Revert "Create a maven like project structure for java development. Make it OSGi compliant. Generate the flatbuffers code for testing (example)."

This reverts commit 9875b0e0f8.

java/com/google/flatbuffers/Table.java

@@ -0,0 +1,193 @@
+/*
+ * Copyright 2014 Google Inc. All rights reserved.
+ *
+ * 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 com.google.flatbuffers;
+
+import static com.google.flatbuffers.Constants.*;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.CharBuffer;
+import java.nio.charset.CharacterCodingException;
+import java.nio.charset.Charset;
+import java.nio.charset.CharsetDecoder;
+import java.nio.charset.CoderResult;
+
+/// @cond FLATBUFFERS_INTERNAL
+
+/**
+ * All tables in the generated code derive from this class, and add their own accessors.
+ */
+public class Table {
+  private final static ThreadLocal<CharsetDecoder> UTF8_DECODER = new ThreadLocal<CharsetDecoder>() {
+    @Override
+    protected CharsetDecoder initialValue() {
+      return Charset.forName("UTF-8").newDecoder();
+    }
+  };
+  private final static ThreadLocal<CharBuffer> CHAR_BUFFER = new ThreadLocal<CharBuffer>();
+  /** Used to hold the position of the `bb` buffer. */
+  protected int bb_pos;
+  /** The underlying ByteBuffer to hold the data of the Table. */
+  protected ByteBuffer bb;
+
+  /**
+   * Get the underlying ByteBuffer.
+   *
+   * @return Returns the Table's ByteBuffer.
+   */
+  public ByteBuffer getByteBuffer() { return bb; }
+
+  /**
+   * Look up a field in the vtable.
+   *
+   * @param vtable_offset An `int` offset to the vtable in the Table's ByteBuffer.
+   * @return Returns an offset into the object, or `0` if the field is not present.
+   */
+  protected int __offset(int vtable_offset) {
+    int vtable = bb_pos - bb.getInt(bb_pos);
+    return vtable_offset < bb.getShort(vtable) ? bb.getShort(vtable + vtable_offset) : 0;
+  }
+
+  /**
+   * Retrieve a relative offset.
+   *
+   * @param offset An `int` index into the Table's ByteBuffer containing the relative offset.
+   * @return Returns the relative offset stored at `offset`.
+   */
+  protected int __indirect(int offset) {
+    return offset + bb.getInt(offset);
+  }
+
+  /**
+   * Create a Java `String` from UTF-8 data stored inside the FlatBuffer.
+   *
+   * This allocates a new string and converts to wide chars upon each access,
+   * which is not very efficient. Instead, each FlatBuffer string also comes with an
+   * accessor based on __vector_as_bytebuffer below, which is much more efficient,
+   * assuming your Java program can handle UTF-8 data directly.
+   *
+   * @param offset An `int` index into the Table's ByteBuffer.
+   * @return Returns a `String` from the data stored inside the FlatBuffer at `offset`.
+   */
+  protected String __string(int offset) {
+    CharsetDecoder decoder = UTF8_DECODER.get();
+    decoder.reset();
+
+    offset += bb.getInt(offset);
+    ByteBuffer src = bb.duplicate().order(ByteOrder.LITTLE_ENDIAN);
+    int length = src.getInt(offset);
+    src.position(offset + SIZEOF_INT);
+    src.limit(offset + SIZEOF_INT + length);
+
+    int required = (int)((float)length * decoder.maxCharsPerByte());
+    CharBuffer dst = CHAR_BUFFER.get();
+    if (dst == null || dst.capacity() < required) {
+      dst = CharBuffer.allocate(required);
+      CHAR_BUFFER.set(dst);
+    }
+
+    dst.clear();
+
+    try {
+      CoderResult cr = decoder.decode(src, dst, true);
+      if (!cr.isUnderflow()) {
+        cr.throwException();
+      }
+    } catch (CharacterCodingException x) {
+      throw new Error(x);
+    }
+
+    return dst.flip().toString();
+  }
+
+  /**
+   * Get the length of a vector.
+   *
+   * @param offset An `int` index into the Table's ByteBuffer.
+   * @return Returns the length of the vector whose offset is stored at `offset`.
+   */
+  protected int __vector_len(int offset) {
+    offset += bb_pos;
+    offset += bb.getInt(offset);
+    return bb.getInt(offset);
+  }
+
+  /**
+   * Get the start data of a vector.
+   *
+   * @param offset An `int` index into the Table's ByteBuffer.
+   * @return Returns the start of the vector data whose offset is stored at `offset`.
+   */
+  protected int __vector(int offset) {
+    offset += bb_pos;
+    return offset + bb.getInt(offset) + SIZEOF_INT;  // data starts after the length
+  }
+
+  /**
+   * Get a whole vector as a ByteBuffer.
+   *
+   * This is efficient, since it only allocates a new {@link ByteBuffer} object,
+   * but does not actually copy the data, it still refers to the same bytes
+   * as the original ByteBuffer. Also useful with nested FlatBuffers, etc.
+   *
+   * @param vector_offset The position of the vector in the byte buffer
+   * @param elem_size The size of each element in the array
+   * @return The {@link ByteBuffer} for the array
+   */
+  protected ByteBuffer __vector_as_bytebuffer(int vector_offset, int elem_size) {
+    int o = __offset(vector_offset);
+    if (o == 0) return null;
+    ByteBuffer bb = this.bb.duplicate().order(ByteOrder.LITTLE_ENDIAN);
+    int vectorstart = __vector(o);
+    bb.position(vectorstart);
+    bb.limit(vectorstart + __vector_len(o) * elem_size);
+    return bb;
+  }
+
+  /**
+   * Initialize any Table-derived type to point to the union at the given `offset`.
+   *
+   * @param t A `Table`-derived type that should point to the union at `offset`.
+   * @param offset An `int` index into the Table's ByteBuffer.
+   * @return Returns the Table that points to the union at `offset`.
+   */
+  protected Table __union(Table t, int offset) {
+    offset += bb_pos;
+    t.bb_pos = offset + bb.getInt(offset);
+    t.bb = bb;
+    return t;
+  }
+
+  /**
+   * Check if a {@link ByteBuffer} contains a file identifier.
+   *
+   * @param bb A {@code ByteBuffer} to check if it contains the identifier
+   * `ident`.
+   * @param ident A `String` identifier of the FlatBuffer file.
+   * @return True if the buffer contains the file identifier
+   */
+  protected static boolean __has_identifier(ByteBuffer bb, String ident) {
+    if (ident.length() != FILE_IDENTIFIER_LENGTH)
+        throw new AssertionError("FlatBuffers: file identifier must be length " +
+                                 FILE_IDENTIFIER_LENGTH);
+    for (int i = 0; i < FILE_IDENTIFIER_LENGTH; i++) {
+      if (ident.charAt(i) != (char)bb.get(bb.position() + SIZEOF_INT + i)) return false;
+    }
+    return true;
+  }
+}
+
+/// @endcond