStack.size());
                    elementStack.add(name);

                    break;

                default:

                    String value;

                    if (t == JsonToken.VALUE_NULL) {
                        value = nullValueReplacement;
                    } else {
                        value = jp.getText();
                    }

                    if (typeStack.peek() == Type.ARRAY) {

                        startElement(arrayElementName, typeStack.size());
                    }

                    contentHandler.characters(value.toCharArray(), 0, value.length());

                    if (typeStack.peek() == Type.ARRAY) {

                        endElement(arrayElementName);

                    } else {

                        endElement(elementStack.pop());

                    }

                    break;

                }

                first = false;
            }
            endElement(rootName, 0);
            contentHandler.endDocument();
        } finally {

            try {
                jp.close();
            } catch (Exception e) {
            }

        }
    } finally {
        // These properties need to be reset for every execution (e.g. when reader is pooled).
        contentHandler = null;
        executionContext = null;
    }
}

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From source file:org.dhatim.yaml.handler.YamlEventStreamHandler.java

public void handle(EventHandler eventHandler, Iterable<Event> yamlEventStream) throws SAXException {

    Stack<String> elementNameStack = new Stack<String>();
    Stack<Type> typeStack = new Stack<Type>();

    boolean isNextElementName = true;
    boolean outputStructAsElement = false;
    for (Event e : yamlEventStream) {

        if (logger.isTraceEnabled()) {
            logger.trace("Event: " + e);
        }/* w w  w . j  a  v a  2 s .c  o m*/

        if (e.is(ID.DocumentStart)) {
            elementNameStack.push(documentName);

            outputStructAsElement = true;
        } else if (e.is(ID.Scalar)) {
            ScalarEvent es = (ScalarEvent) e;

            if (isNextElementName && !lastTypeIsArray(typeStack)) {
                String name = nameFormatter.format(es.getValue());

                if (logger.isTraceEnabled()) {
                    logger.trace("Element name: " + name);
                }

                elementNameStack.push(name);

                eventHandler.addNameEvent(es, name);

                isNextElementName = false;
            } else {
                String elementName = typeStack.peek() == Type.SEQUENCE ? arrayElementName
                        : elementNameStack.pop();

                eventHandler.addValueEvent(es, elementName, es.getValue());

                isNextElementName = true;
            }
        } else if (e.is(ID.MappingStart) || e.is(ID.SequenceStart)) {
            CollectionStartEvent cse = (CollectionStartEvent) e;

            if (outputStructAsElement) {
                String elementName = lastTypeIsArray(typeStack) ? arrayElementName : elementNameStack.peek();
                eventHandler.startStructureEvent(cse, elementName);
            }

            typeStack.push(e.is(ID.SequenceStart) ? Type.SEQUENCE : Type.MAPPING);

            outputStructAsElement = true;
            isNextElementName = true;
        } else if (e.is(ID.MappingEnd) || e.is(ID.SequenceEnd)) {
            typeStack.pop();

            boolean typeStackPeekIsArray = lastTypeIsArray(typeStack);

            if (!elementNameStack.empty() && !typeStackPeekIsArray) {
                eventHandler.endStructureEvent(e, elementNameStack.pop());
            }

            if (typeStackPeekIsArray) {
                eventHandler.endStructureEvent(e, arrayElementName);
            }

        } else if (e.is(ID.Alias)) {
            String elementName = lastTypeIsArray(typeStack) ? arrayElementName : elementNameStack.pop();

            eventHandler.addAliasEvent((AliasEvent) e, elementName);

            isNextElementName = true;
        }

    }
}

---

From source file:ca.mcgill.cs.swevo.qualyzer.editors.RTFDocumentProvider2.java

/**
 * Returns the set of tags at the top of the stack. Return an empty set if the stack is empty. This should never
 * occur, but some badly-formatted RTF documents seem to lead to this situation.
 * // w w  w  .j av  a  2 s  . c o m
 * @param state
 * @param pop
 * @return
 */
private Map<String, Integer> safeState(Stack<Map<String, Integer>> state, boolean pop) {
    if (!state.isEmpty()) {
        if (pop) {
            return state.pop();
        } else {
            return state.peek();
        }
    } else {
        gLogger.error("State was empty.");
        return new HashMap<String, Integer>();
    }
}

---

From source file:org.breizhbeans.thrift.tools.thriftmongobridge.protocol.TBSONUnstackedProtocol.java

@Override
public void writeMapEnd() throws TException {
    //System.out.println("writeMapEnd");
    // Collapse the map into the structure

    // Get the DBObject produced (the map)
    Stack<ThriftIO> thriftIOStack = threadSafeSIOStack.get();
    ThriftIO mapThriftIO = thriftIOStack.pop();

    // add {fieldName:value} to the current object
    ThriftFieldMetadata field = peekWriteField();

    ThriftIO documentThriftIO = thriftIOStack.peek();
    // write the document (hash)
    documentThriftIO.mongoIO.put(field.tfield.name, mapThriftIO.mongoIO);
    // write the secured (hash)
    if (documentThriftIO.securedMongoIO != null) {
        documentThriftIO.securedMongoIO.put(Short.toString(field.tfield.id), mapThriftIO.securedMongoIO);
    }/*from   w w  w . j av a  2s  .c om*/
}

---

From source file:com.blackducksoftware.integration.hub.detect.detector.pip.PipenvGraphParser.java

public PipParseResult parse(final String projectName, final String projectVersionName,
        final List<String> pipFreezeOutput, final List<String> pipenvGraphOutput, final String sourcePath) {
    final MutableMapDependencyGraph dependencyGraph = new MutableMapDependencyGraph();
    final Stack<Dependency> dependencyStack = new Stack<>();

    final Map<String, String[]> pipFreezeMap = pipFreezeOutput.stream()
            .map(line -> line.split(TOP_LEVEL_SEPARATOR)).filter(splitLine -> splitLine.length == 2)
            .collect(Collectors.toMap(splitLine -> splitLine[0].trim().toLowerCase(), splitLine -> splitLine));

    int lastLevel = -1;
    for (final String line : pipenvGraphOutput) {
        final int currentLevel = getLevel(line);
        final Optional<Dependency> parsedDependency = getDependencyFromLine(pipFreezeMap, line);

        if (!parsedDependency.isPresent()) {
            continue;
        }//www . j  a  v a2  s .c o  m

        final Dependency dependency = parsedDependency.get();

        if (currentLevel == lastLevel) {
            dependencyStack.pop();
        } else {
            for (; lastLevel >= currentLevel; lastLevel--) {
                dependencyStack.pop();
            }
        }

        if (dependencyStack.size() > 0) {
            dependencyGraph.addChildWithParent(dependency, dependencyStack.peek());
        } else {
            dependencyGraph.addChildrenToRoot(dependency);
        }

        lastLevel = currentLevel;
        dependencyStack.push(dependency);
    }

    if (!dependencyGraph.getRootDependencyExternalIds().isEmpty()) {
        final ExternalId projectExternalId = externalIdFactory.createNameVersionExternalId(Forge.PYPI,
                projectName, projectVersionName);
        final DetectCodeLocation codeLocation = new DetectCodeLocation.Builder(DetectCodeLocationType.PIP,
                sourcePath, projectExternalId, dependencyGraph).build();
        return new PipParseResult(projectName, projectVersionName, codeLocation);
    } else {
        return null;
    }
}

---

From source file:org.breizhbeans.thrift.tools.thriftmongobridge.protocol.TBSONUnstackedProtocol.java

private DBObject collapseIOStack() throws TException {
    // Get the DBObject produced
    Stack<ThriftIO> thriftIOStack = threadSafeSIOStack.get();
    ThriftIO thriftIO = thriftIOStack.pop();

    //System.out.println("Collapse thrift IO : " + thriftIO.toString());

    //Collapse// ww  w  .  ja v a  2s  . co m
    if (thriftIOStack.size() > 0) {
        ThriftIO lastThriftIO = thriftIOStack.peek();

        if (lastThriftIO.map) {
            // add {key:value} to the current object and reset the key
            lastThriftIO.mongoIO.put(lastThriftIO.key, thriftIO.mongoIO);
            lastThriftIO.key = null;
        } else if (lastThriftIO.list) {
            ((BasicDBList) lastThriftIO.mongoIO).add(thriftIO.mongoIO);
        } else {
            // Dont forget to collapse the secured wrap to the current object
            if (thriftIO.securedMongoIO != null) {
                thriftIO.mongoIO.put("securedwrap", thriftIO.securedMongoIO);
            }

            // add {fieldName:value} to the current object
            String fieldName = peekWriteField().tfield.name;
            lastThriftIO.mongoIO.put(fieldName, thriftIO.mongoIO);

        }
        return null;
    }

    // not collapsed
    // Dont forget to add the secured wrap
    if (thriftIO.securedMongoIO != null) {
        thriftIO.mongoIO.put("securedwrap", thriftIO.securedMongoIO);
    }
    return thriftIO.mongoIO;
}

---

From source file:org.sakaiproject.poll.service.impl.PollListManagerImpl.java

@SuppressWarnings("unchecked")
public String archive(String siteId, Document doc, Stack stack, String archivePath, List attachments) {
    log.debug("archive: poll " + siteId);
    // prepare the buffer for the results log
    StringBuilder results = new StringBuilder();

    // String assignRef = assignmentReference(siteId, SiteService.MAIN_CONTAINER);
    results.append("archiving " + getLabel() + " context " + Entity.SEPARATOR + siteId + Entity.SEPARATOR
            + SiteService.MAIN_CONTAINER + ".\n");

    // start with an element with our very own (service) name
    Element element = doc.createElement(PollListManager.class.getName());
    ((Element) stack.peek()).appendChild(element);
    stack.push(element);/*from w ww  .j  a v a  2s . c  om*/

    List pollsList = findAllPolls(siteId);
    log.debug("got list of " + pollsList.size() + " polls");
    for (int i = 0; pollsList.size() > i; i++) {
        try {
            Poll poll = (Poll) pollsList.get(i);
            log.info("got poll " + poll.getId());

            // archive this assignment
            Element el = poll.toXml(doc, stack);

            // since we aren't archiving votes too, don't worry about archiving the
            // soft-deleted options -- only "visible".
            List options = getVisibleOptionsForPoll(poll.getPollId());

            for (int q = 0; options.size() > q; q++) {
                Option opt = (Option) options.get(q);
                Element el2 = PollUtil.optionToXml(opt, doc, stack);
                el.appendChild(el2);
            }

            element.appendChild(el);
        } catch (Exception e) {
            e.printStackTrace();
        }

    } // while

    stack.pop();

    return results.toString();
}

---

From source file:org.apache.fop.fo.FONode.java

/**
 * Collect the sequence of delimited text ranges, where each new
 * range is pushed onto RANGES./*  w w w  .  ja va  2s  .c om*/
 * @param ranges a stack of delimited text ranges
 * @return the (possibly) updated stack of delimited text ranges
 */
public Stack collectDelimitedTextRanges(Stack ranges) {
    // if boundary before, then push new range
    if (isRangeBoundaryBefore()) {
        maybeNewRange(ranges);
    }
    // get current range, if one exists
    DelimitedTextRange currentRange;
    if (ranges.size() > 0) {
        currentRange = (DelimitedTextRange) ranges.peek();
    } else {
        currentRange = null;
    }
    // proceses this node
    ranges = collectDelimitedTextRanges(ranges, currentRange);
    // if boundary after, then push new range
    if (isRangeBoundaryAfter()) {
        maybeNewRange(ranges);
    }
    return ranges;
}

---

From source file:gr.abiss.calipso.wicket.customattrs.CustomAttributeUtils.java

/**
 * Parses the given user intput to create the custom attribute lookup values (options) and their translations, 
 * then add them to the given CustomAttribute.
 * @param optionsTextIput//  w  ww. j  a va 2  s .  c o  m
 * @param attribute
 * @param languages
 */
public static void parseOptionsIntoAttribute(Map<String, String> optionsTextIput, CustomAttribute attribute,
        List<Language> languages) {
    //logger.info("parseOptionsIntoAttribute, attribute: "+attribute);
    // add options
    attribute.setPersistedVersion(attribute.getVersion());
    attribute.setVersion(attribute.getVersion() + 1);
    attribute.removeAllLookupValues();
    List<CustomAttributeLookupValue> optionsList = new LinkedList<CustomAttributeLookupValue>();
    String languageId = null;
    for (Language language : languages) {
        if (languageId == null) {
            languageId = language.getId();
        }
        String input = optionsTextIput.get(language.getId());
        //logger.info("textAreaOptions.get(language.getId(): "+input);
        if (StringUtils.isNotBlank(input)) {
            Stack<CustomAttributeLookupValue> parents = new Stack<CustomAttributeLookupValue>();
            String[] lines = input.split("\\r?\\n");
            int listIndex = -1;
            for (int j = 0; j < lines.length; j++) {

                listIndex++;
                // count whitespace characters to determine level
                String line = lines[j];
                //logger.info("Reading option line: "+line);
                int countLevel = 1;
                int limit = line.length();
                for (int i = 0; i < limit; ++i) {
                    if (Character.isWhitespace(line.charAt(i))) {
                        ++countLevel;
                    } else {
                        break;
                    }
                }
                String translatedName = line.substring(countLevel - 1).trim();

                //logger.info("translatedName: "+translatedName);
                // build CustomAttributeLookupValue if it doesn't already exist
                CustomAttributeLookupValue lookupValue;
                if (language.getId().equalsIgnoreCase(languageId)) {
                    //logger.info("creating new lookupValue and adding to list index " + listIndex + " for " + translatedName);
                    lookupValue = new CustomAttributeLookupValue();
                    optionsList.add(lookupValue);
                } else {
                    //logger.info("trying to get lookupValue from list index " + listIndex + "for "+translatedName);
                    lookupValue = optionsList.get(listIndex);
                }
                lookupValue.setShowOrder(listIndex);
                if (language.getId().equalsIgnoreCase("en")) {
                    lookupValue.setName(translatedName);
                    lookupValue.setValue(translatedName);
                }
                lookupValue.setLevel(countLevel);

                // fix parent/child
                while ((!parents.isEmpty()) && parents.peek().getLevel() >= lookupValue.getLevel()) {
                    parents.pop();
                }
                // pile it
                if (lookupValue.getLevel() > 1) {
                    //logger.info("Adding child "+lookupValue.getName() + "to parent " +parents.peek());
                    parents.peek().addChild(lookupValue);
                }
                parents.push(lookupValue);
                // add the translation
                //logger.info("Adding lookup value "+language.getId()+" translation: "+translatedName);
                lookupValue.addNameTranslation(language.getId(), translatedName);
                //logger.info("translations afre now: "+lookupValue.getNameTranslations());

            }
        }
        //Set<CustomAttributeLookupValue> lookupValueSet = new HashSet<CustomAttributeLookupValue>();
        //lookupValueSet.addAll(optionsList);

    }
    // update attribute lookup values
    attribute.removeAllLookupValues();
    /*
    List<CustomAttributeLookupValue> toRemove = new LinkedList<CustomAttributeLookupValue>();
    for(CustomAttributeLookupValue value : attribute.getAllowedLookupValues()){
       toRemove.add(value);
    }
    attribute.removeAll(toRemove);*/
    for (CustomAttributeLookupValue value : optionsList) {
        //logger.info("Adding lookupValue  with translations: "+value.getNameTranslations());
        attribute.addAllowedLookupValue(value);
    }
    //logger.info("Added lookup values: "+attribute.getAllowedLookupValues());
}

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