Refactor the writing of sections more object oriented.

src/de/inetsoftware/jwebassembly/binary/SectionEntry.java

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2018 Volker Berlin (i-net software)
+ *
+ * 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 de.inetsoftware.jwebassembly.binary;
+
+import java.io.IOException;
+
+/**
+ * Signature for an entry in a section
+ * 
+ * @author Volker Berlin
+ */
+abstract class SectionEntry {
+
+    /**
+     * Write this single entry to a section
+     * 
+     * @param stream
+     *            the target
+     * @throws IOException
+     *             if any I/O error occur
+     */
+    abstract void writeSectionEntry( WasmOutputStream stream ) throws IOException;
+}