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Groovy example source code file (TemplateEngine.java)

This example Groovy source code file (TemplateEngine.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Groovy tags/keywords

classnotfoundexception, classnotfoundexception, compilationfailedexception, compilationfailedexception, filereader, io, ioexception, ioexception, net, network, reader, stringreader, template, template, templateengine

The Groovy TemplateEngine.java source code

/*
 * Copyright 2003-2007 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package groovy.text;

import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.Reader;
import java.io.StringReader;
import java.net.URL;

import org.codehaus.groovy.control.CompilationFailedException;
import org.codehaus.groovy.runtime.DefaultGroovyMethodsSupport;

/**
 * Represents an API to any template engine which is basically a factory of Template instances from a given text input.
 * 
 * @author sam
 */
public abstract class TemplateEngine {
    public abstract Template createTemplate(Reader reader) throws CompilationFailedException, ClassNotFoundException, IOException;
    
    public Template createTemplate(String templateText) throws CompilationFailedException, ClassNotFoundException, IOException {
        return createTemplate(new StringReader(templateText));
    }
    
    public Template createTemplate(File file) throws CompilationFailedException, ClassNotFoundException, IOException {
        Reader reader = new FileReader(file);
        try {
            return createTemplate(reader);
        } finally {
            DefaultGroovyMethodsSupport.closeWithWarning(reader);
        }
    }

    public Template createTemplate(URL url) throws CompilationFailedException, ClassNotFoundException, IOException {
        Reader reader = new InputStreamReader(url.openStream());
        try {
            return createTemplate(reader);
        } finally {
            DefaultGroovyMethodsSupport.closeWithWarning(reader);
        }
    }
}

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