Example usage for org.apache.commons.collections4.iterators PeekingIterator hasNext

Introduction

In this page you can find the example usage for org.apache.commons.collections4.iterators PeekingIterator hasNext.

Prototype

public boolean hasNext() 

Source Link

Usage

From source file:com.github.rvesse.airline.parser.options.ClassicGetOptParser.java

public ParseState<T> parseOptions(PeekingIterator<String> tokens, ParseState<T> state,
        List<OptionMetadata> allowedOptions) {
    if (!hasShortNamePrefix(tokens.peek())) {
        return null;
    }/* ww w  . j  a v a 2  s .c o m*/

    // remove leading dash from token
    String remainingToken = tokens.peek().substring(1);

    ParseState<T> nextState = state;
    boolean first = true;
    while (!remainingToken.isEmpty()) {
        char tokenCharacter = remainingToken.charAt(0);

        // is the current token character a single letter option?
        OptionMetadata option = findOption(state, allowedOptions, "-" + tokenCharacter);
        if (option == null) {
            return null;
        }

        nextState = nextState.pushContext(Context.OPTION).withOption(option);

        // remove current token character
        remainingToken = remainingToken.substring(1);

        // for no argument options, process the option and remove the
        // character from the token
        if (option.getArity() == 0) {
            nextState = nextState.withOptionValue(option, Boolean.TRUE.toString()).popContext();
            first = false;
            continue;
        }

        if (option.getArity() == 1) {
            // we must, consume the current token so we can see the next
            // token
            tokens.next();

            // if current token has more characters, this is the value;
            // otherwise it is the next token
            if (!remainingToken.isEmpty()) {
                nextState = nextState.withOptionValue(option, remainingToken).popContext();
            } else if (tokens.hasNext()) {
                nextState = nextState.withOptionValue(option, tokens.next()).popContext();
            }

            return nextState;
        }

        // Don't throw an error if this is the first option we have seen as
        // in that case the option may legitimately be processed by another
        // option parser
        if (first)
            return null;
        throw new ParseOptionUnexpectedException("Short options style can not be used with option %s", option);
    }

    // consume the current token
    tokens.next();

    return nextState;
}

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From source file:org.openscore.lang.compiler.modeller.ExecutableBuilder.java

private Workflow compileWorkFlow(List<Map<String, Map<String, Object>>> workFlowRawData,
        Map<String, String> imports, Workflow onFailureWorkFlow, boolean onFailureSection) {

    Deque<Task> tasks = new LinkedList<>();

    Validate.notEmpty(workFlowRawData, "Flow must have tasks in its workflow");

    PeekingIterator<Map<String, Map<String, Object>>> iterator = new PeekingIterator<>(
            workFlowRawData.iterator());

    boolean isOnFailureDefined = onFailureWorkFlow != null;

    String defaultFailure = isOnFailureDefined ? onFailureWorkFlow.getTasks().getFirst().getName()
            : FAILURE_RESULT;/*from w w  w.j  a  va 2s .c o  m*/

    Set<String> taskNames = new HashSet<>();

    while (iterator.hasNext()) {
        Map<String, Map<String, Object>> taskRawData = iterator.next();
        Map<String, Map<String, Object>> nextTaskData = iterator.peek();
        String taskName = taskRawData.keySet().iterator().next();
        if (taskNames.contains(taskName)) {
            throw new RuntimeException("Task name: \'" + taskName
                    + "\' appears more than once in the workflow. Each task name in the workflow must be unique");
        }
        taskNames.add(taskName);
        Map<String, Object> taskRawDataValue;
        String message = "Task: " + taskName
                + " syntax is illegal.\nBelow task name, there should be a map of values in the format:\ndo:\n\top_name:";
        try {
            taskRawDataValue = taskRawData.values().iterator().next();
            if (MapUtils.isNotEmpty(taskRawDataValue) && taskRawDataValue.containsKey(LOOP_KEY)) {
                message = "Task: " + taskName
                        + " syntax is illegal.\nBelow the 'loop' keyword, there should be a map of values in the format:\nfor:\ndo:\n\top_name:";
                taskRawDataValue.putAll((Map<String, Object>) taskRawDataValue.remove(LOOP_KEY));
            }
        } catch (ClassCastException ex) {
            throw new RuntimeException(message);
        }

        String defaultSuccess;
        if (nextTaskData != null) {
            defaultSuccess = nextTaskData.keySet().iterator().next();
        } else {
            defaultSuccess = onFailureSection ? FAILURE_RESULT : SUCCESS_RESULT;
        }
        Task task = compileTask(taskName, taskRawDataValue, defaultSuccess, imports, defaultFailure);
        tasks.add(task);
    }

    if (isOnFailureDefined) {
        tasks.addAll(onFailureWorkFlow.getTasks());
    }

    return new Workflow(tasks);
}

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From source file:org.openscore.lang.compiler.utils.ExecutableBuilder.java

private Workflow compileWorkFlow(LinkedHashMap<String, Map<String, Object>> workFlowRawData,
        Map<String, String> imports, Workflow onFailureWorkFlow, boolean onFailureSection) {

    Deque<Task> tasks = new LinkedList<>();

    Validate.notEmpty(workFlowRawData, "Flow must have tasks in its workflow");

    PeekingIterator<Map.Entry<String, Map<String, Object>>> iterator = new PeekingIterator<>(
            workFlowRawData.entrySet().iterator());

    boolean isOnFailureDefined = onFailureWorkFlow != null;

    String defaultFailure = isOnFailureDefined ? onFailureWorkFlow.getTasks().getFirst().getName()
            : FAILURE_RESULT;// w w w  .  j  av a 2  s  .  co m

    while (iterator.hasNext()) {
        Map.Entry<String, Map<String, Object>> taskRawData = iterator.next();
        Map.Entry<String, Map<String, Object>> nextTaskData = iterator.peek();
        String taskName = taskRawData.getKey();
        Map<String, Object> taskRawDataValue;
        try {
            taskRawDataValue = taskRawData.getValue();
        } catch (ClassCastException ex) {
            throw new RuntimeException("Task: " + taskName
                    + " syntax is illegal.\nBelow task name, there should be a map of values in the format:\ndo:\n\top_name:");
        }

        String defaultSuccess;
        if (nextTaskData != null) {
            defaultSuccess = nextTaskData.getKey();
        } else {
            defaultSuccess = onFailureSection ? FAILURE_RESULT : SUCCESS_RESULT;
        }
        Task task = compileTask(taskName, taskRawDataValue, defaultSuccess, imports, defaultFailure);
        tasks.add(task);
    }

    if (isOnFailureDefined) {
        tasks.addAll(onFailureWorkFlow.getTasks());
    }

    return new Workflow(tasks);
}

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From source file:org.openvpms.archetype.rules.workflow.FreeSlotIterators.java

/**
 * Gets the next iterator.//from w w w.j  av a2s.c  o m
 */
private void getNext() {
    next = null;
    ListIterator<PeekingIterator<Slot>> listIterator = iterators.listIterator();
    Date minDate = null;
    while (listIterator.hasNext()) {
        PeekingIterator<Slot> iterator = listIterator.next();
        if (!iterator.hasNext()) {
            listIterator.remove();
        } else {
            Slot slot = iterator.peek();
            if (minDate == null || DateRules.compareTo(minDate, slot.getStartTime()) > 0) {
                minDate = slot.getStartTime();
                next = iterator;
            }
        }
    }
}

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