import MessagePack for Java implementation plan 3

java-plan3/src/org/msgpack/UnpackIterator.java

@@ -0,0 +1,66 @@
+//
+// MessagePack for Java
+//
+// Copyright (C) 2009 FURUHASHI Sadayuki
+//
+//    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 org.msgpack;
+
+import java.io.IOException;
+import java.util.Iterator;
+import java.util.NoSuchElementException;
+
+public class UnpackIterator implements Iterator<Object> {
+	private Unpacker pac;
+	private boolean have;
+	private Object data;
+
+	UnpackIterator(Unpacker pac) {
+		this.pac = pac;
+		this.have = false;
+	}
+
+	public boolean hasNext() {
+		if(have) { return true; }
+		try {
+			while(true) {
+				if(pac.execute()) {
+					data = pac.getData();
+					pac.reset();
+					have = true;
+					return true;
+				}
+
+				if(!pac.fill()) {
+					return false;
+				}
+			}
+		} catch (IOException e) {
+			return false;
+		}
+	}
+
+	public Object next() {
+		if(!have && !hasNext()) {
+			throw new NoSuchElementException();
+		}
+		have = false;
+		return data;
+	}
+
+	public void remove() {
+		throw new UnsupportedOperationException();
+	}
+}
+