/*
 * 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.noop;

import java.sql.ResultSetMetaData;
import java.sql.SQLException;

/**
 * A {@link ResultSetMetaData} implementation which does nothing.
 */
public class AvaticaNoopResultSetMetaData implements ResultSetMetaData {

  private static final AvaticaNoopResultSetMetaData INSTANCE = new AvaticaNoopResultSetMetaData();

  public static AvaticaNoopResultSetMetaData getInstance() {
    return INSTANCE;
  }

  private AvaticaNoopResultSetMetaData() {}

  private UnsupportedOperationException unsupported() {
    return new UnsupportedOperationException("Unsupported");
  }

  @Override public <T> T unwrap(Class<T> iface) throws SQLException {
    throw unsupported();
  }

  @Override public boolean isWrapperFor(Class<?> iface) throws SQLException {
    throw unsupported();
  }

  @Override public int getColumnCount() throws SQLException {
    return 0;
  }

  @Override public boolean isAutoIncrement(int column) throws SQLException {
    return false;
  }

  @Override public boolean isCaseSensitive(int column) throws SQLException {
    return false;
  }

  @Override public boolean isSearchable(int column) throws SQLException {
    return false;
  }

  @Override public boolean isCurrency(int column) throws SQLException {
    return false;
  }

  @Override public int isNullable(int column) throws SQLException {
    return 0;
  }

  @Override public boolean isSigned(int column) throws SQLException {
    return false;
  }

  @Override public int getColumnDisplaySize(int column) throws SQLException {
    return 0;
  }

  @Override public String getColumnLabel(int column) throws SQLException {
    return "";
  }

  @Override public String getColumnName(int column) throws SQLException {
    throw unsupported();
  }

  @Override public String getSchemaName(int column) throws SQLException {
    throw unsupported();
  }

  @Override public int getPrecision(int column) throws SQLException {
    return 0;
  }

  @Override public int getScale(int column) throws SQLException {
    return 0;
  }

  @Override public String getTableName(int column) throws SQLException {
    throw unsupported();
  }

  @Override public String getCatalogName(int column) throws SQLException {
    throw unsupported();
  }

  @Override public int getColumnType(int column) throws SQLException {
    return 0;
  }

  @Override public String getColumnTypeName(int column) throws SQLException {
    throw unsupported();
  }

  @Override public boolean isReadOnly(int column) throws SQLException {
    return false;
  }

  @Override public boolean isWritable(int column) throws SQLException {
    return false;
  }

  @Override public boolean isDefinitelyWritable(int column) throws SQLException {
    return false;
  }

  @Override public String getColumnClassName(int column) throws SQLException {
    throw unsupported();
  }

}

// End AvaticaNoopResultSetMetaData.java