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BAEL-2899: adding some more case scenarios

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Gian Mario Contessa
2019-05-26 01:09:20 +01:00
parent 7c3082a093
commit 653717e25e
6 changed files with 228 additions and 30 deletions
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java-groovy-joint/src/main/java/com/baeldung/App.java
+63 -11
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@@ -1,12 +1,20 @@
package com.baeldung;
import groovy.lang.Binding;
import groovy.lang.GroovyClassLoader;
import groovy.lang.GroovyShell;
import groovy.lang.*;
import groovy.util.GroovyScriptEngine;
import groovy.util.ResourceException;
import groovy.util.ScriptException;
import org.codehaus.groovy.control.CompilerConfiguration;
import org.codehaus.groovy.jsr223.GroovyScriptEngineFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.script.Compilable;
import javax.script.ScriptEngine;
import java.io.File;
import java.io.IOException;
import java.net.URL;
/**
* Hello world!
*
@@ -15,40 +23,84 @@ public class App {
private final static Logger LOG = LoggerFactory.getLogger(App.class);
private final GroovyClassLoader loader;
private final GroovyShell shell;
private final GroovyScriptEngine engine;
private App() {
private App() throws IOException {
loader = new GroovyClassLoader(this.getClass().getClassLoader());
CompilerConfiguration config = new CompilerConfiguration();
config.setScriptBaseClass("com.baeldung.CalcScript");
shell = new GroovyShell(loader, new Binding(), config);
engine = new GroovyScriptEngine(new URL[] { new File("src/main/groovy/com/baeldung/").toURI().toURL() }, this.getClass().getClassLoader());
}
private void runScript(int x, int y) {
Object script = shell.parse(String.format("calcSum(%d,%d)", x, y));
private void runCompiledClasses(int x, int y) {
Object result1 = new CalcScript().calcSum(x, y);
LOG.info("Result of calcSum() method is {}", result1);
Object result2 = new CalcMath().calcSum(x, y);
LOG.info("Result of calcSum() method is {}", result2);
}
private void runShellScript(int x, int y) {
Script script = shell.parse(String.format("calcSum(%d,%d)", x, y));
assert script instanceof CalcScript;
Object result = ((CalcScript) script).run();
Object result = script.run();
LOG.info("Result of run() method is {}", result);
Object script2 = shell.parse("CalcScript");
assert script2 instanceof CalcScript;
Object result2 = ((CalcScript) script2).calcSum(x + 7, y + 7);
LOG.info("Result of calcSum() method is {}", result2);
Script script3 = shell.parse("");
assert script3 instanceof CalcScript;
Object result3 = script3.invokeMethod("calcSum", new Object[] { x + 14, y + 14 });
LOG.info("Result of run() method is {}", result3);
}
private void runClass(int x, int y) throws ClassNotFoundException, IllegalAccessException, InstantiationException {
private void runClassWithLoader(int x, int y) throws ClassNotFoundException, IllegalAccessException, InstantiationException {
Class calcClass = loader.loadClass("com.baeldung.CalcMath");
Object calc = calcClass.newInstance();
assert calc instanceof CalcMath;
Object result = ((CalcMath) calc).calcSum(x, y);
LOG.info("Result is {}", result);
Object result2 = ((GroovyObject) calc).invokeMethod("calcSum", new Object[] { x + 14, y + 14 });
LOG.info("Result is {}", result2);
}
public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException {
private void runClassWithEngine(int x, int y) throws ClassNotFoundException, IllegalAccessException, InstantiationException, ResourceException, ScriptException {
Class<GroovyObject> calcClass = engine.loadScriptByName("CalcMath.groovy");
GroovyObject calc = calcClass.newInstance();
Object result = calc.invokeMethod("calcSum", new Object[] { x, y });
//WARNING the following will throw a ClassCastException
//((CalcMath)calc).calcSum(1,2);
LOG.info("Result is {}", result);
}
private void runClassWithEngineFactory(int x, int y) throws ClassNotFoundException, IllegalAccessException, InstantiationException, ResourceException, ScriptException, javax.script.ScriptException {
ScriptEngine engine = new GroovyScriptEngineFactory().getScriptEngine();
Class calcClass = (Class) ((Compilable) engine).compile("com.baeldung.CalcMath").eval();
Object calc = calcClass.newInstance();
Object result = ((CalcMath) calc).calcSum(1, 20);
LOG.info("Result is {}", result);
}
public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException, ResourceException, ScriptException, IOException, javax.script.ScriptException {
App app = new App();
LOG.info("Running an already compiled groovy class instance...");
app.runCompiledClasses(5, 10);
LOG.info("Running a groovy script...");
app.runScript(5, 10);
app.runShellScript(5, 10);
LOG.info("Running a groovy class...");
app.runClass(1, 3);
app.runClassWithLoader(1, 3);
LOG.info("Running a groovy class using the engine...");
app.runClassWithEngine(10, 30);
LOG.info("Running a groovy class using the engine factory...");
app.runClassWithEngineFactory(10, 30);
}
}