Java KeyValue.makeColumn方法代碼示例

import org.apache.hadoop.hbase.KeyValue; //導入方法依賴的package包/類
/**
 * Extract columns values from the current record. This method returns
 * null if any of the columns are not found.
 *
 * Override this method if you want to deal with nulls differently.
 *
 * @param r
 * @return array of byte values
 */
protected byte[][] extractKeyValues(Result r) {
  byte[][] keyVals = null;
  ArrayList<byte[]> foundList = new ArrayList<byte[]>();
  int numCols = columns.length;
  if (numCols > 0) {
    for (Cell value: r.listCells()) {
      byte [] column = KeyValue.makeColumn(CellUtil.cloneFamily(value),
          CellUtil.cloneQualifier(value));
      for (int i = 0; i < numCols; i++) {
        if (Bytes.equals(column, columns[i])) {
          foundList.add(CellUtil.cloneValue(value));
          break;
        }
      }
    }
    if(foundList.size() == numCols) {
      keyVals = foundList.toArray(new byte[numCols][]);
    }
  }
  return keyVals;
}
 

import org.apache.hadoop.hbase.KeyValue; //導入方法依賴的package包/類
/**
 * Extract columns values from the current record. This method returns
 * null if any of the columns are not found.
 * <p>
 * Override this method if you want to deal with nulls differently.
 *
 * @param r  The current values.
 * @return Array of byte values.
 */
protected byte[][] extractKeyValues(Result r) {
  byte[][] keyVals = null;
  ArrayList<byte[]> foundList = new ArrayList<byte[]>();
  int numCols = columns.length;
  if (numCols > 0) {
    for (Cell value: r.listCells()) {
      byte [] column = KeyValue.makeColumn(CellUtil.cloneFamily(value),
          CellUtil.cloneQualifier(value));
      for (int i = 0; i < numCols; i++) {
        if (Bytes.equals(column, columns[i])) {
          foundList.add(CellUtil.cloneValue(value));
          break;
        }
      }
    }
    if(foundList.size() == numCols) {
      keyVals = foundList.toArray(new byte[numCols][]);
    }
  }
  return keyVals;
}
 

import org.apache.hadoop.hbase.KeyValue; //導入方法依賴的package包/類
public static Range[] fromFilter(SingleColumnValueFilter filter) {
  if (!(filter.getComparator() instanceof BinaryComparator)) {
    return new Range[0];
  }

  byte[] column = KeyValue.makeColumn(filter.getFamily(), filter.getQualifier());
  CompareOp compareOp = filter.getOperator();
  byte[] value = filter.getComparator().getValue();

  if (compareOp == CompareOp.NOT_EQUAL) {
    return new Range[] { new Range(column, null, CompareOp.NO_OP, value, CompareOp.LESS),
        new Range(column, value, CompareOp.GREATER, null, CompareOp.NO_OP) };
  } else {
    switch (compareOp) {
    case EQUAL:
    case GREATER_OR_EQUAL:
    case GREATER:
      return new Range[] { new Range(column, value, compareOp, null, CompareOp.NO_OP) };
    case LESS:
    case LESS_OR_EQUAL:
      return new Range[] { new Range(column, null, CompareOp.NO_OP, value, compareOp) };
    default:
      return new Range[0];
    }
  }
}
 

import org.apache.hadoop.hbase.KeyValue; //導入方法依賴的package包/類
private static void printLine(Result r, Map<byte[], DataType> columnInfoMap) {
  StringBuilder sb = new StringBuilder();
  sb.append("row=" + Bytes.toString(r.getRow()));
  byte[] tmp = null;
  for (KeyValue kv : r.list()) {
    tmp = KeyValue.makeColumn(kv.getFamily(), kv.getQualifier());
    sb.append("," + Bytes.toString(tmp) + "=");

    if (columnInfoMap == null || columnInfoMap.isEmpty()) {
      sb.append(Bytes.toString(kv.getValue()));
    } else {
      switch (columnInfoMap.get(tmp)) {
      case DOUBLE:
        sb.append(Bytes.toDouble(kv.getValue()));
        break;
      case LONG:
        sb.append(Bytes.toLong(kv.getValue()));
        break;
      case INT:
        sb.append(Bytes.toInt(kv.getValue()));
        break;
      case STRING:
        sb.append(Bytes.toString(kv.getValue()));
        break;
      default:
        sb.append(Bytes.toString(kv.getValue()));
        break;
      }
    }
  }

  System.out.println(sb.toString());
}
 

import org.apache.hadoop.hbase.KeyValue; //導入方法依賴的package包/類
/**
 * Constructor
 * @param column
 * @param qualifier
 * @param timestamp
 * @param value
 */
public CellModel(byte[] column, byte[] qualifier, long timestamp,
    byte[] value) {
  this.column = KeyValue.makeColumn(column, qualifier);
  this.timestamp = timestamp;
  this.value = value;
}