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

mobile/android/thirdparty/ch/boye/httpclientandroidlib/protocol/BasicHttpContext.java

@@ -0,0 +1,95 @@
+/*
+ * ====================================================================
+ * 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.protocol;
+
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+import ch.boye.httpclientandroidlib.annotation.ThreadSafe;
+import ch.boye.httpclientandroidlib.util.Args;
+
+/**
+ * Default implementation of {@link HttpContext}.
+ * <p>
+ * Please note instances of this class can be thread unsafe if the
+ * parent context is not thread safe.
+ *
+ * @since 4.0
+ */
+@ThreadSafe
+public class BasicHttpContext implements HttpContext {
+
+    private final HttpContext parentContext;
+    private final Map<String, Object> map;
+
+    public BasicHttpContext() {
+        this(null);
+    }
+
+    public BasicHttpContext(final HttpContext parentContext) {
+        super();
+        this.map = new ConcurrentHashMap<String, Object>();
+        this.parentContext = parentContext;
+    }
+
+    public Object getAttribute(final String id) {
+        Args.notNull(id, "Id");
+        Object obj = this.map.get(id);
+        if (obj == null && this.parentContext != null) {
+            obj = this.parentContext.getAttribute(id);
+        }
+        return obj;
+    }
+
+    public void setAttribute(final String id, final Object obj) {
+        Args.notNull(id, "Id");
+        if (obj != null) {
+            this.map.put(id, obj);
+        } else {
+            this.map.remove(id);
+        }
+    }
+
+    public Object removeAttribute(final String id) {
+        Args.notNull(id, "Id");
+        return this.map.remove(id);
+    }
+
+    /**
+     * @since 4.2
+     */
+    public void clear() {
+        this.map.clear();
+    }
+
+    @Override
+    public String toString() {
+        return this.map.toString();
+    }
+
+}