package net.bytebuddy.asm;
import net.bytebuddy.ByteBuddy;
import net.bytebuddy.dynamic.loading.ClassLoadingStrategy;
import net.bytebuddy.implementation.bytecode.assign.Assigner;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import java.util.Arrays;
import java.util.Collection;
import static net.bytebuddy.matcher.ElementMatchers.named;
import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.MatcherAssert.assertThat;
@RunWith(Parameterized.class)
public class AdviceBoxedParameterAssignmentTest {
private static final String FOO = "foo";
private static final byte NUMERIC_VALUE = 42;
@Parameterized.Parameters
public static Collection<Object[]> data() {
return Arrays.asList(new Object[][]{
{VoidAssignment.class, null, new Object[0], new Class<?>[0]},
{BooleanAssignment.class, true, new Object[]{false}, new Class<?>[]{boolean.class}},
{ByteAssignment.class, NUMERIC_VALUE, new Object[]{(byte) 0}, new Class<?>[]{byte.class}},
{ShortAssignment.class, (short) NUMERIC_VALUE, new Object[]{(short) 0}, new Class<?>[]{short.class}},
{CharacterAssignment.class, (char) NUMERIC_VALUE, new Object[]{(char) 0}, new Class<?>[]{char.class}},
{IntegerAssignment.class, (int) NUMERIC_VALUE, new Object[]{0}, new Class<?>[]{int.class}},
{LongAssignment.class, (long) NUMERIC_VALUE, new Object[]{(long) 0}, new Class<?>[]{long.class}},
{FloatAssignment.class, (float) NUMERIC_VALUE, new Object[]{(float) 0}, new Class<?>[]{float.class}},
{DoubleAssignment.class, (double) NUMERIC_VALUE, new Object[]{(double) 0}, new Class<?>[]{double.class}},
{ReferenceAssignment.class, FOO, new Object[]{null}, new Class<?>[]{String.class}},
{ReferenceAssignmentNoCast.class, FOO, new Object[]{null}, new Class<?>[]{Object.class}},
});
}
private final Class<?> type;
private final Object expected;
private final Object[] provided;
private final Class<?>[] parameterTypes;
public AdviceBoxedParameterAssignmentTest(Class<?> type, Object expected, Object[] provided, Class<?>[] parameterTypes) {
this.type = type;
this.expected = expected;
this.provided = provided;
this.parameterTypes = parameterTypes;
}
@Test
public void testAssignment() throws Exception {
Class<?> dynamicType = new ByteBuddy()
.redefine(type)
.visit(Advice.to(type).on(named(FOO)))
.make()
.load(ClassLoadingStrategy.BOOTSTRAP_LOADER, ClassLoadingStrategy.Default.WRAPPER)
.getLoaded();
assertThat(dynamicType.getDeclaredMethod(FOO, parameterTypes).invoke(dynamicType.getDeclaredConstructor().newInstance(), provided), is(expected));
}
@SuppressWarnings("all")
public static class VoidAssignment {
public void foo() {
/* empty */
}
@Advice.OnMethodEnter
private static void enter(@Advice.AllArguments(readOnly = false, typing = Assigner.Typing.DYNAMIC) Object[] value) {
value = new Object[0];
}
}
@SuppressWarnings("all")
public static class BooleanAssignment {
public boolean foo(boolean value) {
return value;
}
@Advice.OnMethodEnter
private static void enter(@Advice.AllArguments(readOnly = false, typing = Assigner.Typing.DYNAMIC) Object[] value) {
value = new Object[]{true};
}
}
@SuppressWarnings("all")
public static class ByteAssignment {
public byte foo(byte value) {
return value;
}
@Advice.OnMethodEnter
private static void enter(@Advice.AllArguments(readOnly = false, typing = Assigner.Typing.DYNAMIC) Object[] value) {
value = new Object[]{(byte) NUMERIC_VALUE};
}
}
@SuppressWarnings("all")
public static class ShortAssignment {
public short foo(short value) {
return value;
}
@Advice.OnMethodEnter
private static void enter(@Advice.AllArguments(readOnly = false, typing = Assigner.Typing.DYNAMIC) Object[] value) {
value = new Object[]{(short) NUMERIC_VALUE};
}
}
@SuppressWarnings("all")
public static class CharacterAssignment {
public char foo(char value) {
return value;
}
@Advice.OnMethodEnter
private static void enter(@Advice.AllArguments(readOnly = false, typing = Assigner.Typing.DYNAMIC) Object[] value) {
value = new Object[]{(char) NUMERIC_VALUE};
}
}
@SuppressWarnings("all")
public static class IntegerAssignment {
public int foo(int value) {
return value;
}
@Advice.OnMethodEnter
private static void enter(@Advice.AllArguments(readOnly = false, typing = Assigner.Typing.DYNAMIC) Object[] value) {
value = new Object[]{(int) NUMERIC_VALUE};
}
}
@SuppressWarnings("all")
public static class LongAssignment {
public long foo(long value) {
return value;
}
@Advice.OnMethodEnter
private static void enter(@Advice.AllArguments(readOnly = false, typing = Assigner.Typing.DYNAMIC) Object[] value) {
value = new Object[]{(long) NUMERIC_VALUE};
}
}
@SuppressWarnings("all")
public static class FloatAssignment {
public float foo(float value) {
return value;
}
@Advice.OnMethodEnter
private static void enter(@Advice.AllArguments(readOnly = false, typing = Assigner.Typing.DYNAMIC) Object[] value) {
value = new Object[]{(float) NUMERIC_VALUE};
}
}
@SuppressWarnings("all")
public static class DoubleAssignment {
public double foo(double value) {
return value;
}
@Advice.OnMethodEnter
private static void enter(@Advice.AllArguments(readOnly = false, typing = Assigner.Typing.DYNAMIC) Object[] value) {
value = new Object[]{(double) NUMERIC_VALUE};
}
}
@SuppressWarnings("all")
public static class ReferenceAssignment {
public String foo(String value) {
return value;
}
@Advice.OnMethodEnter
private static void enter(@Advice.AllArguments(readOnly = false, typing = Assigner.Typing.DYNAMIC) Object[] value) {
value = new Object[]{FOO};
}
}
@SuppressWarnings("all")
public static class ReferenceAssignmentNoCast {
public Object foo(Object value) {
return value;
}
@Advice.OnMethodEnter
private static void enter(@Advice.AllArguments(readOnly = false, typing = Assigner.Typing.DYNAMIC) Object[] value) {
value = new Object[]{FOO};
}
}
}