| /* |
| * 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 |