/**
* 根据传入参数创建CLASS文件
*
* @param 类名
* @param 保存路径
* @param 属性描述
* @return Class
*/
public Class build(String clsname, String savepath, Collection<Property> properties) {
Class cls = null;
try {
String classname = BuildUtil.transferClassName(clsname);
ClassWriter cw = new ClassWriter(0);
cw.visit(
V1_1,
ACC_PUBLIC,
classname,
null,
"edu/zju/cims201/GOF/hibernate/pojo/MetaKnowledge",
new String[] {"edu/zju/cims201/GOF/hibernate/pojo/Knowledge", "java/io/Serializable"});
// 建立构造函数
MethodVisitor mw = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null);
mw.visitVarInsn(ALOAD, 0);
mw.visitMethodInsn(
INVOKESPECIAL, "edu/zju/cims201/GOF/hibernate/pojo/MetaKnowledge", "<init>", "()V");
mw.visitInsn(RETURN);
mw.visitMaxs(1, 1);
mw.visitEnd();
BuildProperty property = null;
String propertytype = null;
String propertyname = null;
;
// 建立属性
Iterator iterator = properties.iterator();
while (iterator.hasNext()) {
// 建立属性对应的类变量
property = (BuildProperty) (iterator.next());
if (!property.getName().equals("knowledgetype")) {
propertytype = BuildUtil.transferClassName(property.getPropertyType());
propertyname = WordUtils.capitalize(property.getName());
cw.visitField(ACC_PRIVATE, property.getName(), "L" + propertytype + ";", null, null)
.visitEnd();
// 建立get方法
mw =
cw.visitMethod(
ACC_PUBLIC, "get" + propertyname, "()L" + propertytype + ";", null, null);
mw.visitCode();
mw.visitVarInsn(ALOAD, 0);
mw.visitFieldInsn(GETFIELD, classname, property.getName(), "L" + propertytype + ";");
mw.visitInsn(ARETURN);
mw.visitMaxs(1, 1);
mw.visitEnd();
// 建立set方法
mw =
cw.visitMethod(
ACC_PUBLIC, "set" + propertyname, "(L" + propertytype + ";)V", null, null);
mw.visitCode();
mw.visitVarInsn(ALOAD, 0);
mw.visitVarInsn(ALOAD, 1);
mw.visitFieldInsn(PUTFIELD, classname, property.getName(), "L" + propertytype + ";");
mw.visitMaxs(2, 2);
mw.visitInsn(RETURN);
mw.visitEnd();
}
}
cw.visitEnd();
byte[] code = cw.toByteArray();
if (savepath != null) {
Assistant.createNewFileFromWeb(savepath);
FileOutputStream fos = new FileOutputStream(savepath);
fos.write(code);
fos.close();
}
// web方式下出错，先注释掉
// cls = this.defineClass(clsname, code, 0, code.length);
return cls;
} catch (Throwable e) {
e.printStackTrace();
}
return cls;
}
