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comparison: xpcom/ds/nsHashPropertyBag.cpp

xpcom/ds/nsHashPropertyBag.cpp

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1 /* -*- Mode: C++; tab-width: 50; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 /* vim:set ts=4 sw=4 sts=4: */
3 /* This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6
7 #include "nsHashPropertyBag.h"
8 #include "nsArray.h"
9 #include "nsArrayEnumerator.h"
10 #include "nsIVariant.h"
11 #include "nsIProperty.h"
12 #include "nsVariant.h"
13 #include "mozilla/Attributes.h"
14
15 nsresult
16 NS_NewHashPropertyBag(nsIWritablePropertyBag* *_retval)
17 {
18 nsRefPtr<nsHashPropertyBag> hpb = new nsHashPropertyBag();
19 hpb.forget(_retval);
20 return NS_OK;
21 }
22
23 /*
24 * nsHashPropertyBag impl
25 */
26
27 NS_IMPL_ADDREF(nsHashPropertyBag)
28 NS_IMPL_RELEASE(nsHashPropertyBag)
29 NS_INTERFACE_MAP_BEGIN(nsHashPropertyBag)
30 NS_INTERFACE_MAP_ENTRY(nsIWritablePropertyBag)
31 NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsIPropertyBag, nsIWritablePropertyBag)
32 NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIWritablePropertyBag)
33 NS_INTERFACE_MAP_ENTRY(nsIPropertyBag2)
34 NS_INTERFACE_MAP_ENTRY(nsIWritablePropertyBag2)
35 NS_INTERFACE_MAP_END
36
37 NS_IMETHODIMP
38 nsHashPropertyBag::HasKey(const nsAString& name, bool *aResult)
39 {
40 *aResult = mPropertyHash.Get(name, nullptr);
41
42 return NS_OK;
43 }
44
45 NS_IMETHODIMP
46 nsHashPropertyBag::Get(const nsAString& name, nsIVariant* *_retval)
47 {
48 if (!mPropertyHash.Get(name, _retval))
49 *_retval = nullptr;
50
51 return NS_OK;
52 }
53
54 NS_IMETHODIMP
55 nsHashPropertyBag::GetProperty(const nsAString& name, nsIVariant* *_retval)
56 {
57 bool isFound = mPropertyHash.Get(name, _retval);
58 if (!isFound)
59 return NS_ERROR_FAILURE;
60
61 return NS_OK;
62 }
63
64 NS_IMETHODIMP
65 nsHashPropertyBag::SetProperty(const nsAString& name, nsIVariant *value)
66 {
67 if (NS_WARN_IF(!value))
68 return NS_ERROR_INVALID_ARG;
69
70 mPropertyHash.Put(name, value);
71
72 return NS_OK;
73 }
74
75 NS_IMETHODIMP
76 nsHashPropertyBag::DeleteProperty(const nsAString& name)
77 {
78 // is it too much to ask for ns*Hashtable to return
79 // a boolean indicating whether RemoveEntry succeeded
80 // or not?!?!
81 bool isFound = mPropertyHash.Get(name, nullptr);
82 if (!isFound)
83 return NS_ERROR_FAILURE;
84
85 // then from the hash
86 mPropertyHash.Remove(name);
87
88 return NS_OK;
89 }
90
91
92 //
93 // nsSimpleProperty class and impl; used for GetEnumerator
94 //
95
96 class nsSimpleProperty MOZ_FINAL : public nsIProperty {
97 public:
98 nsSimpleProperty(const nsAString& aName, nsIVariant* aValue)
99 : mName(aName), mValue(aValue)
100 {
101 }
102
103 NS_DECL_ISUPPORTS
104 NS_DECL_NSIPROPERTY
105 protected:
106 nsString mName;
107 nsCOMPtr<nsIVariant> mValue;
108 };
109
110 NS_IMPL_ISUPPORTS(nsSimpleProperty, nsIProperty)
111
112 NS_IMETHODIMP
113 nsSimpleProperty::GetName(nsAString& aName)
114 {
115 aName.Assign(mName);
116 return NS_OK;
117 }
118
119 NS_IMETHODIMP
120 nsSimpleProperty::GetValue(nsIVariant* *aValue)
121 {
122 NS_IF_ADDREF(*aValue = mValue);
123 return NS_OK;
124 }
125
126 // end nsSimpleProperty
127
128 static PLDHashOperator
129 PropertyHashToArrayFunc (const nsAString &aKey,
130 nsIVariant* aData,
131 void *userArg)
132 {
133 nsIMutableArray *propertyArray =
134 static_cast<nsIMutableArray *>(userArg);
135 nsSimpleProperty *sprop = new nsSimpleProperty(aKey, aData);
136 propertyArray->AppendElement(sprop, false);
137 return PL_DHASH_NEXT;
138 }
139
140
141 NS_IMETHODIMP
142 nsHashPropertyBag::GetEnumerator(nsISimpleEnumerator* *_retval)
143 {
144 nsCOMPtr<nsIMutableArray> propertyArray = nsArray::Create();
145 if (!propertyArray)
146 return NS_ERROR_OUT_OF_MEMORY;
147
148 mPropertyHash.EnumerateRead(PropertyHashToArrayFunc, propertyArray.get());
149
150 return NS_NewArrayEnumerator(_retval, propertyArray);
151 }
152
153 #define IMPL_GETSETPROPERTY_AS(Name, Type) \
154 NS_IMETHODIMP \
155 nsHashPropertyBag::GetPropertyAs ## Name (const nsAString & prop, Type *_retval) \
156 { \
157 nsIVariant* v = mPropertyHash.GetWeak(prop); \
158 if (!v) \
159 return NS_ERROR_NOT_AVAILABLE; \
160 return v->GetAs ## Name(_retval); \
161 } \
162 \
163 NS_IMETHODIMP \
164 nsHashPropertyBag::SetPropertyAs ## Name (const nsAString & prop, Type value) \
165 { \
166 nsCOMPtr<nsIWritableVariant> var = new nsVariant(); \
167 var->SetAs ## Name(value); \
168 return SetProperty(prop, var); \
169 }
170
171 IMPL_GETSETPROPERTY_AS(Int32, int32_t)
172 IMPL_GETSETPROPERTY_AS(Uint32, uint32_t)
173 IMPL_GETSETPROPERTY_AS(Int64, int64_t)
174 IMPL_GETSETPROPERTY_AS(Uint64, uint64_t)
175 IMPL_GETSETPROPERTY_AS(Double, double)
176 IMPL_GETSETPROPERTY_AS(Bool, bool)
177
178
179 NS_IMETHODIMP
180 nsHashPropertyBag::GetPropertyAsAString(const nsAString & prop, nsAString & _retval)
181 {
182 nsIVariant* v = mPropertyHash.GetWeak(prop);
183 if (!v)
184 return NS_ERROR_NOT_AVAILABLE;
185 return v->GetAsAString(_retval);
186 }
187
188 NS_IMETHODIMP
189 nsHashPropertyBag::GetPropertyAsACString(const nsAString & prop, nsACString & _retval)
190 {
191 nsIVariant* v = mPropertyHash.GetWeak(prop);
192 if (!v)
193 return NS_ERROR_NOT_AVAILABLE;
194 return v->GetAsACString(_retval);
195 }
196
197 NS_IMETHODIMP
198 nsHashPropertyBag::GetPropertyAsAUTF8String(const nsAString & prop, nsACString & _retval)
199 {
200 nsIVariant* v = mPropertyHash.GetWeak(prop);
201 if (!v)
202 return NS_ERROR_NOT_AVAILABLE;
203 return v->GetAsAUTF8String(_retval);
204 }
205
206 NS_IMETHODIMP
207 nsHashPropertyBag::GetPropertyAsInterface(const nsAString & prop,
208 const nsIID & aIID,
209 void** _retval)
210 {
211 nsIVariant* v = mPropertyHash.GetWeak(prop);
212 if (!v)
213 return NS_ERROR_NOT_AVAILABLE;
214 nsCOMPtr<nsISupports> val;
215 nsresult rv = v->GetAsISupports(getter_AddRefs(val));
216 if (NS_FAILED(rv))
217 return rv;
218 if (!val) {
219 // We have a value, but it's null
220 *_retval = nullptr;
221 return NS_OK;
222 }
223 return val->QueryInterface(aIID, _retval);
224 }
225
226 NS_IMETHODIMP
227 nsHashPropertyBag::SetPropertyAsAString(const nsAString & prop, const nsAString & value)
228 {
229 nsCOMPtr<nsIWritableVariant> var = new nsVariant();
230 var->SetAsAString(value);
231 return SetProperty(prop, var);
232 }
233
234 NS_IMETHODIMP
235 nsHashPropertyBag::SetPropertyAsACString(const nsAString & prop, const nsACString & value)
236 {
237 nsCOMPtr<nsIWritableVariant> var = new nsVariant();
238 var->SetAsACString(value);
239 return SetProperty(prop, var);
240 }
241
242 NS_IMETHODIMP
243 nsHashPropertyBag::SetPropertyAsAUTF8String(const nsAString & prop, const nsACString & value)
244 {
245 nsCOMPtr<nsIWritableVariant> var = new nsVariant();
246 var->SetAsAUTF8String(value);
247 return SetProperty(prop, var);
248 }
249
250 NS_IMETHODIMP
251 nsHashPropertyBag::SetPropertyAsInterface(const nsAString & prop, nsISupports* value)
252 {
253 nsCOMPtr<nsIWritableVariant> var = new nsVariant();
254 var->SetAsISupports(value);
255 return SetProperty(prop, var);
256 }
257

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