issue 21

pom.xml

@@ -58,8 +58,8 @@
         <artifactId>maven-compiler-plugin</artifactId>
         <version>3.1</version>
         <configuration>
-          <source>1.5</source>
-          <target>1.5</target>
+          <source>1.8</source>
+          <target>1.8</target>
         </configuration>
       </plugin>
       <plugin>

src/main/java/org/noggit/IteratorWriter.java

@@ -0,0 +1,64 @@
+/**
+ *  Copyright 2006- Yonik Seeley
+ *
+ * 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.noggit;
+
+import java.io.IOException;
+
+/**
+ * Interface to help do push writing to an array
+ */
+public interface IteratorWriter {
+    /**
+     * @param iw after this method returns , the ItemWriter Object is invalid
+     *           Do not hold a reference to this object
+     */
+    void writeIter(ItemWriter iw) throws IOException;
+
+    interface ItemWriter {
+        /**
+         * The item could be any supported type
+         */
+        ItemWriter add(Object o) throws IOException;
+
+        default ItemWriter add(int v) throws IOException {
+            add((Integer) v);
+            return this;
+        }
+
+
+        default ItemWriter add(long v) throws IOException {
+            add((Long) v);
+            return this;
+        }
+
+
+        default ItemWriter add(float v) throws IOException {
+            add((Float) v);
+            return this;
+        }
+
+        default ItemWriter add(double v) throws IOException {
+            add((Double) v);
+            return this;
+        }
+
+        default ItemWriter add(boolean v) throws IOException {
+            add((Boolean) v);
+            return this;
+        }
+    }
+
+}

src/main/java/org/noggit/MapWriter.java

@@ -0,0 +1,78 @@
+package org.noggit;
+
+/**
+ *  Copyright 2006- Yonik Seeley
+ *
+ * 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.
+ */
+
+import java.io.IOException;
+
+/**
+ * Use this class to push all entries of a Map into an output.
+ * This avoids creating map instances and is supposed to be memory efficient.
+ * If the entries are primitives, unnecessary boxing is also avoided
+ */
+public interface MapWriter  {
+
+
+
+    void writeMap(EntryWriter ew) throws IOException;
+
+    /**
+     * An interface to push one entry at a time to the output
+     */
+    interface EntryWriter {
+
+        /**
+         * Writes a key value into the map
+         *
+         * @param k The key
+         * @param v The value can be any supported object
+         */
+        EntryWriter put(String k, Object v) throws IOException;
+
+        default EntryWriter putIfNotNull(String k, Object v) throws IOException {
+            if(v != null) put(k,v);
+            return this;
+        }
+
+
+        default EntryWriter put(String k, int v) throws IOException {
+            put(k, (Integer) v);
+            return this;
+        }
+
+
+        default EntryWriter put(String k, long v) throws IOException {
+            put(k, (Long) v);
+            return this;
+        }
+
+
+        default EntryWriter put(String k, float v) throws IOException {
+            put(k, (Float) v);
+            return this;
+        }
+
+        default EntryWriter put(String k, double v) throws IOException {
+            put(k, (Double) v);
+            return this;
+        }
+
+        default EntryWriter put(String k, boolean v) throws IOException {
+            put(k, (Boolean) v);
+            return this;
+        }
+    }
+}