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.noop;
  
  import java.sql.Array;
  import java.sql.Blob;
  import java.sql.CallableStatement;
  import java.sql.Clob;
  import java.sql.Connection;
  import java.sql.DatabaseMetaData;
  import java.sql.NClob;
  import java.sql.PreparedStatement;
  import java.sql.SQLClientInfoException;
  import java.sql.SQLException;
  import java.sql.SQLWarning;
  import java.sql.SQLXML;
  import java.sql.Savepoint;
  import java.sql.Statement;
  import java.sql.Struct;
  import java.util.Collections;
  import java.util.Map;
  import java.util.Properties;
  import java.util.concurrent.Executor;
  
  /**
   * A {@link Connection} implementation which does nothing.
   */
  public class AvaticaNoopConnection implements Connection {
  
    private static final AvaticaNoopConnection INSTANCE = new AvaticaNoopConnection();
  
    public static AvaticaNoopConnection getInstance() {
      return INSTANCE;
    }
  
    private AvaticaNoopConnection() {}
  
    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 Statement createStatement() throws SQLException {
      return AvaticaNoopStatement.getInstance();
    }
  
    @Override public PreparedStatement prepareStatement(String sql) throws SQLException {
      return AvaticaNoopPreparedStatement.getInstance();
    }
  
    @Override public CallableStatement prepareCall(String sql) throws SQLException {
      throw unsupported();
    }
  
    @Override public String nativeSQL(String sql) throws SQLException {
      throw unsupported();
    }
  
    @Override public void setAutoCommit(boolean autoCommit) throws SQLException {}
  
    @Override public boolean getAutoCommit() throws SQLException {
      return false;
    }
  
    @Override public void commit() throws SQLException {}
  
    @Override public void rollback() throws SQLException {}
  
    @Override public void close() throws SQLException {}
  
    @Override public boolean isClosed() throws SQLException {
      return true;
    }
  
    @Override public DatabaseMetaData getMetaData() throws SQLException {
      return AvaticaNoopDatabaseMetaData.getInstance();
    }
  
    @Override public void setReadOnly(boolean readOnly) throws SQLException {}
  
    @Override public boolean isReadOnly() throws SQLException {
      return false;
    }
  
    @Override public void setCatalog(String catalog) throws SQLException {}
  
    @Override public String getCatalog() throws SQLException {
      return null;
    }
  
    @Override public void setTransactionIsolation(int level) throws SQLException {}
  
    @Override public int getTransactionIsolation() throws SQLException {
      return 0;
    }
  
    @Override public SQLWarning getWarnings() throws SQLException {
      return null;
    }
  
    @Override public void clearWarnings() throws SQLException {}
  
    @Override public Statement createStatement(int resultSetType, int resultSetConcurrency)
        throws SQLException {
      return AvaticaNoopStatement.getInstance();
    }
  
    @Override public PreparedStatement prepareStatement(String sql, int resultSetType,
        int resultSetConcurrency) throws SQLException {
      return AvaticaNoopPreparedStatement.getInstance();
    }
  
    @Override public CallableStatement prepareCall(String sql, int resultSetType,
        int resultSetConcurrency) throws SQLException {
      throw unsupported();
    }
  
    @Override public Map<String, Class<?>> getTypeMap() throws SQLException {
      return Collections.emptyMap();
    }
  
    @Override public void setTypeMap(Map<String, Class<?>> map) throws SQLException {}
  
    @Override public void setHoldability(int holdability) throws SQLException {}
  
    @Override public int getHoldability() throws SQLException {
      throw unsupported();
    }
  
    @Override public Savepoint setSavepoint() throws SQLException {
      throw unsupported();
    }
  
    @Override public Savepoint setSavepoint(String name) throws SQLException {
      throw unsupported();
    }
  
    @Override public void rollback(Savepoint savepoint) throws SQLException {
      throw unsupported();
    }
  
    @Override public void releaseSavepoint(Savepoint savepoint) throws SQLException {
      throw unsupported();
    }
  
    @Override public Statement createStatement(int resultSetType, int resultSetConcurrency,
        int resultSetHoldability) throws SQLException {
      return AvaticaNoopStatement.getInstance();
    }
  
    @Override public PreparedStatement prepareStatement(String sql, int resultSetType,
        int resultSetConcurrency, int resultSetHoldability) throws SQLException {
      return AvaticaNoopPreparedStatement.getInstance();
    }
  
    @Override public CallableStatement prepareCall(String sql, int resultSetType,
        int resultSetConcurrency, int resultSetHoldability) throws SQLException {
      throw unsupported();
    }
  
    @Override public PreparedStatement prepareStatement(String sql, int autoGeneratedKeys)
        throws SQLException {
      return AvaticaNoopPreparedStatement.getInstance();
    }
  
    @Override public PreparedStatement prepareStatement(String sql, int[] columnIndexes)
        throws SQLException {
      return AvaticaNoopPreparedStatement.getInstance();
    }
  
    @Override public PreparedStatement prepareStatement(String sql, String[] columnNames)
        throws SQLException {
      return AvaticaNoopPreparedStatement.getInstance();
    }
  
    @Override public Clob createClob() throws SQLException {
      throw unsupported();
    }
  
    @Override public Blob createBlob() throws SQLException {
      throw unsupported();
    }
  
    @Override public NClob createNClob() throws SQLException {
      throw unsupported();
    }
  
    @Override public SQLXML createSQLXML() throws SQLException {
      throw unsupported();
    }
  
    @Override public boolean isValid(int timeout) throws SQLException {
      return true;
    }
  
    @Override public void setClientInfo(String name, String value) throws SQLClientInfoException {}
  
    @Override public void setClientInfo(Properties properties) throws SQLClientInfoException {}
  
    @Override public String getClientInfo(String name) throws SQLException {
      throw unsupported();
    }
  
    @Override public Properties getClientInfo() throws SQLException {
      throw unsupported();
    }
  
    @Override public Array createArrayOf(String typeName, Object[] elements) throws SQLException {
      throw unsupported();
    }
  
    @Override public Struct createStruct(String typeName, Object[] attributes) throws SQLException {
      throw unsupported();
    }
  
    @Override public void setSchema(String schema) throws SQLException {}
  
    @Override public String getSchema() throws SQLException {
      return null;
    }
  
    @Override public void abort(Executor executor) throws SQLException {
      throw unsupported();
    }
  
    @Override public void setNetworkTimeout(Executor executor, int milliseconds)
        throws SQLException {}
  
    @Override public int getNetworkTimeout() throws SQLException {
      throw unsupported();
    }
  
  }
  
  // End AvaticaNoopConnection.java
  