content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to you 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.apache.calcite.avatica;
  
  import java.sql.ResultSetMetaData;
  import java.sql.SQLException;
  
  /**
   * Implementation of {@link ResultSetMetaData}
   * for the Avatica framework.
   */
  public class AvaticaResultSetMetaData implements ResultSetMetaData {
    final AvaticaStatement statement;
    final Object query; // reserved for future use
    final Meta.Signature signature;
  
    public AvaticaResultSetMetaData(
        AvaticaStatement statement,
        Object query,
        Meta.Signature signature) {
      this.statement = statement;
      this.query = query;
      this.signature = signature;
    }
  
    private ColumnMetaData getColumnMetaData(int column) {
      return signature.columns.get(column - 1);
    }
  
    // implement ResultSetMetaData
  
    public int getColumnCount() throws SQLException {
      return signature.columns.size();
    }
  
    public boolean isAutoIncrement(int column) throws SQLException {
      return getColumnMetaData(column).autoIncrement;
    }
  
    public boolean isCaseSensitive(int column) throws SQLException {
      return getColumnMetaData(column).caseSensitive;
    }
  
    public boolean isSearchable(int column) throws SQLException {
      return getColumnMetaData(column).searchable;
    }
  
    public boolean isCurrency(int column) throws SQLException {
      return getColumnMetaData(column).currency;
    }
  
    public int isNullable(int column) throws SQLException {
      return getColumnMetaData(column).nullable;
    }
  
    public boolean isSigned(int column) throws SQLException {
      return getColumnMetaData(column).signed;
    }
  
    public int getColumnDisplaySize(int column) throws SQLException {
      return getColumnMetaData(column).displaySize;
    }
  
    public String getColumnLabel(int column) throws SQLException {
      return getColumnMetaData(column).label;
    }
  
    public String getColumnName(int column) throws SQLException {
      return getColumnMetaData(column).columnName;
    }
  
    public String getSchemaName(int column) throws SQLException {
      return getColumnMetaData(column).schemaName;
    }
  
    public int getPrecision(int column) throws SQLException {
      return getColumnMetaData(column).precision;
    }
  
    public int getScale(int column) throws SQLException {
      return getColumnMetaData(column).scale;
    }
  
    public String getTableName(int column) throws SQLException {
      return getColumnMetaData(column).tableName;
    }
  
    public String getCatalogName(int column) throws SQLException {
      return getColumnMetaData(column).catalogName;
    }
  
    public int getColumnType(int column) throws SQLException {
      return getColumnMetaData(column).type.id;
    }
  
    public String getColumnTypeName(int column) throws SQLException {
      return getColumnMetaData(column).type.name;
    }
  
    public boolean isReadOnly(int column) throws SQLException {
      return getColumnMetaData(column).readOnly;
    }
  
    public boolean isWritable(int column) throws SQLException {
      return getColumnMetaData(column).writable;
    }
  
    public boolean isDefinitelyWritable(int column) throws SQLException {
      return getColumnMetaData(column).definitelyWritable;
    }
  
    public String getColumnClassName(int column) throws SQLException {
      return getColumnMetaData(column).columnClassName;
    }
  
    // implement Wrapper
  
    public <T> T unwrap(Class<T> iface) throws SQLException {
      if (iface.isInstance(this)) {
        return iface.cast(this);
      }
      throw statement.connection.HELPER.createException(
          "does not implement '" + iface + "'");
    }
  
    public boolean isWrapperFor(Class<?> iface) throws SQLException {
      return iface.isInstance(this);
    }
  }
  
  // End AvaticaResultSetMetaData.java
  