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.datastax.hectorjpa.spring.ConsistencyLevelAspect.java

/**
 * Validates any method that has the valid annotation on it and is wired as
 * a spring service/*from   w ww. java2s  .c  o  m*/
 * 
 * @param jp
 * @throws Throwable
 */
@Around("@annotation(com.datastax.hectorjpa.spring.Consistency)")
public Object setConsistency(ProceedingJoinPoint pjp) throws Throwable {

    logger.debug("Invoking before advice for @Consistency annotation.  Target object is {} on method {}",
            pjp.getTarget(), pjp.getSignature());

    MethodSignature sig = (MethodSignature) pjp.getSignature();

    Object[] args = pjp.getArgs();

    Method signatureMethod = sig.getMethod();

    Class<?>[] signatureTypes = signatureMethod.getParameterTypes();

    // we do this because we want to get the best match from the child
    // classes
    Class<?>[] runtimeArgs = new Class<?>[signatureTypes.length];

    for (int i = 0; i < signatureTypes.length; i++) {

        if (args[i] != null) {
            runtimeArgs[i] = args[i].getClass();
        } else {
            runtimeArgs[i] = signatureTypes[i];
        }
    }

    Class<?> runtimeClass = pjp.getTarget().getClass();

    // check if this is annotated, if not proceed and execute it

    HConsistencyLevel level = consistency(runtimeClass, signatureMethod.getName(), runtimeArgs);

    if (level == null) {
        return pjp.proceed(args);
    }

    Stack<HConsistencyLevel> stack = threadStack.get();

    stack.push(level);
    JPAConsistency.set(level);

    Object result = null;

    try {
        result = pjp.proceed(args);
    } finally {
        stack.pop();

        if (stack.size() > 0) {
            JPAConsistency.set(stack.peek());
        } else {
            JPAConsistency.remove();
        }

    }

    return result;
}

---

From source file:mml.handler.get.MMLGetMMLHandler.java

/**
 * Are we in a section governed by a line format?
 * @param stack the tag stack// ww w . java2  s .c  o m
 * @return true if it is true
 */
boolean isLineFormat(Stack<EndTag> stack) {
    if (!stack.isEmpty()) {
        EndTag top = stack.peek();
        if (top != null) {
            String prop = (String) top.def.get("prop");
            return lineFormats.contains(prop);
        } else
            return false;
    } else
        return false;
}

---

From source file:org.apache.synapse.mediators.GetPropertyFunction.java

/**
 * Returns the string value of the property using arg one as key and arg two as scope
 *
 * @param scopeObject scope will decide from where property will be picked up from
 *        i.e. axis2, transport, default/synapse
 * @param keyObject the key of the property
 * @param navigator object model which can be used for navigation around
 * @param dateformat The dateformat that need to convert
 * @return The String value of property using arg one as key and arg two as scope
 *//*from   w  w  w  .  ja v  a2  s. c  om*/
public Object evaluate(Object scopeObject, Object keyObject, Object dateformat, Navigator navigator) {

    boolean traceOn = synCtx.getTracingState() == SynapseConstants.TRACING_ON;
    boolean traceOrDebugOn = traceOn || log.isDebugEnabled();

    String scope = StringFunction.evaluate(scopeObject, navigator);
    String key = StringFunction.evaluate(keyObject, navigator);

    if (key == null || "".equals(key)) {
        if (traceOrDebugOn) {
            traceOrDebug(traceOn, "property-name should be provided when executing synapse:get-property"
                    + "(scope,prop-name) or synapse:get-property(prop-name) Xpath function");
        }
        return NULL_STRING;
    }

    //Irrespective of the scope ,if the dateformat has provided ,
    // should return the Date according to the provided format

    if (SynapseConstants.SYSTEM_DATE.equals(key)) {
        if (dateformat != null) {
            Format formatter = new SimpleDateFormat(dateformat.toString());
            return formatter.format(new java.util.Date());
        } else {
            Format formatter = new SimpleDateFormat();
            return formatter.format(new java.util.Date());
        }
    }

    //return the current system time as a string , don't care scope
    if (SynapseConstants.SYSTEM_TIME.equals(key)) {

        return Long.toString(System.currentTimeMillis());
    }

    if (XMLConfigConstants.SCOPE_DEFAULT.equals(scope)) {

        if (SynapseConstants.HEADER_TO.equals(key)) {
            EndpointReference toEPR = synCtx.getTo();
            if (toEPR != null) {
                return toEPR.getAddress();
            } else {
                return NULL_STRING;
            }
        } else if (SynapseConstants.HEADER_FROM.equals(key)) {
            EndpointReference fromEPR = synCtx.getFrom();
            if (fromEPR != null) {
                return fromEPR.getAddress();
            } else {
                return NULL_STRING;
            }
        } else if (SynapseConstants.HEADER_ACTION.equals(key)) {
            String wsaAction = synCtx.getWSAAction();
            if (wsaAction != null) {
                return wsaAction;
            } else {
                return NULL_STRING;
            }
        } else if (SynapseConstants.HEADER_FAULT.equals(key)) {
            EndpointReference faultEPR = synCtx.getFaultTo();
            if (faultEPR != null) {
                return faultEPR.getAddress();
            } else {
                return NULL_STRING;
            }
        } else if (SynapseConstants.HEADER_REPLY_TO.equals(key)) {
            EndpointReference replyToEPR = synCtx.getReplyTo();
            if (replyToEPR != null) {
                return replyToEPR.getAddress();
            } else {
                return NULL_STRING;
            }
        } else if (SynapseConstants.HEADER_RELATES_TO.equals(key)) {
            RelatesTo relatesTo = synCtx.getRelatesTo();
            if (relatesTo != null) {
                return relatesTo.getValue();
            } else {
                return NULL_STRING;
            }
        } else if (SynapseConstants.HEADER_MESSAGE_ID.equals(key)) {
            String messageID = synCtx.getMessageID();
            if (messageID != null) {
                return messageID;
            } else {
                return NULL_STRING;
            }
        } else if (SynapseConstants.PROPERTY_FAULT.equals(key)) {
            if (synCtx.getEnvelope().hasFault()) {
                return SynapseConstants.TRUE;
            } else if (synCtx instanceof Axis2MessageContext) {
                org.apache.axis2.context.MessageContext axis2MessageContext = ((Axis2MessageContext) synCtx)
                        .getAxis2MessageContext();
                if (axis2MessageContext.getProperty(BaseConstants.FAULT_MESSAGE) != null
                        && SynapseConstants.TRUE
                                .equals(axis2MessageContext.getProperty(BaseConstants.FAULT_MESSAGE))) {
                    return SynapseConstants.TRUE;
                }
            } else {
                return NULL_STRING;
            }
        } else if (SynapseConstants.PROPERTY_MESSAGE_FORMAT.equals(key)) {
            if (synCtx.isDoingPOX())
                return SynapseConstants.FORMAT_POX;
            else if (synCtx.isDoingGET())
                return SynapseConstants.FORMAT_GET;
            else if (synCtx.isSOAP11())
                return SynapseConstants.FORMAT_SOAP11;
            else
                return SynapseConstants.FORMAT_SOAP12;
        } else if (SynapseConstants.PROPERTY_OPERATION_NAME.equals(key)
                || SynapseConstants.PROPERTY_OPERATION_NAMESPACE.equals(key)) {
            if (synCtx instanceof Axis2MessageContext) {
                AxisOperation axisOperation = ((Axis2MessageContext) synCtx).getAxis2MessageContext()
                        .getAxisOperation();
                if (axisOperation != null) {
                    if (SynapseConstants.PROPERTY_OPERATION_NAMESPACE.equals(key)) {
                        return axisOperation.getName().getNamespaceURI();
                    } else {
                        return axisOperation.getName().getLocalPart();
                    }
                }
            }
        } else {
            Object result = synCtx.getProperty(key);
            if (result != null) {
                return result;
            } else {
                return synCtx.getEntry(key);
            }
        }
    } else if (XMLConfigConstants.SCOPE_AXIS2.equals(scope) && synCtx instanceof Axis2MessageContext) {

        org.apache.axis2.context.MessageContext axis2MessageContext = ((Axis2MessageContext) synCtx)
                .getAxis2MessageContext();
        return axis2MessageContext.getProperty(key);

    } else if (XMLConfigConstants.SCOPE_FUNC.equals(scope)) {
        Stack<TemplateContext> functionStack = (Stack) synCtx
                .getProperty(SynapseConstants.SYNAPSE__FUNCTION__STACK);
        TemplateContext topCtxt = functionStack.peek();
        if (topCtxt != null) {
            return topCtxt.getParameterValue(key);
        }
    } else if (XMLConfigConstants.SCOPE_TRANSPORT.equals(scope) && synCtx instanceof Axis2MessageContext) {

        org.apache.axis2.context.MessageContext axis2MessageContext = ((Axis2MessageContext) synCtx)
                .getAxis2MessageContext();
        Object headers = axis2MessageContext
                .getProperty(org.apache.axis2.context.MessageContext.TRANSPORT_HEADERS);

        if (headers != null && headers instanceof Map) {
            Map headersMap = (Map) headers;
            return headersMap.get(key);
        }

    } else if (XMLConfigConstants.SCOPE_OPERATION.equals(scope) && synCtx instanceof Axis2MessageContext) {
        Axis2MessageContext axis2smc = (Axis2MessageContext) synCtx;
        org.apache.axis2.context.MessageContext axis2MessageCtx = axis2smc.getAxis2MessageContext();
        return axis2smc.getAxis2MessageContext().getOperationContext().getProperty(key);
    } else if (XMLConfigConstants.SCOPE_REGISTRY.equals(scope)) {
        String[] regParam = key.split("@");
        String regPath = null;
        String propName = null;
        if (regParam.length == 2) {
            regPath = regParam[0];
            propName = regParam[1];
        } else if (regParam.length == 1) {
            regPath = regParam[0];
        }

        Entry propEntry = synCtx.getConfiguration().getEntryDefinition(regPath);
        if (propEntry == null) {
            propEntry = new Entry();
            propEntry.setType(Entry.REMOTE_ENTRY);
            propEntry.setKey(key);
        }
        Registry registry = synCtx.getConfiguration().getRegistry();
        if (registry != null) {
            registry.getResource(propEntry, new Properties());
            if (propName != null) {
                Properties reqProperties = propEntry.getEntryProperties();
                if (reqProperties != null) {
                    if (reqProperties.get(propName) != null) {
                        return reqProperties.getProperty(propName);
                    }
                }
            } else if (propEntry.getValue() != null) {
                if (propEntry.getValue() instanceof OMText) {
                    return ((OMText) propEntry.getValue()).getText();
                }
                return propEntry.getValue().toString();
            }
        }
    } else if (XMLConfigConstants.SCOPE_SYSTEM.equals(scope)) {
        String propVal = System.getProperty(key);
        if (propVal != null) {
            return propVal;
        } else {
            if (traceOrDebugOn) {
                traceOrDebug(traceOn, "System property " + key + " not found");
            }
            return NULL_STRING;
        }

    } else {
        if (traceOrDebugOn) {
            traceOrDebug(traceOn, "Invalid scope : '" + scope + "' has been set for the "
                    + "synapse:get-property(scope,prop-name) XPath function");
        }
    }
    return NULL_STRING;
}

---

From source file:org.wso2.carbon.esb.car.deployment.test.CAppDeploymentOrderTest.java

private boolean checkUnDeployLogOrder(LogViewerClient logViewerClient)
        throws LogViewerLogViewerException, RemoteException {
    LogEvent[] systemLogs;/*from  www . ja  v a2s  .co m*/
    systemLogs = logViewerClient.getAllRemoteSystemLogs();
    //Create a stack to store the intended logs in order
    Stack<String> logStack = new Stack<>();
    logStack.push("Inbound Endpoint named 'inbound-endpoint' has been undeployed");
    logStack.push("Sequence named 'test-sequence' has been undeployed");

    //Check whether the logs are in the stack's order
    if (systemLogs != null) {
        for (LogEvent logEvent : systemLogs) {
            if (logEvent == null) {
                continue;
            }
            if (logStack.size() != 0 && logEvent.getMessage().contains(logStack.peek())) {
                logStack.pop();
            }
        }
    }
    return logStack.isEmpty();
}

---

From source file:org.wso2.carbon.esb.car.deployment.test.CAppDeploymentOrderTest.java

private boolean checkLogOrder(LogViewerClient logViewerClient)
        throws LogViewerLogViewerException, RemoteException {
    LogEvent[] systemLogs;//from  w w w.  ja  v  a 2s  .c o  m
    systemLogs = logViewerClient.getAllRemoteSystemLogs();
    //Create a stack to store the intended logs in order
    Stack<String> logStack = new Stack<>();
    logStack.push("Sequence named 'test-sequence' has been deployed from file");
    logStack.push("Inbound Endpoint named 'inbound-endpoint' has been deployed from file");

    //Check whether the logs are in the stack's order
    if (systemLogs != null) {
        for (LogEvent logEvent : systemLogs) {
            if (logEvent == null) {
                continue;
            }
            if (logStack.size() != 0 && logEvent.getMessage().contains(logStack.peek())) {
                logStack.pop();
            }
        }
    }

    return logStack.size() == 0;
}

---

From source file:com.tune.reporting.base.endpoints.EndpointBase.java

/**
 * Validate any parentheses within string are balanced.
 * @param str  Contents partitioned with parentheses.
 * @return Boolean If contents contains balanced parentheses returns true.
 *//* w  w  w . j a  v  a  2 s  .c  om*/
public static boolean isParenthesesBalanced(final String str) {
    if (str.isEmpty()) {
        return true;
    }

    Stack<Character> stack = new Stack<Character>();
    for (int i = 0; i < str.length(); i++) {
        char current = str.charAt(i);
        if (current == '{' || current == '(' || current == '[') {
            stack.push(current);
        }

        if (current == '}' || current == ')' || current == ']') {
            if (stack.isEmpty()) {
                return false;
            }

            char last = stack.peek();
            if (current == '}' && last == '{' || current == ')' && last == '('
                    || current == ']' && last == '[') {
                stack.pop();
            } else {
                return false;
            }
        }
    }

    return stack.isEmpty();
}

---

From source file:com.spidertracks.datanucleus.spring.ConsistencyLevelAspect.java

/**
 * Validates any method that has the valid annotation on it and is wired as
 * a spring service//  w w  w.  j  ava  2 s .  co  m
 * 
 * @param jp
 * @throws Throwable
 */
@Around("@annotation(com.spidertracks.datanucleus.spring.Consistency)")
public Object setConsistency(ProceedingJoinPoint pjp) throws Throwable {

    logger.debug("Invoking before advice for @Consistency annotation.  Target object is {} on method {}",
            pjp.getTarget(), pjp.getSignature());

    MethodSignature sig = (MethodSignature) pjp.getSignature();

    Object[] args = pjp.getArgs();

    Method signatureMethod = sig.getMethod();

    Class<?>[] signatureTypes = signatureMethod.getParameterTypes();

    // we do this because we want to get the best match from the child
    // classes
    Class<?>[] runtimeArgs = new Class<?>[signatureTypes.length];

    for (int i = 0; i < signatureTypes.length; i++) {

        if (args[i] != null) {
            runtimeArgs[i] = args[i].getClass();
        } else {
            runtimeArgs[i] = signatureTypes[i];
        }
    }

    Class<?> runtimeClass = pjp.getTarget().getClass();

    // check if this is annotated, if not proceed and execute it

    ConsistencyLevel level = consistency(runtimeClass, signatureMethod.getName(), runtimeArgs);

    if (level == null) {
        return pjp.proceed(args);
    }

    Stack<ConsistencyLevel> stack = threadStack.get();

    stack.push(level);
    com.spidertracks.datanucleus.client.Consistency.set(level);

    Object result = null;

    try {
        result = pjp.proceed(args);
    } finally {
        stack.pop();

        if (stack.size() > 0) {
            com.spidertracks.datanucleus.client.Consistency.set(stack.peek());
        } else {
            com.spidertracks.datanucleus.client.Consistency.remove();
        }

    }

    return result;
}

---

From source file:edu.kit.dama.mdm.dataorganization.impl.jpa.DataOrganizerImpl.java

/**
 * Build a tree for a digital object id from a list of DataOrganizationNode
 * obtained from a data source.//from   ww w  .java2  s .  c om
 *
 * @param nodes The list of nodes.
 * @param digitalObjectID The digital object id the tree is associated with.
 *
 * @return The tree.
 */
private FileTree buildTree(List<DataOrganizationNode> nodes, DigitalObjectId digitalObjectID) {

    FileTree tree = null;
    if (!nodes.isEmpty()) {
        Stack<DataOrganizationNode> stack = new Stack<>();
        DataOrganizationNode node = nodes.get(0);
        if (!(node instanceof CollectionNode)) {
            return null;
        }
        tree = new FileTree((CollectionNode) node);
        tree.setDigitalObjectId(digitalObjectID);
        node = tree;
        stack.push(node);
        DataOrganizationNode nextNode;
        for (int i = 1; i < nodes.size(); ++i) {
            nextNode = nodes.get(i);
            while (stack.peek().getStepNoLeaved() < nextNode.getStepNoLeaved()) {
                stack.pop();
            }
            node = stack.peek();
            ((CollectionNode) node).addChild(nextNode);
            stack.push(nextNode);
        }
    }
    return tree;
}

---

From source file:org.apache.tiles.impl.BasicTilesContainer.java

/**
 * Get attribute context from request./*from w  w w  .  j  a  v a2s.  c o  m*/
 *
 * @param tilesContext current Tiles application context.
 * @return BasicAttributeContext or null if context is not found.
 * @since 2.0.6
 */
protected AttributeContext getContext(TilesRequestContext tilesContext) {
    Stack<AttributeContext> contextStack = getContextStack(tilesContext);
    if (!contextStack.isEmpty()) {
        return contextStack.peek();
    } else {
        return null;
    }
}

---

From source file:org.apache.tiles.impl.BasicTilesContainer.java

/**
 * Starts an attribute context inside the container.
 *
 * @param tilesContext The request context to use.
 * @return The newly created attribute context.
 *///from  ww  w  . j a v a  2 s.co  m
private AttributeContext startContext(TilesRequestContext tilesContext) {
    AttributeContext context = new BasicAttributeContext();
    Stack<AttributeContext> stack = getContextStack(tilesContext);
    if (!stack.isEmpty()) {
        AttributeContext parent = stack.peek();
        context.inheritCascadedAttributes(parent);
    }
    stack.push(context);
    return context;
}

---

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