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mockit.internal.faking.FakeMethods Maven / Gradle / Ivy
/*
* Copyright (c) 2006 JMockit developers
* This file is subject to the terms of the MIT license (see LICENSE.txt).
*/
package mockit.internal.faking;
import java.lang.reflect.*;
import java.util.*;
import javax.annotation.*;
import static java.lang.reflect.Modifier.*;
import mockit.internal.*;
import mockit.internal.reflection.*;
import mockit.internal.state.*;
import mockit.internal.util.*;
import mockit.internal.reflection.GenericTypeReflection.*;
import static mockit.internal.util.ObjectMethods.*;
/**
* A container for the fake methods "collected" from a fake class.
*/
final class FakeMethods
{
@Nonnull private final Class realClass;
private final boolean targetTypeIsAClass;
private final boolean reentrantRealClass;
@Nonnull private final List methods;
@Nullable private FakeMethod adviceMethod;
@Nonnull private final GenericTypeReflection typeParametersToTypeArguments;
@Nonnull private String fakeClassInternalName;
@Nullable private List fakeStates;
final class FakeMethod {
private final int access;
@Nonnull final String name;
@Nonnull final String desc;
private final boolean isByNameOnly;
final boolean isAdvice;
@Nonnull final String fakeDescWithoutInvocationParameter;
private boolean hasMatchingRealMethod;
@Nullable private GenericSignature fakeSignature;
private int indexForFakeState;
private boolean nativeRealMethod;
private FakeMethod(int access, @Nonnull String name, @Nonnull String desc) {
this.access = access;
this.name = name;
this.desc = desc;
if (desc.contains("Lmockit/Invocation;")) {
fakeDescWithoutInvocationParameter = '(' + desc.substring(20);
isByNameOnly = name.charAt(0) != '$' && fakeDescWithoutInvocationParameter.startsWith("()");
isAdvice = "$advice".equals(name) && "()Ljava/lang/Object;".equals(fakeDescWithoutInvocationParameter);
}
else {
fakeDescWithoutInvocationParameter = desc;
isByNameOnly = false;
isAdvice = false;
}
hasMatchingRealMethod = false;
indexForFakeState = -1;
}
@SuppressWarnings("StringEquality") boolean hasInvocationParameter() { return desc != fakeDescWithoutInvocationParameter; }
boolean hasInvocationParameterOnly() { return isByNameOnly || isAdvice; }
boolean isMatch(int realAccess, @Nonnull String realName, @Nonnull String realDesc, @Nullable String signature) {
if (name.equals(realName) && hasMatchingParameters(realDesc, signature)) {
hasMatchingRealMethod = true;
nativeRealMethod = isNative(realAccess);
return true;
}
return false;
}
private boolean hasMatchingParameters(@Nonnull String methodDesc, @Nullable String signature) {
boolean sameParametersIgnoringGenerics = fakeDescWithoutInvocationParameter.equals(methodDesc);
if (sameParametersIgnoringGenerics || signature == null) {
return sameParametersIgnoringGenerics;
}
if (fakeSignature == null) {
fakeSignature = typeParametersToTypeArguments.parseSignature(fakeDescWithoutInvocationParameter);
}
return fakeSignature.satisfiesGenericSignature(signature);
}
boolean isMatchByName(@Nonnull String realName) { return isByNameOnly && name.equals(realName); }
@Nonnull Class getRealClass() { return realClass; }
@Nonnull String getFakeNameAndDesc() { return name + desc; }
int getIndexForFakeState() { return indexForFakeState; }
boolean isStatic() { return Modifier.isStatic(access); }
boolean isPublic() { return Modifier.isPublic(access); }
boolean isForGenericMethod() { return fakeSignature != null; }
boolean isForNativeMethod() { return nativeRealMethod; }
boolean requiresFakeState() { return hasInvocationParameter() || reentrantRealClass; }
boolean canBeReentered() { return targetTypeIsAClass && !nativeRealMethod; }
@Override @SuppressWarnings("EqualsWhichDoesntCheckParameterClass")
public boolean equals(Object obj) {
FakeMethod other = (FakeMethod) obj;
return realClass == other.getRealClass() && name.equals(other.name) && desc.equals(other.desc);
}
@Override
public int hashCode() {
return 31 * (31 * realClass.hashCode() + name.hashCode()) + desc.hashCode();
}
}
FakeMethods(@Nonnull Class realClass, @Nonnull Type targetType) {
this.realClass = realClass;
if (realClass == targetType) {
targetTypeIsAClass = true;
}
else {
Class targetClass = Utilities.getClassType(targetType);
targetTypeIsAClass = !targetClass.isInterface();
}
reentrantRealClass = targetTypeIsAClass && ClassLoadingBridge.instanceOfClassThatParticipatesInClassLoading(realClass);
methods = new ArrayList<>();
typeParametersToTypeArguments = new GenericTypeReflection(realClass, targetType);
fakeClassInternalName = "";
}
@Nonnull Class getRealClass() { return realClass; }
@Nullable
FakeMethod addMethod(boolean fromSuperClass, int access, @Nonnull String name, @Nonnull String desc) {
if (fromSuperClass && isMethodAlreadyAdded(name, desc)) {
return null;
}
FakeMethod fakeMethod = new FakeMethod(access, name, desc);
if (fakeMethod.isAdvice) {
adviceMethod = fakeMethod;
}
else {
methods.add(fakeMethod);
}
return fakeMethod;
}
private boolean isMethodAlreadyAdded(@Nonnull String name, @Nonnull String desc) {
int p = desc.lastIndexOf(')');
String params = desc.substring(0, p + 1);
for (FakeMethod fakeMethod : methods) {
if (fakeMethod.name.equals(name) && fakeMethod.desc.startsWith(params)) {
return true;
}
}
return false;
}
void addFakeState(@Nonnull FakeState fakeState) {
if (fakeStates == null) {
fakeStates = new ArrayList<>(4);
}
fakeState.fakeMethod.indexForFakeState = fakeStates.size();
fakeStates.add(fakeState);
}
/**
* Finds a fake method with the same signature of a given real method, if previously collected from the fake class.
* Also handles "match-by-name-only" fake methods with only the Invocation parameter, and the $advice fake method.
*
* This operation can be performed only once for any given fake method in this container, so that after the last real method is processed
* there should be no fake methods left unused in the container.
*/
@Nullable
FakeMethod findMethod(int access, @Nonnull String name, @Nonnull String desc, @Nullable String signature) {
FakeMethod fakeMethodMatchingByNameOnly = null;
for (FakeMethod fakeMethod : methods) {
if (fakeMethod.isMatch(access, name, desc, signature)) {
return fakeMethod;
}
if (fakeMethod.isMatchByName(name)) {
fakeMethodMatchingByNameOnly = fakeMethod;
}
}
if (fakeMethodMatchingByNameOnly != null) {
return fakeMethodMatchingByNameOnly;
}
if (adviceMethod != null && !isNative(access) && !isConstructorOrClassInitialization(name) && !isMethodFromObject(name, desc)) {
return adviceMethod;
}
return null;
}
private static boolean isConstructorOrClassInitialization(@Nonnull String memberName) {
return "$init".equals(memberName) || "$clinit".equals(memberName);
}
@Nonnull String getFakeClassInternalName() { return fakeClassInternalName; }
void setFakeClassInternalName(@Nonnull String fakeClassInternalName) { this.fakeClassInternalName = fakeClassInternalName.intern(); }
boolean hasUnusedFakes() {
if (adviceMethod != null) {
return true;
}
for (FakeMethod method : methods) {
if (!method.hasMatchingRealMethod) {
return true;
}
}
return false;
}
void registerFakeStates(@Nonnull Object fake, boolean forStartupFake) {
if (fakeStates != null) {
FakeStates allFakeStates = TestRun.getFakeStates();
if (forStartupFake) {
allFakeStates.addStartupFakeAndItsFakeStates(fake, fakeStates);
}
else {
allFakeStates.addFakeAndItsFakeStates(fake, fakeStates);
}
}
}
}