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

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

@@ -0,0 +1,111 @@
+/*
+ * ====================================================================
+ * 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;
+
+import java.util.Collection;
+
+public class Args {
+
+    public static void check(final boolean expression, final String message) {
+        if (!expression) {
+            throw new IllegalArgumentException(message);
+        }
+    }
+
+    public static void check(final boolean expression, final String message, final Object... args) {
+        if (!expression) {
+            throw new IllegalArgumentException(String.format(message, args));
+        }
+    }
+
+    public static <T> T notNull(final T argument, final String name) {
+        if (argument == null) {
+            throw new IllegalArgumentException(name + " may not be null");
+        }
+        return argument;
+    }
+
+    public static <T extends CharSequence> T notEmpty(final T argument, final String name) {
+        if (argument == null) {
+            throw new IllegalArgumentException(name + " may not be null");
+        }
+        if (TextUtils.isEmpty(argument)) {
+            throw new IllegalArgumentException(name + " may not be empty");
+        }
+        return argument;
+    }
+
+    public static <T extends CharSequence> T notBlank(final T argument, final String name) {
+        if (argument == null) {
+            throw new IllegalArgumentException(name + " may not be null");
+        }
+        if (TextUtils.isBlank(argument)) {
+            throw new IllegalArgumentException(name + " may not be blank");
+        }
+        return argument;
+    }
+
+    public static <E, T extends Collection<E>> T notEmpty(final T argument, final String name) {
+        if (argument == null) {
+            throw new IllegalArgumentException(name + " may not be null");
+        }
+        if (argument.isEmpty()) {
+            throw new IllegalArgumentException(name + " may not be empty");
+        }
+        return argument;
+    }
+
+    public static int positive(final int n, final String name) {
+        if (n <= 0) {
+            throw new IllegalArgumentException(name + " may not be negative or zero");
+        }
+        return n;
+    }
+
+    public static long positive(final long n, final String name) {
+        if (n <= 0) {
+            throw new IllegalArgumentException(name + " may not be negative or zero");
+        }
+        return n;
+    }
+
+    public static int notNegative(final int n, final String name) {
+        if (n < 0) {
+            throw new IllegalArgumentException(name + " may not be negative");
+        }
+        return n;
+    }
+
+    public static long notNegative(final long n, final String name) {
+        if (n < 0) {
+            throw new IllegalArgumentException(name + " may not be negative");
+        }
+        return n;
+    }
+
+}