hbase support

src/main/java/com/alibaba/druid/common/jdbc/LocalResultSet.java

@@ -0,0 +1,59 @@
+package com.alibaba.druid.common.jdbc;
+
+import java.sql.SQLException;
+import java.sql.Statement;
+import java.util.ArrayList;
+import java.util.List;
+
+public class LocalResultSet extends ResultSetBase {
+
+    private int            rowIndex = -1;
+    private List<Object[]> rows     = new ArrayList<Object[]>();
+
+    public LocalResultSet(Statement statement){
+        super(statement);
+    }
+
+    public List<Object[]> getRows() {
+        return rows;
+    }
+
+    @Override
+    public synchronized boolean next() throws SQLException {
+        if (closed) {
+            throw new SQLException();
+        }
+
+        if (rowIndex < rows.size() - 1) {
+            rowIndex++;
+            return true;
+        }
+        return false;
+    }
+    
+    public Object getObjectInternal(int columnIndex) {
+        Object[] row = rows.get(rowIndex);
+        Object obj = row[columnIndex - 1];
+        return obj;
+    }
+
+    @Override
+    public synchronized boolean previous() throws SQLException {
+        if (closed) {
+            throw new SQLException();
+        }
+
+        if (rowIndex > 0) {
+            rowIndex--;
+            return true;
+        }
+        return false;
+    }
+
+    @Override
+    public void updateObject(int columnIndex, Object x) throws SQLException {
+        Object[] row = rows.get(rowIndex);
+        row[columnIndex - 1] = x;
+    }
+
+}

src/main/java/com/alibaba/druid/common/jdbc/ResultSetBase.java

@@ -11,6 +11,7 @@ import java.sql.Date;
 import java.sql.NClob;
 import java.sql.Ref;
 import java.sql.ResultSet;
+import java.sql.ResultSetMetaData;
 import java.sql.RowId;
 import java.sql.SQLException;
 import java.sql.SQLFeatureNotSupportedException;
@@ -24,14 +25,15 @@ import java.util.Map;
 
 public abstract class ResultSetBase implements ResultSet {
 
-    protected boolean  closed         = false;
-    protected boolean  wasNull        = false;
-    private SQLWarning warning;
-    private String     cursorName;
-    private int        fetchSize      = 0;
-    private int        fetchDirection = 0;
+    protected boolean         closed         = false;
+    protected boolean         wasNull        = false;
+    private SQLWarning        warning;
+    private String            cursorName;
+    private int               fetchSize      = 0;
+    private int               fetchDirection = 0;
 
-    private Statement  statement;
+    private Statement         statement;
+    protected ResultSetMetaData metaData;
 
     public ResultSetBase(Statement statement){
         super();
@@ -302,7 +304,14 @@ public abstract class ResultSetBase implements ResultSet {
         return wasNull;
     }
 
-    public abstract Object getObjectInternal(int columnIndex) throws SQLException;
+    public Object getObjectInternal(int columnIndex) throws SQLException {
+        if (this.getMetaData() != null) {
+            String columName = this.getMetaData().getColumnName(columnIndex);
+            return getObject(columName);
+        }
+        
+        return null;
+    }
 
     @Override
     public Object getObject(int columnIndex) throws SQLException {
@@ -1157,4 +1166,13 @@ public abstract class ResultSetBase implements ResultSet {
 
         return 0;
     }
+    
+    @Override
+    public ResultSetMetaData getMetaData() throws SQLException {
+        if (closed) {
+            throw new SQLException("resultSet closed");
+        }
+
+        return metaData;
+    }
 }

src/main/java/com/alibaba/druid/hbase/HBaseResultSet.java

@@ -16,7 +16,7 @@ import com.alibaba.druid.common.jdbc.ResultSetMetaDataBase.ColumnMetaData;
 import com.alibaba.druid.hbase.mapping.HMapping;
 import com.alibaba.druid.util.JdbcUtils;
 
-public class HBaseResultSet extends ResultSetBase {
+public class HBaseResultSet extends ResultSetBase implements HResultSet {
 
     private HStatementInterface statement;
     private ResultScanner       scanner;
@@ -24,8 +24,6 @@ public class HBaseResultSet extends ResultSetBase {
     private Result              result;
     private byte[]              family = Bytes.toBytes("d");
 
-    private HResultSetMetaData  metaData;
-
     private HMapping            mapping;
 
     public HBaseResultSet(HStatementInterface statement, HTableInterface htable, ResultScanner scanner){
@@ -60,7 +58,7 @@ public class HBaseResultSet extends ResultSetBase {
 
     @Override
     public HResultSetMetaData getMetaData() throws SQLException {
-        return metaData;
+        return (HResultSetMetaData) metaData;
     }
 
     public void setMetaData(HResultSetMetaData metaData) {
@@ -78,7 +76,7 @@ public class HBaseResultSet extends ResultSetBase {
 
     @Override
     public Object getObjectInternal(int columnIndex) throws SQLException {
-        ColumnMetaData column = this.metaData.getColumn(columnIndex);
+        ColumnMetaData column = this.getMetaData().getColumn(columnIndex);
         return getObjectInternal(column.getColumnName(), column.getColumnType());
     }
 
@@ -129,7 +127,7 @@ public class HBaseResultSet extends ResultSetBase {
 
     @Override
     public byte[] getBytes(int columnIndex) throws SQLException {
-        ColumnMetaData column = this.metaData.getColumn(columnIndex);
+        ColumnMetaData column = this.getMetaData().getColumn(columnIndex);
         return getBytes(column.getColumnName());
     }
 

src/main/java/com/alibaba/druid/hbase/HEngine.java

@@ -1,10 +1,12 @@
 package com.alibaba.druid.hbase;
 
+import java.io.IOException;
 import java.util.Properties;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ConcurrentMap;
 
 import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hbase.client.HBaseAdmin;
 import org.apache.hadoop.hbase.client.HTableInterface;
 import org.apache.hadoop.hbase.client.HTablePool;
 
@@ -77,5 +79,9 @@ public class HEngine {
         }
         return tablePool.getTable(tableName);
     }
+    
+    public HBaseAdmin getHBaseAdmin() throws IOException {
+        return new HBaseAdmin(this.config);
+    }
 
 }

src/main/java/com/alibaba/druid/hbase/HPreparedStatement.java

@@ -11,6 +11,7 @@ import com.alibaba.druid.common.jdbc.ResultSetMetaDataBase.ColumnMetaData;
 import com.alibaba.druid.hbase.exec.ExecutePlan;
 import com.alibaba.druid.hbase.exec.InsertExecutePlan;
 import com.alibaba.druid.hbase.exec.SingleTableQueryExecutePlan;
+import com.alibaba.druid.hbase.hbql.ast.HBQLShowStatement;
 import com.alibaba.druid.sql.SQLUtils;
 import com.alibaba.druid.sql.ast.SQLExpr;
 import com.alibaba.druid.sql.ast.SQLStatement;
@@ -113,6 +114,8 @@ public class HPreparedStatement extends PreparedStatementBase implements Prepare
             }
 
             this.executePlan = insertExecutePlan;
+        } else if (sqlStmt instanceof HBQLShowStatement) {
+            
         } else {
             throw new SQLException("TODO");
         }

src/main/java/com/alibaba/druid/hbase/HResultSet.java

@@ -0,0 +1,8 @@
+package com.alibaba.druid.hbase;
+
+import java.sql.ResultSet;
+
+
+public interface HResultSet extends ResultSet {
+
+}

src/main/java/com/alibaba/druid/hbase/exec/ExecutePlan.java

@@ -3,11 +3,11 @@ package com.alibaba.druid.hbase.exec;
 import java.sql.SQLException;
 
 import com.alibaba.druid.hbase.HPreparedStatement;
-import com.alibaba.druid.hbase.HBaseResultSet;
+import com.alibaba.druid.hbase.HResultSet;
 
 public interface ExecutePlan {
 
-    HBaseResultSet executeQuery(HPreparedStatement statement) throws SQLException;
+    HResultSet executeQuery(HPreparedStatement statement) throws SQLException;
 
     boolean execute(HPreparedStatement statement) throws SQLException;
 }

src/main/java/com/alibaba/druid/hbase/exec/ExecutePlanAdapter.java

@@ -3,12 +3,12 @@ package com.alibaba.druid.hbase.exec;
 import java.sql.SQLException;
 
 import com.alibaba.druid.hbase.HPreparedStatement;
-import com.alibaba.druid.hbase.HBaseResultSet;
+import com.alibaba.druid.hbase.HResultSet;
 
 public class ExecutePlanAdapter implements ExecutePlan {
 
     @Override
-    public HBaseResultSet executeQuery(HPreparedStatement statement) throws SQLException {
+    public HResultSet executeQuery(HPreparedStatement statement) throws SQLException {
         throw new UnsupportedOperationException();
     }
 

src/main/java/com/alibaba/druid/hbase/exec/ShowTablesPlan.java

@@ -0,0 +1,103 @@
+package com.alibaba.druid.hbase.exec;
+
+import java.sql.SQLException;
+import java.sql.Statement;
+
+import org.apache.hadoop.hbase.HColumnDescriptor;
+import org.apache.hadoop.hbase.HTableDescriptor;
+import org.apache.hadoop.hbase.client.HBaseAdmin;
+
+import com.alibaba.druid.common.jdbc.ResultSetBase;
+import com.alibaba.druid.hbase.HPreparedStatement;
+import com.alibaba.druid.hbase.HResultSet;
+
+public class ShowTablesPlan implements ExecutePlan {
+
+    @Override
+    public HResultSet executeQuery(HPreparedStatement statement) throws SQLException {
+        try {
+            HBaseAdmin admin = statement.getConnection().getEngine().getHBaseAdmin();
+
+            HTableDescriptor[] tables = admin.listTables();
+
+            return new ShowTableResultSet(statement, tables);
+        } catch (SQLException e) {
+            throw e;
+        } catch (Exception e) {
+            throw new SQLException("executeQuery error", e);
+        }
+    }
+
+    @Override
+    public boolean execute(HPreparedStatement statement) throws SQLException {
+        HResultSet resultSet = executeQuery(statement);
+        statement.setResultSet(resultSet);
+        return true;
+    }
+
+    public static class ShowTableResultSet extends ResultSetBase implements HResultSet {
+
+        private final HTableDescriptor[] tables;
+        private int                      rowIndex = -1;
+
+        public ShowTableResultSet(Statement statement, HTableDescriptor[] tables){
+            super(statement);
+            this.tables = tables;
+        }
+
+        @Override
+        public synchronized boolean next() throws SQLException {
+            if (closed) {
+                throw new SQLException();
+            }
+
+            if (rowIndex < tables.length - 1) {
+                rowIndex++;
+                return true;
+            }
+            return false;
+        }
+
+        @Override
+        public synchronized boolean previous() throws SQLException {
+            if (closed) {
+                throw new SQLException();
+            }
+
+            if (rowIndex > 0) {
+                rowIndex--;
+                return true;
+            }
+            return false;
+        }
+
+        public Object getObject(String columnName) {
+            HTableDescriptor table = tables[rowIndex];
+            
+            if ("name".equals(columnName)) {
+                return table.getNameAsString();
+            }
+            
+            if ("owner".equals(columnName)) {
+                return table.getOwnerString();
+            }
+
+            if ("familys".equals(columnName)) {
+                StringBuffer buf = new StringBuffer();
+                for (HColumnDescriptor column : table.getFamilies()) {
+                    if (buf.length() != 0) {
+                        buf.append(',');
+                    }
+                    buf.append(column.getNameAsString());
+                }
+                return buf.toString();
+            }
+            
+            return null;
+        }
+
+        @Override
+        public void updateObject(int columnIndex, Object x) throws SQLException {
+        }
+    }
+}

src/main/java/com/alibaba/druid/mock/MockResultSet.java

@@ -29,10 +29,9 @@ public class MockResultSet extends ResultSetBase implements ResultSet {
     private int                   rowIndex = -1;
     private List<Object[]>        rows     = new ArrayList<Object[]>();
 
-    private MockResultSetMetaData metaData = new MockResultSetMetaData();
-
     public MockResultSet(Statement statement){
         super(statement);
+        super.metaData = new MockResultSetMetaData();
     }
 
     public List<Object[]> getRows() {
@@ -59,11 +58,11 @@ public class MockResultSet extends ResultSetBase implements ResultSet {
             throw new SQLException("resultSet closed");
         }
 
-        return metaData;
+        return (MockResultSetMetaData) metaData;
     }
 
     public MockResultSetMetaData getMockMetaData() throws SQLException {
-        return metaData;
+        return (MockResultSetMetaData) metaData;
     }
 
     public Object getObjectInternal(int columnIndex) {