public void testNewArray() throws Exception {
ExprEditor ed =
new ExprEditor() {
int dim[] = {1, 2, 2, 1, 2, 2, 3};
int cdim[] = {1, 1, 2, 1, 1, 2, 2};
int counter = 0;
public void edit(NewArray expr) throws CannotCompileException {
try {
CtClass str = sloader.get("java.lang.String");
if (counter < 3) assertEquals(str, expr.getComponentType());
else assertEquals(CtClass.intType, expr.getComponentType());
assertEquals(dim[counter], expr.getDimension());
assertEquals(cdim[counter], expr.getCreatedDimensions());
expr.replace("{ i += $1; $_ = $proceed($$); }");
++counter;
} catch (NotFoundException e) {
throw new CannotCompileException(e);
}
}
};
CtClass cc = sloader.get("test2.NewArray");
CtMethod m1 = cc.getDeclaredMethod("foo");
m1.instrument(ed);
cc.writeFile();
Object obj = make(cc.getName());
assertEquals(48, invoke(obj, "run"));
}
public void testCodeGen() throws Exception {
CtClass cc = sloader.get("test2.CodeGen");
CtMethod m1 = cc.getDeclaredMethod("run");
m1.insertBefore(
"{ double d = true ? 1 : 0.1; "
+ " d = d > 0.5 ? 0.0 : - 1.0; "
+ " System.out.println(d); "
+ " String s = \"foo\"; "
+ " s = 1 + 2 + s + \"bar\"; "
+ " s += \"poi\" + 3 + seven() + seven(\":\" + ' '); "
+ " s += .14; "
+ " msg = s; "
+ " System.out.println(s); }");
// recursive type check is done if $proceed is used.
CtMethod m2 =
CtNewMethod.make(
"public int test() {"
+ " String s = $proceed(\"int\" + (3 + 0.14)) + '.'; "
+ " System.out.println(s); return s.length(); }",
cc,
"this",
"seven");
cc.addMethod(m2);
cc.writeFile();
Object obj = make(cc.getName());
assertEquals(19, invoke(obj, "run"));
assertEquals(9, invoke(obj, "test"));
}
public void testLocalVar() throws Exception {
CtClass cc = sloader.get("test2.LocalVar");
CtMethod m = cc.getDeclaredMethod("toString");
m.addLocalVariable("var", CtClass.booleanType);
m.insertBefore("{var = true; }");
m.insertAfter("{if (var) hashCode(); }", false);
cc.writeFile();
Object obj = make(cc.getName());
assertEquals(3, invoke(obj, "foo"));
}
public void testAddLocalVar() throws Exception {
CtClass cc = sloader.get("test2.AddLocalVar");
CtMethod m1 = cc.getDeclaredMethod("foo");
m1.addLocalVariable("i", CtClass.intType);
m1.insertBefore("i = 3;");
m1.insertAfter("$_ = i + 1;");
cc.writeFile();
Object obj = make(cc.getName());
assertEquals(4, invoke(obj, "foo"));
}
public void testReplaceClassName() throws Exception {
String oldName = "test2.ReplaceClassName2";
String newName = "test2.ReplaceClassName3";
CtClass cc = sloader.get("test2.ReplaceClassName");
cc.replaceClassName(oldName, newName);
cc.writeFile();
CtClass cc2 = dloader.get(cc.getName());
CtMethod m = cc2.getDeclaredMethod("foo");
assertEquals(newName, m.getParameterTypes()[0].getName());
}
public void testSuperCall() throws Exception {
CtClass cc = sloader.get("test2.SuperCall");
CtMethod m1 = cc.getDeclaredMethod("foo");
m1.instrument(
new ExprEditor() {
public void edit(MethodCall m) throws CannotCompileException {
m.replace("{ $_ = $proceed($$); }");
}
});
cc.writeFile();
Object obj = make(cc.getName());
invoke(obj, "bar");
}
public void testRemoveCall() throws Exception {
CtClass cc = sloader.get("test2.RemoveCall");
CtMethod m1 = cc.getDeclaredMethod("bar");
m1.instrument(
new ExprEditor() {
public void edit(MethodCall m) throws CannotCompileException {
m.replace("{ $_ = ($r)null; }");
}
});
cc.writeFile();
Object obj = make(cc.getName());
assertEquals(0, invoke(obj, "bar"));
}
public void testNewExprInTry() throws Exception {
ExprEditor ed =
new ExprEditor() {
public void edit(NewExpr expr) throws CannotCompileException {
expr.replace("$_ = new test2.HashMapWrapper($1, 1);");
}
};
CtClass cc = sloader.get("test2.NewExprInTry");
CtMethod m1 = cc.getDeclaredMethod("foo");
m1.instrument(ed);
cc.writeFile();
Object obj = make(cc.getName());
assertEquals(1, invoke(obj, "run"));
}
public void onWrite(ClassPool pool, String className)
throws NotFoundException, CannotCompileException {
CtClass cc = pool.get(className);
try {
if (isPersistent(className)) {
CtClass base = cc.getSuperclass();
CtConstructor cons = new CtConstructor(constructorParams, cc);
if (base.subclassOf(persistent) || base == object) {
cons.setBody(null);
cc.addConstructor(cons);
if (base == object) {
cc.setSuperclass(persistent);
}
} else {
if (!isPersistent(base.getName())) {
throw new NotFoundException(
"Base class " + base.getName() + " was not declared as persistent");
}
cons.setBody("super($0);");
cc.addConstructor(cons);
}
preprocessMethods(cc, true, true);
if (base == persistent || base == object) {
CtMethod m = new CtMethod(isRecursive, cc, null);
m.setBody("return false;");
cc.addMethod(m);
addSerializeMethods(cc, false);
} else if (base.subtypeOf(serializable)) {
addSerializeMethods(cc, true);
}
if ((cc.getModifiers() & Modifier.PRIVATE) == 0) {
CtClass f = pool.makeClass(className + "LoadFactory");
f.addInterface(factory);
CtMethod c = new CtMethod(create, f, null);
c.setBody("return new " + className + "($1);");
f.addMethod(c);
CtNewConstructor.defaultConstructor(f);
}
} else {
preprocessMethods(
cc, cc.subtypeOf(persistent) && cc != persistent, !className.startsWith("org.nachodb"));
}
} catch (Exception x) {
x.printStackTrace();
}
}
public void testMethodCall() throws Exception {
CtClass cc = sloader.get("test2.MethodCall");
CtMethod m1 = cc.getDeclaredMethod("bar");
m1.instrument(
new ExprEditor() {
public void edit(MethodCall m) throws CannotCompileException {
if ("clone".equals(m.getMethodName())) methodCallData = m.getClassName();
}
});
cc.writeFile();
assertEquals("java.lang.String[]", methodCallData);
assertEquals("java.lang.String[]", sloader.get("[Ljava/lang/String;").getName());
assertEquals("int[][]", sloader.get("[[I").getName());
}
public void testInsertLocal() throws Exception {
CtClass cc = sloader.get("test2.InsertLocal");
CtMethod m1 = cc.getDeclaredMethod("foo");
m1.insertBefore("{ i = s.length(); d = 0.14; }");
m1.insertAfter("{ field = i; }");
CtMethod m2 = cc.getDeclaredMethod("run2");
m2.insertAt(22, "{ s = \"12\"; k = 5; }");
CtMethod m3 = cc.getDeclaredMethod("run3");
m3.instrument(
new ExprEditor() {
public void edit(NewExpr n) throws CannotCompileException {
n.replace("{ i++; $_ = $proceed($$); }");
}
public void edit(FieldAccess f) throws CannotCompileException {
f.replace("{ i++; $_ = $proceed($$); }");
}
public void edit(MethodCall m) throws CannotCompileException {
m.replace("{ i++; $_ = $proceed($$); }");
}
});
cc.writeFile();
Object obj = make(cc.getName());
assertEquals(317, invoke(obj, "run"));
assertEquals(7, invoke(obj, "run2"));
assertEquals(3, invoke(obj, "run3"));
}
public void testSetExceptions() throws Exception {
CtClass cc = sloader.get("test2.SetExceptions");
CtMethod m = cc.getDeclaredMethod("f");
CtClass ex = m.getExceptionTypes()[0];
assertEquals("java.lang.Exception", ex.getName());
m.setExceptionTypes(null);
assertEquals(0, m.getExceptionTypes().length);
m.setExceptionTypes(new CtClass[0]);
assertEquals(0, m.getExceptionTypes().length);
m.setExceptionTypes(new CtClass[] {ex});
assertEquals(ex, m.getExceptionTypes()[0]);
}
public void testNewExprTry() throws Exception {
ExprEditor ed =
new ExprEditor() {
public void edit(NewExpr expr) throws CannotCompileException {
StringBuffer code = new StringBuffer(300);
code.append("{ try ");
code.append("{ $_ = $proceed($$); }");
code.append("catch (OutOfMemoryError e) {}}");
expr.replace(code.toString());
}
};
CtClass cc = sloader.get("test2.NewExprTry");
CtMethod m1 = cc.getDeclaredMethod("foo");
m1.instrument(ed);
cc.writeFile();
Object obj = make(cc.getName());
assertEquals(16, invoke(obj, "run"));
}
private void preprocessMethods(CtClass cc, boolean insertLoad, boolean wrapFieldAccess)
throws CannotCompileException {
CtMethod[] methods = cc.getDeclaredMethods();
for (int i = 0; i < methods.length; i++) {
CtMethod m = methods[i];
if (wrapFieldAccess) {
m.instrument(
new ExprEditor() {
public void edit(FieldAccess fa) throws CannotCompileException {
try {
if ((fa.getField().getModifiers() & (Modifier.TRANSIENT | Modifier.STATIC)) == 0
&& fa.getField().getDeclaringClass().subtypeOf(persistentInterface)) {
if (fa.isWriter()) {
fa.replace("{ $0.loadAndModify(); $proceed($$); }");
}
// isSelfReader is my extension of JAssist, if you
// use original version of JAssist comment the
// branch below or replace "else if" with "else".
// In first case Perst will not be able to handle
// access to foreign (non-this) fields. You should use
// getter/setter methods instead.
// In second case access to foreign fields still will be possible,
// but with significant degradation of performance and
// increased code size, because in this case before ALL access
// to fields of persistent capable object call of load() method
// will be inserted.
else if (!fa.isSelfReader()) {
fa.replace("{ $0.load(); $_ = $proceed($$); }");
}
}
} catch (NotFoundException x) {
}
}
});
}
if (insertLoad
&& !"recursiveLoading".equals(m.getName())
&& (m.getModifiers() & (Modifier.STATIC | Modifier.ABSTRACT)) == 0) {
m.insertBefore("load();");
}
}
}
public void testNewOp() throws Exception {
CtClass cc = sloader.get("test2.NewOp");
CtMethod add =
CtNewMethod.make(
"public test2.NewOp2 "
+ " addMonitoringRemoteEventListener("
+ " test2.NewOp2 listener)"
+ " throws java.rmi.RemoteException {"
+ " $0.listenerList.addElement(listener);"
+ " return new test2.NewOp2(0L, this, null, 0L);"
+ "}",
cc);
add.setModifiers(Modifier.PUBLIC);
cc.addMethod(add);
/*
CtMethod type= CtNewMethod.make(
"public test2.Where getNewType() { return new test2.Where(); }",
cc);
cc.addMethod(type);
*/
cc.writeFile();
}
public void testInsertAt() throws Exception {
CtClass cc = sloader.get("test2.InsertAt");
CtMethod m1 = cc.getDeclaredMethod("foo");
int line = 6;
int ln = m1.insertAt(line, false, null);
int ln2 = m1.insertAt(line, "counter++;");
assertEquals(ln, ln2);
assertEquals(7, ln2);
line = 8;
ln = m1.insertAt(line, false, null);
ln2 = m1.insertAt(line, "counter++;");
assertEquals(ln, ln2);
assertEquals(8, ln2);
CtMethod m2 = cc.getDeclaredMethod("bar2");
int ln3 = m2.insertAt(20, "{ int m = 13; j += m; }");
assertEquals(20, ln3);
cc.writeFile();
Object obj = make(cc.getName());
assertEquals(7, invoke(obj, "foo"));
assertEquals(25, invoke(obj, "bar"));
}
private boolean addSerializeMethods(CtClass cc, boolean callSuper)
throws NotFoundException, CannotCompileException {
CtField[] fields = cc.getDeclaredFields();
int size = 0;
StringBuffer sb = new StringBuffer();
sb.append(callSuper ? "{$2=super.pack($1, $2);$1.extend($2" : "{$1.extend($2");
for (int i = 0; i < fields.length; i++) {
CtField f = fields[i];
if ((f.getModifiers() & (Modifier.STATIC | Modifier.TRANSIENT)) == 0) {
CtClass type = f.getType();
if (type.isPrimitive()) {
if (type == CtClass.booleanType || type == CtClass.byteType) {
size += 1;
} else if (type == CtClass.charType || type == CtClass.shortType) {
size += 2;
} else if (type == CtClass.longType || type == CtClass.doubleType) {
size += 8;
} else {
size += 4;
}
} else if (type.getName().equals("java.lang.String")) {
sb.append("+org.nachodb.impl.Bytes#sizeof(");
sb.append(f.getName());
sb.append(",$3)");
} else {
return false;
}
}
}
cc.addInterface(serializable);
CtMethod m = new CtMethod(pack, cc, null);
sb.append('+');
sb.append(size);
sb.append(");");
for (int i = 0; i < fields.length; i++) {
CtField f = fields[i];
if ((f.getModifiers() & (Modifier.STATIC | Modifier.TRANSIENT)) == 0) {
CtClass type = f.getType();
String name = f.getName();
if (type == CtClass.booleanType) {
sb.append("$1.arr[$2++]=(byte)(");
sb.append(name);
sb.append("?1:0);");
} else if (type == CtClass.charType) {
sb.append("org.nachodb.impl.Bytes#pack2($1.arr,$2,(short)");
sb.append(name);
sb.append(");$2+=2;");
} else if (type == CtClass.byteType) {
sb.append("$1.arr[$2++]=");
sb.append(name);
sb.append(";");
} else if (type == CtClass.shortType) {
sb.append("org.nachodb.impl.Bytes#pack2($1.arr,$2,");
sb.append(name);
sb.append(");$2+=2;");
} else if (type == CtClass.intType) {
sb.append("org.nachodb.impl.Bytes#pack4($1.arr,$2,");
sb.append(name);
sb.append(");$2+=4;");
} else if (type == CtClass.longType) {
sb.append("org.nachodb.impl.Bytes#pack8($1.arr,$2,");
sb.append(name);
sb.append(");$2+=8;");
} else if (type == CtClass.doubleType) {
sb.append("org.nachodb.impl.Bytes#packF8($1.arr,$2,");
sb.append(name);
sb.append(");$2+=8;");
} else if (type == CtClass.floatType) {
sb.append("org.nachodb.impl.Bytes#packF4($1.arr,$2,");
sb.append(name);
sb.append(");$2+=4;");
} else {
sb.append("$2=org.nachodb.impl.Bytes#packStr($1.arr,$2,");
sb.append(name);
sb.append(",$3);");
}
}
}
sb.append("return $2;}");
m.setBody(sb.toString());
cc.addMethod(m);
m = new CtMethod(unpack, cc, null);
sb = new StringBuffer();
sb.append(callSuper ? "{$2=super.unpack($1, $2);" : "{");
for (int i = 0; i < fields.length; i++) {
CtField f = fields[i];
if ((f.getModifiers() & (Modifier.STATIC | Modifier.TRANSIENT)) == 0) {
CtClass type = f.getType();
String name = f.getName();
sb.append(name);
sb.append('=');
if (type == CtClass.booleanType) {
sb.append("$1[$2++]!=0;");
} else if (type == CtClass.charType) {
sb.append("(char)org.nachodb.impl.Bytes#unpack2($1,$2);$2+=2;");
} else if (type == CtClass.byteType) {
sb.append("$1[$2++];");
} else if (type == CtClass.shortType) {
sb.append("org.nachodb.impl.Bytes#unpack2($1,$2);$2+=2;");
} else if (type == CtClass.intType) {
sb.append("org.nachodb.impl.Bytes#unpack4($1,$2);$2+=4;");
} else if (type == CtClass.longType) {
sb.append("org.nachodb.impl.Bytes#unpack8($1,$2);$2+=8;");
} else if (type == CtClass.doubleType) {
sb.append("org.nachodb.impl.Bytes#unpackF8($1,$2);$2+=8;");
} else if (type == CtClass.floatType) {
sb.append("org.nachodb.impl.Bytes#unpackF4($1,$2);$2+=4;");
} else {
sb.append(
"org.nachodb.impl.Bytes#unpackStr($1,$2,$3);$2+=org.nachodb.impl.Bytes#sizeof($1,$2);");
}
}
}
sb.append("return $2;}");
m.setBody(sb.toString());
cc.addMethod(m);
return true;
}
public void testArrayAndNull() throws Exception {
CtClass cc = sloader.get("test2.ArrayAndNull");
CtMethod m = cc.getDeclaredMethod("test");
m.insertAfter("if ($_ == null) $_ = new int[0];");
}