SmartProjector.java

biz/hammurapi/sql/SmartProjector.java

Violations

Inspector Message Severity Location
Java Inspector 048 Copyrights information should be present in each file. 1
Java Inspector 089 Undocumented method 2 47:9
Java Inspector 089 Undocumented constructor 2 104:9
Java Inspector 089 Undocumented constructor 2 115:5
Java Inspector 026 Avoid hardwired string literals. Allowed literals: [] 3 109:65
Java Inspector 026 Avoid hardwired string literals. Allowed literals: [] 3 111:65
Java Inspector 026 Avoid hardwired string literals. Allowed literals: [] 3 111:120
Java Inspector 026 Avoid hardwired string literals. Allowed literals: [] 3 122:65
Java Inspector 026 Avoid hardwired string literals. Allowed literals: [] 3 124:65
Java Inspector 026 Avoid hardwired string literals. Allowed literals: [] 3 124:120
Java Inspector 051 It is good practice to call in any case super() in a constructor. 3 104:9
Java Inspector 051 It is good practice to call in any case super() in a constructor. 3 115:5

Source code

1/*
2  * hgcommons 9
3 * Hammurapi Group Common Library
4 * Copyright (C) 2003  Hammurapi Group
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
19 *
20 * URL: http://www.hammurapi.biz/hammurapi-biz/ef/xmenu/hammurapi-group/products/products/hgcommons/index.html
21 * e-Mail: support@hammurapi.biz
22  */
23package biz.hammurapi.sql;
24
25import java.lang.reflect.Constructor;
26import java.lang.reflect.InvocationTargetException;
27import java.sql.ResultSet;
28import java.sql.SQLException;
29
30import biz.hammurapi.config.RuntimeConfigurationException;
31import biz.hammurapi.convert.ConverterClosure;
32import biz.hammurapi.convert.ConvertingService;
33
34
35/**
36 * Base class for SQLC generated projectors.
37 * @author Pavel Vlasov
38 *
39 * @version $Revision: 1.3 $
40 */
41public class SmartProjector implements Projector {
42    private ConverterClosure converter;
43	private Class targetClass;
44	private Class sourceClass;
45	private Constructor sourceClassConstructor;
46
47	public Object project(ResultSet rs) throws SQLException {
48		Object ret;
49		if (targetClass==null) {
50			ret = defaultProject(rs);
51		} else {
52			if (sourceClass.isAssignableFrom(targetClass)) {
53				ret=project(rs, targetClass);
54			} else {
55				ret=ConvertingService.convert(defaultProject(rs), targetClass);
56			}
57		}
58		
59		if (converter==null) {
60			return ret;
61		}
62		
63		return converter.convert(ret);
64    }
65
66    /**
67	 * @param rs
68	 * @param ret
69	 * @return
70	 * @throws SQLException
71	 */
72	private Object defaultProject(ResultSet rs) throws SQLException {
73		try {
74			if (!sourceClassConstructor.isAccessible()) {
75				sourceClassConstructor.setAccessible(true); // To use private nested classes.

76			}
77			return sourceClassConstructor.newInstance(new Object[] {rs});
78		} catch (Exception e) {
79			throw new SQLExceptionEx(e);
80		}
81	}
82
83	/**
84	 * @param rs
85	 * @return
86     * @throws SQLException
87	 * @throws InstantiationException
88	 * @throws IllegalAccessException
89	 * @throws InvocationTargetException
90	 * @throws NoSuchMethodException
91	 */
92	private Object project(ResultSet rs, Class clazz) throws SQLException {			
93		try {
94			Constructor constructor = clazz.getConstructor(new Class[] {ResultSet.class});
95			if (!constructor.isAccessible()) {
96				constructor.setAccessible(true); // To use private nested classes.

97			}
98			return constructor.newInstance(new Object[] {rs});
99		} catch (Exception e) {
100			throw new SQLExceptionEx(e);
101		}
102	}
103
104	public SmartProjector(Class sourceClass) {
105    	this.sourceClass=sourceClass;
106    	try {
107			this.sourceClassConstructor=sourceClass.getConstructor(new Class[] {ResultSet.class});
108		} catch (SecurityException e) {
109			throw new RuntimeConfigurationException("Caused by: "+e, e);
110		} catch (NoSuchMethodException e) {
111			throw new RuntimeConfigurationException("Constructor from ResultSet not found in "+sourceClass+": "+e, e);
112		}
113    }
114    
115    public SmartProjector(Class sourceClass, Class targetClass, ConverterClosure converter) {
116    	this.converter=converter;
117    	this.targetClass=targetClass;
118    	this.sourceClass=sourceClass;
119    	try {
120			this.sourceClassConstructor=sourceClass.getConstructor(new Class[] {ResultSet.class});
121		} catch (SecurityException e) {
122			throw new RuntimeConfigurationException("Caused by: "+e, e);
123		} catch (NoSuchMethodException e) {
124			throw new RuntimeConfigurationException("Constructor from ResultSet not found in "+sourceClass+": "+e, e);
125		}
126    }	    
127}
128