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A Shaded CQL ActivityType driver for http://nosqlbench.io/
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software 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.
*/
package org.codehaus.groovy.ast.tools;
import antlr.RecognitionException;
import antlr.TokenStreamException;
import groovy.transform.stc.IncorrectTypeHintException;
import org.apache.groovy.util.SystemUtil;
import org.codehaus.groovy.GroovyBugError;
import org.codehaus.groovy.antlr.AntlrParserPlugin;
import org.codehaus.groovy.antlr.parser.GroovyLexer;
import org.codehaus.groovy.antlr.parser.GroovyRecognizer;
import org.codehaus.groovy.ast.ASTNode;
import org.codehaus.groovy.ast.ClassHelper;
import org.codehaus.groovy.ast.ClassNode;
import org.codehaus.groovy.ast.GenericsType;
import org.codehaus.groovy.ast.MethodNode;
import org.codehaus.groovy.ast.ModuleNode;
import org.codehaus.groovy.ast.Parameter;
import org.codehaus.groovy.ast.stmt.EmptyStatement;
import org.codehaus.groovy.control.CompilationUnit;
import org.codehaus.groovy.control.ResolveVisitor;
import org.codehaus.groovy.control.SourceUnit;
import org.codehaus.groovy.runtime.memoize.ConcurrentSoftCache;
import org.codehaus.groovy.runtime.memoize.EvictableCache;
import org.codehaus.groovy.syntax.ParserException;
import org.codehaus.groovy.syntax.Reduction;
import java.io.StringReader;
import java.lang.ref.SoftReference;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.concurrent.atomic.AtomicReference;
import static org.codehaus.groovy.ast.GenericsType.GenericsTypeName;
import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.getCorrectedClassNode;
import static org.codehaus.groovy.transform.stc.StaticTypeCheckingSupport.implementsInterfaceOrIsSubclassOf;
/**
* Utility methods to deal with generic types.
*/
public class GenericsUtils {
public static final GenericsType[] EMPTY_GENERICS_ARRAY = GenericsType.EMPTY_ARRAY;
public static final String JAVA_LANG_OBJECT = "java.lang.Object";
/**
* Given a parameterized type and a generic type information, aligns actual type parameters. For example, if a
* class uses generic type <T,U,V>
(redirectGenericTypes), is used with actual type parameters
* <java.lang.String, U,V>
, then a class or interface using generic types <T,V>
* will be aligned to <java.lang.String,V>
*
* @param redirectGenericTypes the type arguments or the redirect class node
* @param parameterizedTypes the actual type arguments used on this class node
* @param alignmentTarget the generic type arguments to which we want to align to
* @return aligned type arguments
* @deprecated You shouldn't call this method because it is inherently unreliable
*/
@Deprecated
public static GenericsType[] alignGenericTypes(final GenericsType[] redirectGenericTypes, final GenericsType[] parameterizedTypes, final GenericsType[] alignmentTarget) {
if (alignmentTarget == null) return EMPTY_GENERICS_ARRAY;
if (parameterizedTypes == null || parameterizedTypes.length == 0) return alignmentTarget;
GenericsType[] generics = new GenericsType[alignmentTarget.length];
for (int i = 0, scgtLength = alignmentTarget.length; i < scgtLength; i++) {
final GenericsType currentTarget = alignmentTarget[i];
GenericsType match = null;
if (redirectGenericTypes != null) {
for (int j = 0; j < redirectGenericTypes.length && match == null; j++) {
GenericsType redirectGenericType = redirectGenericTypes[j];
if (redirectGenericType.isCompatibleWith(currentTarget.getType())) {
if (currentTarget.isPlaceholder() && redirectGenericType.isPlaceholder() && !currentTarget.getName().equals(redirectGenericType.getName())) {
// check if there's a potential better match
boolean skip = false;
for (int k = j + 1; k < redirectGenericTypes.length && !skip; k++) {
GenericsType ogt = redirectGenericTypes[k];
if (ogt.isPlaceholder() && ogt.isCompatibleWith(currentTarget.getType()) && ogt.getName().equals(currentTarget.getName())) {
skip = true;
}
}
if (skip) continue;
}
match = parameterizedTypes[j];
if (currentTarget.isWildcard()) {
// if alignment target is a wildcard type
// then we must make best effort to return a parameterized
// wildcard
ClassNode lower = currentTarget.getLowerBound() != null ? match.getType() : null;
ClassNode[] currentUpper = currentTarget.getUpperBounds();
ClassNode[] upper = currentUpper != null ? new ClassNode[currentUpper.length] : null;
if (upper != null) {
for (int k = 0; k < upper.length; k++) {
upper[k] = currentUpper[k].isGenericsPlaceHolder() ? match.getType() : currentUpper[k];
}
}
match = new GenericsType(ClassHelper.makeWithoutCaching("?"), upper, lower);
match.setWildcard(true);
}
}
}
}
if (match == null) {
match = currentTarget;
}
generics[i] = match;
}
return generics;
}
/**
* Generates a wildcard generic type in order to be used for checks against class nodes.
* See {@link GenericsType#isCompatibleWith(org.codehaus.groovy.ast.ClassNode)}.
*
* @param types the type to be used as the wildcard upper bound
* @return a wildcard generics type
*/
public static GenericsType buildWildcardType(final ClassNode... types) {
ClassNode base = ClassHelper.makeWithoutCaching("?");
GenericsType gt = new GenericsType(base, types, null);
gt.setWildcard(true);
return gt;
}
public static Map extractPlaceholders(ClassNode cn) {
Map ret = new HashMap();
extractPlaceholders(cn, ret);
return ret;
}
/**
* For a given classnode, fills in the supplied map with the parameterized
* types it defines.
*
* @param node the class node to check
* @param map the generics type information collector
*/
public static void extractPlaceholders(ClassNode node, Map map) {
if (node == null) return;
if (node.isArray()) {
extractPlaceholders(node.getComponentType(), map);
return;
}
if (!node.isUsingGenerics() || !node.isRedirectNode()) return;
GenericsType[] parameterized = node.getGenericsTypes();
if (parameterized == null || parameterized.length == 0) return;
GenericsType[] redirectGenericsTypes = node.redirect().getGenericsTypes();
if (redirectGenericsTypes == null ||
(node.isGenericsPlaceHolder() && redirectGenericsTypes.length != parameterized.length) /* GROOVY-8609 */ ) {
redirectGenericsTypes = parameterized;
}
if (redirectGenericsTypes.length != parameterized.length) {
throw new GroovyBugError("Expected earlier checking to detect generics parameter arity mismatch" +
"\nExpected: " + node.getName() + toGenericTypesString(redirectGenericsTypes) +
"\nSupplied: " + node.getName() + toGenericTypesString(parameterized));
}
List valueList = new LinkedList<>();
for (int i = 0; i < redirectGenericsTypes.length; i++) {
GenericsType redirectType = redirectGenericsTypes[i];
if (redirectType.isPlaceholder()) {
GenericsTypeName name = new GenericsTypeName(redirectType.getName());
if (!map.containsKey(name)) {
GenericsType value = parameterized[i];
map.put(name, value);
valueList.add(value);
}
}
}
for (GenericsType value : valueList) {
if (value.isWildcard()) {
ClassNode lowerBound = value.getLowerBound();
if (lowerBound != null) {
extractPlaceholders(lowerBound, map);
}
ClassNode[] upperBounds = value.getUpperBounds();
if (upperBounds != null) {
for (ClassNode upperBound : upperBounds) {
extractPlaceholders(upperBound, map);
}
}
} else if (!value.isPlaceholder()) {
extractPlaceholders(value.getType(), map);
}
}
}
public static String toGenericTypesString(GenericsType[] genericsTypes) {
if (genericsTypes == null) return "";
StringBuilder sb = new StringBuilder("<");
for (int i = 0, n = genericsTypes.length; i < n; i++) {
sb.append(genericsTypes[i].toString());
if (i < n - 1) {
sb.append(",");
}
}
sb.append("> ");
return sb.toString();
}
/**
* Interface class nodes retrieved from {@link org.codehaus.groovy.ast.ClassNode#getInterfaces()}
* or {@link org.codehaus.groovy.ast.ClassNode#getAllInterfaces()} are returned with generic type
* arguments. This method allows returning a parameterized interface given the parameterized class
* node which implements this interface.
*
* @param hint the class node where generics types are parameterized
* @param target the interface we want to parameterize generics types
* @return a parameterized interface class node
* @deprecated Use #parameterizeType instead
*/
@Deprecated
public static ClassNode parameterizeInterfaceGenerics(final ClassNode hint, final ClassNode target) {
return parameterizeType(hint, target);
}
/**
* Interface class nodes retrieved from {@link org.codehaus.groovy.ast.ClassNode#getInterfaces()}
* or {@link org.codehaus.groovy.ast.ClassNode#getAllInterfaces()} are returned with generic type
* arguments. This method allows returning a parameterized interface given the parameterized class
* node which implements this interface.
*
* @param hint the class node where generics types are parameterized
* @param target the interface we want to parameterize generics types
* @return a parameterized interface class node
*/
public static ClassNode parameterizeType(final ClassNode hint, final ClassNode target) {
if (hint.isArray()) {
if (target.isArray()) {
return parameterizeType(hint.getComponentType(), target.getComponentType()).makeArray();
}
return target;
}
if (!target.equals(hint) && implementsInterfaceOrIsSubclassOf(target, hint)) {
ClassNode nextSuperClass = ClassHelper.getNextSuperClass(target, hint);
if (!hint.equals(nextSuperClass)) {
Map genericsSpec = createGenericsSpec(hint);
extractSuperClassGenerics(hint, nextSuperClass, genericsSpec);
ClassNode result = correctToGenericsSpecRecurse(genericsSpec, nextSuperClass);
return parameterizeType(result, target);
}
}
Map genericsSpec = createGenericsSpec(hint);
ClassNode targetRedirect = target.redirect();
genericsSpec = createGenericsSpec(targetRedirect, genericsSpec);
extractSuperClassGenerics(hint, targetRedirect, genericsSpec);
return correctToGenericsSpecRecurse(genericsSpec, targetRedirect);
}
public static ClassNode nonGeneric(ClassNode type) {
if (type.isUsingGenerics()) {
final ClassNode nonGen = ClassHelper.makeWithoutCaching(type.getName());
nonGen.setRedirect(type);
nonGen.setGenericsTypes(null);
nonGen.setUsingGenerics(false);
return nonGen;
}
if (type.isArray() && type.getComponentType().isUsingGenerics()) {
return type.getComponentType().getPlainNodeReference().makeArray();
}
return type;
}
public static ClassNode newClass(ClassNode type) {
return type.getPlainNodeReference();
}
public static ClassNode makeClassSafe(Class klass) {
return makeClassSafeWithGenerics(ClassHelper.make(klass));
}
public static ClassNode makeClassSafeWithGenerics(Class klass, ClassNode genericsType) {
GenericsType[] genericsTypes = new GenericsType[1];
genericsTypes[0] = new GenericsType(genericsType);
return makeClassSafeWithGenerics(ClassHelper.make(klass), genericsTypes);
}
public static ClassNode makeClassSafe0(ClassNode type, GenericsType... genericTypes) {
ClassNode plainNodeReference = newClass(type);
if (genericTypes != null && genericTypes.length > 0) {
plainNodeReference.setGenericsTypes(genericTypes);
if (type.isGenericsPlaceHolder()) plainNodeReference.setGenericsPlaceHolder(true);
}
return plainNodeReference;
}
public static ClassNode makeClassSafeWithGenerics(ClassNode type, GenericsType... genericTypes) {
if (type.isArray()) {
return makeClassSafeWithGenerics(type.getComponentType(), genericTypes).makeArray();
}
GenericsType[] gtypes = GenericsType.EMPTY_ARRAY;
if (genericTypes != null) {
gtypes = new GenericsType[genericTypes.length];
System.arraycopy(genericTypes, 0, gtypes, 0, gtypes.length);
}
return makeClassSafe0(type, gtypes);
}
public static MethodNode correctToGenericsSpec(Map genericsSpec, MethodNode mn) {
ClassNode correctedType = correctToGenericsSpecRecurse(genericsSpec, mn.getReturnType());
Parameter[] origParameters = mn.getParameters();
Parameter[] newParameters = new Parameter[origParameters.length];
for (int i = 0; i < origParameters.length; i++) {
Parameter origParameter = origParameters[i];
newParameters[i] = new Parameter(correctToGenericsSpecRecurse(genericsSpec, origParameter.getType()), origParameter.getName(), origParameter.getInitialExpression());
}
return new MethodNode(mn.getName(), mn.getModifiers(), correctedType, newParameters, mn.getExceptions(), mn.getCode());
}
public static ClassNode correctToGenericsSpecRecurse(Map genericsSpec, ClassNode type) {
return correctToGenericsSpecRecurse(genericsSpec, type, new ArrayList());
}
/**
* @since 2.4.1
*/
public static ClassNode[] correctToGenericsSpecRecurse(Map genericsSpec, ClassNode[] types) {
if (types == null || types.length == 1) return types;
ClassNode[] newTypes = new ClassNode[types.length];
boolean modified = false;
for (int i = 0; i < types.length; i++) {
newTypes[i] = correctToGenericsSpecRecurse(genericsSpec, types[i], new ArrayList());
modified = modified || (types[i] != newTypes[i]);
}
if (!modified) return types;
return newTypes;
}
public static ClassNode correctToGenericsSpecRecurse(Map genericsSpec, ClassNode type, List exclusions) {
if (type.isArray()) {
return correctToGenericsSpecRecurse(genericsSpec, type.getComponentType(), exclusions).makeArray();
}
if (type.isGenericsPlaceHolder() && !exclusions.contains(type.getUnresolvedName())) {
String name = type.getGenericsTypes()[0].getName();
type = genericsSpec.get(name);
if (type != null && type.isGenericsPlaceHolder() && type.getGenericsTypes() == null) {
ClassNode placeholder = ClassHelper.makeWithoutCaching(type.getUnresolvedName());
placeholder.setGenericsPlaceHolder(true);
type = makeClassSafeWithGenerics(type, new GenericsType(placeholder));
}
}
if (type == null) type = ClassHelper.OBJECT_TYPE;
GenericsType[] oldgTypes = type.getGenericsTypes();
GenericsType[] newgTypes = GenericsType.EMPTY_ARRAY;
if (oldgTypes != null) {
newgTypes = new GenericsType[oldgTypes.length];
for (int i = 0; i < newgTypes.length; i++) {
GenericsType oldgType = oldgTypes[i];
if (oldgType.isPlaceholder()) {
if (genericsSpec.get(oldgType.getName()) != null) {
newgTypes[i] = new GenericsType(genericsSpec.get(oldgType.getName()));
} else {
newgTypes[i] = new GenericsType(ClassHelper.OBJECT_TYPE);
}
} else if (oldgType.isWildcard()) {
ClassNode oldLower = oldgType.getLowerBound();
ClassNode lower = oldLower != null ? correctToGenericsSpecRecurse(genericsSpec, oldLower, exclusions) : null;
ClassNode[] oldUpper = oldgType.getUpperBounds();
ClassNode[] upper = null;
if (oldUpper != null) {
upper = new ClassNode[oldUpper.length];
for (int j = 0; j < oldUpper.length; j++) {
upper[j] = correctToGenericsSpecRecurse(genericsSpec, oldUpper[j], exclusions);
}
}
GenericsType fixed = new GenericsType(oldgType.getType(), upper, lower);
fixed.setName(oldgType.getName());
fixed.setWildcard(true);
newgTypes[i] = fixed;
} else {
newgTypes[i] = new GenericsType(correctToGenericsSpecRecurse(genericsSpec, correctToGenericsSpec(genericsSpec, oldgType), exclusions));
}
}
}
return makeClassSafeWithGenerics(type, newgTypes);
}
public static ClassNode correctToGenericsSpec(Map genericsSpec, GenericsType type) {
ClassNode ret = null;
if (type.isPlaceholder()) {
String name = type.getName();
ret = genericsSpec.get(name);
}
if (ret == null) ret = type.getType();
return ret;
}
public static ClassNode correctToGenericsSpec(Map genericsSpec, ClassNode type) {
if (type.isArray()) {
return correctToGenericsSpec(genericsSpec, type.getComponentType()).makeArray();
}
if (type.isGenericsPlaceHolder()) {
String name = type.getGenericsTypes()[0].getName();
type = genericsSpec.get(name);
}
if (type == null) type = ClassHelper.OBJECT_TYPE;
return type;
}
@SuppressWarnings("unchecked")
public static Map createGenericsSpec(ClassNode current) {
return createGenericsSpec(current, Collections.EMPTY_MAP);
}
public static Map createGenericsSpec(ClassNode current, Map oldSpec) {
Map ret = new HashMap(oldSpec);
// ret contains the type specs, what we now need is the type spec for the
// current class. To get that we first apply the type parameters to the
// current class and then use the type names of the current class to reset
// the map. Example:
// class A{}
// class B extends A {}
// first we have: T->Number
// we apply it to A -> A
// resulting in: V->Number,W->Long,X->String
GenericsType[] sgts = current.getGenericsTypes();
if (sgts != null) {
ClassNode[] spec = new ClassNode[sgts.length];
for (int i = 0; i < spec.length; i++) {
spec[i] = correctToGenericsSpec(ret, sgts[i]);
}
GenericsType[] newGts = current.redirect().getGenericsTypes();
if (newGts == null) return ret;
ret.clear();
for (int i = 0; i < spec.length; i++) {
ret.put(newGts[i].getName(), spec[i]);
}
}
return ret;
}
public static Map addMethodGenerics(MethodNode current, Map oldSpec) {
Map ret = new HashMap(oldSpec);
// ret starts with the original type specs, now add gts for the current method if any
GenericsType[] sgts = current.getGenericsTypes();
if (sgts != null) {
for (GenericsType sgt : sgts) {
String name = sgt.getName();
if (sgt.isPlaceholder()) {
ClassNode redirect;
if (sgt.getUpperBounds() != null) {
redirect = sgt.getUpperBounds()[0];
} else if (sgt.getLowerBound() != null) {
redirect = sgt.getLowerBound();
} else {
redirect = ClassHelper.OBJECT_TYPE;
}
ClassNode type = ClassHelper.makeWithoutCaching(name);
type.setGenericsPlaceHolder(true);
type.setRedirect(redirect);
ret.put(name, type);
} else {
ret.put(name, sgt.getType());
}
}
}
return ret;
}
public static void extractSuperClassGenerics(ClassNode type, ClassNode target, Map spec) {
// TODO: this method is very similar to StaticTypesCheckingSupport#extractGenericsConnections,
// but operates on ClassNodes instead of GenericsType
if (target == null || type == target) return;
if (type.isArray() && target.isArray()) {
extractSuperClassGenerics(type.getComponentType(), target.getComponentType(), spec);
} else if (type.isArray() && JAVA_LANG_OBJECT.equals(target.getName())) {
// Object is superclass of arrays but no generics involved
} else if (target.isGenericsPlaceHolder() || type.equals(target) || !implementsInterfaceOrIsSubclassOf(type, target)) {
// structural match route
if (target.isGenericsPlaceHolder()) {
spec.put(target.getGenericsTypes()[0].getName(), type);
} else {
extractSuperClassGenerics(type.getGenericsTypes(), target.getGenericsTypes(), spec);
}
} else {
// have first to find matching super class or interface
ClassNode superClass = getSuperClass(type, target);
if (superClass != null) {
ClassNode corrected = getCorrectedClassNode(type, superClass, false);
extractSuperClassGenerics(corrected, target, spec);
} else {
// if we reach here, we have an unhandled case
throw new GroovyBugError("The type " + type + " seems not to normally extend " + target + ". Sorry, I cannot handle this.");
}
}
}
public static ClassNode getSuperClass(ClassNode type, ClassNode target) {
ClassNode superClass = ClassHelper.getNextSuperClass(type, target);
if (superClass == null) {
if (ClassHelper.isPrimitiveType(type)) {
superClass = ClassHelper.getNextSuperClass(ClassHelper.getWrapper(type), target);
}
}
return superClass;
}
private static void extractSuperClassGenerics(GenericsType[] usage, GenericsType[] declaration, Map spec) {
// if declaration does not provide generics, there is no connection to make
if (usage == null || declaration == null || declaration.length == 0) return;
if (usage.length != declaration.length) return;
// both have generics
for (int i = 0; i < usage.length; i++) {
GenericsType ui = usage[i];
GenericsType di = declaration[i];
if (di.isPlaceholder()) {
spec.put(di.getName(), ui.getType());
} else if (di.isWildcard()) {
if (ui.isWildcard()) {
extractSuperClassGenerics(ui.getLowerBound(), di.getLowerBound(), spec);
extractSuperClassGenerics(ui.getUpperBounds(), di.getUpperBounds(), spec);
} else {
ClassNode cu = ui.getType();
extractSuperClassGenerics(cu, di.getLowerBound(), spec);
ClassNode[] upperBounds = di.getUpperBounds();
if (upperBounds != null) {
for (ClassNode cn : upperBounds) {
extractSuperClassGenerics(cu, cn, spec);
}
}
}
} else {
extractSuperClassGenerics(ui.getType(), di.getType(), spec);
}
}
}
private static void extractSuperClassGenerics(ClassNode[] usage, ClassNode[] declaration, Map spec) {
if (usage == null || declaration == null || declaration.length == 0) return;
// both have generics
for (int i = 0; i < usage.length; i++) {
ClassNode ui = usage[i];
ClassNode di = declaration[i];
if (di.isGenericsPlaceHolder()) {
spec.put(di.getGenericsTypes()[0].getName(), di);
} else if (di.isUsingGenerics()) {
extractSuperClassGenerics(ui.getGenericsTypes(), di.getGenericsTypes(), spec);
}
}
}
public static ClassNode[] parseClassNodesFromString(
final String option,
final SourceUnit sourceUnit,
final CompilationUnit compilationUnit,
final MethodNode mn,
final ASTNode usage) {
GroovyLexer lexer = new GroovyLexer(new StringReader("DummyNode<" + option + ">"));
final GroovyRecognizer rn = GroovyRecognizer.make(lexer);
try {
rn.classOrInterfaceType(true);
final AtomicReference ref = new AtomicReference();
AntlrParserPlugin plugin = new AntlrParserPlugin() {
@Override
public ModuleNode buildAST(final SourceUnit sourceUnit, final ClassLoader classLoader, final Reduction cst) throws ParserException {
ref.set(makeTypeWithArguments(rn.getAST()));
return null;
}
};
plugin.buildAST(null, null, null);
ClassNode parsedNode = ref.get();
// the returned node is DummyNode genericsSpec, GenericsType[] oldPlaceHolders) {
if (oldPlaceHolders == null || oldPlaceHolders.length == 0) return oldPlaceHolders;
if (genericsSpec.isEmpty()) return oldPlaceHolders;
GenericsType[] newTypes = new GenericsType[oldPlaceHolders.length];
for (int i = 0; i < oldPlaceHolders.length; i++) {
GenericsType old = oldPlaceHolders[i];
if (!old.isPlaceholder())
throw new GroovyBugError("Given generics type " + old + " must be a placeholder!");
ClassNode fromSpec = genericsSpec.get(old.getName());
if (fromSpec != null) {
if (fromSpec.isGenericsPlaceHolder()) {
ClassNode[] upper = new ClassNode[]{fromSpec.redirect()};
newTypes[i] = new GenericsType(fromSpec, upper, null);
} else {
newTypes[i] = new GenericsType(fromSpec);
}
} else {
ClassNode[] upper = old.getUpperBounds();
ClassNode[] newUpper = upper;
if (upper != null && upper.length > 0) {
ClassNode[] upperCorrected = new ClassNode[upper.length];
for (int j = 0; j < upper.length; j++) {
upperCorrected[i] = correctToGenericsSpecRecurse(genericsSpec, upper[j]);
}
upper = upperCorrected;
}
ClassNode lower = old.getLowerBound();
ClassNode newLower = correctToGenericsSpecRecurse(genericsSpec, lower);
if (lower == newLower && upper == newUpper) {
newTypes[i] = oldPlaceHolders[i];
} else {
ClassNode newPlaceHolder = ClassHelper.make(old.getName());
GenericsType gt = new GenericsType(newPlaceHolder, newUpper, newLower);
gt.setPlaceholder(true);
newTypes[i] = gt;
}
}
}
return newTypes;
}
private static final String TRUE_STR = "true";
private static final boolean PARAMETERIZED_TYPE_CACHE_ENABLED =
TRUE_STR.equals(SystemUtil.getSystemPropertySafe("groovy.enable.parameterized.type.cache", TRUE_STR));
/**
* Try to get the parameterized type from the cache.
* If no cached item found, cache and return the result of {@link #findParameterizedType(ClassNode, ClassNode)}
*/
public static ClassNode findParameterizedTypeFromCache(final ClassNode genericsClass, final ClassNode actualType) {
if (!PARAMETERIZED_TYPE_CACHE_ENABLED) {
return findParameterizedType(genericsClass, actualType);
}
SoftReference sr = PARAMETERIZED_TYPE_CACHE.getAndPut(new ParameterizedTypeCacheKey(genericsClass, actualType), new EvictableCache.ValueProvider>() {
@Override
public SoftReference provide(ParameterizedTypeCacheKey key) {
return new SoftReference<>(findParameterizedType(key.getGenericsClass(), key.getActualType()));
}
});
return null == sr ? null : sr.get();
}
/**
* Get the parameterized type by search the whole class hierarchy according to generics class and actual receiver.
* {@link #findParameterizedTypeFromCache(ClassNode, ClassNode)} is strongly recommended for better performance.
*
* @param genericsClass the generics class
* @param actualType the actual type
* @return the parameterized type
*/
public static ClassNode findParameterizedType(ClassNode genericsClass, ClassNode actualType) {
ClassNode parameterizedType = null;
if (null == genericsClass.getGenericsTypes()) {
return parameterizedType;
}
GenericsType[] declaringGenericsTypes = genericsClass.getGenericsTypes();
List classNodeList = new LinkedList<>(getAllSuperClassesAndInterfaces(actualType));
classNodeList.add(0, actualType);
for (ClassNode cn : classNodeList) {
if (cn == genericsClass) {
continue;
}
if (!genericsClass.equals(cn.redirect())) {
continue;
}
if (isGenericsTypeArraysLengthEqual(declaringGenericsTypes, cn.getGenericsTypes())) {
parameterizedType = cn;
break;
}
}
return parameterizedType;
}
private static boolean isGenericsTypeArraysLengthEqual(GenericsType[] declaringGenericsTypes, GenericsType[] actualGenericsTypes) {
return null != actualGenericsTypes && declaringGenericsTypes.length == actualGenericsTypes.length;
}
private static List getAllSuperClassesAndInterfaces(ClassNode actualReceiver) {
List superClassAndInterfaceList = new LinkedList<>();
List allSuperClassNodeList = getAllUnresolvedSuperClasses(actualReceiver);
superClassAndInterfaceList.addAll(allSuperClassNodeList);
superClassAndInterfaceList.addAll(actualReceiver.getAllInterfaces());
for (ClassNode superClassNode : allSuperClassNodeList) {
superClassAndInterfaceList.addAll(superClassNode.getAllInterfaces());
}
return superClassAndInterfaceList;
}
private static List getAllUnresolvedSuperClasses(ClassNode actualReceiver) {
List superClassNodeList = new LinkedList<>();
for (ClassNode cn = actualReceiver.getUnresolvedSuperClass(); null != cn && ClassHelper.OBJECT_TYPE != cn; cn = cn.getUnresolvedSuperClass()) {
superClassNodeList.add(cn);
}
return superClassNodeList;
}
private static final EvictableCache> PARAMETERIZED_TYPE_CACHE = new ConcurrentSoftCache<>(64);
/**
* Clear the parameterized type cache
* It is useful to IDE as the type being compiled are continuously being edited/altered, see GROOVY-8675
*/
public static void clearParameterizedTypeCache() {
PARAMETERIZED_TYPE_CACHE.clearAll();
}
/**
* map declaring generics type to actual generics type, e.g. GROOVY-7204:
* declaring generics types: T, S extends Serializable
* actual generics types : String, Long
*
* the result map is [
* T: String,
* S: Long
* ]
*
* The resolved types can not help us to choose methods correctly if the argument is a string: T: Object, S: Serializable
* so we need actual types: T: String, S: Long
*/
public static Map makeDeclaringAndActualGenericsTypeMap(ClassNode declaringClass, ClassNode actualReceiver) {
ClassNode parameterizedType = findParameterizedTypeFromCache(declaringClass, actualReceiver);
if (null == parameterizedType) {
return Collections.emptyMap();
}
GenericsType[] declaringGenericsTypes = declaringClass.getGenericsTypes();
GenericsType[] actualGenericsTypes = parameterizedType.getGenericsTypes();
Map result = new LinkedHashMap<>();
for (int i = 0, n = declaringGenericsTypes.length; i < n; i++) {
result.put(declaringGenericsTypes[i], actualGenericsTypes[i]);
}
return result;
}
/**
* Get the actual type according to the placeholder name
*
* @param placeholderName the placeholder name, e.g. T, E
* @param genericsPlaceholderAndTypeMap the result of {@link #makeDeclaringAndActualGenericsTypeMap(ClassNode, ClassNode)}
* @return the actual type
*/
public static ClassNode findActualTypeByGenericsPlaceholderName(String placeholderName, Map genericsPlaceholderAndTypeMap) {
for (Map.Entry entry : genericsPlaceholderAndTypeMap.entrySet()) {
GenericsType declaringGenericsType = entry.getKey();
if (placeholderName.equals(declaringGenericsType.getName())) {
return entry.getValue().getType().redirect();
}
}
return null;
}
private static class ParameterizedTypeCacheKey {
private ClassNode genericsClass;
private ClassNode actualType;
public ParameterizedTypeCacheKey(ClassNode genericsClass, ClassNode actualType) {
this.genericsClass = genericsClass;
this.actualType = actualType;
}
public ClassNode getGenericsClass() {
return genericsClass;
}
public void setGenericsClass(ClassNode genericsClass) {
this.genericsClass = genericsClass;
}
public ClassNode getActualType() {
return actualType;
}
public void setActualType(ClassNode actualType) {
this.actualType = actualType;
}
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
ParameterizedTypeCacheKey cacheKey = (ParameterizedTypeCacheKey) o;
return genericsClass == cacheKey.genericsClass &&
actualType == cacheKey.actualType;
}
@Override
public int hashCode() {
return Objects.hash(genericsClass, actualType);
}
}
}
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