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-rw-r--r--Android.bp1
-rw-r--r--telephony/java/android/telephony/DataFailCause.java7
-rw-r--r--telephony/java/com/android/internal/telephony/CarrierAppUtils.java2
-rw-r--r--telephony/java/com/android/internal/telephony/util/ArrayUtils.java229
4 files changed, 232 insertions, 7 deletions
diff --git a/Android.bp b/Android.bp
index ff1fe14b4930..2140061e8773 100644
--- a/Android.bp
+++ b/Android.bp
@@ -1629,7 +1629,6 @@ filegroup {
"core/java/android/util/Slog.java",
"core/java/android/util/TimeUtils.java",
"core/java/com/android/internal/os/SomeArgs.java",
- "core/java/com/android/internal/util/ArrayUtils.java",
"core/java/com/android/internal/util/DumpUtils.java",
"core/java/com/android/internal/util/FastXmlSerializer.java",
"core/java/com/android/internal/util/HexDump.java",
diff --git a/telephony/java/android/telephony/DataFailCause.java b/telephony/java/android/telephony/DataFailCause.java
index f771a17755af..e1c4bef0dd65 100644
--- a/telephony/java/android/telephony/DataFailCause.java
+++ b/telephony/java/android/telephony/DataFailCause.java
@@ -15,17 +15,14 @@
*/
package android.telephony;
-import android.annotation.IntDef;
import android.annotation.NonNull;
import android.annotation.SystemApi;
import android.content.Context;
import android.os.PersistableBundle;
-
import android.telephony.Annotation.DataFailureCause;
-import com.android.internal.util.ArrayUtils;
-import java.lang.annotation.Retention;
-import java.lang.annotation.RetentionPolicy;
+import com.android.internal.telephony.util.ArrayUtils;
+
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
diff --git a/telephony/java/com/android/internal/telephony/CarrierAppUtils.java b/telephony/java/com/android/internal/telephony/CarrierAppUtils.java
index d4ed9234569b..0630454cbf53 100644
--- a/telephony/java/com/android/internal/telephony/CarrierAppUtils.java
+++ b/telephony/java/com/android/internal/telephony/CarrierAppUtils.java
@@ -31,7 +31,7 @@ import android.util.Slog;
import com.android.internal.R;
import com.android.internal.annotations.VisibleForTesting;
-import com.android.internal.util.ArrayUtils;
+import com.android.internal.telephony.util.ArrayUtils;
import com.android.server.SystemConfig;
import java.util.ArrayList;
diff --git a/telephony/java/com/android/internal/telephony/util/ArrayUtils.java b/telephony/java/com/android/internal/telephony/util/ArrayUtils.java
new file mode 100644
index 000000000000..2905125c69cc
--- /dev/null
+++ b/telephony/java/com/android/internal/telephony/util/ArrayUtils.java
@@ -0,0 +1,229 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed 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.android.internal.telephony.util;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+
+import java.lang.reflect.Array;
+import java.util.Collection;
+import java.util.Map;
+import java.util.Objects;
+
+/** Utility methods for array operations. */
+public final class ArrayUtils {
+ private ArrayUtils() { /* cannot be instantiated */ }
+
+ /**
+ * Adds value to given array if not already present, providing set-like behavior.
+ */
+ @SuppressWarnings("unchecked")
+ public static @NonNull <T> T[] appendElement(Class<T> kind, @Nullable T[] array, T element) {
+ return appendElement(kind, array, element, false);
+ }
+
+ /**
+ * Adds value to given array.
+ */
+ @SuppressWarnings("unchecked")
+ public static @NonNull <T> T[] appendElement(Class<T> kind, @Nullable T[] array, T element,
+ boolean allowDuplicates) {
+ final T[] result;
+ final int end;
+ if (array != null) {
+ if (!allowDuplicates && contains(array, element)) return array;
+ end = array.length;
+ result = (T[]) Array.newInstance(kind, end + 1);
+ System.arraycopy(array, 0, result, 0, end);
+ } else {
+ end = 0;
+ result = (T[]) Array.newInstance(kind, 1);
+ }
+ result[end] = element;
+ return result;
+ }
+
+ /**
+ * Combine multiple arrays into a single array.
+ *
+ * @param kind The class of the array elements
+ * @param arrays The arrays to combine
+ * @param <T> The class of the array elements (inferred from kind).
+ * @return A single array containing all the elements of the parameter arrays.
+ */
+ @SuppressWarnings("unchecked")
+ public static @NonNull <T> T[] concatElements(Class<T> kind, @Nullable T[]... arrays) {
+ if (arrays == null || arrays.length == 0) {
+ return createEmptyArray(kind);
+ }
+
+ int totalLength = 0;
+ for (T[] item : arrays) {
+ if (item == null) {
+ continue;
+ }
+
+ totalLength += item.length;
+ }
+
+ // Optimization for entirely empty arrays.
+ if (totalLength == 0) {
+ return createEmptyArray(kind);
+ }
+
+ final T[] all = (T[]) Array.newInstance(kind, totalLength);
+ int pos = 0;
+ for (T[] item : arrays) {
+ if (item == null || item.length == 0) {
+ continue;
+ }
+ System.arraycopy(item, 0, all, pos, item.length);
+ pos += item.length;
+ }
+ return all;
+ }
+
+ private static @NonNull <T> T[] createEmptyArray(Class<T> kind) {
+ if (kind == String.class) {
+ return (T[]) EmptyArray.STRING;
+ } else if (kind == Object.class) {
+ return (T[]) EmptyArray.OBJECT;
+ }
+
+ return (T[]) Array.newInstance(kind, 0);
+ }
+
+ private static final class EmptyArray {
+ private EmptyArray() {}
+
+ public static final Object[] OBJECT = new Object[0];
+ public static final String[] STRING = new String[0];
+ }
+
+ /**
+ * Checks if {@code value} is in {@code array}.
+ */
+ public static boolean contains(@Nullable char[] array, char value) {
+ if (array == null) return false;
+ for (char element : array) {
+ if (element == value) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ /**
+ * Checks if {@code value} is in {@code array}.
+ */
+ public static <T> boolean contains(@Nullable Collection<T> cur, T val) {
+ return (cur != null) ? cur.contains(val) : false;
+ }
+
+ /**
+ * Checks if {@code value} is in {@code array}.
+ */
+ public static boolean contains(@Nullable int[] array, int value) {
+ if (array == null) return false;
+ for (int element : array) {
+ if (element == value) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ /**
+ * Checks if {@code value} is in {@code array}.
+ */
+ public static boolean contains(@Nullable long[] array, long value) {
+ if (array == null) return false;
+ for (long element : array) {
+ if (element == value) {
+ return true;
+ }
+ }
+ return false;
+ }
+
+ /**
+ * Checks if {@code value} is in {@code array}.
+ */
+ public static <T> boolean contains(@Nullable T[] array, T value) {
+ return indexOf(array, value) != -1;
+ }
+
+ /**
+ * Return first index of {@code value} in {@code array}, or {@code -1} if
+ * not found.
+ */
+ public static <T> int indexOf(@Nullable T[] array, T value) {
+ if (array == null) return -1;
+ for (int i = 0; i < array.length; i++) {
+ if (Objects.equals(array[i], value)) return i;
+ }
+ return -1;
+ }
+
+ /**
+ * Checks if given array is null or has zero elements.
+ */
+ public static boolean isEmpty(@Nullable Collection<?> array) {
+ return array == null || array.isEmpty();
+ }
+
+ /**
+ * Checks if given map is null or has zero elements.
+ */
+ public static boolean isEmpty(@Nullable Map<?, ?> map) {
+ return map == null || map.isEmpty();
+ }
+
+ /**
+ * Checks if given array is null or has zero elements.
+ */
+ public static <T> boolean isEmpty(@Nullable T[] array) {
+ return array == null || array.length == 0;
+ }
+
+ /**
+ * Checks if given array is null or has zero elements.
+ */
+ public static boolean isEmpty(@Nullable int[] array) {
+ return array == null || array.length == 0;
+ }
+
+ /**
+ * Checks if given array is null or has zero elements.
+ */
+ public static boolean isEmpty(@Nullable long[] array) {
+ return array == null || array.length == 0;
+ }
+
+ /**
+ * Checks if given array is null or has zero elements.
+ */
+ public static boolean isEmpty(@Nullable byte[] array) {
+ return array == null || array.length == 0;
+ }
+
+ /**
+ * Checks if given array is null or has zero elements.
+ */
+ public static boolean isEmpty(@Nullable boolean[] array) {
+ return array == null || array.length == 0;
+ }
+}
generated by cgit v1.2.3-59-g8ed1b (git 2.39.0) at 2025-12-03 21:21:07 +0000