pt 1 in reviving the android build (copied from pm 28a1, wish me luck)

mobile/android/thirdparty/ch/boye/httpclientandroidlib/util/LangUtils.java

@@ -0,0 +1,101 @@
+/*
+ * ====================================================================
+ * Licensed to the Apache Software Foundation (ASF) 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.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation.  For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ *
+ */
+
+package ch.boye.httpclientandroidlib.util;
+
+/**
+ * A set of utility methods to help produce consistent
+ * {@link Object#equals equals} and {@link Object#hashCode hashCode} methods.
+ *
+ *
+ * @since 4.0
+ */
+public final class LangUtils {
+
+    public static final int HASH_SEED = 17;
+    public static final int HASH_OFFSET = 37;
+
+    /** Disabled default constructor. */
+    private LangUtils() {
+    }
+
+    public static int hashCode(final int seed, final int hashcode) {
+        return seed * HASH_OFFSET + hashcode;
+    }
+
+    public static int hashCode(final int seed, final boolean b) {
+        return hashCode(seed, b ? 1 : 0);
+    }
+
+    public static int hashCode(final int seed, final Object obj) {
+        return hashCode(seed, obj != null ? obj.hashCode() : 0);
+    }
+
+    /**
+     * Check if two objects are equal.
+     *
+     * @param obj1 first object to compare, may be {@code null}
+     * @param obj2 second object to compare, may be {@code null}
+     * @return {@code true} if the objects are equal or both null
+     */
+    public static boolean equals(final Object obj1, final Object obj2) {
+        return obj1 == null ? obj2 == null : obj1.equals(obj2);
+    }
+
+    /**
+     * Check if two object arrays are equal.
+     * <p>
+     * <ul>
+     * <li>If both parameters are null, return {@code true}</li>
+     * <li>If one parameter is null, return {@code false}</li>
+     * <li>If the array lengths are different, return {@code false}</li>
+     * <li>Compare array elements using .equals(); return {@code false} if any comparisons fail.</li>
+     * <li>Return {@code true}</li>
+     * </ul>
+     *
+     * @param a1 first array to compare, may be {@code null}
+     * @param a2 second array to compare, may be {@code null}
+     * @return {@code true} if the arrays are equal or both null
+     */
+    public static boolean equals(final Object[] a1, final Object[] a2) {
+        if (a1 == null) {
+            return a2 == null;
+        } else {
+            if (a2 != null && a1.length == a2.length) {
+                for (int i = 0; i < a1.length; i++) {
+                    if (!equals(a1[i], a2[i])) {
+                        return false;
+                    }
+                }
+                return true;
+            } else {
+                return false;
+            }
+        }
+    }
+
+}