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Groovy example source code file (InterfaceTest.groovy)

This example Groovy source code file (InterfaceTest.groovy) 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

compilerconfiguration, compilerconfiguration, exception, file, file, filesystemcompiler, filesystemcompiler, gclass, gclass, ginterface, groovytestcase, interfacetest, jclass

The Groovy InterfaceTest.groovy source code

/*
 * Copyright 2003-2010 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 org.codehaus.groovy.classgen

import org.codehaus.groovy.control.CompilerConfiguration
import org.codehaus.groovy.tools.FileSystemCompiler

class InterfaceTest extends GroovyTestCase {

    void testCompile() {
        try {
            Class.forName("java.lang.annotation.Annotation");
        }
        catch (Exception ex) {
            return
        }

        File dir = createTempDir("groovy-src-", "-src")
        assertNotNull dir

        def fileList = [
                "GClass.groovy": """
         package test;

         class GClass {}
    """,

                "GInterface.groovy": """
         package test;

         interface GInterface {
            GClass [] get ();
         }
    """,

                "JClass.java": """
         package test;

         public class JClass implements GInterface {
            public GClass [] get () { return new GClass [0]; };
         }
    """,
        ].collect {
            name, text ->
            File file = new File(dir, name)
            file.write text
            file
        }

        CompilerConfiguration config = new CompilerConfiguration()
        config.targetDirectory = createTempDir("groovy-target-", "-target")
        config.jointCompilationOptions = [
                "stubDir": createTempDir("groovy-stub-", "-stub"),
//            "namedValues" : ["target","1.5","source","1.5"] as String[]
        ]
        config.classpath = "target/classes"
        FileSystemCompiler compiler = new FileSystemCompiler(config)
        compiler.compile(fileList.toArray(new File[fileList.size()]))
    }

    private filesToDelete = []

    void tearDown() {
        filesToDelete.each {file ->
            if (file instanceof File) {
                // remember: null instanceof anything is false
                FileSystemCompiler.deleteRecursive file
            }
        }
    }

    private File createTempDir(prefix, suffix) {
        File tempFile = File.createTempFile(prefix, suffix);
        tempFile.delete();
        tempFile.mkdirs();
        tempFile.deleteOnExit()
        filesToDelete.add(tempFile)
        return tempFile;
    }
}

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