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
|
/*
* Copyright 2000-2009 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.refactoring.extractMethod;
import com.intellij.openapi.diagnostic.Logger;
import com.intellij.openapi.util.Key;
import com.intellij.psi.*;
import com.intellij.psi.search.SearchScope;
import com.intellij.psi.search.searches.ClassInheritorsSearch;
import com.intellij.psi.search.searches.ReferencesSearch;
import com.intellij.psi.util.PsiTreeUtil;
import com.intellij.psi.util.RedundantCastUtil;
import com.intellij.util.IncorrectOperationException;
import com.intellij.util.Processor;
import com.intellij.util.containers.HashMap;
import java.util.Map;
/**
* @author ven
*/
public class ExtractMethodUtil {
private static final Key<PsiMethod> RESOLVE_TARGET_KEY = Key.create("RESOLVE_TARGET_KEY");
private static final Logger LOG = Logger.getInstance("com.intellij.refactoring.extractMethod.ExtractMethodUtil");
private ExtractMethodUtil() { }
static Map<PsiMethodCallExpression, PsiMethod> encodeOverloadTargets(final PsiClass targetClass,
final SearchScope processConflictsScope,
final String overloadName,
final PsiElement extractedFragment) {
final Map<PsiMethodCallExpression, PsiMethod> ret = new HashMap<PsiMethodCallExpression, PsiMethod>();
encodeInClass(targetClass, overloadName, extractedFragment, ret);
ClassInheritorsSearch.search(targetClass, processConflictsScope, true).forEach(new Processor<PsiClass>() {
public boolean process(PsiClass inheritor) {
encodeInClass(inheritor, overloadName, extractedFragment, ret);
return true;
}
});
return ret;
}
private static void encodeInClass(final PsiClass aClass,
final String overloadName,
final PsiElement extractedFragment,
final Map<PsiMethodCallExpression, PsiMethod> ret) {
final PsiMethod[] overloads = aClass.findMethodsByName(overloadName, false);
for (final PsiMethod overload : overloads) {
for (final PsiReference ref : ReferencesSearch.search(overload)) {
final PsiElement element = ref.getElement();
final PsiElement parent = element.getParent();
if (parent instanceof PsiMethodCallExpression) {
final PsiMethodCallExpression call = (PsiMethodCallExpression)parent;
if (PsiTreeUtil.isAncestor(extractedFragment, element, false)) {
call.putCopyableUserData(RESOLVE_TARGET_KEY, overload);
} else {
//we assume element won't be invalidated as a result of extraction
ret.put(call, overload);
}
}
}
}
}
public static void decodeOverloadTargets(Map<PsiMethodCallExpression, PsiMethod> oldResolves, final PsiMethod extracted,
final PsiElement oldFragment) {
final PsiCodeBlock body = extracted.getBody();
assert body != null;
final JavaRecursiveElementVisitor visitor = new JavaRecursiveElementVisitor() {
@Override public void visitMethodCallExpression(PsiMethodCallExpression expression) {
super.visitMethodCallExpression(expression);
final PsiMethod target = expression.getCopyableUserData(RESOLVE_TARGET_KEY);
if (target != null) {
expression.putCopyableUserData(RESOLVE_TARGET_KEY, null);
try {
assertSameResolveTarget(target, expression, extracted);
}
catch (IncorrectOperationException e) {
LOG.error(e);
}
}
}
};
body.accept(visitor);
oldFragment.accept(visitor);
for (final Map.Entry<PsiMethodCallExpression, PsiMethod> entry : oldResolves.entrySet()) {
try {
assertSameResolveTarget(entry.getValue(), entry.getKey(), extracted);
}
catch (IncorrectOperationException e) {
LOG.error(e);
}
}
}
private static void assertSameResolveTarget(final PsiMethod oldTarget, final PsiMethodCallExpression call, final PsiMethod extracted)
throws IncorrectOperationException {
final PsiMethod newTarget = call.resolveMethod();
final PsiManager manager = extracted.getManager();
final PsiElementFactory factory = JavaPsiFacade.getInstance(manager.getProject()).getElementFactory();
if (!manager.areElementsEquivalent(oldTarget, newTarget)) {
final PsiParameter[] oldParameters = oldTarget.getParameterList().getParameters();
if (oldParameters.length > 0) {
final PsiMethodCallExpression copy = (PsiMethodCallExpression)call.copy();
final PsiExpression[] args = copy.getArgumentList().getExpressions();
for (int i = 0; i < args.length; i++) {
PsiExpression arg = args[i];
PsiType paramType = i < oldParameters.length ? oldParameters[i].getType() : oldParameters[oldParameters.length - 1].getType();
final PsiTypeCastExpression cast = (PsiTypeCastExpression)factory.createExpressionFromText("(a)b", null);
final PsiTypeElement typeElement = cast.getCastType();
assert typeElement != null;
typeElement.replace(factory.createTypeElement(paramType));
final PsiExpression operand = cast.getOperand();
assert operand != null;
operand.replace(arg);
arg.replace(cast);
}
for (int i = 0; i < copy.getArgumentList().getExpressions().length; i++) {
PsiExpression oldarg = call.getArgumentList().getExpressions()[i];
PsiTypeCastExpression cast = (PsiTypeCastExpression)copy.getArgumentList().getExpressions()[i];
if (!RedundantCastUtil.isCastRedundant(cast)) {
oldarg.replace(cast);
}
}
}
}
}
}
|
