com.firefly.utils.classproxy.FieldProxyFactoryUsingJavaCompiler Maven / Gradle / Ivy
package com.firefly.utils.classproxy;
import java.lang.reflect.Field;
import java.util.Map;
import java.util.UUID;
import com.firefly.utils.CompilerUtils;
import com.firefly.utils.ReflectUtils.FieldProxy;
import com.firefly.utils.collection.ConcurrentReferenceHashMap;
import com.firefly.utils.StringUtils;
public class FieldProxyFactoryUsingJavaCompiler extends AbstractFieldProxyFactory {
private static final Map fieldCache = new ConcurrentReferenceHashMap<>(256);
public static final FieldProxyFactoryUsingJavaCompiler INSTANCE = new FieldProxyFactoryUsingJavaCompiler();
private FieldProxyFactoryUsingJavaCompiler() {
}
@Override
public FieldProxy getFieldProxy(Field field) throws Throwable {
FieldProxy ret = fieldCache.get(field);
if(ret != null)
return ret;
synchronized(fieldCache) {
ret = fieldCache.get(field);
if(ret != null)
return ret;
ret = _getFieldProxy(field);
fieldCache.put(field, ret);
return ret;
}
}
private FieldProxy _getFieldProxy(Field field) throws Throwable {
String packageName = "com.firefly.utils";
String className = "FieldReflectionProxy" + UUID.randomUUID().toString().replace("-", "");
String completeClassName = packageName + "." + className;
String value = "";
Class fieldClazz = field.getType();
if(fieldClazz.isPrimitive()) {
value += StringUtils.replace("(({})value).{}Value()", primitiveWrapMap.get(fieldClazz), fieldClazz.getCanonicalName());
} else {
value += StringUtils.replace("({})value", fieldClazz.getCanonicalName());
}
String source = "package " + packageName + ";\n"
+ "import " + Field.class.getCanonicalName() + ";\n"
+"public class " + className + " implements " + FieldProxy.class.getCanonicalName() + " {\n"
+"private Field field;\n"
+"public " + className + "(Field field){\n"
+"\tthis.field = field;\n"
+"}\n\n"
+"public Field field(){return field;}\n"
+"public Object get(Object obj){\n"
+"\treturn " + StringUtils.replace("(({})obj).{};\n", field.getDeclaringClass().getCanonicalName(), field.getName())
+"}\n\n"
+"public void set(Object obj, Object value){\n"
+ StringUtils.replace("\t(({})obj).{} = ", field.getDeclaringClass().getCanonicalName(), field.getName())
+ value + ";\n"
+"}\n"
+"}";
// System.out.println(source);
Class fieldProxyClass = CompilerUtils.compileSource(completeClassName, source);
if(fieldProxyClass == null)
return null;
FieldProxy fieldProxy = (FieldProxy)fieldProxyClass.getConstructor(Field.class).newInstance(field);
return fieldProxy;
}
}