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:Main.java

public static String build(Map<String, String> conditions) {
    if (conditions.isEmpty()) {
        return null;
    }// w  w w.j  a  v  a2s.  co  m
    StringBuilder conditionBuilder = new StringBuilder();
    int count = 0;
    for (Map.Entry<String, String> condition : conditions.entrySet()) {
        conditionBuilder.append(condition.getKey());
        conditionBuilder.append("=");
        conditionBuilder.append(condition.getValue());
        if (count < conditions.entrySet().size() - 1) {
            conditionBuilder.append("&");
        }
        count++;
    }
    return conditionBuilder.toString();
}

From source file:Main.java

public static String generateQueryJson(Map<String, String> params) {

    if (params == null || params.isEmpty())
        return "";

    JSONObject aJsonObject = new JSONObject(params);
    return aJsonObject.toString();
}

From source file:Main.java

/**
 * return map is empty/*from  w w w  .  ja  v  a2s  . com*/
 * @param map
 * @return
 */
public static <K, V> boolean isEmpty(Map<K, V> map) {
    return (null == map || map.isEmpty());
}

From source file:Main.java

public static boolean isEmpty(final Map<?, ?> map) {
    return (map == null || map.isEmpty());
}

From source file:Main.java

public static <K, V> boolean isNullOrEmpty(Map<K, V> map) {
    if ((map == null) || map.isEmpty()) {
        return true;
    }/* w  ww .  j  av a 2s.  com*/

    return false;
}

From source file:Main.java

public static boolean isNullOrEmpty(Map<?, ?> map) {
    return (map == null || map.isEmpty());
}

From source file:Main.java

/**
 * Checks if map is null or empty// w w w. j  av a 2 s.c om
 *
 * @param source map to check
 * @return true if map is null or empty
 */
private static boolean isEmpty(Map source) {
    return source == null || source.isEmpty();
}

From source file:Main.java

public static <V> Map<String, V> cleanupMap(Map<String, V> map) {
    if (map == null || map.isEmpty()) {
        return null;
    }/*from  ww  w .  j a  va2s .  c o  m*/

    Map<String, V> result = new HashMap<String, V>(map.size());
    Set<Entry<String, V>> entries = map.entrySet();

    for (Entry<String, V> entry : entries) {
        if (entry.getValue() != null) {
            result.put(entry.getKey(), entry.getValue());
        }
    }

    return result;
}

From source file:Main.java

/**
 * @param c/*  www .  j  a v a2 s. c om*/
 * @return
 */
public static boolean isEmpty(final Map<?, ?> c) {
    return c == null || c.isEmpty();
}

From source file:Main.java

public static boolean isEmpty(Map<Object, Object> map) {
    return (map == null || map.isEmpty());
}