Java Deque.getFirst方法代码示例

import java.util.Deque; //导入方法依赖的package包/类
@Override
public String readAttribute(final HttpServerExchange exchange) {
    Deque<String> res = exchange.getPathParameters().get(parameter);
    if(res == null) {
        return null;
    }else if(res.isEmpty()) {
        return "";
    } else if(res.size() ==1) {
        return res.getFirst();
    } else {
        StringBuilder sb = new StringBuilder("[");
        int i = 0;
        for(String s : res) {
            sb.append(s);
            if(++i != res.size()) {
                sb.append(", ");
            }
        }
        sb.append("]");
        return sb.toString();
    }
}
 

import java.util.Deque; //导入方法依赖的package包/类
/**
 * Called to identify a transformer that cannot be used during working out
 * available transformers.
 */
public void unavailableTransformer(ContentTransformer transformer, String sourceMimetype, String targetMimetype, long maxSourceSizeKBytes)
{
    if (isEnabled())
    {
        Deque<Frame> ourStack = ThreadInfo.getStack();
        Frame frame = ourStack.peek();

        if (frame != null)
        {
            Deque<String> isTransformableStack = ThreadInfo.getIsTransformableStack();
            String name = (!isTransformableStack.isEmpty())
                ? isTransformableStack.getFirst()
                : getName(transformer);
            boolean debug = (maxSourceSizeKBytes != 0);
            if (frame.unavailableTransformers == null)
            {
                frame.unavailableTransformers = new TreeSet<UnavailableTransformer>();
            }
            String priority = gePriority(transformer, sourceMimetype, targetMimetype);
            frame.unavailableTransformers.add(new UnavailableTransformer(name, priority, maxSourceSizeKBytes, debug));
        }
    }
}
 

import java.util.Deque; //导入方法依赖的package包/类
@SuppressWarnings("deprecation")
public void doAuthorize(HttpServerExchange exchange) throws  ServerError{
	Map<String, Deque<String>> queryParams = exchange.getQueryParameters();
       Deque<String> parameter = queryParams.get("apiKey");
       String apiKey = parameter.getFirst();

       
	String path = exchange.getRequestPath();
	String threescaleMethod = getThreescaleMethodName(path);
	
	AuthorizeResponse auth = pluginService.authRep(apiKey, threescaleMethod);

	if (auth!=null && (!auth.success())){
		//TODO find non-deprecated way of doing this.
		exchange.setResponseCode(403);
   	}
}
 

import java.util.Deque; //导入方法依赖的package包/类
@Override
public String readAttribute(final HttpServerExchange exchange) {
    Deque<String> res = exchange.getQueryParameters().get(parameter);
    if(res == null) {
        return null;
    }else if(res.isEmpty()) {
        return "";
    } else if(res.size() ==1) {
        return res.getFirst();
    } else {
        StringBuilder sb = new StringBuilder("[");
        int i = 0;
        for(String s : res) {
            sb.append(s);
            if(++i != res.size()) {
                sb.append(", ");
            }
        }
        sb.append("]");
        return sb.toString();
    }
}
 

import java.util.Deque; //导入方法依赖的package包/类
@Override
public String getParameter(final String name) {
    if(queryParameters == null) {
        queryParameters = exchange.getQueryParameters();
    }
    Deque<String> params = queryParameters.get(name);
    if (params == null) {
        if (exchange.getRequestMethod().equals(Methods.POST)) {
            final FormData parsedFormData = parseFormData();
            if (parsedFormData != null) {
                FormData.FormValue res = parsedFormData.getFirst(name);
                if (res == null || res.isFile()) {
                    return null;
                } else {
                    return res.getValue();
                }
            }
        }
        return null;
    }
    return params.getFirst();
}
 

import java.util.Deque; //导入方法依赖的package包/类
private PathDrawer(GoogleMap map,
                   Deque<PathCreator.DistanceFrom> path,
                   BitmapDescriptor firstNodeIcon,
                   BitmapDescriptor middleNodeIcon,
                   BitmapDescriptor lastNodeIcon) {

    this.map = map;
    this.path = new ArrayDeque<>();
    this.path.addAll(path);
    last = path.getFirst();
    this.firstNodeIcon = firstNodeIcon;
    this.middleNodeIcon = middleNodeIcon;
    this.lastNodeIcon = lastNodeIcon;
    this.isFirstPop = true;
}
 

import java.util.Deque; //导入方法依赖的package包/类
@Override
public String findSessionId(final HttpServerExchange exchange) {
    Deque<String> stringDeque = exchange.getPathParameters().get(name);
    if (stringDeque == null) {
        return null;
    }
    return stringDeque.getFirst();
}
 

import java.util.Deque; //导入方法依赖的package包/类
/**
 * Test if the  waiter that is waiting on availability of more memory is cleaned up when an interruption occurs
 */
@Test
public void testCleanupMemoryAvailabilityWaiterOnInterruption() throws Exception {
    BufferPool pool = new BufferPool(2, 1, metrics, time, metricGroup);
    long blockTime = 5000;
    pool.allocate(1, maxBlockTimeMs);
    Thread t1 = new Thread(new BufferPoolAllocator(pool, blockTime));
    Thread t2 = new Thread(new BufferPoolAllocator(pool, blockTime));
    // start thread t1 which will try to allocate more memory on to the Buffer pool
    t1.start();
    // sleep for 500ms. Condition variable c1 associated with pool.allocate() by thread t1 will be inserted in the waiters queue.
    Thread.sleep(500);
    Deque<Condition> waiters = pool.waiters();
    // get the condition object associated with pool.allocate() by thread t1
    Condition c1 = waiters.getFirst();
    // start thread t2 which will try to allocate more memory on to the Buffer pool
    t2.start();
    // sleep for 500ms. Condition variable c2 associated with pool.allocate() by thread t2 will be inserted in the waiters queue. The waiters queue will have 2 entries c1 and c2.
    Thread.sleep(500);
    t1.interrupt();
    // sleep for 500ms.
    Thread.sleep(500);
    // get the condition object associated with allocate() by thread t2
    Condition c2 = waiters.getLast();
    t2.interrupt();
    assertNotEquals(c1, c2);
    t1.join();
    t2.join();
    // both the allocate() called by threads t1 and t2 should have been interrupted and the waiters queue should be empty
    assertEquals(pool.queued(), 0);
}
 

import java.util.Deque; //导入方法依赖的package包/类
public void print(TreeNode root) {
	
	if (root == null)
		return;
	
	Deque<TreeNode> queue = new ArrayDeque<>();
	queue.addLast(root);
	int nextLevel = 0;
	int toBePrinted = 1;
	while (!queue.isEmpty()) {
		TreeNode node = queue.getFirst();
		System.out.print(node.val + " ");
		if (node.left != null) {
			queue.addLast(node.left);
			++nextLevel;
		}
		if (node.right != null) {
			queue.addLast(node.right);
			++nextLevel;
		}
		
		queue.pop();
		--toBePrinted;
		if (toBePrinted == 0) {
			System.out.println();
			toBePrinted = nextLevel;
			nextLevel = 0;
		}
	}
}