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/* Copyright (c) 2018 Matthias Bläsing, All Rights Reserved
*
* The contents of this file is dual-licensed under 2
* alternative Open Source/Free licenses: LGPL 2.1 or later and
* Apache License 2.0. (starting with JNA version 4.0.0).
*
* You can freely decide which license you want to apply to
* the project.
*
* You may obtain a copy of the LGPL License at:
*
* http://www.gnu.org/licenses/licenses.html
*
* A copy is also included in the downloadable source code package
* containing JNA, in file "LGPL2.1".
*
* You may obtain a copy of the Apache License at:
*
* http://www.apache.org/licenses/
*
* A copy is also included in the downloadable source code package
* containing JNA, in file "AL2.0".
*/
package com.sun.jna;
import java.util.Collections;
import junit.framework.TestCase;
/**
* Test that all method call options for native calls work with NULL values
* and result in deterministic behaviour and not in a JVM crash.
*/
public class ArgumentsMarshalNullableTest extends TestCase {
public static class Int16Integer extends IntegerType {
public Int16Integer() {
super(2);
}
public Int16Integer(long value) {
super(2, value);
}
}
public static class Int16NativeMapped implements NativeMapped {
private short value;
public Int16NativeMapped() {};
public Int16NativeMapped(int value) {
this.value = (short) value;
}
public Object fromNative(Object nativeValue, FromNativeContext context) {
if(nativeValue instanceof Number) {
return new Int16NativeMapped(((Number) nativeValue).shortValue());
} else {
return null;
}
}
public Object toNative() {
return value;
}
public Class<?> nativeType() {
return short.class;
}
@Override
public String toString() {
return "Int16NativeMapped{" + "value=" + value + '}';
}
@Override
public int hashCode() {
int hash = 7;
hash = 59 * hash + this.value;
return hash;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
final Int16NativeMapped other = (Int16NativeMapped) obj;
if (this.value != other.value) {
return false;
}
return true;
}
}
public static class Int16 {
public static final FromNativeConverter fromNative = new FromNativeConverter() {
public Object fromNative(Object nativeValue, FromNativeContext context) {
if (nativeValue instanceof Number) {
return new Int16(((Number) nativeValue).shortValue());
} else {
return null;
}
}
public Class<?> nativeType() {
return short.class;
}
};
public static final ToNativeConverter toNative = new ToNativeConverter() {
public Object toNative(Object value, ToNativeContext context) {
if(value == null) {
return 0;
} else {
return ((Int16) value).value;
}
}
public Class<?> nativeType() {
return short.class;
}
};
private short value;
public Int16() {
}
public Int16(int value) {
this.value = (short) value;
}
@Override
public int hashCode() {
int hash = 7;
hash = 53 * hash + this.value;
return hash;
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null) {
return false;
}
if (getClass() != obj.getClass()) {
return false;
}
final Int16 other = (Int16) obj;
if (this.value != other.value) {
return false;
}
return true;
}
@Override
public String toString() {
return "Int16{" + "value=" + value + '}';
}
}
public static interface TestLibrary extends Library {
Int16NativeMapped returnInt16Argument(Int16NativeMapped i);
Int16Integer returnInt16Argument(Int16Integer i);
Int16 returnInt16Argument(Int16 i);
}
TestLibrary lib;
@Override
protected void setUp() {
lib = Native.load("testlib", TestLibrary.class,
Collections.singletonMap(Library.OPTION_TYPE_MAPPER, new TypeMapper() {
public FromNativeConverter getFromNativeConverter(Class<?> javaType) {
if(javaType == Int16.class) {
return Int16.fromNative;
} else {
return null;
}
}
public ToNativeConverter getToNativeConverter(Class<?> javaType) {
if(javaType == Int16.class) {
return Int16.toNative;
} else {
return null;
}
}
}));
}
@Override
protected void tearDown() {
lib = null;
}
public void testNativeMapped() {
assertEquals("Basic non-null call", new Int16NativeMapped(42), lib.returnInt16Argument(new Int16NativeMapped(42)));
assertEquals("Negative value call", new Int16NativeMapped(-42), lib.returnInt16Argument(new Int16NativeMapped(-42)));
assertEquals("null call", new Int16NativeMapped(0), lib.returnInt16Argument((Int16NativeMapped) null));
}
public void testIntegerType() {
assertEquals("Basic non-null call", new Int16Integer(42), lib.returnInt16Argument(new Int16Integer(42)));
assertEquals("Negative value call", new Int16Integer(-42), lib.returnInt16Argument(new Int16Integer(-42)));
assertEquals("null call", new Int16Integer(0), lib.returnInt16Argument((Int16Integer) null));
}
public void testTypeMapper() {
assertEquals("Basic non-null call", new Int16(42), lib.returnInt16Argument(new Int16(42)));
assertEquals("Negative value call", new Int16(-42), lib.returnInt16Argument(new Int16(-42)));
assertEquals("null call", new Int16(0), lib.returnInt16Argument((Int16) null));
}
public static void main(java.lang.String[] argList) {
junit.textui.TestRunner.run(ArgumentsMarshalNullableTest.class);
}
}
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