101 /**
102 * Returns the platform class loader.
103 */
104 public static ClassLoader platformClassLoader() {
105 return PLATFORM_LOADER;
106 }
107
108 /**
109 * Returns the application class loader.
110 */
111 public static ClassLoader appClassLoader() {
112 return APP_LOADER;
113 }
114
115 /**
116 * The class loader that is used to find resources in modules defined to
117 * the boot class loader. It is not used for class loading.
118 */
119 private static class BootClassLoader extends BuiltinClassLoader {
120 BootClassLoader(URLClassPath bcp) {
121 super(null, bcp);
122 }
123
124 @Override
125 protected Class<?> loadClassOrNull(String cn) {
126 return JLA.findBootstrapClassOrNull(this, cn);
127 }
128 };
129
130 /**
131 * The platform class loader, a unique type to make it easier to distinguish
132 * from the application class loader.
133 */
134 private static class PlatformClassLoader extends BuiltinClassLoader {
135 static {
136 if (!ClassLoader.registerAsParallelCapable())
137 throw new InternalError();
138 }
139
140 PlatformClassLoader(BootClassLoader parent) {
141 super(parent, null);
142 }
143
144 /**
145 * Called by the VM to support define package for AppCDS.
146 *
147 * Shared classes are returned in ClassLoader::findLoadedClass
148 * that bypass the defineClass call.
149 */
150 private Package definePackage(String pn, Module module) {
151 return JLA.definePackage(this, pn, module);
152 }
153 }
154
155 /**
156 * The application class loader that is a {@code BuiltinClassLoader} with
157 * customizations to be compatible with long standing behavior.
158 */
159 private static class AppClassLoader extends BuiltinClassLoader {
160 static {
161 if (!ClassLoader.registerAsParallelCapable())
162 throw new InternalError();
163 }
164
165 final URLClassPath ucp;
166
167 AppClassLoader(PlatformClassLoader parent, URLClassPath ucp) {
168 super(parent, ucp);
169 this.ucp = ucp;
170 }
171
172 @Override
173 protected Class<?> loadClass(String cn, boolean resolve)
174 throws ClassNotFoundException
175 {
176 // for compatibility reasons, say where restricted package list has
177 // been updated to list API packages in the unnamed module.
178 SecurityManager sm = System.getSecurityManager();
179 if (sm != null) {
180 int i = cn.lastIndexOf('.');
181 if (i != -1) {
182 sm.checkPackageAccess(cn.substring(0, i));
183 }
184 }
185
186 return super.loadClass(cn, resolve);
187 }
188
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101 /**
102 * Returns the platform class loader.
103 */
104 public static ClassLoader platformClassLoader() {
105 return PLATFORM_LOADER;
106 }
107
108 /**
109 * Returns the application class loader.
110 */
111 public static ClassLoader appClassLoader() {
112 return APP_LOADER;
113 }
114
115 /**
116 * The class loader that is used to find resources in modules defined to
117 * the boot class loader. It is not used for class loading.
118 */
119 private static class BootClassLoader extends BuiltinClassLoader {
120 BootClassLoader(URLClassPath bcp) {
121 super(null, null, bcp);
122 }
123
124 @Override
125 protected Class<?> loadClassOrNull(String cn) {
126 return JLA.findBootstrapClassOrNull(this, cn);
127 }
128 };
129
130 /**
131 * The platform class loader, a unique type to make it easier to distinguish
132 * from the application class loader.
133 */
134 private static class PlatformClassLoader extends BuiltinClassLoader {
135 static {
136 if (!ClassLoader.registerAsParallelCapable())
137 throw new InternalError();
138 }
139
140 PlatformClassLoader(BootClassLoader parent) {
141 super("platform", parent, null);
142 }
143
144 /**
145 * Called by the VM to support define package for AppCDS.
146 *
147 * Shared classes are returned in ClassLoader::findLoadedClass
148 * that bypass the defineClass call.
149 */
150 private Package definePackage(String pn, Module module) {
151 return JLA.definePackage(this, pn, module);
152 }
153 }
154
155 /**
156 * The application class loader that is a {@code BuiltinClassLoader} with
157 * customizations to be compatible with long standing behavior.
158 */
159 private static class AppClassLoader extends BuiltinClassLoader {
160 static {
161 if (!ClassLoader.registerAsParallelCapable())
162 throw new InternalError();
163 }
164
165 final URLClassPath ucp;
166
167 AppClassLoader(PlatformClassLoader parent, URLClassPath ucp) {
168 super("app", parent, ucp);
169 this.ucp = ucp;
170 }
171
172 @Override
173 protected Class<?> loadClass(String cn, boolean resolve)
174 throws ClassNotFoundException
175 {
176 // for compatibility reasons, say where restricted package list has
177 // been updated to list API packages in the unnamed module.
178 SecurityManager sm = System.getSecurityManager();
179 if (sm != null) {
180 int i = cn.lastIndexOf('.');
181 if (i != -1) {
182 sm.checkPackageAccess(cn.substring(0, i));
183 }
184 }
185
186 return super.loadClass(cn, resolve);
187 }
188
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