[cooja] memory: Implementation of simple array-backed memory class 'ArrayMamory'

tools/cooja/java/org/contikios/cooja/mote/memory/ArrayMemory.java

@@ -0,0 +1,126 @@
+/*
+ * Copyright (c) 2013, Enrico Joerns
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+package org.contikios.cooja.mote.memory;
+
+import java.util.Arrays;
+import java.util.Map;
+
+/**
+ * A memory that is backed by an array.
+ *
+ * @author Enrico Joerns
+ */
+public class ArrayMemory implements MemoryInterface {
+
+  private final byte memory[];
+  private final long startAddress;
+  private final MemoryLayout layout;
+  private final boolean readonly;
+  private final Map<String, Symbol> symbols;// XXX Allow to set symbols
+
+  public ArrayMemory(long address, int size, MemoryLayout layout, Map<String, Symbol> symbols) {
+    this(address, layout, new byte[size], symbols);
+  }
+
+  public ArrayMemory(long address, MemoryLayout layout, byte[] memory, Map<String, Symbol> symbols) {
+    this(address, layout, memory, false, symbols);
+  }
+
+  public ArrayMemory(long address, MemoryLayout layout, byte[] memory, boolean readonly, Map<String, Symbol> symbols) {
+    this.startAddress = address;
+    this.layout = layout;
+    this.memory = memory;
+    this.readonly = readonly;
+    this.symbols = symbols;
+  }
+
+  @Override
+  public byte[] getMemory() {
+    return memory;
+  }
+
+  /**
+   * XXX Should addr be the relative or the absolute address of this section?
+   * @param addr
+   * @param size
+   * @return
+   * @throws org.contikios.cooja.mote.memory.MemoryInterface.MoteMemoryException 
+   */
+  @Override
+  public byte[] getMemorySegment(long addr, int size) throws MoteMemoryException {
+    byte[] ret = new byte[size];
+    System.arraycopy(memory, (int) (addr - startAddress), ret, 0, size);
+    return ret;
+  }
+
+  @Override
+  public void setMemorySegment(long addr, byte[] data) throws MoteMemoryException {
+    if (readonly) {
+      throw new MoteMemoryException("Invalid write access for readonly memory");
+    }
+    System.arraycopy(data, 0, memory, (int) (addr - startAddress), data.length);
+  }
+
+  @Override
+  public void clearMemory() {
+    Arrays.fill(memory, (byte) 0x00);
+  }
+
+  @Override
+  public long getStartAddr() {
+    return startAddress;
+  }
+
+  @Override
+  public int getTotalSize() {
+    return memory.length;
+  }
+
+  @Override
+  public Map<String, Symbol> getSymbolMap() {
+    return symbols;
+  }
+
+  @Override
+  public MemoryLayout getLayout() {
+    return layout;
+  }
+
+  @Override
+  public boolean addSegmentMonitor(SegmentMonitor.EventType flag, long address, int size, SegmentMonitor monitor) {
+    throw new UnsupportedOperationException("Not supported yet.");
+  }
+
+  @Override
+  public boolean removeSegmentMonitor(long address, int size, SegmentMonitor monitor) {
+    throw new UnsupportedOperationException("Not supported yet.");
+  }
+  
+}