| 1 | /* |
| 2 | |
| 3 | Derby - Class org.apache.derby.client.net.NetDatabaseMetaData |
| 4 | |
| 5 | Copyright (c) 2001, 2005 The Apache Software Foundation or its licensors, where applicable. |
| 6 | |
| 7 | Licensed under the Apache License, Version 2.0 (the "License"); |
| 8 | you may not use this file except in compliance with the License. |
| 9 | You may obtain a copy of the License at |
| 10 | |
| 11 | http://www.apache.org/licenses/LICENSE-2.0 |
| 12 | |
| 13 | Unless required by applicable law or agreed to in writing, software |
| 14 | distributed under the License is distributed on an "AS IS" BASIS, |
| 15 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 16 | See the License for the specific language governing permissions and |
| 17 | limitations under the License. |
| 18 | |
| 19 | */ |
| 20 | package org.apache.derby.client.net; |
| 21 | |
| 22 | import org.apache.derby.client.am.Configuration; |
| 23 | import org.apache.derby.client.am.ProductLevel; |
| 24 | import org.apache.derby.client.am.SqlException; |
| 25 | import org.apache.derby.shared.common.reference.JDBC30Translation; |
| 26 | |
| 27 | |
| 28 | public class NetDatabaseMetaData extends org.apache.derby.client.am.DatabaseMetaData { |
| 29 | |
| 30 | private final NetAgent netAgent_; |
| 31 | |
| 32 | /** True if the server supports QRYCLSIMP. */ |
| 33 | private boolean supportsQryclsimp_; |
| 34 | |
| 35 | public NetDatabaseMetaData(NetAgent netAgent, NetConnection netConnection) { |
| 36 | // Consider setting product level during parse |
| 37 | super(netAgent, netConnection, new ProductLevel(netConnection.productID_, |
| 38 | netConnection.targetSrvclsnm_, |
| 39 | netConnection.targetSrvrlslv_)); |
| 40 | // Set up cheat-links |
| 41 | netAgent_ = netAgent; |
| 42 | } |
| 43 | |
| 44 | //---------------------------call-down methods-------------------------------- |
| 45 | |
| 46 | public String getURL_() throws SqlException { |
| 47 | String urlProtocol; |
| 48 | |
| 49 | urlProtocol = Configuration.jdbcDerbyNETProtocol; |
| 50 | |
| 51 | return |
| 52 | urlProtocol + |
| 53 | connection_.serverNameIP_ + |
| 54 | ":" + |
| 55 | connection_.portNumber_ + |
| 56 | "/" + |
| 57 | connection_.databaseName_; |
| 58 | } |
| 59 | |
| 60 | //-----------------------------helper methods--------------------------------- |
| 61 | |
| 62 | // Set flags describing the level of support for this connection. |
| 63 | // Flags will be set based on manager level and/or specific product identifiers. |
| 64 | // Support for a specific server version can be set as follows. For example |
| 65 | // if (productLevel_.greaterThanOrEqualTo(11,1,0)) |
| 66 | // supportsTheBestThingEver = true |
| 67 | // |
| 68 | // WARNING WARNING WARNING !!!! |
| 69 | // |
| 70 | // If you define an instance variable of NetDatabaseMetaData that |
| 71 | // you want computeFeatureSet_() to compute, DO NOT assign an |
| 72 | // initial value to the variable in the |
| 73 | // declaration. NetDatabaseMetaData's constructor will invoke |
| 74 | // DatabaseMetaData's constructor, which then invokes |
| 75 | // computeFeatureSet_(). Initialization of instance variables in |
| 76 | // NetDatabaseMetaData will happen *after* the invocation of |
| 77 | // computeFeatureSet_() and will therefore overwrite the computed |
| 78 | // values. So, LEAVE INSTANCE VARIABLES UNINITIALIZED! |
| 79 | // |
| 80 | // END OF WARNING |
| 81 | protected void computeFeatureSet_() { |
| 82 | |
| 83 | // Support for QRYCLSIMP was added in 10.2.0 |
| 84 | if (productLevel_.greaterThanOrEqualTo(10, 2, 0)) { |
| 85 | supportsQryclsimp_ = true; |
| 86 | } else { |
| 87 | supportsQryclsimp_ = false; |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | /** |
| 92 | * Check whether the server has full support for the QRYCLSIMP |
| 93 | * parameter in OPNQRY. |
| 94 | * |
| 95 | * @return true if QRYCLSIMP is fully supported |
| 96 | */ |
| 97 | final boolean serverSupportsQryclsimp() { |
| 98 | return supportsQryclsimp_; |
| 99 | } |
| 100 | |
| 101 | } |