Example usage for java.util Stack push

Introduction

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

Prototype

public E push(E item) 

Source Link

Document

Pushes an item onto the top of this stack.

Usage

From source file:ch.zhaw.icclab.tnova.expressionsolver.OTFlyEval.java

String evaluateExpression(String exp, Stack<Double> param, double threshold) {
    String[] literals = exp.split("(?!^)"); //array of characters
    String tempVal = "";
    Stack<String> sTable = new Stack<String>();
    for (int i = 0; i < literals.length; i++) {
        if (literals[i].equals("(")) {
            if (tempVal.trim().length() != 0) {
                sTable.push("fn " + tempVal.trim());
                logger.info("pushed function [" + tempVal.trim() + "] into stack.");
            } else {
                //parsing error this stage is not allowed
            }//from ww  w . j ava2s  . c  o  m
            tempVal = "";
        } else if (literals[i].equals(",")) {
            if (tempVal.trim().length() != 0) {
                sTable.push("pm " + tempVal.trim());
                logger.info("pushed parameter [" + tempVal.trim() + "] into stack.");
            } else {
                //parsing error this stage is not allowed
            }
            tempVal = "";
        } else if (literals[i].equals(")")) {
            if (tempVal.trim().length() != 0) {
                sTable.push("pm " + tempVal.trim());
                logger.info("pushed parameter [" + tempVal.trim() + "] into stack.");
            }

            logger.info("Proceeding for partial stack evaluation.");
            tempVal = "";
            //proceed to partial evaluation
            try {
                String output = partialEvaluation(sTable, param, threshold);
                //push the result back into stack as a literal
                sTable.push("pm " + output);
                logger.info("pushed parameter [" + output + "] into stack for further processing.");
            } catch (EmptyStackException emex) {
                logger.warn("Malformed expression and value set received.");
                if (App.showExceptions)
                    emex.printStackTrace();
                return null;
            }
        } else
            tempVal += literals[i];
    }
    //if stack has more than 1 element error, else the only element is the result
    String result = "";
    if (sTable.size() != 1) {
        //error
        result = null;
    } else {
        result = sTable.pop().split(" ")[1];
    }
    return result;
}

---

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/*from  w w  w  . j  a v a2  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:com.datastax.hectorjpa.spring.ConsistencyLevelAspect.java

/**
 * Validates any method that has the valid annotation on it and is wired as
 * a spring service/*from   www .  ja  v  a  2 s. 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:org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.ContainerLocalizer.java

private void createParentDirs(Path destDirPath) throws IOException {
    Path parent = destDirPath.getParent();
    Path cacheRoot = LocalCacheDirectoryManager.getCacheDirectoryRoot(parent);
    Stack<Path> dirs = new Stack<Path>();
    while (!parent.equals(cacheRoot)) {
        dirs.push(parent);
        parent = parent.getParent();/* w  ww .ja  v a  2s. c  om*/
    }
    // Create directories with user cache permission
    while (!dirs.isEmpty()) {
        createDir(lfs, dirs.pop(), USERCACHE_FOLDER_PERMS);
    }
}

---

From source file:edu.mit.lib.tools.Modernize.java

public void importToMds(String targetUrl) throws IOException {
    if (manif.isEmpty()) {
        manif.read();// ww  w  .  ja v a2s  . co m
    }
    Stack<String> parents = new Stack<>();
    parents.push(null); // indicates no parent object

    for (int i = 0; i < manif.entries.size(); i++) {
        String handle = manif.entries.get(i);
        uploadPackage(getPackage(handle), getPostUrl(targetUrl, parents.peek(), manif.ctypes.get(i)));
        if (i < manif.entries.size() - 1) {
            int diff = manif.levels.get(i) - manif.levels.get(i + 1);
            if (diff < 0) {
                // I have kids - put myself on the parents stack
                parents.push(handle);
            } else if (diff > 0) {
                // expose grandparents
                while (diff-- > 0) {
                    parents.pop();
                }
            } // if diff == 0 - next entry is a sibling, nothing to do
        }
    }
}

---

From source file:com.altoukhov.svsync.fileviews.SmbFileSpace.java

@Override
protected Snapshot scan(List<Pattern> filters) {
    try {//w w  w .j ava2s .  c  o  m
        Map<String, FileSnapshot> files = new LinkedHashMap<>();
        Set<String> dirs = new HashSet<>();

        SmbFile root = new SmbFile(rootPath, auth);
        if (root.exists()) {

            Stack<SmbFile> stack = new Stack<>();
            stack.push(root);
            dirs.add("");

            while (!stack.isEmpty()) {
                SmbFile currentFolder = stack.pop();

                for (final SmbFile file : listFiles(currentFolder)) {

                    String path = file.getPath();

                    boolean isFile = isFile(file);
                    boolean isDirectory = isDirectory(file);

                    if (isFile && !isExcluded(path) && !isFiltered(toRelativePath(path), filters)) {
                        FileSnapshot fileSnapshot = createFileSnapshot(file, path);
                        files.put(fileSnapshot.getRelativePath(), fileSnapshot);
                    } else if (isDirectory && !isExcluded(path)
                            && !isFiltered(toRelativePath(path, true), filters)) {
                        stack.push(file);
                        dirs.add(toRelativePath(path));
                        System.out.println("Scanning " + path);
                    }
                }
            }
        }
        Snapshot snapshot = new Snapshot(files, dirs);
        return snapshot;
    } catch (MalformedURLException | SmbException ex) {
        System.out.println("Failed to scan file space");
        System.out.println(ex.getMessage());
        System.out.println(ex);
    }

    return null;
}

---

From source file:com.webcohesion.ofx4j.io.nanoxml.TestNanoXMLOFXReader.java

/**
 * tests using sax to parse an OFX doc.//from  w ww .  j a va 2s  .  co  m
 */
public void testSimpleVersion1() throws Exception {
    NanoXMLOFXReader reader = new NanoXMLOFXReader();
    final Map<String, List<String>> headers = new HashMap<String, List<String>>();
    final Stack<Map<String, List<Object>>> aggregateStack = new Stack<Map<String, List<Object>>>();
    TreeMap<String, List<Object>> root = new TreeMap<String, List<Object>>();
    aggregateStack.push(root);

    reader.setContentHandler(getNewDefaultHandler(headers, aggregateStack));
    reader.parse(TestNanoXMLOFXReader.class.getResourceAsStream("simple.ofx"));
    assertEquals(9, headers.size());
    assertEquals(1, aggregateStack.size());
    assertSame(root, aggregateStack.pop());

    TreeMap<String, List<Object>> OFX = (TreeMap<String, List<Object>>) root.remove("OFX").get(0);
    assertNotNull(OFX);
    TreeMap<String, List<Object>> SIGNONMSGSRSV1 = (TreeMap<String, List<Object>>) OFX.remove("SIGNONMSGSRSV1")
            .get(0);
    assertNotNull(SIGNONMSGSRSV1);
    TreeMap<String, List<Object>> SONRS = (TreeMap<String, List<Object>>) SIGNONMSGSRSV1.remove("SONRS").get(0);
    assertNotNull(SONRS);
    TreeMap<String, List<Object>> STATUS = (TreeMap<String, List<Object>>) SONRS.remove("STATUS").get(0);
    assertNotNull(STATUS);
    assertEquals("0", STATUS.remove("CODE").get(0).toString().trim());
    assertEquals("INFO", STATUS.remove("SEVERITY").get(0).toString().trim());
    assertTrue(STATUS.isEmpty());
    assertEquals("20071015021529.000[-8:PST]", SONRS.remove("DTSERVER").get(0).toString().trim());
    assertEquals("ENG", SONRS.remove("LANGUAGE").get(0).toString().trim());
    assertEquals("19900101000000", SONRS.remove("DTACCTUP").get(0).toString().trim());
    assertTrue(SONRS.isEmpty());
    assertTrue(SIGNONMSGSRSV1.isEmpty());
    assertTrue(OFX.isEmpty());
    assertTrue(root.isEmpty());
}

---

From source file:aula1.Aula1.java

public static String calculaPolonesaINversa(String entrada, String info) {
    Stack<String> pilha = new Stack<>();
    Stack<Op> operadores = new Stack<>();
    String[] operadoresSuportados = { "+", "-", "*", "/", "^", "(", ")", "sen" };

    for (int i = 0; i < entrada.length(); i++) {
        String s = "";
        if (entrada.charAt(i) == 's') {

            if (entrada.contains("sen")) {
                int ind = entrada.indexOf("sen");
                ind += 2;//from  w w  w  . j a  v a 2  s. c o m
                i = 0;
                entrada = entrada.substring(ind + 1);
                s = "sen";
            }
        } else
            s = String.valueOf(entrada.charAt(i));
        if (Character.isDigit(entrada.charAt(i)) || entrada.charAt(i) == 'x') {
            if (Character.isDigit(entrada.charAt(i))) {
                s = String.valueOf(entrada.charAt(i));
                while (Character.isDigit(entrada.charAt(i + 1))) {
                    s += String.valueOf(entrada.charAt(i + 1));
                    i++;
                }
            }
            pilha.push(s);
        } else if (Arrays.asList(operadoresSuportados).contains(s)) {
            String n1 = "";
            String n2 = "";
            if (s.equals("sen"))
                n1 = pilha.pop();
            else {
                n1 = pilha.pop();
                n2 = pilha.pop();
            }
            String resultado;

            if (n1.equals("x"))
                n1 = info;
            else if (n2.equals("x"))
                n2 = info;
            try {
                switch (s) {
                case "+":
                    resultado = Operadores.soma(n2, n1);
                    pilha.push(resultado);
                    break;
                case "-":
                    resultado = Operadores.sub(n2, n1);
                    pilha.push(resultado);
                    break;
                case "*":
                    resultado = Operadores.M(n2, n1);
                    pilha.push(resultado);
                    break;
                case "/":
                    resultado = Operadores.D(n2, n1);
                    pilha.push(resultado);
                    break;
                case "^":
                    resultado = Operadores.pow(n2, n1);
                    pilha.push(resultado);
                    break;
                case "sen":
                    resultado = Operadores.sen(n1);
                    pilha.push(resultado);
                    break;
                }
            } catch (Exception e) {
                System.out.println("Erro: " + e.getMessage());
            }
        }
    }
    return pilha.peek();
}

---

From source file:com.webcohesion.ofx4j.io.nanoxml.TestNanoXMLOFXReader.java

/**
 * tests for closing tags in v1/*from w w  w. j  a va 2  s.co m*/
 */
public void testClosingTagsVersion1() throws Exception {
    NanoXMLOFXReader reader = new NanoXMLOFXReader();
    final Map<String, List<String>> headers = new HashMap<String, List<String>>();
    final Stack<Map<String, List<Object>>> aggregateStack = new Stack<Map<String, List<Object>>>();
    TreeMap<String, List<Object>> root = new TreeMap<String, List<Object>>();
    aggregateStack.push(root);

    reader.setContentHandler(getNewDefaultHandler(headers, aggregateStack));
    reader.parse(TestNanoXMLOFXReader.class.getResourceAsStream("closing-tags.ofx"));
    assertEquals(9, headers.size());
    assertEquals(1, aggregateStack.size());
    assertSame(root, aggregateStack.pop());

    TreeMap<String, List<Object>> OFX = (TreeMap<String, List<Object>>) root.remove("OFX").get(0);
    assertNotNull(OFX);
    TreeMap<String, List<Object>> SIGNONMSGSRSV1 = (TreeMap<String, List<Object>>) OFX.remove("SIGNONMSGSRSV1")
            .get(0);
    assertNotNull(SIGNONMSGSRSV1);
    TreeMap<String, List<Object>> SONRS = (TreeMap<String, List<Object>>) SIGNONMSGSRSV1.remove("SONRS").get(0);
    assertNotNull(SONRS);
    TreeMap<String, List<Object>> STATUS = (TreeMap<String, List<Object>>) SONRS.remove("STATUS").get(0);
    assertNotNull(STATUS);
    TreeMap<String, List<Object>> FI = (TreeMap<String, List<Object>>) SONRS.remove("FI").get(0);
    assertNotNull(FI);
    assertEquals("0", STATUS.remove("CODE").get(0).toString().trim());
    assertEquals("INFO", STATUS.remove("SEVERITY").get(0).toString().trim());
    assertTrue(STATUS.isEmpty());
    assertEquals("20100717152132", SONRS.remove("DTSERVER").get(0).toString().trim());
    assertEquals("ENG", SONRS.remove("LANGUAGE").get(0).toString().trim());
    assertEquals("ameritrade.com", FI.remove("ORG").get(0).toString().trim());
    assertTrue(SONRS.isEmpty());
    assertTrue(SIGNONMSGSRSV1.isEmpty());
    assertTrue(OFX.isEmpty());
    assertTrue(root.isEmpty());
}

---

From source file:DOM2SAX.java

/**
 * Begin the scope of namespace prefix. Forward the event to the SAX handler
 * only if the prefix is unknown or it is mapped to a different URI.
 *//*w  ww.j a  va  2s.c om*/
private boolean startPrefixMapping(String prefix, String uri) throws SAXException {
    boolean pushed = true;
    Stack uriStack = (Stack) prefixes.get(prefix);

    if (uriStack != null) {
        if (uriStack.isEmpty()) {
            contentHandler.startPrefixMapping(prefix, uri);
            uriStack.push(uri);
        } else {
            final String lastUri = (String) uriStack.peek();
            if (!lastUri.equals(uri)) {
                contentHandler.startPrefixMapping(prefix, uri);
                uriStack.push(uri);
            } else {
                pushed = false;
            }
        }
    } else {
        contentHandler.startPrefixMapping(prefix, uri);
        uriStack = new Stack();
        prefixes.put(prefix, uriStack);
        uriStack.push(uri);
    }
    return pushed;
}

---

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