1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
/*
* Copyright 2003-2014 Dave Griffith, Bas Leijdekkers
*
* 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.siyeh.ig.psiutils;
import com.intellij.psi.*;
import com.intellij.psi.util.PsiTreeUtil;
import com.intellij.psi.util.TypeConversionUtil;
import org.jetbrains.annotations.Contract;
import org.jetbrains.annotations.NonNls;
import org.jetbrains.annotations.Nullable;
import java.util.HashSet;
import java.util.Set;
public class ClassUtils {
/**
* @noinspection StaticCollection
*/
private static final Set<String> immutableTypes = new HashSet<String>(19);
/**
* @noinspection StaticCollection
*/
private static final Set<PsiType> primitiveNumericTypes = new HashSet<PsiType>(7);
/**
* @noinspection StaticCollection
*/
private static final Set<PsiType> integralTypes = new HashSet<PsiType>(5);
static {
integralTypes.add(PsiType.LONG);
integralTypes.add(PsiType.INT);
integralTypes.add(PsiType.SHORT);
integralTypes.add(PsiType.CHAR);
integralTypes.add(PsiType.BYTE);
primitiveNumericTypes.add(PsiType.BYTE);
primitiveNumericTypes.add(PsiType.CHAR);
primitiveNumericTypes.add(PsiType.SHORT);
primitiveNumericTypes.add(PsiType.INT);
primitiveNumericTypes.add(PsiType.LONG);
primitiveNumericTypes.add(PsiType.FLOAT);
primitiveNumericTypes.add(PsiType.DOUBLE);
immutableTypes.add(CommonClassNames.JAVA_LANG_BOOLEAN);
immutableTypes.add(CommonClassNames.JAVA_LANG_CHARACTER);
immutableTypes.add(CommonClassNames.JAVA_LANG_SHORT);
immutableTypes.add(CommonClassNames.JAVA_LANG_INTEGER);
immutableTypes.add(CommonClassNames.JAVA_LANG_LONG);
immutableTypes.add(CommonClassNames.JAVA_LANG_FLOAT);
immutableTypes.add(CommonClassNames.JAVA_LANG_DOUBLE);
immutableTypes.add(CommonClassNames.JAVA_LANG_BYTE);
immutableTypes.add(CommonClassNames.JAVA_LANG_STRING);
immutableTypes.add("java.awt.Font");
immutableTypes.add("java.awt.Color");
immutableTypes.add("java.math.BigDecimal");
immutableTypes.add("java.math.BigInteger");
immutableTypes.add("java.math.MathContext");
immutableTypes.add("java.nio.channels.FileLock");
immutableTypes.add("java.nio.charset.Charset");
immutableTypes.add("java.io.File");
immutableTypes.add("java.net.URI");
immutableTypes.add("java.util.regex.Pattern");
}
private ClassUtils() {}
@Nullable
public static PsiClass findClass(@NonNls String fqClassName, PsiElement context) {
return JavaPsiFacade.getInstance(context.getProject()).findClass(fqClassName, context.getResolveScope());
}
@Nullable
public static PsiClass findObjectClass(PsiElement context) {
return findClass(CommonClassNames.JAVA_LANG_OBJECT, context);
}
public static boolean isPrimitive(PsiType type) {
return TypeConversionUtil.isPrimitiveAndNotNull(type);
}
public static boolean isIntegral(PsiType type) {
return integralTypes.contains(type);
}
public static boolean isImmutable(PsiType type) {
if (TypeConversionUtil.isPrimitiveAndNotNull(type)) {
return true;
}
if (!(type instanceof PsiClassType)) {
return false;
}
final PsiClassType classType = (PsiClassType)type;
final String className = classType.getCanonicalText();
return immutableTypes.contains(className);
}
public static boolean inSamePackage(@Nullable PsiElement element1,
@Nullable PsiElement element2) {
if (element1 == null || element2 == null) {
return false;
}
final PsiFile containingFile1 = element1.getContainingFile();
if (!(containingFile1 instanceof PsiClassOwner)) {
return false;
}
final PsiClassOwner containingJavaFile1 =
(PsiClassOwner)containingFile1;
final String packageName1 = containingJavaFile1.getPackageName();
final PsiFile containingFile2 = element2.getContainingFile();
if (!(containingFile2 instanceof PsiClassOwner)) {
return false;
}
final PsiClassOwner containingJavaFile2 =
(PsiClassOwner)containingFile2;
final String packageName2 = containingJavaFile2.getPackageName();
return packageName1.equals(packageName2);
}
public static boolean isFieldVisible(PsiField field, PsiClass fromClass) {
final PsiClass fieldClass = field.getContainingClass();
if (fieldClass == null) {
return false;
}
if (fieldClass.equals(fromClass)) {
return true;
}
if (field.hasModifierProperty(PsiModifier.PRIVATE)) {
return false;
}
if (field.hasModifierProperty(PsiModifier.PUBLIC) ||
field.hasModifierProperty(PsiModifier.PROTECTED)) {
return true;
}
return inSamePackage(fieldClass, fromClass);
}
@Contract("null -> false")
public static boolean isPrimitiveNumericType(@Nullable PsiType type) {
return primitiveNumericTypes.contains(type);
}
public static boolean isInnerClass(PsiClass aClass) {
final PsiClass parentClass = getContainingClass(aClass);
return parentClass != null;
}
@Nullable
public static PsiClass getContainingClass(PsiElement element) {
return PsiTreeUtil.getParentOfType(element, PsiClass.class);
}
public static PsiClass getOutermostContainingClass(PsiClass aClass) {
PsiClass outerClass = aClass;
while (true) {
final PsiClass containingClass = getContainingClass(outerClass);
if (containingClass != null) {
outerClass = containingClass;
}
else {
return outerClass;
}
}
}
@Nullable
public static PsiClass getContainingStaticClass(PsiElement element) {
PsiClass aClass = PsiTreeUtil.getParentOfType(element, PsiClass.class, false, PsiFile.class);
while (isNonStaticClass(aClass)) {
aClass = PsiTreeUtil.getParentOfType(aClass, PsiClass.class, true, PsiFile.class);
}
return aClass;
}
public static boolean isNonStaticClass(@Nullable PsiClass aClass) {
if (aClass == null) {
return false;
}
if (aClass.hasModifierProperty(PsiModifier.STATIC) || aClass.isInterface() || aClass.isEnum()) {
return false;
}
if (aClass instanceof PsiAnonymousClass) {
return true;
}
final PsiElement parent = aClass.getParent();
if (parent == null || parent instanceof PsiFile) {
return false;
}
if (!(parent instanceof PsiClass)) {
return true;
}
final PsiClass parentClass = (PsiClass)parent;
return !parentClass.isInterface();
}
}
|
