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:org.sakaiproject.signup.restful.SignupEvent.java

public Element toXml(Document doc, Stack stack) {
    Element event = doc.createElement("signupEvent");

    if (stack.isEmpty()) {
        doc.appendChild(event);/*from   ww  w. jav a 2  s.c om*/
    } else {
        ((Element) stack.peek()).appendChild(event);
    }

    stack.push(event);

    event.setAttribute("id", getId());
    event.setAttribute("eventid", getEventId().toString());
    event.setAttribute("title", getTitle());
    event.setAttribute("organizer", this.getOrganizerName());
    event.setAttribute("location", this.getLocation());
    event.setAttribute("event-type", this.getMeetingType());
    event.setAttribute("event-recurrenceId", this.getRecurrenceId().toString());

    if (description != null)
        event.setAttribute("description", description);

    event.setAttribute("start-time", this.getStartTime().toString());
    event.setAttribute("end-time", this.getEndTime().toString());
    event.setAttribute("signup-begin", this.getSignupBegins().toString());
    event.setAttribute("signup-deadline", this.getSignupDeadline().toString());
    // event.setAttribute("repeat-event",
    // Boolean.valueOf(isRecurredMeeting()).toString());
    // properties
    // getProperties().toXml(doc, stack);
    // apppend the options as chidren

    stack.pop();

    return event;
}

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From source file:org.wso2.carbon.repository.core.jdbc.dataaccess.JDBCDatabaseTransaction.java

private static TransactionEntry getStackedTransactionalEntry() {
    Stack<TransactionEntry> transactionalEntryStack = tStackedTransactionalEntryStack.get();

    if (transactionalEntryStack == null) {
        tStackedTransactionalEntryStack.remove();
        transactionalEntryStack = tStackedTransactionalEntryStack.get();
    }//from ww  w . j ava2  s.  co m

    return transactionalEntryStack.peek();
}

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From source file:padl.creator.cppfile.eclipse.plugin.internal.GeneratorHelper.java

void convertDeclaration(final Accumulator anAccumulator, final ICPPASTNamespaceDefinition aDeclaration,
        final Stack<IContainer> someContainers) {

    IContainer container = someContainers.peek();
    // If the current container is the default package,
    // I add the new package (if one must be created)
    // into the code-level model.
    if (container.equals(this.codeLevelModel.getConstituentFromID(Constants.DEFAULT_PACKAGE_ID))) {

        container = this.codeLevelModel;
    }/* w  ww.  j  ava2  s  .c om*/

    final IBinding binding = ((ICPPASTNamespaceDefinition) aDeclaration).getName().resolveBinding();
    final String namespaceName = binding.getName();
    final char[] id;
    if (StringUtils.EMPTY.equals(namespaceName)) {
        id = Utils.createAnonymousName(GeneratorHelper.UniqueID++);
    } else {
        id = namespaceName.toCharArray();
    }

    // In C++, it is legitimate to have the same space
    // declared in multiple files, a way to share its
    // content and its declarations... So, yes, if it
    // already exists, do nothing, just reuse the one
    // created the first time.
    if (container.doesContainConstituentWithID(id)) {
        final IContainer existingPackage = (IContainer) container.getConstituentFromID(id);
        someContainers.push(existingPackage);
        return;
    }

    final IPackage newPackage = ((ICPPFactoryEclipse) CPPFactoryEclipse.getInstance()).createPackage(id);
    container.addConstituent(newPackage);
    someContainers.push(newPackage);
}

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From source file:org.apache.hadoop.hbase.filter.ParseFilter.java

/**
 * This function is called while parsing the filterString and an operator is parsed
 * <p>//  w ww. j  a v a 2  s.  com
 * @param operatorStack the stack containing the operators and parenthesis
 * @param filterStack the stack containing the filters
 * @param operator the operator found while parsing the filterString
 */
public void reduce(Stack<ByteBuffer> operatorStack, Stack<Filter> filterStack, ByteBuffer operator) {
    while (!operatorStack.empty() && !(ParseConstants.LPAREN_BUFFER.equals(operatorStack.peek()))
            && hasHigherPriority(operatorStack.peek(), operator)) {
        filterStack.push(popArguments(operatorStack, filterStack));
    }
}

---

From source file:padl.creator.cppfile.eclipse.plugin.internal.GeneratorHelper.java

private void addVariableToModelOrFieldToClass(final ICPPVariable aCPPVariable,
        final Stack<IContainer> someContainers) {

    final IContainer container = someContainers.peek();

    final String[] qualifiedNameRow;
    try {//ww w .j a  va  2 s  .  c  o m
        qualifiedNameRow = aCPPVariable.getQualifiedName();
    } catch (final DOMException e) {
        e.printStackTrace(ProxyConsole.getInstance().errorOutput());
        throw new RuntimeException(e);
    }
    final String fieldTypeName = Utils.getInterestingTypeName(aCPPVariable.getType());
    final String fieldName = qualifiedNameRow[qualifiedNameRow.length - 1];
    final String id = fieldTypeName + '.' + fieldName;
    final IEntity fieldTypeEntity = SearchHelper.getExistingContainerOrCreateGhost(this.codeLevelModel,
            someContainers, fieldTypeName, false);

    if (Arrays.equals(((IConstituent) container).getName(), fieldName.toCharArray())) {

        // It is possible but really I don't understand why:
        // see Chrome/browser/render_widget_host_hwnd.h:class RenderWidgetHostHWND
        return;
    }

    final int cardinality = Utils.getCardinality(aCPPVariable);

    IField field = null;
    if (aCPPVariable instanceof ICPPField && !(container instanceof IPackage)) {

        field = ((ICPPFactoryEclipse) CPPFactoryEclipse.getInstance()).createField(id.toCharArray(),
                fieldName.toCharArray(), fieldTypeEntity.getName(), cardinality);
        Utils.setVisibility(field, (ICPPMember) aCPPVariable);
    } else if (aCPPVariable instanceof ICPPVariable || container instanceof IPackage) {

        field = ((ICPPFactoryEclipse) CPPFactoryEclipse.getInstance()).createGlobalField(id.toCharArray(),
                fieldName.toCharArray(), fieldTypeEntity.getName(), cardinality);
    }

    Utils.setConst(field, aCPPVariable);
    container.addConstituent(field);
}

---

From source file:padl.creator.cppfile.eclipse.plugin.internal.GeneratorHelper.java

private void addEnumerationToModel(final ICPPEnumeration aCPPEnumeration,
        final Stack<IContainer> someContainers) throws DOMException {

    final IContainer container = someContainers.peek();

    char[] id = Utils.getQualifiedName(aCPPEnumeration.getQualifiedNameCharArray());
    // It is possible for the name to be empty, 
    // for enumeration for example
    if (id.length == 0) {
        id = Utils.createAnonymousName(GeneratorHelper.UniqueID++);
    }//from w w w .j  a  v a 2  s. c om

    if (!container.doesContainConstituentWithID(id)) {
        final IEnum enumeration = ((ICPPFactoryEclipse) CPPFactoryEclipse.getInstance()).createEnum(id);

        for (final IEnumerator enumerator : aCPPEnumeration.getEnumerators()) {
            final IEnumValue anEnumValue = ((ICPPFactoryEclipse) CPPFactoryEclipse.getInstance())
                    .createEnumValue(enumerator.getName().toCharArray());
            enumeration.addConstituent(anEnumValue);
        }

        container.addConstituent(enumeration);
    }
}

---

From source file:org.apache.tajo.engine.planner.rewrite.FilterPushDownRule.java

@Override
public LogicalNode visitGroupBy(FilterPushDownContext context, LogicalPlan plan, LogicalPlan.QueryBlock block,
        GroupbyNode groupbyNode, Stack<LogicalNode> stack) throws PlanningException {
    LogicalNode parentNode = stack.peek();
    List<EvalNode> aggrEvals;
    if (parentNode.getType() == NodeType.HAVING) {
        aggrEvals = addHavingNode(context, plan, block, null, (HavingNode) parentNode, groupbyNode);
    } else {// w  w  w  . j  av  a2 s .c o m
        aggrEvals = addHavingNode(context, plan, block, (UnaryNode) parentNode, null, groupbyNode);
    }

    if (aggrEvals != null) {
        // remove aggregation eval from conext
        context.pushingDownFilters.removeAll(aggrEvals);
    }

    List<EvalNode> notMatched = new ArrayList<EvalNode>();
    // transform
    Map<EvalNode, EvalNode> tranformed = findCanPushdownAndTransform(context, block, groupbyNode,
            groupbyNode.getChild(), notMatched, null, false, 0);

    context.setFiltersTobePushed(tranformed.keySet());
    LogicalNode current = super.visitGroupBy(context, plan, block, groupbyNode, stack);

    context.setToOrigin(tranformed);
    context.addFiltersTobePushed(notMatched);

    return current;
}

---

From source file:org.apache.pdfbox.contentstream.PDFStreamEngine.java

/**
 * Saves the entire graphics stack./* w ww .  j a v  a2 s  . c o m*/
 */
protected final Stack<PDGraphicsState> saveGraphicsStack() {
    Stack<PDGraphicsState> savedStack = graphicsStack;
    graphicsStack = new Stack<PDGraphicsState>();
    graphicsStack.add(savedStack.peek().clone());
    return savedStack;
}

---

From source file:org.sakaiproject.util.BaseResourceProperties.java

/**
 * Serialize the resource into XML, adding an element to the doc under the top of the stack element.
 * /*  w  w  w.  j av a 2 s .c om*/
 * @param doc
 *        The DOM doc to contain the XML (or null for a string return).
 * @param stack
 *        The DOM elements, the top of which is the containing element of the new "resource" element.
 * @return The newly added element.
 */
public Element toXml(Document doc, Stack stack) {
    Element properties = doc.createElement("properties");
    ((Element) stack.peek()).appendChild(properties);
    Enumeration props = m_props.keys();
    while (props.hasMoreElements()) {
        String name = (String) props.nextElement();
        Object value = m_props.get(name);
        if (value instanceof String) {
            Element propElement = doc.createElement("property");
            properties.appendChild(propElement);
            propElement.setAttribute("name", name);

            // encode to allow special characters in the value
            Xml.encodeAttribute(propElement, "value", (String) value);
            propElement.setAttribute("enc", "BASE64");
        } else if (value instanceof List) {
            for (Iterator iValues = ((List) value).iterator(); iValues.hasNext();) {
                Object val = iValues.next();
                if (val instanceof String) {
                    Element propElement = doc.createElement("property");
                    properties.appendChild(propElement);
                    propElement.setAttribute("name", name);
                    Xml.encodeAttribute(propElement, "value", (String) val);
                    propElement.setAttribute("enc", "BASE64");
                    propElement.setAttribute("list", "list");
                } else {
                    M_log.warn(".toXml: in list not string: " + name);
                }
            }
        } else {
            M_log.warn(".toXml: not a string, not a value: " + name);
        }
    }

    return properties;
}

---

From source file:padl.creator.cppfile.eclipse.plugin.internal.GeneratorHelper.java

private void addEntityToModelOrMemberToClass(final Accumulator anAccumulator, final ICPPClassType aCPPEntity,
        final Stack<IContainer> someContainers) {

    final IContainer container = someContainers.peek();

    char[] id;//from   ww w  . j a v  a 2  s .  c  om
    try {
        id = Utils.getQualifiedName(aCPPEntity.getQualifiedNameCharArray());
    } catch (final DOMException e) {
        e.printStackTrace(ProxyConsole.getInstance().errorOutput());
        throw new RuntimeException(e);
    }
    char[] name = aCPPEntity.getNameCharArray();
    // It is possible for the name to be empty, 
    // for enumeration for example
    if (id.length == 0 || name.length == 0) {
        // id.length could be 1 in case of union... 
        id = Utils.createAnonymousName(GeneratorHelper.UniqueID++);
        name = id;
    }

    // Yann 2013/09/28: Name vs. ID!
    // Member entities have for name the simple name of the entity
    // but for ID the ID of their container and "$" and their ID.
    char[] memberID = ((IConstituent) container).getID();
    memberID = ArrayUtils.add(memberID, IConstants.MEMBER_ENTITY_SYMBOL);
    memberID = ArrayUtils.addAll(memberID, name);

    // It is possible that the entity already exists in the case of
    // In one file:
    //   class DebuggerWrapper;
    // In another file:
    //   class DebuggerWrapper {
    //      ...
    if (container.doesContainConstituentWithID(id) || container.doesContainConstituentWithID(memberID)) {

        return;
    }

    final IFirstClassEntity entity;
    final int type = aCPPEntity.getKey();
    if (type == ICPPASTCompositeTypeSpecifier.k_class) {
        if (container instanceof IFirstClassEntity) {
            if (Utils.isInterface(aCPPEntity)) {
                entity = ((ICPPFactoryEclipse) CPPFactoryEclipse.getInstance()).createMemberInterface(memberID,
                        name);
            } else {
                entity = ((ICPPFactoryEclipse) CPPFactoryEclipse.getInstance()).createMemberClass(memberID,
                        name);
                entity.setAbstract(Utils.isAbstract(aCPPEntity));
            }
        } else {
            if (Utils.isInterface(aCPPEntity)) {
                entity = ((ICPPFactoryEclipse) CPPFactoryEclipse.getInstance()).createInterface(id, name);
            } else {
                entity = ((ICPPFactoryEclipse) CPPFactoryEclipse.getInstance()).createClass(id, name);
                entity.setAbstract(Utils.isAbstract(aCPPEntity));
                entity.equals(entity);
            }
        }
    } else if (type == IASTCompositeTypeSpecifier.k_struct) {
        if (container instanceof IFirstClassEntity) {
            entity = ((ICPPFactoryEclipse) CPPFactoryEclipse.getInstance()).createMemberStructure(memberID);
        } else {
            entity = ((ICPPFactoryEclipse) CPPFactoryEclipse.getInstance()).createStructure(id);
        }
    } else if (type == IASTCompositeTypeSpecifier.k_union) {
        entity = ((ICPPFactoryEclipse) CPPFactoryEclipse.getInstance()).createUnion(id);
    } else {
        entity = null;
        // Should never happen! Would fail fast!
    }

    container.addConstituent(entity);
    anAccumulator.addClassTypes(aCPPEntity, entity);
}

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