Source Code Cross Referenced for JRGroovyCompiler.java in  » Report » jasperreports-2.0.1 » net » sf » jasperreports » compilers » 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.compilers 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * ============================================================================
003:         * GNU Lesser General Public License
004:         * ============================================================================
005:         *
006:         * JasperReports - Free Java report-generating library.
007:         * Copyright (C) 2001-2006 JasperSoft Corporation http://www.jaspersoft.com
008:         * 
009:         * This library is free software; you can redistribute it and/or
010:         * modify it under the terms of the GNU Lesser General Public
011:         * License as published by the Free Software Foundation; either
012:         * version 2.1 of the License, or (at your option) any later version.
013:         * 
014:         * This library is distributed in the hope that it will be useful,
015:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
016:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
017:         * Lesser General Public License for more details.
018:         * 
019:         * You should have received a copy of the GNU Lesser General Public
020:         * License along with this library; if not, write to the Free Software
021:         * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA.
022:         * 
023:         * JasperSoft Corporation
024:         * 303 Second Street, Suite 450 North
025:         * San Francisco, CA 94107
026:         * http://www.jaspersoft.com
027:         */
028:
029:        /*
030:         * Contributors:
031:         * Peter Severin - peter_p_s@users.sourceforge.net 
032:         */
033:        package net.sf.jasperreports.compilers;
034:
035:        import groovyjarjarasm.asm.ClassVisitor;
036:        import groovyjarjarasm.asm.ClassWriter;
037:
038:        import java.io.ByteArrayInputStream;
039:        import java.io.File;
040:        import java.io.Serializable;
041:        import java.util.HashMap;
042:        import java.util.Map;
043:
044:        import net.sf.jasperreports.engine.JRException;
045:        import net.sf.jasperreports.engine.JRReport;
046:        import net.sf.jasperreports.engine.design.JRAbstractJavaCompiler;
047:        import net.sf.jasperreports.engine.design.JRCompilationSourceCode;
048:        import net.sf.jasperreports.engine.design.JRCompilationUnit;
049:        import net.sf.jasperreports.engine.design.JRDefaultCompilationSourceCode;
050:        import net.sf.jasperreports.engine.design.JRSourceCompileTask;
051:
052:        import org.codehaus.groovy.ast.ClassNode;
053:        import org.codehaus.groovy.control.CompilationFailedException;
054:        import org.codehaus.groovy.control.CompilationUnit;
055:        import org.codehaus.groovy.control.CompilerConfiguration;
056:        import org.codehaus.groovy.control.Phases;
057:
058:        /**
059:         * Calculator compiler that uses groovy to compile expressions.
060:         * 
061:         * @author Teodor Danciu (teodord@users.sourceforge.net), Peter Severin (peter_p_s@users.sourceforge.net)
062:         * @version $Id: JRGroovyCompiler.java 1828 2007-08-24 13:58:43Z teodord $
063:         */
064:        public class JRGroovyCompiler extends JRAbstractJavaCompiler {
065:
066:            public JRGroovyCompiler() {
067:                super (false);
068:            }
069:
070:            protected String compileUnits(JRCompilationUnit[] units,
071:                    String classpath, File tempDirFile) throws JRException {
072:                CompilerConfiguration config = new CompilerConfiguration();
073:                config.setUseNewGroovy(true);
074:                //config.setClasspath(classpath);
075:                CompilationUnit unit = new CompilationUnit(config);
076:
077:                for (int i = 0; i < units.length; i++) {
078:                    unit.addSource("calculator_" + units[i].getName(),
079:                            new ByteArrayInputStream(units[i].getSourceCode()
080:                                    .getBytes()));
081:                }
082:
083:                ClassCollector collector = new ClassCollector();
084:                unit.setClassgenCallback(collector);
085:                try {
086:                    unit.compile(Phases.CLASS_GENERATION);
087:                } catch (CompilationFailedException e) {
088:                    throw new JRException(
089:                            "Errors were encountered when compiling report expressions class file:\n"
090:                                    + e.toString());
091:                }
092:
093:                if (collector.classes.size() < units.length) {
094:                    throw new JRException(
095:                            "Too few groovy class were generated.");
096:                } else if (collector.classCount > units.length) {
097:                    throw new JRException(
098:                            "Too many groovy classes were generated.\n"
099:                                    + "Please make sure that you don't use Groovy features such as closures that are not supported by this report compiler.\n");
100:                }
101:
102:                for (int i = 0; i < units.length; i++) {
103:                    units[i].setCompileData((Serializable) collector.classes
104:                            .get(units[i].getName()));
105:                }
106:
107:                return null;
108:            }
109:
110:            /**
111:             *
112:             */
113:            private static class ClassCollector extends
114:                    CompilationUnit.ClassgenCallback {
115:                public Map classes = new HashMap();
116:                public int classCount;
117:
118:                /**
119:                 * @see org.codehaus.groovy.control.CompilationUnit.ClassgenCallback#call(
120:                 *      groovyjarjarasm.asm.ClassVisitor, 
121:                 *      org.codehaus.groovy.ast.ClassNode)
122:                 */
123:                public void call(ClassVisitor writer, ClassNode node)
124:                        throws CompilationFailedException {
125:                    classCount++;
126:                    String name = node.getName();
127:                    if (!classes.containsKey(name)) {
128:                        byte[] bytes = ((ClassWriter) writer).toByteArray();
129:                        classes.put(name, bytes);
130:                    }
131:                }
132:            }
133:
134:            protected void checkLanguage(String language) throws JRException {
135:                if (!JRReport.LANGUAGE_GROOVY.equals(language)
136:                        && !JRReport.LANGUAGE_JAVA.equals(language)) {
137:                    throw new JRException("Language \"" + language
138:                            + "\" not supported by this report compiler.\n"
139:                            + "Expecting \"groovy\" or \"java\" instead.");
140:                }
141:            }
142:
143:            protected JRCompilationSourceCode generateSourceCode(
144:                    JRSourceCompileTask sourceTask) throws JRException {
145:                return new JRDefaultCompilationSourceCode(JRGroovyGenerator
146:                        .generateClass(sourceTask), null);
147:            }
148:
149:            protected String getSourceFileName(String unitName) {
150:                return unitName + ".groovy";
151:            }
152:
153:        }
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