Source Code Cross Referenced for JDBCMappingMetaData.java in  » EJB-Server-JBoss-4.2.1 » server » org » jboss » ejb » plugins » cmp » jdbc » metadata » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » EJB Server JBoss 4.2.1 » server » org.jboss.ejb.plugins.cmp.jdbc.metadata 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * JBoss, Home of Professional Open Source.
003:         * Copyright 2006, Red Hat Middleware LLC, and individual contributors
004:         * as indicated by the @author tags. See the copyright.txt file in the
005:         * distribution for a full listing of individual contributors.
006:         *
007:         * This is free software; you can redistribute it and/or modify it
008:         * under the terms of the GNU Lesser General Public License as
009:         * published by the Free Software Foundation; either version 2.1 of
010:         * the License, or (at your option) any later version.
011:         *
012:         * This software is distributed in the hope that it will be useful,
013:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
014:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
015:         * Lesser General Public License for more details.
016:         *
017:         * You should have received a copy of the GNU Lesser General Public
018:         * License along with this software; if not, write to the Free
019:         * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
020:         * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
021:         */
022:        package org.jboss.ejb.plugins.cmp.jdbc.metadata;
023:
024:        import java.sql.Types;
025:
026:        import org.jboss.deployment.DeploymentException;
027:        import org.jboss.logging.Logger;
028:
029:        import org.jboss.metadata.MetaData;
030:        import org.w3c.dom.Element;
031:
032:        /**
033:         * Imutable class which holds a mapping between a Java Class and a JDBC type
034:         * and a SQL type.
035:         *
036:         * @author <a href="mailto:dain@daingroup.com">Dain Sundstrom</a>
037:         * @author <a href="sebastien.alborini@m4x.org">Sebastien Alborini</a>
038:         * @version $Revision: 57209 $
039:         */
040:        public final class JDBCMappingMetaData {
041:            private static Logger log = Logger
042:                    .getLogger(JDBCMappingMetaData.class.getName());
043:
044:            /**
045:             * Gets the JDBC type constant int for the name. The mapping from name to jdbc
046:             * type is contained in java.sql.Types.
047:             *
048:             * @param name the name for the jdbc type
049:             * @return the int type constant from java.sql.Types
050:             * @see java.sql.Types
051:             */
052:            public static int getJdbcTypeFromName(String name)
053:                    throws DeploymentException {
054:                if (name == null) {
055:                    throw new DeploymentException("jdbc-type cannot be null");
056:                }
057:
058:                try {
059:                    Integer constant = (Integer) Types.class.getField(name)
060:                            .get(null);
061:                    return constant.intValue();
062:
063:                } catch (Exception e) {
064:                    log.warn("Unrecognized jdbc-type: " + name
065:                            + ", using Types.OTHER", e);
066:                    return Types.OTHER;
067:                }
068:            }
069:
070:            /** fully qualified Java type name */
071:            private final String javaType;
072:            /** JDBC type according to java.sql.Types */
073:            private final int jdbcType;
074:            /** SQL type */
075:            private final String sqlType;
076:            /** parameter setter */
077:            private final String paramSetter;
078:            /** result set reader */
079:            private final String resultReader;
080:
081:            /**
082:             * Constructs a mapping with the data contained in the mapping xml element
083:             * from a jbosscmp-jdbc xml file.
084:             *
085:             * @param element the xml Element which contains the metadata about
086:             *      this mapping
087:             * @throws DeploymentException if the xml element is not semantically correct
088:             */
089:            public JDBCMappingMetaData(Element element)
090:                    throws DeploymentException {
091:                javaType = MetaData.getUniqueChildContent(element, "java-type");
092:                jdbcType = getJdbcTypeFromName(MetaData.getUniqueChildContent(
093:                        element, "jdbc-type"));
094:                sqlType = MetaData.getUniqueChildContent(element, "sql-type");
095:                paramSetter = MetaData.getOptionalChildContent(element,
096:                        "param-setter");
097:                resultReader = MetaData.getOptionalChildContent(element,
098:                        "result-reader");
099:            }
100:
101:            /**
102:             * Gets the java type of this mapping. The java type is used to differentiate
103:             * this mapping from other mappings.
104:             *
105:             * @return the java type of this mapping
106:             */
107:            public String getJavaType() {
108:                return javaType;
109:            }
110:
111:            /**
112:             * Gets the jdbc type of this mapping. The jdbc type is used to retrieve data
113:             * from a result set and to set parameters in a prepared statement.
114:             *
115:             * @return the jdbc type of this mapping
116:             */
117:            public int getJdbcType() {
118:                return jdbcType;
119:            }
120:
121:            /**
122:             * Gets the sql type of this mapping. The sql type is the sql column data
123:             * type, and is used in CREATE TABLE statements.
124:             *
125:             * @return the sql type String of this mapping
126:             */
127:            public String getSqlType() {
128:                return sqlType;
129:            }
130:
131:            public String getParamSetter() {
132:                return paramSetter;
133:            }
134:
135:            public String getResultReader() {
136:                return resultReader;
137:            }
138:        }
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