@Override
public FieldAccessor build(ClassLoader classLoader) {
String targetClassType = getInternalName(this.getTarget().getName());
ClassWriter classWriter = this.getClassWriter();
injectFieldTable(classWriter);
injectConstructor(classWriter);
injectGetTargetClass(classWriter, this.getTarget());
List<Field> fields = new ArrayList<>();
Class<?> current = this.getTarget();
while (current != Object.class) {
for (Field field : current.getDeclaredFields()) {
fields.add(field);
}
current = current.getSuperclass();
}
injectGetByIndex(classWriter, targetClassType, fields);
injectSetByIndex(classWriter, targetClassType, fields);
injectGetByName(classWriter);
injectSetByName(classWriter);
injectGetFieldTable(classWriter);
injectGetIndex(classWriter);
classWriter.visitEnd();
Class<?> result =
CompilerService.create(classLoader)
.defineClass(
getExternalName(
getAccessorNameInternal(
this.getTarget(),
this
.getAccessorType())), // this is somewhat redundant but maybe in the
// future the class-name-format changes
this.getClassWriter().toByteArray());
return (FieldAccessor) instantiate(result);
}
public static FieldAccess get(Class type) {
ArrayList<Field> fields = new ArrayList<Field>();
Class nextClass = type;
while (nextClass != Object.class) {
Field[] declaredFields = nextClass.getDeclaredFields();
fields.addAll(Arrays.asList(declaredFields));
nextClass = nextClass.getSuperclass();
}
String[] fieldNames = new String[fields.size()];
Class[] fieldTypes = new Class[fields.size()];
for (int i = 0, n = fieldNames.length; i < n; i++) {
fieldNames[i] = fields.get(i).getName();
fieldTypes[i] = fields.get(i).getType();
}
String className = type.getName();
String accessClassName = className + "FieldAccess";
if (accessClassName.startsWith("java.")) accessClassName = "reflectasm." + accessClassName;
Class accessClass = null;
AccessClassLoader loader = AccessClassLoader.get(type);
synchronized (loader) {
try {
accessClass = loader.loadClass(accessClassName);
} catch (ClassNotFoundException ignored) {
String accessClassNameInternal = accessClassName.replace('.', '/');
String classNameInternal = className.replace('.', '/');
ClassWriter cw = new ClassWriter(0);
cw.visit(
V1_1,
ACC_PUBLIC + ACC_SUPER,
accessClassNameInternal,
null,
"com/esotericsoftware/reflectasm/FieldAccess",
null);
insertConstructor(cw);
insertGetObject(cw, classNameInternal, fields);
insertSetObject(cw, classNameInternal, fields);
insertGetPrimitive(cw, classNameInternal, fields, Type.BOOLEAN_TYPE);
insertSetPrimitive(cw, classNameInternal, fields, Type.BOOLEAN_TYPE);
insertGetPrimitive(cw, classNameInternal, fields, Type.BYTE_TYPE);
insertSetPrimitive(cw, classNameInternal, fields, Type.BYTE_TYPE);
insertGetPrimitive(cw, classNameInternal, fields, Type.SHORT_TYPE);
insertSetPrimitive(cw, classNameInternal, fields, Type.SHORT_TYPE);
insertGetPrimitive(cw, classNameInternal, fields, Type.INT_TYPE);
insertSetPrimitive(cw, classNameInternal, fields, Type.INT_TYPE);
insertGetPrimitive(cw, classNameInternal, fields, Type.LONG_TYPE);
insertSetPrimitive(cw, classNameInternal, fields, Type.LONG_TYPE);
insertGetPrimitive(cw, classNameInternal, fields, Type.DOUBLE_TYPE);
insertSetPrimitive(cw, classNameInternal, fields, Type.DOUBLE_TYPE);
insertGetPrimitive(cw, classNameInternal, fields, Type.FLOAT_TYPE);
insertSetPrimitive(cw, classNameInternal, fields, Type.FLOAT_TYPE);
insertGetPrimitive(cw, classNameInternal, fields, Type.CHAR_TYPE);
insertSetPrimitive(cw, classNameInternal, fields, Type.CHAR_TYPE);
insertGetString(cw, classNameInternal, fields);
cw.visitEnd();
accessClass = loader.defineClass(accessClassName, cw.toByteArray());
}
}
try {
FieldAccess access = (FieldAccess) accessClass.newInstance();
access.fieldNames = fieldNames;
access.fieldTypes = fieldTypes;
return access;
} catch (Throwable t) {
throw new RuntimeException("Error constructing field access class: " + accessClassName, t);
}
}