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30 day Evaluation Version distributed via the Maven Jar Repository. Clover is not free. You have 30 days to evaluate it. Please visit http://www.thecortex.net/clover to obtain a licensed version of Clover | |||||||||||||||||||
Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
SimpleTemplateEngine.java | 0% | 0% | 0% | 0% |
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/*
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* $Id: SimpleTemplateEngine.java,v 1.12 2004/05/12 20:29:04 spullara Exp $version Mar 8, 2004 2:11:00 AM $user Exp $
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*
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* Copyright 2003 (C) Sam Pullara. All Rights Reserved.
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*
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* Redistribution and use of this software and associated documentation
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* ("Software"), with or without modification, are permitted provided that the
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* following conditions are met: 1. Redistributions of source code must retain
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* copyright statements and notices. Redistributions must also contain a copy
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* of this document. 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the distribution. 3.
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* The name "groovy" must not be used to endorse or promote products derived
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* from this Software without prior written permission of The Codehaus. For
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* written permission, please contact info@codehaus.org. 4. Products derived
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* from this Software may not be called "groovy" nor may "groovy" appear in
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* their names without prior written permission of The Codehaus. "groovy" is a
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* registered trademark of The Codehaus. 5. Due credit should be given to The
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* Codehaus - http://groovy.codehaus.org/
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*
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* THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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*/
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package groovy.text;
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import groovy.lang.Binding;
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import groovy.lang.GroovyShell;
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import groovy.lang.Script;
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import groovy.lang.Writable;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.io.Reader;
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import java.io.StringWriter;
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import java.io.Writer;
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import java.util.Map;
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import org.codehaus.groovy.control.CompilationFailedException;
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import org.codehaus.groovy.runtime.InvokerHelper;
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/**
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* This simple template engine uses JSP <% %> script and <%= %> expression syntax. It also lets you use normal groovy expressions in
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* the template text much like the new JSP EL functionality. The variable 'out' is bound to the writer that the template is being written to.
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*
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* @author sam
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*/
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public class SimpleTemplateEngine extends TemplateEngine { |
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/* (non-Javadoc)
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* @see groovy.util.TemplateEngine#createTemplate(java.io.Reader)
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*/
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public Template createTemplate(Reader reader) throws CompilationFailedException, ClassNotFoundException, IOException { |
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SimpleTemplate template = new SimpleTemplate();
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GroovyShell shell = new GroovyShell();
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String script = template.parse(reader); |
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template.script = shell.parse(script); |
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return template;
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} |
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private static class SimpleTemplate implements Template { |
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private Script script;
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public Writable make() {
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return make(null); |
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} |
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public Writable make(final Map map) {
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return new Writable() { |
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/**
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* Write the template document with the set binding applied to the writer.
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*
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* @see groovy.lang.Writable#writeTo(java.io.Writer)
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*/
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public Writer writeTo(Writer writer) throws IOException { |
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Binding binding; |
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if (map == null) binding = new Binding(); else binding = new Binding(map); |
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Script scriptObject = InvokerHelper.createScript(script.getClass(), binding); |
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PrintWriter pw = new PrintWriter(writer);
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scriptObject.setProperty("out", pw);
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scriptObject.run(); |
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pw.flush(); |
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return writer;
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} |
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/**
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* Convert the template and binding into a result String.
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*
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* @see java.lang.Object#toString()
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*/
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public String toString() {
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try {
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StringWriter sw = new StringWriter();
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writeTo(sw); |
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return sw.toString();
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} catch (Exception e) {
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return e.toString();
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} |
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} |
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}; |
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} |
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/**
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* Parse the text document looking for <% or <%= and then call out to the appropriate handler, otherwise copy the text directly
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* into the script while escaping quotes.
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*
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* @param reader
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* @return
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* @throws IOException
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*/
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private String parse(Reader reader) throws IOException { |
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if (!reader.markSupported()) {
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reader = new BufferedReader(reader);
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} |
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StringWriter sw = new StringWriter();
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startScript(sw); |
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boolean start = false; |
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int c;
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while((c = reader.read()) != -1) {
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if (c == '<') {
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c = reader.read(); |
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if (c != '%') {
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sw.write('<'); |
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} else {
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reader.mark(1); |
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c = reader.read(); |
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if (c == '=') {
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groovyExpression(reader, sw); |
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} else {
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reader.reset(); |
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groovySection(reader, sw); |
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} |
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continue;
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} |
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} |
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if (c == '\"') {
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sw.write('\\'); |
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} |
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sw.write(c); |
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} |
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endScript(sw); |
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String result = sw.toString(); |
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//System.out.println( "source text:\n" + result );
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return result;
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} |
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private void startScript(StringWriter sw) { |
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sw.write("/* Generated by SimpleTemplateEngine */ ");
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sw.write("out.print(\"");
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} |
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private void endScript(StringWriter sw) { |
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sw.write("\");\n");
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} |
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/**
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* Closes the currently open write and writes out the following text as a GString expression until it reaches an end %>.
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*
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* @param reader
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* @param sw
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* @throws IOException
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*/
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private void groovyExpression(Reader reader, StringWriter sw) throws IOException { |
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sw.write("\");out.print(\"${");
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int c;
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while((c = reader.read()) != -1) {
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if (c == '%') {
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c = reader.read(); |
181 | 0 |
if (c != '>') {
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sw.write('%'); |
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} else {
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break;
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} |
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} |
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sw.write(c); |
188 |
} |
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sw.write("}\");out.print(\"");
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} |
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/**
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* Closes the currently open write and writes the following text as normal Groovy script code until it reaches an end %>.
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*
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* @param reader
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* @param sw
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* @throws IOException
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*/
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private void groovySection(Reader reader, StringWriter sw) throws IOException { |
200 | 0 |
sw.write("\");");
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int c;
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while((c = reader.read()) != -1) {
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if (c == '%') {
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c = reader.read(); |
205 | 0 |
if (c != '>') {
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sw.write('%'); |
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} else {
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break;
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} |
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} |
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sw.write(c); |
212 |
} |
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sw.write(";out.print(\"");
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} |
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} |
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} |
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