org.robolectric.internal.bytecode.ShadowMap Maven / Gradle / Ivy
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package org.robolectric.internal.bytecode;
import com.google.common.collect.ArrayListMultimap;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableListMultimap;
import com.google.common.collect.ImmutableMap;
import java.lang.reflect.InvocationTargetException;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.robolectric.annotation.Implements;
import org.robolectric.internal.ShadowProvider;
import org.robolectric.sandbox.ShadowMatcher;
import org.robolectric.shadow.api.ShadowPicker;
import org.robolectric.util.Logger;
/**
* Maps from instrumented class to shadow class.
*
* We deal with class names rather than actual classes here, since a ShadowMap is built outside
* of any sandboxes, but instrumented and shadowed classes must be loaded through a {@link
* SandboxClassLoader}. We don't want to try to resolve those classes outside of a sandbox.
*
*
Once constructed, instances are immutable.
*/
@SuppressWarnings("NewApi")
public class ShadowMap {
static final ShadowMap EMPTY = new ShadowMap(ImmutableListMultimap.of(), ImmutableMap.of());
private final ImmutableListMultimap defaultShadows;
private final ImmutableMap overriddenShadows;
private final ImmutableMap shadowPickers;
public static ShadowMap createFromShadowProviders(List sortedProviders) {
final ArrayListMultimap shadowMap = ArrayListMultimap.create();
final Map shadowPickerMap = new HashMap<>();
// These are sorted in descending order (higher priority providers are first).
for (ShadowProvider provider : sortedProviders) {
Logger.debug("Shadow provider: " + provider.getClass().getName());
for (Map.Entry entry : provider.getShadows()) {
shadowMap.put(entry.getKey(), entry.getValue());
}
provider.getShadowPickerMap().forEach(shadowPickerMap::putIfAbsent);
}
return new ShadowMap(
ImmutableListMultimap.copyOf(shadowMap),
Collections.emptyMap(),
ImmutableMap.copyOf(shadowPickerMap));
}
ShadowMap(
ImmutableListMultimap defaultShadows,
Map overriddenShadows) {
this(defaultShadows, overriddenShadows, Collections.emptyMap());
}
private ShadowMap(
ImmutableListMultimap defaultShadows,
Map overriddenShadows,
Map shadowPickers) {
this.defaultShadows = ImmutableListMultimap.copyOf(defaultShadows);
this.overriddenShadows = ImmutableMap.copyOf(overriddenShadows);
this.shadowPickers = ImmutableMap.copyOf(shadowPickers);
}
public boolean hasShadowPicker(MutableClass mutableClass) {
return shadowPickers.containsKey(mutableClass.getName());
}
public ShadowInfo getShadowInfo(Class clazz, ShadowMatcher shadowMatcher) {
String instrumentedClassName = clazz.getName();
ShadowInfo shadowInfo = overriddenShadows.get(instrumentedClassName);
String shadowPickerClassName = null;
if (shadowInfo != null && shadowInfo.hasShadowPicker()) {
shadowPickerClassName = shadowInfo.getShadowPickerClass().getName();
} else if (shadowInfo == null) {
shadowPickerClassName = shadowPickers.get(instrumentedClassName);
}
if (shadowPickerClassName != null) {
shadowInfo = pickShadow(instrumentedClassName, clazz, shadowPickerClassName);
} else if (shadowInfo == null) {
try {
final ImmutableList shadowNames = defaultShadows.get(clazz.getCanonicalName());
for (String shadowName : shadowNames) {
if (shadowName != null) {
Class shadowClass = clazz.getClassLoader().loadClass(shadowName);
shadowInfo = obtainShadowInfo(shadowClass);
if (!shadowInfo.shadowedClassName.equals(instrumentedClassName)) {
// somehow we got the wrong shadow class?
shadowInfo = null;
}
if (shadowInfo != null && shadowMatcher.matches(shadowInfo)) {
return shadowInfo;
}
}
}
} catch (ClassNotFoundException | IncompatibleClassChangeError e) {
return null;
}
}
if (shadowInfo != null && !shadowMatcher.matches(shadowInfo)) {
return null;
}
return shadowInfo;
}
private ShadowInfo pickShadow(
String instrumentedClassName, Class clazz, String shadowPickerClassName) {
ClassLoader sandboxClassLoader = clazz.getClassLoader();
try {
Class> shadowPickerClass =
(Class>) sandboxClassLoader.loadClass(shadowPickerClassName);
ShadowPicker shadowPicker = shadowPickerClass.getDeclaredConstructor().newInstance();
Class selectedShadowClass = shadowPicker.pickShadowClass();
if (selectedShadowClass == null) {
return obtainShadowInfo(Object.class, true);
}
ShadowInfo shadowInfo = obtainShadowInfo(selectedShadowClass);
if (!shadowInfo.shadowedClassName.equals(instrumentedClassName)) {
throw new IllegalArgumentException(
"Implemented class for "
+ selectedShadowClass.getName()
+ " ("
+ shadowInfo.shadowedClassName
+ ") != "
+ instrumentedClassName);
}
return shadowInfo;
} catch (ClassNotFoundException
| NoSuchMethodException
| InvocationTargetException
| IllegalAccessException
| InstantiationException e) {
throw new RuntimeException("Failed to resolve shadow picker for " + instrumentedClassName, e);
}
}
public static ShadowInfo obtainShadowInfo(Class clazz) {
return obtainShadowInfo(clazz, false);
}
static ShadowInfo obtainShadowInfo(Class clazz, boolean mayBeNonShadow) {
Implements annotation = clazz.getAnnotation(Implements.class);
if (annotation == null) {
if (mayBeNonShadow) {
return null;
} else {
throw new IllegalArgumentException(clazz + " is not annotated with @Implements");
}
}
String className = annotation.className();
if (className.isEmpty()) {
className = annotation.value().getName();
}
return new ShadowInfo(className, clazz.getName(), annotation);
}
@SuppressWarnings("ReferenceEquality")
public Set getInvalidatedClasses(ShadowMap previous) {
if (this == previous && shadowPickers.isEmpty()) return Collections.emptySet();
Map invalidated = new HashMap<>(overriddenShadows);
for (Map.Entry entry : previous.overriddenShadows.entrySet()) {
String className = entry.getKey();
ShadowInfo previousConfig = entry.getValue();
ShadowInfo currentConfig = invalidated.get(className);
if (currentConfig == null) {
invalidated.put(className, previousConfig);
} else if (previousConfig.equals(currentConfig)) {
invalidated.remove(className);
}
}
return invalidated.keySet();
}
/**
* @deprecated do not use
*/
@Deprecated
public static String convertToShadowName(String className) {
String shadowClassName =
"org.robolectric.shadows.Shadow" + className.substring(className.lastIndexOf(".") + 1);
shadowClassName = shadowClassName.replaceAll("\\$", "\\$Shadow");
return shadowClassName;
}
public Builder newBuilder() {
return new Builder(this);
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (!(o instanceof ShadowMap)) return false;
ShadowMap shadowMap = (ShadowMap) o;
if (!overriddenShadows.equals(shadowMap.overriddenShadows)) return false;
return true;
}
@Override
public int hashCode() {
return overriddenShadows.hashCode();
}
public static class Builder {
private final ImmutableListMultimap defaultShadows;
private final Map overriddenShadows;
private final Map shadowPickers;
public Builder() {
defaultShadows = ImmutableListMultimap.of();
overriddenShadows = new HashMap<>();
shadowPickers = new HashMap<>();
}
public Builder(ShadowMap shadowMap) {
this.defaultShadows = shadowMap.defaultShadows;
this.overriddenShadows = new HashMap<>(shadowMap.overriddenShadows);
this.shadowPickers = new HashMap<>(shadowMap.shadowPickers);
}
public Builder addShadowClasses(Class... shadowClasses) {
for (Class shadowClass : shadowClasses) {
addShadowClass(shadowClass);
}
return this;
}
Builder addShadowClass(Class shadowClass) {
addShadowInfo(obtainShadowInfo(shadowClass));
return this;
}
Builder addShadowClass(
String realClassName,
String shadowClassName,
boolean callThroughByDefault,
boolean callNativeMethodsByDefault,
boolean looseSignatures) {
addShadowInfo(
new ShadowInfo(
realClassName,
shadowClassName,
callThroughByDefault,
callNativeMethodsByDefault,
looseSignatures,
-1,
-1,
null));
return this;
}
private void addShadowInfo(ShadowInfo shadowInfo) {
overriddenShadows.put(shadowInfo.shadowedClassName, shadowInfo);
if (shadowInfo.hasShadowPicker()) {
shadowPickers.put(
shadowInfo.shadowedClassName, shadowInfo.getShadowPickerClass().getName());
}
}
public ShadowMap build() {
return new ShadowMap(defaultShadows, overriddenShadows, shadowPickers);
}
}
}