List of usage examples for java.lang Number byteValue
public byte byteValue()
From source file:Main.java
public static void main(String[] args) { // get a number as integer Number x = new Integer(123456); // get a number as float Number y = new Float(9876f); // print their value as byte System.out.println("x as integer:" + x + ", x as byte:" + x.byteValue()); System.out.println("y as float:" + y + ", y as byte:" + y.byteValue()); }
From source file:Main.java
public static byte[] toByteArray(Collection<? extends Number> c) { byte arr[] = new byte[c.size()]; int i = 0;/*w w w. j av a2 s .co m*/ for (Number item : c) { arr[i++] = item.byteValue(); } return arr; }
From source file:Main.java
public static byte[] toByteArray(Collection<? extends Number> c) { byte arr[] = new byte[c.size()]; int i = 0;/*from w w w . j a v a 2 s . c o m*/ for (Number item : c) arr[i++] = item.byteValue(); return arr; }
From source file:io.fabric8.jolokia.support.JolokiaHelpers.java
public static Object convertJolokiaToJavaType(Class<?> clazz, Object value) throws IOException { if (clazz.isArray()) { if (value instanceof JSONArray) { JSONArray jsonArray = (JSONArray) value; Object[] javaArray = (Object[]) Array.newInstance(clazz.getComponentType(), jsonArray.size()); int idx = 0; for (Object element : jsonArray) { Array.set(javaArray, idx++, convertJolokiaToJavaType(clazz.getComponentType(), element)); }/*from www. ja va 2 s .com*/ return javaArray; } else { return null; } } else if (String.class.equals(clazz)) { return (value != null) ? value.toString() : null; } else if (clazz.equals(Byte.class) || clazz.equals(byte.class)) { Number number = asNumber(value); return number != null ? number.byteValue() : null; } else if (clazz.equals(Short.class) || clazz.equals(short.class)) { Number number = asNumber(value); return number != null ? number.shortValue() : null; } else if (clazz.equals(Integer.class) || clazz.equals(int.class)) { Number number = asNumber(value); return number != null ? number.intValue() : null; } else if (clazz.equals(Long.class) || clazz.equals(long.class)) { Number number = asNumber(value); return number != null ? number.longValue() : null; } else if (clazz.equals(Float.class) || clazz.equals(float.class)) { Number number = asNumber(value); return number != null ? number.floatValue() : null; } else if (clazz.equals(Double.class) || clazz.equals(double.class)) { Number number = asNumber(value); return number != null ? number.doubleValue() : null; } else if (value instanceof JSONObject) { JSONObject jsonObject = (JSONObject) value; if (!JSONObject.class.isAssignableFrom(clazz)) { String json = jsonObject.toJSONString(); return getObjectMapper().readerFor(clazz).readValue(json); } } return value; }
From source file:mil.jpeojtrs.sca.util.PrimitiveArrayUtils.java
public static byte[] convertToByteArray(final Object array) { if (array == null) { return null; }//from w ww . j a v a 2 s . c om if (array instanceof byte[]) { return (byte[]) array; } if (array instanceof Byte[]) { return ArrayUtils.toPrimitive((Byte[]) array); } final byte[] newArray = new byte[Array.getLength(array)]; for (int i = 0; i < newArray.length; i++) { final Number val = (Number) Array.get(array, i); newArray[i] = val.byteValue(); } return newArray; }
From source file:net.dontdrinkandroot.utils.lang.math.NumberUtils.java
/** * Get the null safe byteValue of a Number. Defaults to 0. * /*www. j a v a 2s. c om*/ * @param number * The Number to convert. * @return The null safe byteValue. Defaults to 0. */ public static byte byteValue(final Number number) { if (number == null) { return 0; } return number.byteValue(); }
From source file:gedi.util.MathUtils.java
/** * Throws an exception if n is either a real or to big to be represented by a byte. * @param n/*from w w w . j av a 2s. c o m*/ * @return */ public static byte byteValueExact(Number n) { if (n instanceof Byte) return n.byteValue(); double d = n.doubleValue(); long l = n.longValue(); if (d == (double) l) { if (l >= Byte.MIN_VALUE && l <= Byte.MAX_VALUE) return (byte) l; } throw new NumberFormatException(); }
From source file:com.adobe.acs.commons.mcp.util.AnnotatedFieldDeserializer.java
@SuppressWarnings("squid:S3776") private static Object convertPrimitiveValue(String value, Class<?> type) throws ParseException { if (type.equals(Boolean.class) || type.equals(Boolean.TYPE)) { return value.toLowerCase().trim().equals("true"); } else {// w ww .ja va 2 s.co m NumberFormat numberFormat = NumberFormat.getNumberInstance(); Number num = numberFormat.parse(value); if (type.equals(Byte.class) || type.equals(Byte.TYPE)) { return num.byteValue(); } else if (type.equals(Double.class) || type.equals(Double.TYPE)) { return num.doubleValue(); } else if (type.equals(Float.class) || type.equals(Float.TYPE)) { return num.floatValue(); } else if (type.equals(Integer.class) || type.equals(Integer.TYPE)) { return num.intValue(); } else if (type.equals(Long.class) || type.equals(Long.TYPE)) { return num.longValue(); } else if (type.equals(Short.class) || type.equals(Short.TYPE)) { return num.shortValue(); } else { return null; } } }
From source file:Main.java
/** * convert value to given type.// w w w.j av a 2 s . co m * null safe. * * @param value value for convert * @param type will converted type * @return value while converted */ public static Object convertCompatibleType(Object value, Class<?> type) { if (value == null || type == null || type.isAssignableFrom(value.getClass())) { return value; } if (value instanceof String) { String string = (String) value; if (char.class.equals(type) || Character.class.equals(type)) { if (string.length() != 1) { throw new IllegalArgumentException(String.format("CAN NOT convert String(%s) to char!" + " when convert String to char, the String MUST only 1 char.", string)); } return string.charAt(0); } else if (type.isEnum()) { return Enum.valueOf((Class<Enum>) type, string); } else if (type == BigInteger.class) { return new BigInteger(string); } else if (type == BigDecimal.class) { return new BigDecimal(string); } else if (type == Short.class || type == short.class) { return Short.valueOf(string); } else if (type == Integer.class || type == int.class) { return Integer.valueOf(string); } else if (type == Long.class || type == long.class) { return Long.valueOf(string); } else if (type == Double.class || type == double.class) { return Double.valueOf(string); } else if (type == Float.class || type == float.class) { return Float.valueOf(string); } else if (type == Byte.class || type == byte.class) { return Byte.valueOf(string); } else if (type == Boolean.class || type == boolean.class) { return Boolean.valueOf(string); } else if (type == Date.class) { try { return new SimpleDateFormat(DATE_FORMAT).parse((String) value); } catch (ParseException e) { throw new IllegalStateException("Failed to parse date " + value + " by format " + DATE_FORMAT + ", cause: " + e.getMessage(), e); } } else if (type == Class.class) { return forName((String) value); } } else if (value instanceof Number) { Number number = (Number) value; if (type == byte.class || type == Byte.class) { return number.byteValue(); } else if (type == short.class || type == Short.class) { return number.shortValue(); } else if (type == int.class || type == Integer.class) { return number.intValue(); } else if (type == long.class || type == Long.class) { return number.longValue(); } else if (type == float.class || type == Float.class) { return number.floatValue(); } else if (type == double.class || type == Double.class) { return number.doubleValue(); } else if (type == BigInteger.class) { return BigInteger.valueOf(number.longValue()); } else if (type == BigDecimal.class) { return BigDecimal.valueOf(number.doubleValue()); } else if (type == Date.class) { return new Date(number.longValue()); } } else if (value instanceof Collection) { Collection collection = (Collection) value; if (type.isArray()) { int length = collection.size(); Object array = Array.newInstance(type.getComponentType(), length); int i = 0; for (Object item : collection) { Array.set(array, i++, item); } return array; } else if (!type.isInterface()) { try { Collection result = (Collection) type.newInstance(); result.addAll(collection); return result; } catch (Throwable e) { e.printStackTrace(); } } else if (type == List.class) { return new ArrayList<>(collection); } else if (type == Set.class) { return new HashSet<>(collection); } } else if (value.getClass().isArray() && Collection.class.isAssignableFrom(type)) { Collection collection; if (!type.isInterface()) { try { collection = (Collection) type.newInstance(); } catch (Throwable e) { collection = new ArrayList<>(); } } else if (type == Set.class) { collection = new HashSet<>(); } else { collection = new ArrayList<>(); } int length = Array.getLength(value); for (int i = 0; i < length; i++) { collection.add(Array.get(value, i)); } return collection; } return value; }
From source file:nl.strohalm.cyclos.utils.conversion.CoercionHelper.java
@SuppressWarnings({ "unchecked", "rawtypes" })
private static Object convert(Class toType, Object value) {
if ("".equals(value)) {
value = null;/* w ww.j a v a2s . co m*/
}
// If we do not want a collection, but the value is one, use the first value
if (value != null && !(Collection.class.isAssignableFrom(toType) || toType.isArray())
&& (value.getClass().isArray() || value instanceof Collection)) {
final Iterator it = IteratorUtils.getIterator(value);
if (!it.hasNext()) {
value = null;
} else {
value = it.next();
}
}
// Check for null values
if (value == null) {
if (toType.isPrimitive()) {
// On primitives, use the default value
if (toType == Boolean.TYPE) {
value = Boolean.FALSE;
} else if (toType == Character.TYPE) {
value = '\0';
} else {
value = 0;
}
} else {
// For objects, return null
return null;
}
}
// Check if the value is already of the expected type
if (toType.isInstance(value)) {
return value;
}
// If the class is primitive, use the wrapper, so we have an easier work of testing instances
if (toType.isPrimitive()) {
toType = ClassUtils.primitiveToWrapper(toType);
}
// Convert to well-known types
if (String.class.isAssignableFrom(toType)) {
if (value instanceof Entity) {
final Long entityId = ((Entity) value).getId();
return entityId == null ? null : entityId.toString();
}
return value.toString();
} else if (Number.class.isAssignableFrom(toType)) {
if (!(value instanceof Number)) {
if (value instanceof String) {
value = new BigDecimal((String) value);
} else if (value instanceof Date) {
value = ((Date) value).getTime();
} else if (value instanceof Calendar) {
value = ((Calendar) value).getTimeInMillis();
} else if (value instanceof Entity) {
value = ((Entity) value).getId();
if (value == null) {
return null;
}
} else {
throw new ConversionException("Invalid number: " + value);
}
}
final Number number = (Number) value;
if (Byte.class.isAssignableFrom(toType)) {
return number.byteValue();
} else if (Short.class.isAssignableFrom(toType)) {
return number.shortValue();
} else if (Integer.class.isAssignableFrom(toType)) {
return number.intValue();
} else if (Long.class.isAssignableFrom(toType)) {
return number.longValue();
} else if (Float.class.isAssignableFrom(toType)) {
return number.floatValue();
} else if (Double.class.isAssignableFrom(toType)) {
return number.doubleValue();
} else if (BigInteger.class.isAssignableFrom(toType)) {
return new BigInteger(number.toString());
} else if (BigDecimal.class.isAssignableFrom(toType)) {
return new BigDecimal(number.toString());
}
} else if (Boolean.class.isAssignableFrom(toType)) {
if (value instanceof Number) {
return ((Number) value).intValue() != 0;
} else if ("on".equalsIgnoreCase(value.toString())) {
return true;
} else {
return Boolean.parseBoolean(value.toString());
}
} else if (Character.class.isAssignableFrom(toType)) {
final String str = value.toString();
return (str.length() == 0) ? null : str.charAt(0);
} else if (Calendar.class.isAssignableFrom(toType)) {
if (value instanceof Date) {
final Calendar cal = new GregorianCalendar();
cal.setTime((Date) value);
return cal;
}
} else if (Date.class.isAssignableFrom(toType)) {
if (value instanceof Calendar) {
final long millis = ((Calendar) value).getTimeInMillis();
try {
return ConstructorUtils.invokeConstructor(toType, millis);
} catch (final Exception e) {
throw new IllegalStateException(e);
}
}
} else if (Enum.class.isAssignableFrom(toType)) {
Object ret;
try {
ret = Enum.valueOf(toType, value.toString());
} catch (final Exception e) {
ret = null;
}
if (ret == null) {
Object[] possible;
try {
possible = (Object[]) toType.getMethod("values").invoke(null);
} catch (final Exception e) {
throw new IllegalStateException(
"Couldn't invoke the 'values' method for enum " + toType.getName());
}
if (StringValuedEnum.class.isAssignableFrom(toType)) {
final String test = coerce(String.class, value);
for (final Object item : possible) {
if (((StringValuedEnum) item).getValue().equals(test)) {
ret = item;
break;
}
}
} else if (IntValuedEnum.class.isAssignableFrom(toType)) {
final int test = coerce(Integer.TYPE, value);
for (final Object item : possible) {
if (((IntValuedEnum) item).getValue() == test) {
ret = item;
break;
}
}
} else {
throw new ConversionException("Invalid enum: " + value);
}
}
return ret;
} else if (Entity.class.isAssignableFrom(toType)) {
final Long id = coerce(Long.class, value);
return EntityHelper.reference(toType, id);
} else if (Locale.class.isAssignableFrom(toType)) {
return LocaleConverter.instance().valueOf(value.toString());
} else if (Collection.class.isAssignableFrom(toType)) {
final Collection collection = (Collection) ClassHelper.instantiate(toType);
final Iterator iterator = IteratorUtils.getIterator(value);
while (iterator.hasNext()) {
collection.add(iterator.next());
}
return collection;
} else if (toType.isArray()) {
final Collection collection = coerceCollection(toType.getComponentType(), value);
final Object[] array = (Object[]) Array.newInstance(toType.getComponentType(), collection.size());
return collection.toArray(array);
}
// We don't know how to convert the value
throw new ConversionException("Cannot coerce value to: " + toType.getName());
}