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1 package jp.ac.u_ryukyu.ie.cr.jungle.store.operations;
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2
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3 import jp.ac.u_ryukyu.ie.cr.jungle.store.Command;
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4 import jp.ac.u_ryukyu.ie.cr.jungle.transaction.node.TreeNode;
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5 import jp.ac.u_ryukyu.ie.cr.jungle.transaction.node.TreeNodeChildren;
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6 import jp.ac.u_ryukyu.ie.cr.jungle.util.Either;
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7 import jp.ac.u_ryukyu.ie.cr.jungle.util.jungleError.Error;
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8
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9 import java.nio.ByteBuffer;
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10
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11 /**
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12 * Created by e115731 on 2017/01/04.
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13 */
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14 public class RedBlackTreeDeleteChildAtOperation implements NodeOperation {
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15
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16 private String key;
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17 private ByteBuffer value;
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18
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19 public RedBlackTreeDeleteChildAtOperation(String key, ByteBuffer value) {
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20 this.key = key;
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21 this.value = value;
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22 }
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23
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24 @Override
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25 public Command getCommand() {
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26 return Command.APPEND_CHILD_AND_PUT_ATTRIBUTE;
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27 }
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28
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29 @Override
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30 public Either<Error, TreeNode> invoke(TreeNode target) {
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31 TreeNodeChildren children = target.getChildren();
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32 return children.matchingChildDeleteAt(key, value);
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33 }
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34
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35 @Override
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36 public int getPosition() {
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37 return -2;
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38 }
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39
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40 @Override
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41 public String getKey() {
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42 return null;
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43 }
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44
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45 @Override
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46 public ByteBuffer getValue() {
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47 return null;
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48 }
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49 }
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