Example usage for java.util Map clear

Introduction

In this page you can find the example usage for java.util Map clear.

Prototype

void clear();

Source Link

Document

Removes all of the mappings from this map (optional operation).

Usage

From source file:Main.java

public static void clear(final Map<?, ?> map) {
    if (isNotEmpty(map)) {
        map.clear();
    }/*from  w w w.  j  a  v a 2s  .  c o  m*/
}

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From source file:net.sf.jabb.util.text.test.KeywordMatcherExample.java

static public KeywordMatcher showExample(KeywordMatcher m) {
    if (m == null) {
        Map<String, Object> keywords = new HashMap<String, Object>();

        keywords.clear();
        keywords.put("", "");
        keywords.put("", "");
        keywords.put("?", "?");
        keywords.put("", "");
        keywords.put("", "");
        keywords.put("", "");
        keywords.put("", "");
        keywords.put("", "");
        keywords.put("", "");
        keywords.put("", "?");

        System.out.println("*** ? *******");
        for (String w : keywords.keySet()) {
            System.out.format("\t %-15s ---> %s\n", w, keywords.get(w));
        }/*from w  ww . ja v a  2 s . co  m*/
        System.out.println();

        m = new KeywordMatcher(keywords);

    }
    String s = "1949101\n"
            + "???\n"
            + "?";
    System.out.println("***  *******");
    System.out.println(s);
    System.out.println();

    Map<Object, MutableInt> result = m.match(s);

    System.out.println("***  *******");
    for (Object o : result.keySet()) {
        System.out.format("\t %-15s ===> %d\n", o, result.get(o).intValue());
    }
    System.out.println();
    return m;
}

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From source file:Main.java

/**
 * create a child process with environment variables
 * @param command/*from ww  w  .jav  a 2s  .  c o m*/
 * @param envVars
 * @return
 * @throws InterruptedException
 * @throws IOException
 */
public static String execUnixCommand(String[] command, Map<String, String> envVars)
        throws InterruptedException, IOException {

    /*
    ProcessBuilder processBuilder = new ProcessBuilder(command);
            
    if ( envVars != null ){
    Map<String, String> env = processBuilder.environment();
    env.clear();
    env.putAll(envVars);
    }
            
    Process process = processBuilder.start();
    processBuilder.redirectErrorStream(false);
    process.waitFor();
    String outputWithError = loadStream(process.getInputStream()) + loadStream(process.getErrorStream());
    return outputWithError;
     */

    ProcessBuilder processBuilder = new ProcessBuilder(command);

    if (envVars != null) {
        Map<String, String> env = processBuilder.environment();
        env.clear();
        env.putAll(envVars);
    }
    Process process = processBuilder.start();
    String output = loadStream(process.getInputStream());
    String error = loadStream(process.getErrorStream());
    process.waitFor();
    return output + "\n" + error;
}

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From source file:it.geosolutions.geoserver.jms.impl.utils.BeanUtils.java

/**
 * This is a 'smart' (perform checks for some special cases) update function which should be used to copy of the properties for objects
 * of the catalog and configuration.//from   www. j  ava 2s.c om
 * 
 * @param <T> the type of the bean to update
 * @param info the bean instance to update
 * @param properties the list of string of properties to update
 * @param values the list of new values to update
 * 
 * @throws IllegalAccessException
 * @throws InvocationTargetException
 * @throws NoSuchMethodException
 */
public static <T> void smartUpdate(final T info, final List<String> properties, final List<Object> values)
        throws IllegalAccessException, InvocationTargetException, NoSuchMethodException {
    final Iterator<String> itPropertyName = properties.iterator();
    final Iterator<Object> itValue = values.iterator();
    while (itPropertyName.hasNext() && itValue.hasNext()) {
        String propertyName = itPropertyName.next();
        final Object value = itValue.next();

        PropertyDescriptor pd = PropertyUtils.getPropertyDescriptor(info, propertyName);
        // return null if there is no such descriptor
        if (pd == null) {
            // this is a special case used by the NamespaceInfoImpl setURI
            // the propertyName coming from the ModificationProxy is set to 'uRI'
            // lets set it to uri
            propertyName = propertyName.toUpperCase();
            pd = PropertyUtils.getPropertyDescriptor(info, propertyName);
            if (pd == null) {
                return;
            }
        }
        if (pd.getWriteMethod() != null) {
            PropertyUtils.setProperty(info, propertyName, value);
        } else {
            // T interface do not declare setter method for this property
            // lets use getter methods to get the property reference
            final Object property = PropertyUtils.getProperty(info, propertyName);

            // check type of property to apply new value
            if (Collection.class.isAssignableFrom(pd.getPropertyType())) {
                final Collection<?> liveCollection = (Collection<?>) property;
                liveCollection.clear();
                liveCollection.addAll((Collection) value);
            } else if (Map.class.isAssignableFrom(pd.getPropertyType())) {
                final Map<?, ?> liveMap = (Map<?, ?>) property;
                liveMap.clear();
                liveMap.putAll((Map) value);
            } else {
                if (CatalogUtils.LOGGER.isLoggable(java.util.logging.Level.SEVERE))
                    CatalogUtils.LOGGER.severe("Skipping unwritable property " + propertyName
                            + " with property type " + pd.getPropertyType());
            }
        }
    }
}

---

From source file:Main.java

/**
 * Assign or make new map from source map. Use HashMap for new map.
 * /*w  w w. j a v  a2  s.  c o m*/
 * @param src
 *            source map
 * @param dst
 *            destination map
 * @return dst or new map if dst null
 */
public static <K, V> Map<K, V> instanceMap(Map<K, V> src, Map<K, V> dst) {
    Map<K, V> ret = null;
    if (src != null) {
        if (dst == null) {
            dst = new HashMap<>();
        }
        dst.clear();
        dst.putAll(src);
        ret = dst;
    }
    return ret;
}

---

From source file:Main.java

/**
 * Returns map with rendering hints from a Graphics instance.
 *
 * @param g2d         Graphics instance/*w w  w  . j  a va  2s .c om*/
 * @param hintsToSave map of RenderingHint key-values
 * @param savedHints  map to save hints into
 * @return map with rendering hints from a Graphics instance
 */
private static Map getRenderingHints(final Graphics2D g2d, final Map hintsToSave, Map savedHints) {
    if (savedHints == null) {
        savedHints = new RenderingHints(null);
    } else {
        savedHints.clear();
    }
    if (hintsToSave == null || hintsToSave.size() == 0) {
        return savedHints;
    }
    final Set objects = hintsToSave.keySet();
    for (final Object o : objects) {
        final RenderingHints.Key key = (RenderingHints.Key) o;
        final Object value = g2d.getRenderingHint(key);
        if (value != null) {
            savedHints.put(key, value);
        }
    }
    return savedHints;
}

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From source file:eu.aniketos.ncvm.impl.EncodeSupport.java

static Map<String, String> LoadKeyValueFile(String file) throws IOException {
    Map<String, String> keyValues = new HashMap<String, String>();
    keyValues.clear();

    BundleContext context = Activator.getContext();
    // Load data from the configuration file if there is one
    System.out.println("Reading key-value pairs from: " + file);
    URL configURL = context.getBundle().getEntry(file);
    if (configURL != null) {
        // Read the key value pairs
        BufferedReader input = new BufferedReader(new InputStreamReader(configURL.openStream()));
        try {//from   ww w .j ava  2s.c  om
            String read = "";
            while (read != null) {
                read = input.readLine();
                // Skip comments and blank lines
                if ((read != null) && (!read.isEmpty()) && (!read.startsWith("#"))) {
                    // Read in the key-value pair
                    int separator = read.indexOf('=');
                    if (separator >= 0) {
                        String key = read.substring(0, separator).trim().toLowerCase();
                        String value = read.substring(separator + 1).trim();
                        // Store the result in our map
                        keyValues.put(key, value);
                    }
                }
            }
        } finally {
            input.close();
        }
    }

    return keyValues;
}

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From source file:Main.java

/**
 * Remove parameters from a uri.// www. j av a  2s  .  c om
 * Passed in parameters map will be populated with parameter names as keys and
 * parameter values as map values. Values are of type String array
 * (similarly to {@link javax.servlet.ServletRequest#getParameterMap()}).
 * 
 * @param uri The uri path to deparameterize.
 * @param parameters The map that collects parameters.
 * @return The cleaned uri
 */
public static String deparameterize(String uri, Map parameters) {
    int i = uri.lastIndexOf('?');
    if (i == -1) {
        return uri;
    }

    parameters.clear();
    String[] params = uri.substring(i + 1).split("&");
    for (int j = 0; j < params.length; j++) {
        String p = params[j];
        int k = p.indexOf('=');
        if (k == -1) {
            break;
        }
        String name = p.substring(0, k);
        String value = p.substring(k + 1);
        Object values = parameters.get(name);
        if (values == null) {
            parameters.put(name, new String[] { value });
        } else {
            String[] v1 = (String[]) values;
            String[] v2 = new String[v1.length + 1];
            System.arraycopy(v1, 0, v2, 0, v1.length);
            v2[v1.length] = value;
            parameters.put(name, v2);
        }
    }

    return uri.substring(0, i);
}

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From source file:com.prowidesoftware.deprecation.DeprecationUtils.java

/**
 * Helper hack to set environment variables from Java code
 *//*from   w w w  .j a va  2s  . c om*/
@SuppressWarnings({ "unchecked", "rawtypes" })
private static void setEnv(final String key, final String value) {
    try {
        Class<?> processEnvironmentClass = Class.forName("java.lang.ProcessEnvironment");
        Field theEnvironmentField = processEnvironmentClass.getDeclaredField("theEnvironment");
        theEnvironmentField.setAccessible(true);
        Map<String, String> env = (Map<String, String>) theEnvironmentField.get(null);
        env.put(key, value);
        Field theCaseInsensitiveEnvironmentField = processEnvironmentClass
                .getDeclaredField("theCaseInsensitiveEnvironment");
        theCaseInsensitiveEnvironmentField.setAccessible(true);
        Map<String, String> cienv = (Map<String, String>) theCaseInsensitiveEnvironmentField.get(null);
        cienv.put(key, value);
    } catch (NoSuchFieldException e) {
        try {
            Class[] classes = Collections.class.getDeclaredClasses();
            Map<String, String> env = System.getenv();
            for (Class cl : classes) {
                if ("java.util.Collections$UnmodifiableMap".equals(cl.getName())) {
                    Field field = cl.getDeclaredField("m");
                    field.setAccessible(true);
                    Object obj = field.get(env);
                    Map<String, String> map = (Map<String, String>) obj;
                    map.clear();
                    map.put(key, value);
                }
            }
        } catch (Exception e2) {
            e2.printStackTrace();
        }
    } catch (Exception e1) {
        e1.printStackTrace();
    }
}

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From source file:com.sixt.service.framework.servicetest.helper.DockerComposeHelper.java

@SuppressWarnings("unchecked")
private static void setEnv(Map<String, String> newEnv) {
    try {/*  w  w  w  .ja  v  a  2s  . c o m*/
        Class<?> processEnvironmentClass = Class.forName("java.lang.ProcessEnvironment");
        Field theEnvironmentField = processEnvironmentClass.getDeclaredField("theEnvironment");
        theEnvironmentField.setAccessible(true);
        Map<String, String> env = (Map<String, String>) theEnvironmentField.get(null);
        env.putAll(newEnv);
        Field theCaseInsensitiveEnvironmentField = processEnvironmentClass
                .getDeclaredField("theCaseInsensitiveEnvironment");
        theCaseInsensitiveEnvironmentField.setAccessible(true);
        Map<String, String> cienv = (Map<String, String>) theCaseInsensitiveEnvironmentField.get(null);
        cienv.putAll(newEnv);
    } catch (NoSuchFieldException e) {
        try {
            Class[] classes = Collections.class.getDeclaredClasses();
            Map<String, String> env = System.getenv();
            for (Class cl : classes) {
                if ("java.util.Collections$UnmodifiableMap".equals(cl.getName())) {
                    Field field = cl.getDeclaredField("m");
                    field.setAccessible(true);
                    Object obj = field.get(env);
                    Map<String, String> map = (Map<String, String>) obj;
                    map.clear();
                    map.putAll(newEnv);
                }
            }
        } catch (Exception e2) {
            e2.printStackTrace();
        }
    } catch (Exception e1) {
        e1.printStackTrace();
    }
}

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