Example usage for java.util Map isEmpty

Introduction

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

Prototype

boolean isEmpty();

Source Link

Document

Returns true if this map contains no key-value mappings.

Usage

From source file:info.archinnov.achilles.internal.validation.Validator.java

public static void validateNotEmpty(Map<?, ?> arg, String message, Object... args) {
    if (arg == null || arg.isEmpty()) {
        throw new AchillesException(format(message, args));
    }//from  w  w  w  .  jav  a 2s  .  co  m
}

From source file:com.zotoh.maedr.device.netty.NettpHplr.java

private static void getParams(HttpEvent ev, String uri) {

    QueryStringDecoder dec = new QueryStringDecoder(uri);
    Map<String, List<String>> params = dec.getParameters();

    if (!params.isEmpty()) {
        for (Entry<String, List<String>> p : params.entrySet()) {
            ev.addParam(p.getKey(), p.getValue().toArray(new String[0]));
        }/*from   w ww .j av  a  2 s .  c  o m*/
    }

}

From source file:io.parallec.core.util.PcStringUtils.java

/**
 * Str map to str./* w  w  w .j a v a  2  s  .  c om*/
 *
 * @param map
 *            the map
 * @return the string
 */
public static String strMapToStr(Map<String, String> map) {

    StringBuilder sb = new StringBuilder();

    if (map == null || map.isEmpty())
        return sb.toString();

    for (Entry<String, String> entry : map.entrySet()) {

        sb.append("< " + entry.getKey() + ", " + entry.getValue() + "> ");
    }
    return sb.toString();

}

From source file:Main.java

/**
 * Determine if the contents of two maps are the same, i.e. the same keys are mapped to the same values in both maps.
 * @param a the first {@link Map}/* w w  w  . ja va  2 s .c  o m*/
 * @param b the secound {@link Map}
 * @return <code>true</code> if the contents are the same, <code>false</code> otherwise.
 */
public static <K, V> boolean equalContents(Map<? extends K, ? extends V> a, Map<? extends K, ? extends V> b) {
    if (a == b) {
        return true;
    } else if (a.isEmpty() && b.isEmpty()) {
        return true;
    }
    if (a.size() != b.size()) {
        return false;
    } else {

        for (Map.Entry entryA : a.entrySet()) {

            if (!b.containsKey(entryA.getKey()) || !b.get(entryA.getKey()).equals(entryA.getValue())) {
                return false;
            }

        }

        return true;
    }

}

From source file:com.exxonmobile.ace.hybris.storefront.servlets.util.FilterSpringUtil.java

/**
 * The same as {@link #getSpringBean(HttpServletRequest, String, Class)} but uses ServletContext as the first
 * parameter. It might be used in places, where HttpServletRequest is not available, but ServletContext is.
 *//*w w  w .  jav  a 2 s. c o  m*/
public static <T> T getSpringBean(final ServletContext servletContext, final String beanName,
        final Class<T> beanClass) {
    T ret = null;
    final WebApplicationContext appContext = WebApplicationContextUtils
            .getRequiredWebApplicationContext(servletContext);

    if (StringUtils.isNotBlank(beanName)) {
        try {
            ret = (T) appContext.getBean(beanName);
        } catch (final NoSuchBeanDefinitionException ex) {
            LOG.warn("No bean found with the specified name. Trying to resolve bean using type...");
        }
    }
    if (ret == null) {
        if (beanClass == null) {
            LOG.warn("No bean could be resolved. Reason: No type specified.");
        } else {
            final Map<String, T> beansOfType = appContext.getBeansOfType(beanClass);
            if (beansOfType != null && !beansOfType.isEmpty()) {
                if (beansOfType.size() > 1) {
                    LOG.warn("More than one matching bean found of type " + beanClass.getSimpleName()
                            + ". Returning the first one found.");
                }
                ret = beansOfType.values().iterator().next();
            }
        }
    }
    return ret;
}

From source file:com.acc.filter.FilterSpringUtil.java

/**
 * The same as {@link #getSpringBean(HttpServletRequest, String, Class)} but uses ServletContext as the first
 * parameter. It might be used in places, where HttpServletRequest is not available, but ServletContext is.
 *//*from  w  ww  .  ja va  2 s.c  o  m*/
public static <T> T getSpringBean(final ServletContext servletContext, final String beanName,
        final Class<T> beanClass) {
    T ret = null;
    final WebApplicationContext appContext = WebApplicationContextUtils
            .getRequiredWebApplicationContext(servletContext);

    if (StringUtils.isNotBlank(beanName)) {
        try {
            ret = (T) appContext.getBean(beanName);
        } catch (final NoSuchBeanDefinitionException nsbde) {
            LOG.warn("No bean found with the specified name. Trying to resolve bean using type...");
        }
    }
    if (ret == null) {
        if (beanClass == null) {
            LOG.warn("No bean could be resolved. Reason: No type specified.");
        } else {
            final Map<String, T> beansOfType = appContext.getBeansOfType(beanClass);
            if (beansOfType != null && !beansOfType.isEmpty()) {
                if (beansOfType.size() > 1) {
                    LOG.warn("More than one matching bean found of type " + beanClass.getSimpleName()
                            + ". Returning the first one found.");
                }
                ret = beansOfType.values().iterator().next();
            }
        }
    }
    return ret;
}

From source file:Main.java

/**
 * Returns the ordered keys of the given map
 * /*w w w. j  ava2 s . co m*/
 * @param map
 *            the map
 * @return the ordered keys
 */
public final static List<String> getOrderedKeys(final Map<String, Object> map) {
    List<String> keys = new LinkedList<String>();
    if (!map.isEmpty()) {
        keys.addAll(map.keySet());
        Collections.sort(keys, new Comparator<String>() {
            /**
             * {@inheritDoc}
             */
            public int compare(String o1, String o2) {
                if (o1 == o2) {
                    return 0;
                }
                int n1 = -1;
                int n2 = -1;
                try {
                    n1 = Integer.parseInt(o1.substring(1));
                } catch (NumberFormatException e) {
                    // IGNORE
                }
                try {
                    n2 = Integer.parseInt(o2.substring(1));
                } catch (NumberFormatException e) {
                    // IGNORE
                }
                /*
                 * n1 is a number
                 */
                if (n1 != -1) {
                    /*
                     * n2 is a number
                     */
                    if (n2 != -1) {
                        return n1 - n2;
                    }
                    /*
                     * n2 is a string literal
                     */
                    return -1;
                }
                /*
                 * n1 is a literal and n2 is a number
                 */
                if (n2 != -1) {
                    return -1;
                }
                /*
                 * both are literals
                 */
                return o1.compareTo(o2);
            }
        });
    }
    return keys;
}

From source file:edu.mayo.cts2.framework.webapp.rest.view.jsp.Beans.java

private static Map returnSummary(Map summary, Object bean) {
    if (summary.isEmpty()) {
        summary.put("Entry", bean.getClass().getSimpleName());
    }// w  w w.j av a  2  s.  c om

    return summary;
}

From source file:org.apache.calcite.adapter.elasticsearch.ElasticsearchSchemaFactory.java

/**
 * Builds elastic rest client from user configuration
 * @param coordinates list of {@code hostname/port} to connect to
 * @return newly initialized low-level rest http client for ES
 *//*from w ww.  j a  va 2s .com*/
private static RestClient connect(Map<String, Integer> coordinates) {
    Objects.requireNonNull(coordinates, "coordinates");
    Preconditions.checkArgument(!coordinates.isEmpty(), "no ES coordinates specified");
    final Set<HttpHost> set = new LinkedHashSet<>();
    for (Map.Entry<String, Integer> entry : coordinates.entrySet()) {
        set.add(new HttpHost(entry.getKey(), entry.getValue()));
    }

    return RestClient.builder(set.toArray(new HttpHost[0])).build();
}

From source file:net.logstash.logback.composite.JsonWritingUtils.java

/**
 * Writes a map as String fields to the generator if and only if the fieldName and values are not null.
 *///  www  .j  a  v a 2  s .c o  m
public static void writeMapStringFields(JsonGenerator generator, String fieldName, Map<String, String> map)
        throws IOException, JsonMappingException {
    if (shouldWriteField(fieldName) && map != null && !map.isEmpty()) {
        generator.writeObjectFieldStart(fieldName);
        for (Map.Entry<String, String> entry : map.entrySet()) {
            writeStringField(generator, entry.getKey(), entry.getValue());
        }
        generator.writeEndObject();
    }
}