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

mobile/android/thirdparty/ch/boye/httpclientandroidlib/message/BasicHeaderElementIterator.java

@@ -0,0 +1,151 @@
+/*
+ * ====================================================================
+ * 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.message;
+
+import java.util.NoSuchElementException;
+
+import ch.boye.httpclientandroidlib.FormattedHeader;
+import ch.boye.httpclientandroidlib.Header;
+import ch.boye.httpclientandroidlib.HeaderElement;
+import ch.boye.httpclientandroidlib.HeaderElementIterator;
+import ch.boye.httpclientandroidlib.HeaderIterator;
+import ch.boye.httpclientandroidlib.annotation.NotThreadSafe;
+import ch.boye.httpclientandroidlib.util.Args;
+import ch.boye.httpclientandroidlib.util.CharArrayBuffer;
+
+/**
+ * Basic implementation of a {@link HeaderElementIterator}.
+ *
+ * @since 4.0
+ */
+@NotThreadSafe
+public class BasicHeaderElementIterator implements HeaderElementIterator {
+
+    private final HeaderIterator headerIt;
+    private final HeaderValueParser parser;
+
+    private HeaderElement currentElement = null;
+    private CharArrayBuffer buffer = null;
+    private ParserCursor cursor = null;
+
+    /**
+     * Creates a new instance of BasicHeaderElementIterator
+     */
+    public BasicHeaderElementIterator(
+            final HeaderIterator headerIterator,
+            final HeaderValueParser parser) {
+        this.headerIt = Args.notNull(headerIterator, "Header iterator");
+        this.parser = Args.notNull(parser, "Parser");
+    }
+
+
+    public BasicHeaderElementIterator(final HeaderIterator headerIterator) {
+        this(headerIterator, BasicHeaderValueParser.INSTANCE);
+    }
+
+
+    private void bufferHeaderValue() {
+        this.cursor = null;
+        this.buffer = null;
+        while (this.headerIt.hasNext()) {
+            final Header h = this.headerIt.nextHeader();
+            if (h instanceof FormattedHeader) {
+                this.buffer = ((FormattedHeader) h).getBuffer();
+                this.cursor = new ParserCursor(0, this.buffer.length());
+                this.cursor.updatePos(((FormattedHeader) h).getValuePos());
+                break;
+            } else {
+                final String value = h.getValue();
+                if (value != null) {
+                    this.buffer = new CharArrayBuffer(value.length());
+                    this.buffer.append(value);
+                    this.cursor = new ParserCursor(0, this.buffer.length());
+                    break;
+                }
+            }
+        }
+    }
+
+    private void parseNextElement() {
+        // loop while there are headers left to parse
+        while (this.headerIt.hasNext() || this.cursor != null) {
+            if (this.cursor == null || this.cursor.atEnd()) {
+                // get next header value
+                bufferHeaderValue();
+            }
+            // Anything buffered?
+            if (this.cursor != null) {
+                // loop while there is data in the buffer
+                while (!this.cursor.atEnd()) {
+                    final HeaderElement e = this.parser.parseHeaderElement(this.buffer, this.cursor);
+                    if (!(e.getName().length() == 0 && e.getValue() == null)) {
+                        // Found something
+                        this.currentElement = e;
+                        return;
+                    }
+                }
+                // if at the end of the buffer
+                if (this.cursor.atEnd()) {
+                    // discard it
+                    this.cursor = null;
+                    this.buffer = null;
+                }
+            }
+        }
+    }
+
+    public boolean hasNext() {
+        if (this.currentElement == null) {
+            parseNextElement();
+        }
+        return this.currentElement != null;
+    }
+
+    public HeaderElement nextElement() throws NoSuchElementException {
+        if (this.currentElement == null) {
+            parseNextElement();
+        }
+
+        if (this.currentElement == null) {
+            throw new NoSuchElementException("No more header elements available");
+        }
+
+        final HeaderElement element = this.currentElement;
+        this.currentElement = null;
+        return element;
+    }
+
+    public final Object next() throws NoSuchElementException {
+        return nextElement();
+    }
+
+    public void remove() throws UnsupportedOperationException {
+        throw new UnsupportedOperationException("Remove not supported");
+    }
+
+}