/*
Copyright 2009-2013 Attila Szegedi
Licensed under both the Apache License, Version 2.0 (the "Apache License")
and the BSD License (the "BSD License"), with licensee being free to
choose either of the two at their discretion.
You may not use this file except in compliance with either the Apache
License or the BSD License.
If you choose to use this file in compliance with the Apache License, the
following notice applies to you:
You may obtain a copy of the Apache License at
http://www.apache.org/licenses/LICENSE-2.0
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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.
If you choose to use this file in compliance with the BSD License, the
following notice applies to you:
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modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
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package org.dynalang.dynalink.beans;
import static org.dynalang.dynalink.beans.TestBeansLinker.createCallSiteDescriptor;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodType;
import java.lang.reflect.Array;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import junit.framework.TestCase;
import org.dynalang.dynalink.CallSiteDescriptor;
import org.dynalang.dynalink.DynamicLinker;
import org.dynalang.dynalink.DynamicLinkerFactory;
import org.dynalang.dynalink.LinkerServicesFactory;
import org.dynalang.dynalink.linker.GuardedInvocation;
import org.dynalang.dynalink.linker.GuardingDynamicLinker;
import org.dynalang.dynalink.support.LinkRequestImpl;
public class TestLengthGetter extends TestCase {
public void testEarlyBoundArrayLengthGetter() throws Throwable {
testEarlyBoundArrayLengthGetter(byte[].class);
testEarlyBoundArrayLengthGetter(short[].class);
testEarlyBoundArrayLengthGetter(char[].class);
testEarlyBoundArrayLengthGetter(int[].class);
testEarlyBoundArrayLengthGetter(long[].class);
testEarlyBoundArrayLengthGetter(float[].class);
testEarlyBoundArrayLengthGetter(double[].class);
testEarlyBoundArrayLengthGetter(Object[].class);
testEarlyBoundArrayLengthGetter(String[].class);
}
private static GuardedInvocation getGuardedInvocation(GuardingDynamicLinker linker, CallSiteDescriptor descriptor,
Object... args) throws Exception {
return linker.getGuardedInvocation(new LinkRequestImpl(descriptor, false, args),
LinkerServicesFactory.getLinkerServices(linker));
}
private static void testEarlyBoundArrayLengthGetter(Class<?> arrayClass) throws Throwable {
testEarlyBoundArrayLengthGetter(arrayClass, "getLength", true);
}
private static void testEarlyBoundArrayLengthGetter(Class<?> arrayClass, String op, boolean early) throws Throwable {
final BeansLinker bl = new BeansLinker();
final CallSiteDescriptor csd =
createCallSiteDescriptor("dyn:" + op, MethodType.methodType(int.class, arrayClass));
final Object array = Array.newInstance(arrayClass.getComponentType(), 2);
final GuardedInvocation inv = getGuardedInvocation(bl, csd, array);
if(early) {
// early bound, as call site guarantees we'll pass an array
assertNull(inv.getGuard());
}
final MethodHandle mh = inv.getInvocation();
assertNotNull(mh);
assertEquals(csd.getMethodType(), mh.type());
assertEquals(2, mh.invokeWithArguments(array));
}
private static void testArrayLengthPropertyGetter(Class<?> arrayClass) throws Throwable {
testEarlyBoundArrayLengthGetter(arrayClass, "getProp:length", false);
}
public static void testArrayLengthPropertyGetter() throws Throwable {
testArrayLengthPropertyGetter(byte[].class);
testArrayLengthPropertyGetter(short[].class);
testArrayLengthPropertyGetter(char[].class);
testArrayLengthPropertyGetter(int[].class);
testArrayLengthPropertyGetter(long[].class);
testArrayLengthPropertyGetter(float[].class);
testArrayLengthPropertyGetter(double[].class);
testArrayLengthPropertyGetter(Object[].class);
testArrayLengthPropertyGetter(String[].class);
}
public void testEarlyBoundCollectionLengthGetter() throws Throwable {
final BeansLinker bl = new BeansLinker();
final CallSiteDescriptor csd =
createCallSiteDescriptor("dyn:getLength", MethodType.methodType(int.class, List.class));
final GuardedInvocation inv = getGuardedInvocation(bl, csd, Collections.EMPTY_LIST);
assertNull(inv.getGuard());
final MethodHandle mh = inv.getInvocation();
assertNotNull(mh);
assertEquals(csd.getMethodType(), mh.type());
assertEquals(0, mh.invokeWithArguments(new Object[] { Collections.EMPTY_LIST }));
assertEquals(2, mh.invokeWithArguments(new Object[] { Arrays.asList(new Object[] { "a", "b" }) }));
}
public void testEarlyBoundMapLengthGetter() throws Throwable {
final BeansLinker bl = new BeansLinker();
final CallSiteDescriptor csd =
createCallSiteDescriptor("dyn:getLength", MethodType.methodType(int.class, Map.class));
final GuardedInvocation inv = getGuardedInvocation(bl, csd, Collections.EMPTY_MAP);
assertNull(inv.getGuard());
final MethodHandle mh = inv.getInvocation();
assertNotNull(mh);
assertEquals(csd.getMethodType(), mh.type());
assertEquals(0, mh.invokeWithArguments(Collections.EMPTY_MAP));
assertEquals(1, mh.invokeWithArguments(Collections.singletonMap("a", "b")));
}
public void testLateBoundLengthGetter() throws Throwable {
final DynamicLinker linker = new DynamicLinkerFactory().createLinker();
final RelinkCountingCallSite callSite =
new RelinkCountingCallSite("dyn:getLength", MethodType.methodType(int.class, Object.class));
linker.link(callSite);
assertEquals(0, callSite.getRelinkCount());
MethodHandle callSiteInvoker = callSite.dynamicInvoker();
assertEquals(2, callSiteInvoker.invokeWithArguments(new int[2]));
assertEquals(1, callSite.getRelinkCount());
assertEquals(3, callSiteInvoker.invokeWithArguments(new Object[] { new Object[3] }));
// No relink - length getter applies to all array classes
assertEquals(1, callSite.getRelinkCount());
assertEquals(4, callSiteInvoker.invokeWithArguments(new long[4]));
// Still no relink
assertEquals(1, callSite.getRelinkCount());
assertEquals(5, callSiteInvoker.invokeWithArguments(new Object[] { Arrays.asList(new Object[5]) }));
// Relinked for collections
assertEquals(2, callSite.getRelinkCount());
assertEquals(0, callSiteInvoker.invokeWithArguments(new HashSet<Object>()));
// No relink for various collection types
assertEquals(2, callSite.getRelinkCount());
assertEquals(1, callSiteInvoker.invokeWithArguments(Collections.singletonMap("1", "2")));
// Relinked for maps
assertEquals(3, callSite.getRelinkCount());
assertEquals(0, callSiteInvoker.invokeWithArguments(new HashMap<Object, Object>()));
// No relink for various map types
assertEquals(3, callSite.getRelinkCount());
assertEquals(6, callSiteInvoker.invokeWithArguments(new long[6]));
// Relinked again for arrays
assertEquals(4, callSite.getRelinkCount());
}
}