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/*
* Licensed to the Nervousync Studio (NSYC) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.nervousync.utils;
import java.lang.reflect.Array;
import java.lang.reflect.Constructor;
import java.math.BigInteger;
import java.util.Arrays;
import java.util.Date;
import java.util.List;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlType;
import com.nervousync.commons.beans.xml.BaseElement;
import com.nervousync.enumerations.xml.DataType;
import com.nervousync.interceptor.beans.BaseHandlerInterceptor;
import net.sf.cglib.proxy.Enhancer;
/**
* @author Steven Wee [email protected]
* @version $Revision: 1.0 $ $Date: Jan 13, 2010 4:26:58 PM $
*/
public final class ObjectUtils {
private static final int INITIAL_HASH = 7;
private static final int MULTIPLIER = 31;
private static final String EMPTY_STRING = "";
private static final String NULL_STRING = "null";
private static final String ARRAY_START = "{";
private static final String ARRAY_END = "}";
private static final String EMPTY_ARRAY = ARRAY_START + ARRAY_END;
private static final String ARRAY_ELEMENT_SEPARATOR = ", ";
private ObjectUtils() {
}
/**
* Create a proxy object instance
* @param className class name
* @return object instance
* @throws ClassNotFoundException if class was not found
* @throws LinkageError if class link error
*/
public static Object newInstance(String className)
throws ClassNotFoundException, LinkageError {
return newInstance(className, new Object[]{}, null);
}
/**
* Create a proxy object instance
* @param className class name
* @param args Constructor parameters
* @return object instance
* @throws ClassNotFoundException if class was not found
* @throws LinkageError if class link error
*/
public static Object newInstance(String className, Object[] args)
throws ClassNotFoundException, LinkageError {
return newInstance(className, args, null);
}
/**
* Create a proxy object instance
* @param className class name
* @param args Constructor parameters
* @param methodInterceptor method interceptor instance
* @return object instance
* @throws ClassNotFoundException if class was not found
* @throws LinkageError if class link error
*/
public static Object newInstance(String className, Object[] args, BaseHandlerInterceptor methodInterceptor)
throws ClassNotFoundException, LinkageError {
BaseHandlerInterceptor[] methodInterceptors = null;
if (methodInterceptor != null) {
methodInterceptors = new BaseHandlerInterceptor[]{methodInterceptor};
}
return createProxyInstance(ClassUtils.forName(className), args, methodInterceptors);
}
/**
* Create a proxy object instance
* @param clazz define class
* @param T
* @return object instance
*/
public static T newInstance(Class clazz) {
return createProxyInstance(clazz, null, new BaseHandlerInterceptor[]{});
}
/**
* Create a proxy object instance
* @param clazz define class
* @param methodInterceptor method interceptor instance
* @param T
* @return object instance
*/
public static T createProxyInstance(Class clazz, BaseHandlerInterceptor methodInterceptor) {
BaseHandlerInterceptor[] methodInterceptors = null;
if (methodInterceptor != null) {
methodInterceptors = new BaseHandlerInterceptor[]{methodInterceptor};
}
return createProxyInstance(clazz, null, methodInterceptors);
}
/**
* Create a proxy object instance
* @param clazz define class
* @param args Constructor parameters
* @param methodInterceptor method interceptor instance
* @param T
* @return object instance
*/
public static T createProxyInstance(Class clazz, Object[] args, BaseHandlerInterceptor methodInterceptor) {
BaseHandlerInterceptor[] methodInterceptors = null;
if (methodInterceptor != null) {
methodInterceptors = new BaseHandlerInterceptor[]{methodInterceptor};
}
return createProxyInstance(clazz, args, methodInterceptors);
}
/**
* Create a proxy object instance
* @param clazz define class
* @param args Constructor parameters
* @param methodInterceptors method interceptor instance arrays
* @param T
* @return object instance
*/
@SuppressWarnings("unchecked")
public static T createProxyInstance(Class clazz, Object[] args, BaseHandlerInterceptor[] methodInterceptors) {
T object = null;
if (methodInterceptors != null && methodInterceptors.length > 0) {
Enhancer enhancer = new Enhancer();
enhancer.setSuperclass(clazz);
for (BaseHandlerInterceptor methodInterceptor : methodInterceptors) {
if (methodInterceptor != null) {
enhancer.setCallback(methodInterceptor);
}
}
if (args == null || args.length == 0) {
object = (T) enhancer.create();
} else {
Class[] classes = new Class[args.length];
for (int i = 0 ; i < args.length ; i++) {
classes[i] = args[i].getClass();
}
object = (T) enhancer.create(classes, args);
}
} else {
try {
if (args == null || args.length == 0) {
object = clazz.newInstance();
} else {
Class[] classes = new Class[args.length];
for (int i = 0 ; i < args.length ; i++) {
classes[i] = args[i].getClass();
}
Constructor constructor = ReflectionUtils.findConstructor(clazz, classes);
object = constructor.newInstance(args);
}
} catch (Exception e) {
object = null;
}
}
return object;
}
/**
* Return whether the given throwable is a checked exception:
* that is, neither a RuntimeException nor an Error.
* @param ex the throwable to check
* @return whether the throwable is a checked exception
* @see java.lang.Exception
* @see java.lang.RuntimeException
* @see java.lang.Error
*/
public static boolean isCheckedException(Throwable ex) {
return !(ex instanceof RuntimeException || ex instanceof Error);
}
/**
* Check whether the given exception is compatible with the exceptions
* declared in a throws clause.
* @param ex the exception to checked
* @param declaredExceptions the exceptions declared in the throws clause
* @return whether the given exception is compatible
*/
public static boolean isCompatibleWithThrowsClause(Throwable ex, Class[] declaredExceptions) {
if (!isCheckedException(ex)) {
return true;
}
if (declaredExceptions != null) {
for (int i = 0; i < declaredExceptions.length; i++) {
if (declaredExceptions[i].isAssignableFrom(ex.getClass())) {
return true;
}
}
}
return false;
}
/**
* Return whether the given array is empty: that is, null
* or of zero length.
* @param array the array to check
* @return whether the given array is empty
*/
public static boolean isEmpty(Object[] array) {
return (array == null || array.length == 0);
}
/**
* Return whether the given array is empty: that is, null
* or of zero length.
* @param object the object to check
* @return whether the given array is empty
*/
public static boolean isNull(Object object) {
if (object == null) {
return true;
}
if (object.getClass().isArray()) {
if (Array.getLength(object) == 0) {
return true;
}
} else {
if (object instanceof String) {
if (((String)object).length() == 0) {
return true;
}
}
}
return false;
}
/**
* Check whether the given array contains the given element.
* @param array the array to check (may be null,
* in which case the return value will always be false)
* @param element the element to check for
* @return whether the element has been found in the given array
*/
public static boolean containsElement(Object[] array, Object element) {
if (array == null) {
return false;
}
for (int i = 0; i < array.length; i++) {
if (nullSafeEquals(array[i], element)) {
return true;
}
}
return false;
}
/**
* Append the given Object to the given array, returning a new array
* consisting of the input array contents plus the given Object.
* @param array the array to append to (can be null)
* @param obj the Object to append
* @return the new array (of the same component type; never null)
*/
public static Object[] addObjectToArray(Object[] array, Object obj) {
Class compType = Object.class;
if (array != null) {
compType = array.getClass().getComponentType();
}
else if (obj != null) {
compType = obj.getClass();
}
int newArrLength = (array != null ? array.length + 1 : 1);
Object[] newArr = (Object[]) Array.newInstance(compType, newArrLength);
if (array != null) {
System.arraycopy(array, 0, newArr, 0, array.length);
}
newArr[newArr.length - 1] = obj;
return newArr;
}
/**
* Convert the given array (which may be a primitive array) to an
* object array (if necessary of primitive wrapper objects).
* A null source value will be converted to an
* empty Object array.
* @param source the (potentially primitive) array
* @return the corresponding object array (never null)
* @throws IllegalArgumentException if the parameter is not an array
*/
public static Object[] toObjectArray(Object source) {
if (source instanceof Object[]) {
return (Object[]) source;
}
if (source == null) {
return new Object[0];
}
if (!source.getClass().isArray()) {
throw new IllegalArgumentException("Source is not an array: " + source);
}
int length = Array.getLength(source);
if (length == 0) {
return new Object[0];
}
Class wrapperType = Array.get(source, 0).getClass();
Object[] newArray = (Object[]) Array.newInstance(wrapperType, length);
for (int i = 0; i < length; i++) {
newArray[i] = Array.get(source, i);
}
return newArray;
}
public static DataType retrieveSimpleDataType(Class clazz) {
if (clazz == null) {
return DataType.UNKNOWN;
}
if (clazz.equals(Character[].class) || clazz.equals(char[].class)) {
return DataType.CDATA;
} else if (clazz.equals(Byte[].class) || clazz.equals(byte[].class)) {
return DataType.BINARY;
} else if (clazz.equals(Boolean.class) || clazz.equals(boolean.class)) {
return DataType.BOOLEAN;
} else if (clazz.equals(Date.class)) {
return DataType.DATE;
} else if (clazz.equals(Integer.class) || clazz.equals(int.class)
|| clazz.equals(Float.class) || clazz.equals(float.class)
|| clazz.equals(Double.class) || clazz.equals(double.class)
|| clazz.equals(Short.class) || clazz.equals(short.class)
|| clazz.equals(Long.class) || clazz.equals(long.class)
|| clazz.equals(BigInteger.class) || clazz.equals(Number.class)) {
return DataType.NUMBER;
} else if (clazz.equals(String.class)) {
return DataType.STRING;
} else if (BaseElement.class.isAssignableFrom(clazz)
&& (clazz.isAnnotationPresent(XmlType.class) || clazz.isAnnotationPresent(XmlRootElement.class))) {
return DataType.OBJECT;
} else if (clazz.isEnum()) {
return DataType.ENUM;
} else {
return DataType.UNKNOWN;
}
}
//---------------------------------------------------------------------
// Convenience methods for content-based equality/hash-code handling
//---------------------------------------------------------------------
/**
* Determine if the given objects are equal, returning true
* if both are null or false if only one is
* null.
*
Compares arrays with Arrays.equals, performing an equality
* check based on the array elements rather than the array reference.
* @param o1 first Object to compare
* @param o2 second Object to compare
* @return whether the given objects are equal
* @see java.util.Arrays#equals
*/
public static boolean nullSafeEquals(Object o1, Object o2) {
if (o1 == o2) {
return true;
}
if (o1 == null || o2 == null) {
return false;
}
if (o1.equals(o2)) {
return true;
}
if (o1.getClass().isArray() && o2.getClass().isArray()) {
if (o1 instanceof Object[] && o2 instanceof Object[]) {
return Arrays.equals((Object[]) o1, (Object[]) o2);
}
if (o1 instanceof boolean[] && o2 instanceof boolean[]) {
return Arrays.equals((boolean[]) o1, (boolean[]) o2);
}
if (o1 instanceof byte[] && o2 instanceof byte[]) {
return Arrays.equals((byte[]) o1, (byte[]) o2);
}
if (o1 instanceof char[] && o2 instanceof char[]) {
return Arrays.equals((char[]) o1, (char[]) o2);
}
if (o1 instanceof double[] && o2 instanceof double[]) {
return Arrays.equals((double[]) o1, (double[]) o2);
}
if (o1 instanceof float[] && o2 instanceof float[]) {
return Arrays.equals((float[]) o1, (float[]) o2);
}
if (o1 instanceof int[] && o2 instanceof int[]) {
return Arrays.equals((int[]) o1, (int[]) o2);
}
if (o1 instanceof long[] && o2 instanceof long[]) {
return Arrays.equals((long[]) o1, (long[]) o2);
}
if (o1 instanceof short[] && o2 instanceof short[]) {
return Arrays.equals((short[]) o1, (short[]) o2);
}
}
return false;
}
/**
* Return as hash code for the given object; typically the value of
* {@link Object#hashCode()}. If the object is an array,
* this method will delegate to any of the nullSafeHashCode
* methods for arrays in this class. If the object is null,
* this method returns 0.
* @param obj check object
* @see #nullSafeHashCode(Object[])
* @see #nullSafeHashCode(boolean[])
* @see #nullSafeHashCode(byte[])
* @see #nullSafeHashCode(char[])
* @see #nullSafeHashCode(double[])
* @see #nullSafeHashCode(float[])
* @see #nullSafeHashCode(int[])
* @see #nullSafeHashCode(long[])
* @see #nullSafeHashCode(short[])
* @return object hash code
*/
public static int nullSafeHashCode(Object obj) {
if (obj == null) {
return 0;
}
if (obj.getClass().isArray()) {
if (obj instanceof Object[]) {
return nullSafeHashCode((Object[]) obj);
}
if (obj instanceof boolean[]) {
return nullSafeHashCode((boolean[]) obj);
}
if (obj instanceof byte[]) {
return nullSafeHashCode((byte[]) obj);
}
if (obj instanceof char[]) {
return nullSafeHashCode((char[]) obj);
}
if (obj instanceof double[]) {
return nullSafeHashCode((double[]) obj);
}
if (obj instanceof float[]) {
return nullSafeHashCode((float[]) obj);
}
if (obj instanceof int[]) {
return nullSafeHashCode((int[]) obj);
}
if (obj instanceof long[]) {
return nullSafeHashCode((long[]) obj);
}
if (obj instanceof short[]) {
return nullSafeHashCode((short[]) obj);
}
}
return obj.hashCode();
}
/**
* Return a hash code based on the contents of the specified array.
* If array is null, this method returns 0.
* @param array specified array
* @return hash code result
*/
public static int nullSafeHashCode(Object[] array) {
if (array == null) {
return 0;
}
int hash = INITIAL_HASH;
int arraySize = array.length;
for (int i = 0; i < arraySize; i++) {
hash = MULTIPLIER * hash + nullSafeHashCode(array[i]);
}
return hash;
}
/**
* Return a hash code based on the contents of the specified array.
* If array is null, this method returns 0.
* @param array specified array
* @return hash code result
*/
public static int nullSafeHashCode(boolean[] array) {
if (array == null) {
return 0;
}
int hash = INITIAL_HASH;
int arraySize = array.length;
for (int i = 0; i < arraySize; i++) {
hash = MULTIPLIER * hash + hashCode(array[i]);
}
return hash;
}
/**
* Return a hash code based on the contents of the specified array.
* If array is null, this method returns 0.
* @param array specified array
* @return hash code result
*/
public static int nullSafeHashCode(byte[] array) {
if (array == null) {
return 0;
}
int hash = INITIAL_HASH;
int arraySize = array.length;
for (int i = 0; i < arraySize; i++) {
hash = MULTIPLIER * hash + array[i];
}
return hash;
}
/**
* Return a hash code based on the contents of the specified array.
* If array is null, this method returns 0.
* @param array specified array
* @return hash code result
*/
public static int nullSafeHashCode(char[] array) {
if (array == null) {
return 0;
}
int hash = INITIAL_HASH;
int arraySize = array.length;
for (int i = 0; i < arraySize; i++) {
hash = MULTIPLIER * hash + array[i];
}
return hash;
}
/**
* Return a hash code based on the contents of the specified array.
* If array is null, this method returns 0.
* @param array specified array
* @return hash code result
*/
public static int nullSafeHashCode(double[] array) {
if (array == null) {
return 0;
}
int hash = INITIAL_HASH;
int arraySize = array.length;
for (int i = 0; i < arraySize; i++) {
hash = MULTIPLIER * hash + hashCode(array[i]);
}
return hash;
}
/**
* Return a hash code based on the contents of the specified array.
* If array is null, this method returns 0.
* @param array specified array
* @return hash code result
*/
public static int nullSafeHashCode(float[] array) {
if (array == null) {
return 0;
}
int hash = INITIAL_HASH;
int arraySize = array.length;
for (int i = 0; i < arraySize; i++) {
hash = MULTIPLIER * hash + hashCode(array[i]);
}
return hash;
}
/**
* Return a hash code based on the contents of the specified array.
* If array is null, this method returns 0.
* @param array specified array
* @return hash code result
*/
public static int nullSafeHashCode(int[] array) {
if (array == null) {
return 0;
}
int hash = INITIAL_HASH;
int arraySize = array.length;
for (int i = 0; i < arraySize; i++) {
hash = MULTIPLIER * hash + array[i];
}
return hash;
}
/**
* Return a hash code based on the contents of the specified array.
* If array is null, this method returns 0.
* @param array specified array
* @return hash code result
*/
public static int nullSafeHashCode(long[] array) {
if (array == null) {
return 0;
}
int hash = INITIAL_HASH;
int arraySize = array.length;
for (int i = 0; i < arraySize; i++) {
hash = MULTIPLIER * hash + hashCode(array[i]);
}
return hash;
}
/**
* Return a hash code based on the contents of the specified array.
* If array is null, this method returns 0.
* @param array specified array
* @return hash code result
*/
public static int nullSafeHashCode(short[] array) {
if (array == null) {
return 0;
}
int hash = INITIAL_HASH;
int arraySize = array.length;
for (int i = 0; i < arraySize; i++) {
hash = MULTIPLIER * hash + array[i];
}
return hash;
}
/**
* Return the same value as {@link Boolean#hashCode()}.
* @see Boolean#hashCode()
* @param bool boolean value
* @return hash code result
*/
public static int hashCode(boolean bool) {
return bool ? 1231 : 1237;
}
/**
* Return the same value as {@link Double#hashCode()}.
* @see Double#hashCode()
* @param dbl double value
* @return hash code result
*/
public static int hashCode(double dbl) {
long bits = Double.doubleToLongBits(dbl);
return hashCode(bits);
}
/**
* Return the same value as {@link Float#hashCode()}.
* @see Float#hashCode()
* @param flt float value
* @return hash code result
*/
public static int hashCode(float flt) {
return Float.floatToIntBits(flt);
}
/**
* Return the same value as {@link Long#hashCode()}.
* @see Long#hashCode()
* @param lng long value
* @return hash code result
*/
public static int hashCode(long lng) {
return (int) (lng ^ (lng >>> 32));
}
//---------------------------------------------------------------------
// Convenience methods for toString output
//---------------------------------------------------------------------
/**
* Return a String representation of an object's overall identity.
* @param obj the object (may be null)
* @return the object's identity as String representation,
* or an empty String if the object was null
*/
public static String identityToString(Object obj) {
if (obj == null) {
return EMPTY_STRING;
}
return obj.getClass().getName() + "@" + getIdentityHexString(obj);
}
/**
* Return a hex String form of an object's identity hash code.
* @param obj the object
* @return the object's identity code in hex notation
*/
public static String getIdentityHexString(Object obj) {
return Integer.toHexString(System.identityHashCode(obj));
}
/**
* Return a content-based String representation if obj is
* not null; otherwise returns an empty String.
*
Differs from {@link #nullSafeToString(Object)} in that it returns
* an empty String rather than "null" for a null value.
* @param obj the object to build a display String for
* @return a display String representation of obj
* @see #nullSafeToString(Object)
*/
public static String getDisplayString(Object obj) {
if (obj == null) {
return EMPTY_STRING;
}
return nullSafeToString(obj);
}
/**
* Determine the class name for the given object.
*
Returns "null" if obj is null.
* @param obj the object to introspect (may be null)
* @return the corresponding class name
*/
public static String nullSafeClassName(Object obj) {
return (obj != null ? obj.getClass().getName() : NULL_STRING);
}
/**
* Return a String representation of the specified Object.
*
Builds a String representation of the contents in case of an array.
* Returns "null" if obj is null.
* @param obj the object to build a String representation for
* @return a String representation of obj
*/
public static String nullSafeToString(Object obj) {
if (obj == null) {
return NULL_STRING;
}
if (obj instanceof String) {
return (String) obj;
}
if (obj instanceof Object[]) {
return nullSafeToString((Object[]) obj);
}
if (obj instanceof boolean[]) {
return nullSafeToString((boolean[]) obj);
}
if (obj instanceof byte[]) {
return nullSafeToString((byte[]) obj);
}
if (obj instanceof char[]) {
return nullSafeToString((char[]) obj);
}
if (obj instanceof double[]) {
return nullSafeToString((double[]) obj);
}
if (obj instanceof float[]) {
return nullSafeToString((float[]) obj);
}
if (obj instanceof int[]) {
return nullSafeToString((int[]) obj);
}
if (obj instanceof long[]) {
return nullSafeToString((long[]) obj);
}
if (obj instanceof short[]) {
return nullSafeToString((short[]) obj);
}
if (obj instanceof List) {
StringBuffer stringBuffer = new StringBuffer();
int count = ((List)obj).size();
String split = "";
for (int i = 0 ; i < count ; i++) {
Object object = ((List)obj).get(i);
stringBuffer.append(split + nullSafeToString(object));
split = ",";
}
return stringBuffer.toString();
}
String str = obj.toString();
return (str != null ? str : EMPTY_STRING);
}
/**
* Return a String representation of the contents of the specified array.
*
The String representation consists of a list of the array's elements,
* enclosed in curly braces ("{}"). Adjacent elements are separated
* by the characters ", " (a comma followed by a space). Returns
* "null" if array is null.
* @param array the array to build a String representation for
* @return a String representation of array
*/
public static String nullSafeToString(Object[] array) {
if (array == null) {
return NULL_STRING;
}
int length = array.length;
if (length == 0) {
return EMPTY_ARRAY;
}
StringBuffer buffer = new StringBuffer();
for (int i = 0; i < length; i++) {
if (i == 0) {
buffer.append(ARRAY_START);
}
else {
buffer.append(ARRAY_ELEMENT_SEPARATOR);
}
buffer.append(String.valueOf(array[i]));
}
buffer.append(ARRAY_END);
return buffer.toString();
}
/**
* Return a String representation of the contents of the specified array.
*
The String representation consists of a list of the array's elements,
* enclosed in curly braces ("{}"). Adjacent elements are separated
* by the characters ", " (a comma followed by a space). Returns
* "null" if array is null.
* @param array the array to build a String representation for
* @return a String representation of array
*/
public static String nullSafeToString(boolean[] array) {
if (array == null) {
return NULL_STRING;
}
int length = array.length;
if (length == 0) {
return EMPTY_ARRAY;
}
StringBuffer buffer = new StringBuffer();
for (int i = 0; i < length; i++) {
if (i == 0) {
buffer.append(ARRAY_START);
}
else {
buffer.append(ARRAY_ELEMENT_SEPARATOR);
}
buffer.append(array[i]);
}
buffer.append(ARRAY_END);
return buffer.toString();
}
/**
* Return a String representation of the contents of the specified array.
*
The String representation consists of a list of the array's elements,
* enclosed in curly braces ("{}"). Adjacent elements are separated
* by the characters ", " (a comma followed by a space). Returns
* "null" if array is null.
* @param array the array to build a String representation for
* @return a String representation of array
*/
public static String nullSafeToString(byte[] array) {
if (array == null) {
return NULL_STRING;
}
int length = array.length;
if (length == 0) {
return EMPTY_ARRAY;
}
StringBuffer buffer = new StringBuffer();
for (int i = 0; i < length; i++) {
if (i == 0) {
buffer.append(ARRAY_START);
}
else {
buffer.append(ARRAY_ELEMENT_SEPARATOR);
}
buffer.append(array[i]);
}
buffer.append(ARRAY_END);
return buffer.toString();
}
/**
* Return a String representation of the contents of the specified array.
*
The String representation consists of a list of the array's elements,
* enclosed in curly braces ("{}"). Adjacent elements are separated
* by the characters ", " (a comma followed by a space). Returns
* "null" if array is null.
* @param array the array to build a String representation for
* @return a String representation of array
*/
public static String nullSafeToString(char[] array) {
if (array == null) {
return NULL_STRING;
}
int length = array.length;
if (length == 0) {
return EMPTY_ARRAY;
}
StringBuffer buffer = new StringBuffer();
for (int i = 0; i < length; i++) {
if (i == 0) {
buffer.append(ARRAY_START);
}
else {
buffer.append(ARRAY_ELEMENT_SEPARATOR);
}
buffer.append("'").append(array[i]).append("'");
}
buffer.append(ARRAY_END);
return buffer.toString();
}
/**
* Return a String representation of the contents of the specified array.
*
The String representation consists of a list of the array's elements,
* enclosed in curly braces ("{}"). Adjacent elements are separated
* by the characters ", " (a comma followed by a space). Returns
* "null" if array is null.
* @param array the array to build a String representation for
* @return a String representation of array
*/
public static String nullSafeToString(double[] array) {
if (array == null) {
return NULL_STRING;
}
int length = array.length;
if (length == 0) {
return EMPTY_ARRAY;
}
StringBuffer buffer = new StringBuffer();
for (int i = 0; i < length; i++) {
if (i == 0) {
buffer.append(ARRAY_START);
}
else {
buffer.append(ARRAY_ELEMENT_SEPARATOR);
}
buffer.append(array[i]);
}
buffer.append(ARRAY_END);
return buffer.toString();
}
/**
* Return a String representation of the contents of the specified array.
*
The String representation consists of a list of the array's elements,
* enclosed in curly braces ("{}"). Adjacent elements are separated
* by the characters ", " (a comma followed by a space). Returns
* "null" if array is null.
* @param array the array to build a String representation for
* @return a String representation of array
*/
public static String nullSafeToString(float[] array) {
if (array == null) {
return NULL_STRING;
}
int length = array.length;
if (length == 0) {
return EMPTY_ARRAY;
}
StringBuffer buffer = new StringBuffer();
for (int i = 0; i < length; i++) {
if (i == 0) {
buffer.append(ARRAY_START);
}
else {
buffer.append(ARRAY_ELEMENT_SEPARATOR);
}
buffer.append(array[i]);
}
buffer.append(ARRAY_END);
return buffer.toString();
}
/**
* Return a String representation of the contents of the specified array.
*
The String representation consists of a list of the array's elements,
* enclosed in curly braces ("{}"). Adjacent elements are separated
* by the characters ", " (a comma followed by a space). Returns
* "null" if array is null.
* @param array the array to build a String representation for
* @return a String representation of array
*/
public static String nullSafeToString(int[] array) {
if (array == null) {
return NULL_STRING;
}
int length = array.length;
if (length == 0) {
return EMPTY_ARRAY;
}
StringBuffer buffer = new StringBuffer();
for (int i = 0; i < length; i++) {
if (i == 0) {
buffer.append(ARRAY_START);
}
else {
buffer.append(ARRAY_ELEMENT_SEPARATOR);
}
buffer.append(array[i]);
}
buffer.append(ARRAY_END);
return buffer.toString();
}
/**
* Return a String representation of the contents of the specified array.
*
The String representation consists of a list of the array's elements,
* enclosed in curly braces ("{}"). Adjacent elements are separated
* by the characters ", " (a comma followed by a space). Returns
* "null" if array is null.
* @param array the array to build a String representation for
* @return a String representation of array
*/
public static String nullSafeToString(long[] array) {
if (array == null) {
return NULL_STRING;
}
int length = array.length;
if (length == 0) {
return EMPTY_ARRAY;
}
StringBuffer buffer = new StringBuffer();
for (int i = 0; i < length; i++) {
if (i == 0) {
buffer.append(ARRAY_START);
}
else {
buffer.append(ARRAY_ELEMENT_SEPARATOR);
}
buffer.append(array[i]);
}
buffer.append(ARRAY_END);
return buffer.toString();
}
/**
* Return a String representation of the contents of the specified array.
*
The String representation consists of a list of the array's elements,
* enclosed in curly braces ("{}"). Adjacent elements are separated
* by the characters ", " (a comma followed by a space). Returns
* "null" if array is null.
* @param array the array to build a String representation for
* @return a String representation of array
*/
public static String nullSafeToString(short[] array) {
if (array == null) {
return NULL_STRING;
}
int length = array.length;
if (length == 0) {
return EMPTY_ARRAY;
}
StringBuffer buffer = new StringBuffer();
for (int i = 0; i < length; i++) {
if (i == 0) {
buffer.append(ARRAY_START);
}
else {
buffer.append(ARRAY_ELEMENT_SEPARATOR);
}
buffer.append(array[i]);
}
buffer.append(ARRAY_END);
return buffer.toString();
}
}