Source Code Cross Referenced for JRQueryExecuterFactory.java in  » Report » jasperreports-2.0.1 » net » sf » jasperreports » engine » query » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Report » jasperreports 2.0.1 » net.sf.jasperreports.engine.query 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


01:        /*
02:         * ============================================================================
03:         * GNU Lesser General Public License
04:         * ============================================================================
05:         *
06:         * JasperReports - Free Java report-generating library.
07:         * Copyright (C) 2001-2006 JasperSoft Corporation http://www.jaspersoft.com
08:         * 
09:         * This library is free software; you can redistribute it and/or
10:         * modify it under the terms of the GNU Lesser General Public
11:         * License as published by the Free Software Foundation; either
12:         * version 2.1 of the License, or (at your option) any later version.
13:         * 
14:         * This library is distributed in the hope that it will be useful,
15:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
16:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17:         * Lesser General Public License for more details.
18:         * 
19:         * You should have received a copy of the GNU Lesser General Public
20:         * License along with this library; if not, write to the Free Software
21:         * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA.
22:         * 
23:         * JasperSoft Corporation
24:         * 303 Second Street, Suite 450 North
25:         * San Francisco, CA 94107
26:         * http://www.jaspersoft.com
27:         */
28:        package net.sf.jasperreports.engine.query;
29:
30:        import java.util.Map;
31:
32:        import net.sf.jasperreports.engine.JRDataset;
33:        import net.sf.jasperreports.engine.JRException;
34:        import net.sf.jasperreports.engine.JRValueParameter;
35:        import net.sf.jasperreports.engine.util.JRProperties;
36:
37:        /**
38:         * Factory classes used to create query executers.
39:         * <p/>
40:         * For each query language, a query executer factory must be created and registered as a JR property.
41:         * <p/>
42:         * Query executer factory instances must be thread-safe as they are cached and used as singletons.
43:         * 
44:         * @author Lucian Chirita (lucianc@users.sourceforge.net)
45:         * @version $Id: JRQueryExecuterFactory.java 1828 2007-08-24 13:58:43Z teodord $
46:         * @see net.sf.jasperreports.engine.query.JRQueryExecuter
47:         */
48:        public interface JRQueryExecuterFactory {
49:
50:            /**
51:             * Prefix for query executer factory properties.
52:             * <p/>
53:             * To obtain query executer factories, a property having the query language appended to this prefix is used 
54:             * to get the query executer factory name.
55:             */
56:            public static final String QUERY_EXECUTER_FACTORY_PREFIX = JRProperties.PROPERTY_PREFIX
57:                    + "query.executer.factory.";
58:
59:            /**
60:             * Returns the built-in parameters associated with this query type.
61:             * <p/>
62:             * These parameters will be created as system-defined parameters for each 
63:             * report/dataset having a query of this type.
64:             * <p/>
65:             * The returned array should contain consecutive pairs of parameter names and parameter classes
66:             * (e.g. <code>{"Param1", String.class, "Param2", "List.class"}</code>).
67:             * 
68:             * @return array of built-in parameter names and types associated with this query type
69:             */
70:            public Object[] getBuiltinParameters();
71:
72:            /**
73:             * Creates a query executer.
74:             * <p/>
75:             * This method is called at fill time for reports/datasets having a query supported by
76:             * this factory.
77:             * 
78:             * @param dataset the dataset containing the query, fields, etc
79:             * @param parameters map of value parameters (instances of {@link JRValueParameter JRValueParameter})
80:             * 	indexed by name
81:             * 
82:             * @return a query executer
83:             * @throws JRException
84:             */
85:            public JRQueryExecuter createQueryExecuter(JRDataset dataset,
86:                    Map parameters) throws JRException;
87:
88:            /**
89:             * Decides whether the query executers created by this factory support a query parameter type.
90:             * <p/>
91:             * This check is performed for all $P{..} parameters in the query.
92:             * 
93:             * @param className the value class name of the parameter
94:             * @return whether the parameter value type is supported
95:             */
96:            public boolean supportsQueryParameterType(String className);
97:
98:        }
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