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org.nd4j.common.io.ObjectUtils Maven / Gradle / Ivy
/*******************************************************************************
* Copyright (c) 2015-2018 Skymind, Inc.
*
* This program and the accompanying materials are made available under the
* terms of the Apache License, Version 2.0 which is available at
* https://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.
*
* SPDX-License-Identifier: Apache-2.0
******************************************************************************/
package org.nd4j.common.io;
import java.lang.reflect.Array;
import java.util.Arrays;
public abstract 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 = "{}";
private static final String ARRAY_ELEMENT_SEPARATOR = ", ";
public ObjectUtils() {}
public static boolean isCheckedException(Throwable ex) {
return !(ex instanceof RuntimeException) && !(ex instanceof Error);
}
public static boolean isCompatibleWithThrowsClause(Throwable ex, Class[] declaredExceptions) {
if (!isCheckedException(ex)) {
return true;
} else {
if (declaredExceptions != null) {
for (int i = 0; i < declaredExceptions.length; ++i) {
if (declaredExceptions[i].isAssignableFrom(ex.getClass())) {
return true;
}
}
}
return false;
}
}
public static boolean isArray(Object obj) {
return obj != null && obj.getClass().isArray();
}
public static boolean isEmpty(Object[] array) {
return array == null || array.length == 0;
}
public static boolean containsElement(Object[] array, Object element) {
if (array == null) {
return false;
} else {
Object[] arr$ = array;
int len$ = array.length;
for (int i$ = 0; i$ < len$; ++i$) {
Object arrayEle = arr$[i$];
if (nullSafeEquals(arrayEle, element)) {
return true;
}
}
return false;
}
}
public static boolean containsConstant(Enum[] enumValues, String constant) {
return containsConstant(enumValues, constant, false);
}
public static boolean containsConstant(Enum[] enumValues, String constant, boolean caseSensitive) {
Enum[] arr$ = enumValues;
int len$ = enumValues.length;
int i$ = 0;
while (true) {
if (i$ >= len$) {
return false;
}
Enum candidate = arr$[i$];
if (caseSensitive) {
if (candidate.toString().equals(constant)) {
break;
}
} else if (candidate.toString().equalsIgnoreCase(constant)) {
break;
}
++i$;
}
return true;
}
public static > E caseInsensitiveValueOf(E[] enumValues, String constant) {
Enum[] arr$ = enumValues;
int len$ = enumValues.length;
for (int i$ = 0; i$ < len$; ++i$) {
Enum candidate = arr$[i$];
if (candidate.toString().equalsIgnoreCase(constant)) {
return (E) candidate;
}
}
throw new IllegalArgumentException(String.format("constant [%s] does not exist in enum opType %s",
new Object[] {constant, enumValues.getClass().getComponentType().getName()}));
}
public static A[] addObjectToArray(A[] array, O 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 (A[]) newArr;
}
public static Object[] toObjectArray(Object source) {
if (source instanceof Object[]) {
return (Object[]) source;
} else if (source == null) {
return new Object[0];
} else if (!source.getClass().isArray()) {
throw new IllegalArgumentException("Source is not an array: " + source);
} else {
int length = Array.getLength(source);
if (length == 0) {
return new Object[0];
} else {
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 boolean nullSafeEquals(Object o1, Object o2) {
if (o1 == o2) {
return true;
} else if (o1 != null && o2 != null) {
if (o1.equals(o2)) {
return true;
} else {
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;
}
} else {
return false;
}
}
public static int nullSafeHashCode(Object obj) {
if (obj == null) {
return 0;
} else {
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();
}
}
public static int nullSafeHashCode(Object[] array) {
if (array == null) {
return 0;
} else {
int hash = 7;
int arraySize = array.length;
for (int i = 0; i < arraySize; ++i) {
hash = 31 * hash + nullSafeHashCode(array[i]);
}
return hash;
}
}
public static int nullSafeHashCode(boolean[] array) {
if (array == null) {
return 0;
} else {
int hash = 7;
int arraySize = array.length;
for (int i = 0; i < arraySize; ++i) {
hash = 31 * hash + hashCode(array[i]);
}
return hash;
}
}
public static int nullSafeHashCode(byte[] array) {
if (array == null) {
return 0;
} else {
int hash = 7;
int arraySize = array.length;
for (int i = 0; i < arraySize; ++i) {
hash = 31 * hash + array[i];
}
return hash;
}
}
public static int nullSafeHashCode(char[] array) {
if (array == null) {
return 0;
} else {
int hash = 7;
int arraySize = array.length;
for (int i = 0; i < arraySize; ++i) {
hash = 31 * hash + array[i];
}
return hash;
}
}
public static int nullSafeHashCode(double[] array) {
if (array == null) {
return 0;
} else {
int hash = 7;
int arraySize = array.length;
for (int i = 0; i < arraySize; ++i) {
hash = 31 * hash + hashCode(array[i]);
}
return hash;
}
}
public static int nullSafeHashCode(float[] array) {
if (array == null) {
return 0;
} else {
int hash = 7;
int arraySize = array.length;
for (int i = 0; i < arraySize; ++i) {
hash = 31 * hash + hashCode(array[i]);
}
return hash;
}
}
public static int nullSafeHashCode(int[] array) {
if (array == null) {
return 0;
} else {
int hash = 7;
int arraySize = array.length;
for (int i = 0; i < arraySize; ++i) {
hash = 31 * hash + array[i];
}
return hash;
}
}
public static int nullSafeHashCode(long[] array) {
if (array == null) {
return 0;
} else {
int hash = 7;
int arraySize = array.length;
for (int i = 0; i < arraySize; ++i) {
hash = 31 * hash + hashCode(array[i]);
}
return hash;
}
}
public static int nullSafeHashCode(short[] array) {
if (array == null) {
return 0;
} else {
int hash = 7;
int arraySize = array.length;
for (int i = 0; i < arraySize; ++i) {
hash = 31 * hash + array[i];
}
return hash;
}
}
public static int hashCode(boolean bool) {
return bool ? 1231 : 1237;
}
public static int hashCode(double dbl) {
long bits = Double.doubleToLongBits(dbl);
return hashCode(bits);
}
public static int hashCode(float flt) {
return Float.floatToIntBits(flt);
}
public static int hashCode(long lng) {
return (int) (lng ^ lng >>> 32);
}
public static String identityToString(Object obj) {
return obj == null ? "" : obj.getClass().getName() + "@" + getIdentityHexString(obj);
}
public static String getIdentityHexString(Object obj) {
return Integer.toHexString(System.identityHashCode(obj));
}
public static String getDisplayString(Object obj) {
return obj == null ? "" : nullSafeToString(obj);
}
public static String nullSafeClassName(Object obj) {
return obj != null ? obj.getClass().getName() : "null";
}
public static String nullSafeToString(Object obj) {
if (obj == null) {
return "null";
} else if (obj instanceof String) {
return (String) obj;
} else if (obj instanceof Object[]) {
return nullSafeToString((Object[]) obj);
} else if (obj instanceof boolean[]) {
return nullSafeToString((boolean[]) obj);
} else if (obj instanceof byte[]) {
return nullSafeToString((byte[]) obj);
} else if (obj instanceof char[]) {
return nullSafeToString((char[]) obj);
} else if (obj instanceof double[]) {
return nullSafeToString((double[]) obj);
} else if (obj instanceof float[]) {
return nullSafeToString((float[]) obj);
} else if (obj instanceof int[]) {
return nullSafeToString((int[]) obj);
} else if (obj instanceof long[]) {
return nullSafeToString((long[]) obj);
} else if (obj instanceof short[]) {
return nullSafeToString((short[]) obj);
} else {
String str = obj.toString();
return str != null ? str : "";
}
}
public static String nullSafeToString(Object[] array) {
if (array == null) {
return "null";
} else {
int length = array.length;
if (length == 0) {
return "{}";
} else {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < length; ++i) {
if (i == 0) {
sb.append("{");
} else {
sb.append(", ");
}
sb.append(String.valueOf(array[i]));
}
sb.append("}");
return sb.toString();
}
}
}
public static String nullSafeToString(boolean[] array) {
if (array == null) {
return "null";
} else {
int length = array.length;
if (length == 0) {
return "{}";
} else {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < length; ++i) {
if (i == 0) {
sb.append("{");
} else {
sb.append(", ");
}
sb.append(array[i]);
}
sb.append("}");
return sb.toString();
}
}
}
public static String nullSafeToString(byte[] array) {
if (array == null) {
return "null";
} else {
int length = array.length;
if (length == 0) {
return "{}";
} else {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < length; ++i) {
if (i == 0) {
sb.append("{");
} else {
sb.append(", ");
}
sb.append(array[i]);
}
sb.append("}");
return sb.toString();
}
}
}
public static String nullSafeToString(char[] array) {
if (array == null) {
return "null";
} else {
int length = array.length;
if (length == 0) {
return "{}";
} else {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < length; ++i) {
if (i == 0) {
sb.append("{");
} else {
sb.append(", ");
}
sb.append("\'").append(array[i]).append("\'");
}
sb.append("}");
return sb.toString();
}
}
}
public static String nullSafeToString(double[] array) {
if (array == null) {
return "null";
} else {
int length = array.length;
if (length == 0) {
return "{}";
} else {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < length; ++i) {
if (i == 0) {
sb.append("{");
} else {
sb.append(", ");
}
sb.append(array[i]);
}
sb.append("}");
return sb.toString();
}
}
}
public static String nullSafeToString(float[] array) {
if (array == null) {
return "null";
} else {
int length = array.length;
if (length == 0) {
return "{}";
} else {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < length; ++i) {
if (i == 0) {
sb.append("{");
} else {
sb.append(", ");
}
sb.append(array[i]);
}
sb.append("}");
return sb.toString();
}
}
}
public static String nullSafeToString(int[] array) {
if (array == null) {
return "null";
} else {
int length = array.length;
if (length == 0) {
return "{}";
} else {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < length; ++i) {
if (i == 0) {
sb.append("{");
} else {
sb.append(", ");
}
sb.append(array[i]);
}
sb.append("}");
return sb.toString();
}
}
}
public static String nullSafeToString(long[] array) {
if (array == null) {
return "null";
} else {
int length = array.length;
if (length == 0) {
return "{}";
} else {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < length; ++i) {
if (i == 0) {
sb.append("{");
} else {
sb.append(", ");
}
sb.append(array[i]);
}
sb.append("}");
return sb.toString();
}
}
}
public static String nullSafeToString(short[] array) {
if (array == null) {
return "null";
} else {
int length = array.length;
if (length == 0) {
return "{}";
} else {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < length; ++i) {
if (i == 0) {
sb.append("{");
} else {
sb.append(", ");
}
sb.append(array[i]);
}
sb.append("}");
return sb.toString();
}
}
}
}
