new decoder added

redisson/src/main/java/org/redisson/connection/decoder/MapCacheGetAllDecoder.java

@@ -0,0 +1,83 @@
+/**
+ * Copyright 2016 Nikita Koksharov
+ *
+ * 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.redisson.connection.decoder;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+import org.redisson.client.codec.LongCodec;
+import org.redisson.client.handler.State;
+import org.redisson.client.protocol.decoder.MultiDecoder;
+
+import io.netty.buffer.ByteBuf;
+
+/**
+ * 
+ * @author Nikita Koksharov
+ *
+ */
+public class MapCacheGetAllDecoder implements MultiDecoder<List<Object>> {
+
+    private final int shiftIndex;
+    private final List<Object> args;
+    private final boolean allowNulls;
+
+    public MapCacheGetAllDecoder(List<Object> args, int shiftIndex) {
+        this(args, shiftIndex, false);
+    }
+    
+    public MapCacheGetAllDecoder(List<Object> args, int shiftIndex, boolean allowNulls) {
+        this.args = args;
+        this.shiftIndex = shiftIndex;
+        this.allowNulls = allowNulls;
+    }
+
+    @Override
+    public Object decode(ByteBuf buf, State state) throws IOException {
+        return LongCodec.INSTANCE.getValueDecoder().decode(buf, state);
+    }
+
+    @Override
+    public boolean isApplicable(int paramNum, State state) {
+        return false;
+    }
+
+    @Override
+    public List<Object> decode(List<Object> parts, State state) {
+        if (parts.isEmpty()) {
+            return Collections.emptyList();
+        }
+        
+        List<Object> result = new ArrayList<Object>(parts.size()*5);
+        for (int index = 0; index < parts.size(); index += 4) {
+            Object value = parts.get(index);
+            if (!allowNulls && value == null) {
+                continue;
+            }
+            
+            Object key = args.get(index/4+shiftIndex);
+            result.add(key);
+            result.add(value);
+            result.add(parts.get(index+1));
+            result.add(parts.get(index+2));
+            result.add(parts.get(index+3));
+        }
+        return result;
+    }
+
+}