/**
* Copyright 2012 Douglas Campos <qmx@qmx.me>
*
* 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 me.qmx.jitescript;
import static me.qmx.jitescript.CodeBlock.newCodeBlock;
import static me.qmx.jitescript.util.CodegenUtils.c;
import static me.qmx.jitescript.util.CodegenUtils.ci;
import static me.qmx.jitescript.util.CodegenUtils.p;
import static me.qmx.jitescript.util.CodegenUtils.sig;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import java.io.PrintStream;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.function.UnaryOperator;
import org.junit.Assert;
import org.junit.Test;
/**
* @author qmx
*/
@SuppressWarnings("unchecked")
public class JiteClassTest {
public static class DynamicClassLoader extends ClassLoader {
public Class<?> define(JiteClass jiteClass) {
return define(jiteClass, JDKVersion.V1_8);
}
public Class<?> define(JiteClass jiteClass, JDKVersion version) {
byte[] classBytes = jiteClass.toBytes(version);
return super.defineClass(c(jiteClass.getClassName()), classBytes, 0, classBytes.length);
}
}
@Test
public void testDSL() throws NoSuchMethodException, IllegalAccessException, IllegalArgumentException, InvocationTargetException {
final String className = "helloTest";
JiteClass jiteClass = new JiteClass(className) {{
// you can use the pre-constructor style
defineMethod("main", ACC_PUBLIC | ACC_STATIC, sig(void.class, String[].class), new CodeBlock() {{
ldc("helloWorld");
getstatic(p(System.class), "out", ci(PrintStream.class));
swap();
invokevirtual(p(PrintStream.class), "println", sig(void.class, Object.class));
voidreturn();
}});
// or use chained api
defineMethod("hello", ACC_PUBLIC | ACC_STATIC, sig(String.class),
newCodeBlock()
.ldc("helloWorld")
.areturn()
);
}};
Class<?> clazz = new DynamicClassLoader().define(jiteClass);
Method helloMethod = clazz.getMethod("hello");
Object result = helloMethod.invoke(null);
Assert.assertEquals("helloWorld", result);
Method mainMethod = clazz.getMethod("main", String[].class);
mainMethod.invoke(null, (Object) new String[]{});
}
@Test
public void testInterfaceImpl() throws IllegalAccessException, InstantiationException {
String className = "Test";
JiteClass jiteClass = new JiteClass(className, new String[]{p(Runnable.class)}) {{
defineDefaultConstructor();
defineMethod("run", ACC_PUBLIC, sig(void.class),
newCodeBlock()
.ldc("Test")
.aprintln()
.voidreturn()
);
}};
Class<?> clazz = new DynamicClassLoader().define(jiteClass);
Object o = clazz.newInstance();
assertTrue(o instanceof Runnable);
}
public static class LOL {
}
@Test
public void generateClassWithSuperclasses() throws IllegalAccessException, InstantiationException {
String className = "Teste";
String superClass = p(LOL.class);
JiteClass jiteClass = new JiteClass(className, superClass, new String[]{}) {{
defineDefaultConstructor();
}};
Class<?> clazz = new DynamicClassLoader().define(jiteClass);
Object o = clazz.newInstance();
assertTrue(o instanceof LOL);
}
public static class NondefaultConstructor {
public String foo = "hello";
}
@Test
public void superclassHashNondefaultConstructor() throws IllegalAccessException, InstantiationException {
String className = "Sub";
String superClass = p(NondefaultConstructor.class);
JiteClass jiteClass = new JiteClass(className, superClass, new String[]{}) {{
defineDefaultConstructor();
}};
Class<?> clazz = new DynamicClassLoader().define(jiteClass);
NondefaultConstructor o = (NondefaultConstructor)clazz.newInstance();
assertEquals("hello", o.foo);
}
@Test
public void testFields() throws Exception {
JiteClass jiteClass = new JiteClass("testFields", p(Object.class), new String[0]) {{
defineField("foo", ACC_PUBLIC | ACC_STATIC, ci(String.class), "bar");
}};
Class<?> clazz = new DynamicClassLoader().define(jiteClass);
Field foo = clazz.getDeclaredField("foo");
assertEquals("foo field was not a string", String.class, foo.getType());
assertEquals("foo field was not set to 'bar'", "bar", foo.get(null));
}
@Test(expected = IllegalAccessException.class)
public void testPrivateClass() throws Exception {
JiteClass jiteClass = new JiteClass("Test", new String[0]) {{
setAccess(ACC_PRIVATE);
defineDefaultConstructor();
}};
Class<?> clazz = new DynamicClassLoader().define(jiteClass);
clazz.newInstance();
}
@Test(expected = IllegalAccessException.class)
public void testPrivateConstructor() throws Exception {
JiteClass jiteClass = new JiteClass("Test", new String[0]) {{
defineDefaultConstructor(ACC_PRIVATE);
}};
Class<?> clazz = new DynamicClassLoader().define(jiteClass);
clazz.newInstance();
}
@Test
public void testPrivateInnerClass() throws Exception {
JiteClass parent = new JiteClass("test/Parent") {{
setAccess(ACC_PUBLIC);
defineDefaultConstructor();
addChildClass(new JiteClass(getClassName() + "$Child") {{
setAccess(ACC_PRIVATE);
defineDefaultConstructor();
}});
}};
DynamicClassLoader classLoader = new DynamicClassLoader();
classLoader.define(parent);
for (JiteClass child : parent.getChildClasses()) {
Class<?> childClazz = classLoader.define(child);
assertFalse(childClazz.getConstructor(new Class[0]).isAccessible());
}
}
@SuppressWarnings("unchecked")
@Test
public void testLambda() throws Exception {
if (!System.getProperty("java.version").startsWith("1.8")) {
System.out.println("Can't run test without Java 8");
return;
}
JiteClass test = new JiteClass("Test", new String[0]) {{
final JiteClass jiteClass = this;
defineDefaultConstructor();
defineMethod("getCallback", ACC_PUBLIC | ACC_STATIC, sig(UnaryOperator.class), new CodeBlock() {{
ldc("Hello, ");
lambda(jiteClass, new LambdaBlock() {{
function(p(UnaryOperator.class), "apply", sig(Object.class, Object.class));
specialize(sig(String.class, String.class));
capture(String.class);
delegateTo(ACC_STATIC, sig(String.class, String.class, String.class), new CodeBlock() {{
newobj(p(StringBuilder.class));
dup();
invokespecial(p(StringBuilder.class), "<init>", sig(void.class));
aload(0);
invokevirtual(p(StringBuilder.class), "append", sig(StringBuilder.class, String.class));
aload(1);
invokevirtual(p(StringBuilder.class), "append", sig(StringBuilder.class, String.class));
ldc("!");
invokevirtual(p(StringBuilder.class), "append", sig(StringBuilder.class, String.class));
invokevirtual(p(StringBuilder.class), "toString", sig(String.class));
areturn();
}});
}});
areturn();
}});
}};
DynamicClassLoader classLoader = new DynamicClassLoader();
Class<?> clazz = classLoader.define(test, JDKVersion.V1_8);
Object callback = clazz.getMethod("getCallback").invoke(null);
shouldImplement(callback, "java.util.function.UnaryOperator");
Method method = callback.getClass().getMethod("apply", Object.class);
method.setAccessible(true);
assertEquals(method.invoke(callback, "World"), "Hello, World!");
}
private void shouldImplement(Object object, String interfaceType) {
boolean found = false;
for (Class<?> i : object.getClass().getInterfaces()) {
if (i.getCanonicalName().equals(interfaceType)) {
found = true;
break;
}
}
assertTrue(object + " does not implement " + interfaceType, found);
}
}