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/*
* Copyright 2000-2014 JetBrains s.r.o.
*
* Licensed 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 com.intellij.psi.util;
import com.intellij.lang.ASTNode;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.Comparing;
import com.intellij.openapi.util.Condition;
import com.intellij.pom.java.LanguageLevel;
import com.intellij.psi.*;
import com.intellij.psi.tree.IElementType;
import gnu.trove.THashMap;
import org.jetbrains.annotations.NonNls;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.Map;
public class PsiTypesUtil {
@NonNls private static final Map<String, String> ourUnboxedTypes = new THashMap<String, String>();
@NonNls private static final Map<String, String> ourBoxedTypes = new THashMap<String, String>();
static {
ourUnboxedTypes.put(CommonClassNames.JAVA_LANG_BOOLEAN, "boolean");
ourUnboxedTypes.put(CommonClassNames.JAVA_LANG_BYTE, "byte");
ourUnboxedTypes.put(CommonClassNames.JAVA_LANG_SHORT, "short");
ourUnboxedTypes.put(CommonClassNames.JAVA_LANG_INTEGER, "int");
ourUnboxedTypes.put(CommonClassNames.JAVA_LANG_LONG, "long");
ourUnboxedTypes.put(CommonClassNames.JAVA_LANG_FLOAT, "float");
ourUnboxedTypes.put(CommonClassNames.JAVA_LANG_DOUBLE, "double");
ourUnboxedTypes.put(CommonClassNames.JAVA_LANG_CHARACTER, "char");
ourBoxedTypes.put("boolean", CommonClassNames.JAVA_LANG_BOOLEAN);
ourBoxedTypes.put("byte", CommonClassNames.JAVA_LANG_BYTE);
ourBoxedTypes.put("short", CommonClassNames.JAVA_LANG_SHORT);
ourBoxedTypes.put("int", CommonClassNames.JAVA_LANG_INTEGER);
ourBoxedTypes.put("long", CommonClassNames.JAVA_LANG_LONG);
ourBoxedTypes.put("float", CommonClassNames.JAVA_LANG_FLOAT);
ourBoxedTypes.put("double", CommonClassNames.JAVA_LANG_DOUBLE);
ourBoxedTypes.put("char", CommonClassNames.JAVA_LANG_CHARACTER);
}
@NonNls private static final String GET_CLASS_METHOD = "getClass";
private PsiTypesUtil() { }
public static String getDefaultValueOfType(PsiType type) {
if (type instanceof PsiArrayType) {
int count = type.getArrayDimensions() - 1;
PsiType componentType = type.getDeepComponentType();
if (componentType instanceof PsiClassType) {
final PsiClassType classType = (PsiClassType)componentType;
if (classType.resolve() instanceof PsiTypeParameter) {
return PsiKeyword.NULL;
}
}
StringBuilder buffer = new StringBuilder();
buffer.append(PsiKeyword.NEW);
buffer.append(" ");
buffer.append(componentType.getCanonicalText());
buffer.append("[0]");
for (int i = 0; i < count; i++) {
buffer.append("[]");
}
return buffer.toString();
}
else if (type instanceof PsiPrimitiveType) {
if (PsiType.BOOLEAN.equals(type)) {
return PsiKeyword.FALSE;
}
else {
return "0";
}
}
else {
return PsiKeyword.NULL;
}
}
/**
* Returns the unboxed type name or parameter.
* @param type boxed java type name
* @return unboxed type name if available; same value otherwise
*/
@Nullable
public static String unboxIfPossible(final String type) {
if (type == null) return null;
final String s = ourUnboxedTypes.get(type);
return s == null? type : s;
}
/**
* Returns the boxed type name or parameter.
* @param type primitive java type name
* @return boxed type name if available; same value otherwise
*/
@Nullable
public static String boxIfPossible(final String type) {
if (type == null) return null;
final String s = ourBoxedTypes.get(type);
return s == null ? type : s;
}
@Nullable
public static PsiClass getPsiClass(@Nullable PsiType psiType) {
return psiType instanceof PsiClassType? ((PsiClassType)psiType).resolve() : null;
}
public static PsiClassType getClassType(@NotNull PsiClass psiClass) {
return JavaPsiFacade.getElementFactory(psiClass.getProject()).createType(psiClass);
}
@Nullable
public static PsiClassType getLowestUpperBoundClassType(@NotNull final PsiDisjunctionType type) {
final PsiType lub = type.getLeastUpperBound();
if (lub instanceof PsiClassType) {
return (PsiClassType)lub;
}
else if (lub instanceof PsiIntersectionType) {
for (PsiType subType : ((PsiIntersectionType)lub).getConjuncts()) {
if (subType instanceof PsiClassType) {
final PsiClass aClass = ((PsiClassType)subType).resolve();
if (aClass != null && !aClass.isInterface()) {
return (PsiClassType)subType;
}
}
}
}
return null;
}
public static PsiType patchMethodGetClassReturnType(@NotNull PsiExpression call,
@NotNull PsiReferenceExpression methodExpression,
@NotNull PsiMethod method,
@Nullable Condition<IElementType> condition,
@NotNull LanguageLevel languageLevel) {
//JLS3 15.8.2
if (languageLevel.isAtLeast(LanguageLevel.JDK_1_5) && isGetClass(method)) {
PsiExpression qualifier = methodExpression.getQualifierExpression();
PsiType qualifierType = null;
final Project project = call.getProject();
if (qualifier != null) {
qualifierType = TypeConversionUtil.erasure(qualifier.getType());
}
else if (condition != null) {
ASTNode parent = call.getNode().getTreeParent();
while (parent != null && condition.value(parent.getElementType())) {
parent = parent.getTreeParent();
}
if (parent != null) {
qualifierType = JavaPsiFacade.getInstance(project).getElementFactory().createType((PsiClass)parent.getPsi());
}
}
PsiElement parent = call.getParent();
boolean captureTopLevelWildcards = parent instanceof PsiReferenceExpression && parent.getParent() instanceof PsiMethodCallExpression ||
parent instanceof PsiExpressionList;
return createJavaLangClassType(methodExpression, qualifierType, captureTopLevelWildcards);
}
return null;
}
public static boolean isGetClass(PsiMethod method) {
return GET_CLASS_METHOD.equals(method.getName()) && CommonClassNames.JAVA_LANG_OBJECT.equals(method.getContainingClass().getQualifiedName());
}
@Nullable
public static PsiType createJavaLangClassType(@NotNull PsiElement context, @Nullable PsiType qualifierType, boolean captureTopLevelWildcards) {
if (qualifierType != null) {
PsiUtil.ensureValidType(qualifierType);
JavaPsiFacade facade = JavaPsiFacade.getInstance(context.getProject());
PsiClass javaLangClass = facade.findClass(CommonClassNames.JAVA_LANG_CLASS, context.getResolveScope());
if (javaLangClass != null && javaLangClass.getTypeParameters().length == 1) {
PsiSubstitutor substitutor = PsiSubstitutor.EMPTY.
put(javaLangClass.getTypeParameters()[0], PsiWildcardType.createExtends(context.getManager(), qualifierType));
final PsiClassType classType = facade.getElementFactory().createType(javaLangClass, substitutor, PsiUtil.getLanguageLevel(context));
return captureTopLevelWildcards ? PsiUtil.captureToplevelWildcards(classType, context) : classType;
}
}
return null;
}
@Nullable
public static PsiType getExpectedTypeByParent(PsiExpression methodCall) {
final PsiElement parent = PsiUtil.skipParenthesizedExprUp(methodCall.getParent());
if (parent instanceof PsiVariable) {
if (PsiUtil.checkSameExpression(methodCall, ((PsiVariable)parent).getInitializer())) {
return ((PsiVariable)parent).getType();
}
}
else if (parent instanceof PsiAssignmentExpression) {
if (PsiUtil.checkSameExpression(methodCall, ((PsiAssignmentExpression)parent).getRExpression())) {
return ((PsiAssignmentExpression)parent).getLExpression().getType();
}
}
else if (parent instanceof PsiReturnStatement) {
final PsiLambdaExpression lambdaExpression = PsiTreeUtil.getParentOfType(parent, PsiLambdaExpression.class);
if (lambdaExpression != null) {
return null;
}
else {
PsiMethod method = PsiTreeUtil.getParentOfType(parent, PsiMethod.class);
if (method != null) {
return method.getReturnType();
}
}
}
else if (PsiUtil.isCondition(methodCall, parent)) {
return PsiType.BOOLEAN.getBoxedType(parent);
}
return null;
}
public static boolean compareTypes(PsiType leftType, PsiType rightType, boolean ignoreEllipsis) {
if (ignoreEllipsis) {
if (leftType instanceof PsiEllipsisType) {
leftType = ((PsiEllipsisType)leftType).toArrayType();
}
if (rightType instanceof PsiEllipsisType) {
rightType = ((PsiEllipsisType)rightType).toArrayType();
}
}
return Comparing.equal(leftType, rightType);
}
}
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