Example usage for java.lang Class getComponentType

Introduction

In this page you can find the example usage for java.lang Class getComponentType.

Prototype

public Class<?> getComponentType() 

Source Link

Document

Returns the Class representing the component type of an array.

Usage

From source file:com.discovery.darchrow.lang.ClassUtil.java

/**
 *  class info map for LOGGER.//from   w  ww .j  ava 2  s  .c o  m
 *
 * @param klass
 *            the clz
 * @return the map for log
 */
public static Map<String, Object> getClassInfoMapForLog(Class<?> klass) {
    if (Validator.isNullOrEmpty(klass)) {
        return null;
    }

    Map<String, Object> map = new LinkedHashMap<String, Object>();

    map.put("clz.getCanonicalName()", klass.getCanonicalName());//"com.feilong.core.date.DatePattern"
    map.put("clz.getName()", klass.getName());//"com.feilong.core.date.DatePattern"
    map.put("clz.getSimpleName()", klass.getSimpleName());//"DatePattern"

    map.put("clz.getComponentType()", klass.getComponentType());
    // ?? voidboolean?byte?char?short?int?long?float  double?
    map.put("clz.isPrimitive()", klass.isPrimitive());

    // ??,
    map.put("clz.isLocalClass()", klass.isLocalClass());
    // ????,??????
    map.put("clz.isMemberClass()", klass.isMemberClass());

    //isSynthetic()?Class????java??false?trueJVM???java??????
    map.put("clz.isSynthetic()", klass.isSynthetic());
    map.put("clz.isArray()", klass.isArray());
    map.put("clz.isAnnotation()", klass.isAnnotation());

    //??true
    map.put("clz.isAnonymousClass()", klass.isAnonymousClass());
    map.put("clz.isEnum()", klass.isEnum());

    return map;
}

---

From source file:Mopex.java

/**
 * Returns a syntactically correct name for a class object. If the class
 * object represents an array, the proper number of square bracket pairs are
 * appended to the component type.//from ww w .  java2s .c o m
 * 
 * @return java.lang.String
 * @param cls
 *            java.lang.Class
 */
//start extract classNameToString
public static String getTypeName(Class cls) {
    if (!cls.isArray()) {
        return cls.getName();
    } else {
        return getTypeName(cls.getComponentType()) + "[]";
    }
}

---

From source file:net.sf.json.JSONUtils.java

/**
 * DOCUMENT ME!/*w  w w  .  j  av a 2 s.co m*/
 *
 * @param type DOCUMENT ME!
 *
 * @return DOCUMENT ME!
 */
public static Class getInnerComponentType(Class type) {
    if (!type.isArray()) {
        return type;
    }

    return getInnerComponentType(type.getComponentType());
}

---

From source file:com.alibaba.doris.admin.service.impl.ValueParseUtil.java

/**
 * ?String ?://from w  w w . j  a  va 2s. c om
 * 
 * <pre>
 * short, int, long, float : 0
 * char, byte: 0
 * String: null
 * Map, List: null
 * Integer, Long, Float : null
 * Date: null
 * array: null
 * </pre>
 * 
 * @param strValue
 * @param clazz
 * @return
 */
@SuppressWarnings("unchecked")
public static <T> T parseStringValue(String strValue, Class<T> clazz, boolean autoDefault) {

    if (DEF_NULL.equals(strValue)) {
        if (!clazz.isPrimitive()) {
            return null;
        }
        if (autoDefault) {
            return (T) getInternalDefaultValue(clazz);
        } else {
            return null;
        }
    }

    if (DEF_EMPTY.equals(strValue)) {
        if (clazz.isArray()) {
            return (T) Array.newInstance(clazz.getComponentType(), 0);
        }

        if (Map.class.isAssignableFrom(clazz)) {
            return (T) Collections.EMPTY_MAP;
        }

        if (List.class.isAssignableFrom(clazz)) {
            return (T) new ArrayList<Object>();
        }

        if (Set.class.isAssignableFrom(clazz)) {
            return (T) new HashSet<Object>();
        }

        if (String.class.equals(clazz)) {
            return (T) StringUtils.EMPTY;
        }

        if (Character.TYPE.equals(clazz) || Character.class.equals(clazz)) {
            return (T) Character.valueOf(' ');
        }

        if (autoDefault) {
            return (T) getInternalDefaultValue(clazz);
        } else {
            return null;
        }
    }

    if (StringUtils.isBlank(strValue)) {// ?
        if (autoDefault) {
            return (T) getInternalDefaultValue(clazz);
        } else {
            return null;
        }
    } else {

        if (String.class.equals(clazz)) {
            return (T) strValue;
        }

        if (Short.TYPE.equals(clazz) || Short.class.equals(clazz)) {
            return (T) Short.valueOf(strValue);
        }

        if (Integer.TYPE.equals(clazz) || Integer.class.equals(clazz)) {
            return (T) Integer.valueOf(strValue);
        }
        if (Long.TYPE.equals(clazz) || Long.class.equals(clazz)) {
            return (T) Long.valueOf(strValue);
        }
        if (Boolean.TYPE.equals(clazz) || Boolean.class.equals(clazz)) {
            return (T) Boolean.valueOf(strValue);
        }
        if (Float.TYPE.equals(clazz) || Float.class.equals(clazz)) {
            return (T) Float.valueOf(strValue);
        }
        if (Double.TYPE.equals(clazz) || Double.class.equals(clazz)) {
            return (T) Double.valueOf(strValue);
        }
        if (Byte.TYPE.equals(clazz) || Byte.class.equals(clazz)) {
            return (T) Byte.valueOf(strValue);
        }
        if (Character.TYPE.equals(clazz) || Character.class.equals(clazz)) {
            return (T) Character.valueOf(strValue.charAt(0));
        }

        if (clazz.isArray()) {
            final Class<?> componentType = clazz.getComponentType();
            // String[]
            if (String.class.equals(componentType)) {
                return (T) StringUtils.split(strValue, ',');
            }
            // ?char[]
            if (Character.TYPE.equals(componentType)) {
                return (T) strValue.toCharArray();
            }

            if (Character.class.equals(componentType)) {
                final char[] tmp = strValue.toCharArray();
                final Character[] result = new Character[tmp.length];
                for (int i = 0; i < result.length; i++) {
                    result[i] = tmp[i];
                }
                return (T) result;
            }

            if (Byte.TYPE.equals(componentType) || Byte.class.equals(componentType)) {
                return (T) (strValue == null ? null : strValue.getBytes());
            }
        }
    }

    return null;

}

---

From source file:com.sinosoft.one.data.jade.rowmapper.DefaultRowMapperFactory.java

private static Class<?> getRowType(StatementMetaData statementMetaData) {
    Class<?> returnClassType = statementMetaData.getMethod().getReturnType();
    if (Collection.class.isAssignableFrom(returnClassType) || Page.class.isAssignableFrom(returnClassType)) {
        return getRowTypeFromCollectionType(statementMetaData, returnClassType);
    } else if (Map.class == returnClassType) {
        return getRowTypeFromMapType(statementMetaData, returnClassType);
    } else if (returnClassType.isArray() && returnClassType != byte[].class) {
        // , ??/*from   w w  w  .ja va  2s .  c o m*/
        return returnClassType.getComponentType();
    }

    // DAO?
    return returnClassType;
}

---

From source file:org.gridgain.grid.util.json.GridJsonDeserializer.java

/**
 * Deserializes {@link JSONArray} to Java array of given class.
 *
 * @param arr Array for deserialization.
 * @param cls Class of resulted array.//from w w w.j  a  v  a 2  s.  co  m
 * @return Deserialized array.
 * @throws GridException Thrown if any error occurs while deserialization.
 */
@SuppressWarnings("unchecked")
private static Object buildArray(JSONArray arr, Class cls) throws GridException {
    assert arr != null;
    assert cls != null;

    cls = cls.getComponentType();

    List list = new ArrayList(arr.size());

    for (Object elem : arr)
        if (!isDescriptor(elem))
            list.add(elem);

    int size = list.size();

    Object res = Array.newInstance(cls, size);

    for (int i = 0; i < size; i++)
        Array.set(res, i, deserialize(list.get(i), cls));

    return res;
}

---

From source file:jp.go.nict.langrid.servicecontainer.handler.jsonrpc.servlet.JsonRpcServlet.java

private static String prettyName(Class<?> clazz) {
    StringBuilder postfix = new StringBuilder();
    if (Proxy.isProxyClass(clazz)) {
        return "<em>Proxy Implementation (detailed information unavailable)</em>";
    }//from   w w  w.  j  av  a2s  . co  m
    if (clazz.isArray()) {
        clazz = clazz.getComponentType();
        appendGenericsInfo(clazz, postfix);
        postfix.append("[]");
    } else {
        appendGenericsInfo(clazz, postfix);
    }
    String n = clazz.getName();
    String sn = clazz.getSimpleName();
    return "<span class=\"info\">" + sn + postfix + "<span>" + n + postfix + "</span></span>";
}

---

From source file:MethodHashing.java

static String getTypeString(Class cl) {
    if (cl == Byte.TYPE) {
        return "B";
    } else if (cl == Character.TYPE) {
        return "C";
    } else if (cl == Double.TYPE) {
        return "D";
    } else if (cl == Float.TYPE) {
        return "F";
    } else if (cl == Integer.TYPE) {
        return "I";
    } else if (cl == Long.TYPE) {
        return "J";
    } else if (cl == Short.TYPE) {
        return "S";
    } else if (cl == Boolean.TYPE) {
        return "Z";
    } else if (cl == Void.TYPE) {
        return "V";
    } else if (cl.isArray()) {
        return "[" + getTypeString(cl.getComponentType());
    } else {/*from   ww w  . java 2s.  c  om*/
        return "L" + cl.getName().replace('.', '/') + ";";
    }
}

---

From source file:ArrayUtils.java

@SuppressWarnings("unchecked")
public static <T> T[] toArray(final Collection<T> c, final Class<? extends T[]> newType) {
    final int length = c.size();
    final T[] array = (T[]) Array.newInstance(newType.getComponentType(), length);
    if (length > 0) {
        int i = 0;
        for (final T elem : c) {
            array[i++] = elem;// w  ww.j  a  va2 s .c om
        }
    }
    return array;
}

---

From source file:com.gzj.tulip.jade.rowmapper.DefaultRowMapperFactory.java

private static Class<?> getRowType(StatementMetaData statementMetaData) {
    Class<?> returnClassType = statementMetaData.getReturnType();
    if (Collection.class.isAssignableFrom(returnClassType)//
            || Iterable.class == returnClassType // 
            || Iterator.class == returnClassType) {
        return getRowTypeFromCollectionType(statementMetaData, returnClassType);
    } ///* www.  j  ava2s.  c  o m*/
    else if (Map.class.isAssignableFrom(returnClassType)) {
        return getRowTypeFromMapType(statementMetaData, returnClassType);
    }
    //
    else if (returnClassType.isArray() && returnClassType != byte[].class) {
        // , ??
        return returnClassType.getComponentType();
    }

    // DAO?
    return returnClassType;
}

---

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