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
|
/*
* Copyright (C) 2010-2021 The Project Lombok Authors.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package lombok.javac.handlers;
import static lombok.core.handlers.HandlerUtil.handleFlagUsage;
import static lombok.javac.handlers.HandleDelegate.HANDLE_DELEGATE_PRIORITY;
import static lombok.javac.handlers.JavacHandlerUtil.*;
import lombok.ConfigurationKeys;
import lombok.val;
import lombok.core.HandlerPriority;
import lombok.var;
import lombok.javac.JavacASTAdapter;
import lombok.javac.JavacASTVisitor;
import lombok.javac.JavacNode;
import lombok.javac.JavacResolution;
import lombok.javac.ResolutionResetNeeded;
import lombok.spi.Provides;
import com.sun.tools.javac.code.Flags;
import com.sun.tools.javac.code.Symtab;
import com.sun.tools.javac.code.Type;
import com.sun.tools.javac.tree.JCTree;
import com.sun.tools.javac.tree.JCTree.JCAnnotation;
import com.sun.tools.javac.tree.JCTree.JCEnhancedForLoop;
import com.sun.tools.javac.tree.JCTree.JCExpression;
import com.sun.tools.javac.tree.JCTree.JCForLoop;
import com.sun.tools.javac.tree.JCTree.JCLiteral;
import com.sun.tools.javac.tree.JCTree.JCNewArray;
import com.sun.tools.javac.tree.JCTree.JCVariableDecl;
import com.sun.tools.javac.util.List;
@Provides(JavacASTVisitor.class)
@HandlerPriority(HANDLE_DELEGATE_PRIORITY + 100) // run slightly after HandleDelegate; resolution needs to work, so if the RHS expression is i.e. a call to a generated getter, we have to run after that getter has been generated.
@ResolutionResetNeeded
public class HandleVal extends JavacASTAdapter {
private static boolean eq(String typeTreeToString, String key) {
return typeTreeToString.equals(key) || typeTreeToString.equals("lombok." + key) || typeTreeToString.equals("lombok.experimental." + key);
}
@SuppressWarnings("deprecation") @Override
public void endVisitLocal(JavacNode localNode, JCVariableDecl local) {
JCTree typeTree = local.vartype;
if (typeTree == null) return;
String typeTreeToString = typeTree.toString();
JavacNode typeNode = localNode.getNodeFor(typeTree);
if (!(eq(typeTreeToString, "val") || eq(typeTreeToString, "var"))) return;
boolean isVal = typeMatches(val.class, localNode, typeTree);
boolean isVar = typeMatches(var.class, localNode, typeTree);
if (!(isVal || isVar)) return;
if (isVal) handleFlagUsage(localNode, ConfigurationKeys.VAL_FLAG_USAGE, "val");
if (isVar) handleFlagUsage(localNode, ConfigurationKeys.VAR_FLAG_USAGE, "var");
JCTree parentRaw = localNode.directUp().get();
if (isVal && parentRaw instanceof JCForLoop) {
localNode.addError("'val' is not allowed in old-style for loops");
return;
}
if (parentRaw instanceof JCForLoop && ((JCForLoop) parentRaw).getInitializer().size() > 1) {
localNode.addError("'var' is not allowed in old-style for loops if there is more than 1 initializer");
return;
}
JCExpression rhsOfEnhancedForLoop = null;
if (local.init == null) {
if (parentRaw instanceof JCEnhancedForLoop) {
JCEnhancedForLoop efl = (JCEnhancedForLoop) parentRaw;
if (efl.var == local) rhsOfEnhancedForLoop = efl.expr;
}
}
final String annotation = typeTreeToString;
if (rhsOfEnhancedForLoop == null && local.init == null) {
localNode.addError("'" + annotation + "' on a local variable requires an initializer expression");
return;
}
if (local.init instanceof JCNewArray && ((JCNewArray)local.init).elemtype == null) {
localNode.addError("'" + annotation + "' is not compatible with array initializer expressions. Use the full form (new int[] { ... } instead of just { ... })");
return;
}
if (localNode.shouldDeleteLombokAnnotations()) {
JavacHandlerUtil.deleteImportFromCompilationUnit(localNode, val.class.getName());
JavacHandlerUtil.deleteImportFromCompilationUnit(localNode, lombok.experimental.var.class.getName());
JavacHandlerUtil.deleteImportFromCompilationUnit(localNode, var.class.getName());
}
if (isVal) local.mods.flags |= Flags.FINAL;
if (!localNode.shouldDeleteLombokAnnotations()) {
JCAnnotation valAnnotation = recursiveSetGeneratedBy(localNode.getTreeMaker().Annotation(local.vartype, List.<JCExpression>nil()), typeNode);
local.mods.annotations = local.mods.annotations == null ? List.of(valAnnotation) : local.mods.annotations.append(valAnnotation);
}
if (localNode.getSourceVersion() >= 10) {
local.vartype = null;
localNode.getAst().setChanged();
return;
}
if (JavacResolution.platformHasTargetTyping()) {
local.vartype = localNode.getAst().getTreeMaker().Ident(localNode.getAst().toName("___Lombok_VAL_Attrib__"));
} else {
local.vartype = JavacResolution.createJavaLangObject(localNode.getAst());
}
Type type;
try {
if (rhsOfEnhancedForLoop == null) {
if (local.init.type == null) {
if (isVar && local.init instanceof JCLiteral && ((JCLiteral) local.init).value == null) {
localNode.addError("variable initializer is 'null'");
}
JavacResolution resolver = new JavacResolution(localNode.getContext());
try {
type = ((JCExpression) resolver.resolveMethodMember(localNode).get(local.init)).type;
} catch (RuntimeException e) {
System.err.println("Exception while resolving: " + localNode + "(" + localNode.getFileName() + ")");
throw e;
}
} else {
type = local.init.type;
if (type.isErroneous()) {
try {
JavacResolution resolver = new JavacResolution(localNode.getContext());
local.type = Symtab.instance(localNode.getContext()).unknownType;
type = ((JCExpression) resolver.resolveMethodMember(localNode).get(local.init)).type;
} catch (RuntimeException e) {
System.err.println("Exception while resolving: " + localNode + "(" + localNode.getFileName() + ")");
throw e;
}
}
}
} else {
if (rhsOfEnhancedForLoop.type == null) {
JavacResolution resolver = new JavacResolution(localNode.getContext());
type = ((JCExpression) resolver.resolveMethodMember(localNode.directUp()).get(rhsOfEnhancedForLoop)).type;
} else {
type = rhsOfEnhancedForLoop.type;
}
}
try {
JCExpression replacement;
if (rhsOfEnhancedForLoop != null) {
Type componentType = JavacResolution.ifTypeIsIterableToComponent(type, localNode.getAst());
if (componentType == null) replacement = JavacResolution.createJavaLangObject(localNode.getAst());
else replacement = JavacResolution.typeToJCTree(componentType, localNode.getAst(), false);
} else {
replacement = JavacResolution.typeToJCTree(type, localNode.getAst(), false);
}
if (replacement != null) {
local.vartype = replacement;
} else {
local.vartype = JavacResolution.createJavaLangObject(localNode.getAst());
}
localNode.getAst().setChanged();
} catch (JavacResolution.TypeNotConvertibleException e) {
localNode.addError("Cannot use '" + annotation + "' here because initializer expression does not have a representable type: " + e.getMessage());
local.vartype = JavacResolution.createJavaLangObject(localNode.getAst());
}
} catch (RuntimeException e) {
local.vartype = JavacResolution.createJavaLangObject(localNode.getAst());
throw e;
} finally {
recursiveSetGeneratedBy(local.vartype, typeNode);
}
}
}
|
