package com.firefly.utils.classproxy;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.ConcurrentHashMap;
import com.firefly.utils.CompilerUtils;
import com.firefly.utils.ReflectUtils.ArrayProxy;
import com.firefly.utils.StringUtils;
public class ArrayProxyFactoryUsingJavaCompiler extends AbstractArrayProxyFactory {
private static final Map<Class<?>, ArrayProxy> arrayCache = new ConcurrentHashMap<Class<?>, ArrayProxy>();
public static final ArrayProxyFactoryUsingJavaCompiler INSTANCE = new ArrayProxyFactoryUsingJavaCompiler();
private ArrayProxyFactoryUsingJavaCompiler(){
}
@Override
public ArrayProxy getArrayProxy(Class<?> clazz) throws Throwable {
if(!clazz.isArray())
throw new IllegalArgumentException("type error, it's not array");
ArrayProxy ret = arrayCache.get(clazz);
if(ret != null)
return ret;
synchronized(arrayCache) {
ret = arrayCache.get(clazz);
if(ret != null)
return ret;
ret = _getArrayProxy(clazz);
arrayCache.put(clazz, ret);
return ret;
}
}
private ArrayProxy _getArrayProxy(Class<?> clazz) throws Throwable {
// long start = System.currentTimeMillis();
String packageName = "com.firefly.utils";
String className = "ArrayReflectionProxy" + UUID.randomUUID().toString().replace("-", "");
String completeClassName = packageName + "." + className;
// System.out.println(completeClassName);
Class<?> componentType = clazz.getComponentType();
String v = null;
if(componentType.isPrimitive()) {
v = StringUtils.replace("(({})value).{}Value()", primitiveWrapMap.get(componentType), componentType.getCanonicalName());
} else {
v = "(" + clazz.getComponentType().getCanonicalName() + ")value;\n";
}
String source = "package " + packageName + ";\n"
+"public class " + className + " implements " + ArrayProxy.class.getCanonicalName() + " {\n"
+"@Override\n"
+"public int size(Object array){\n"
+"\treturn ((" + clazz.getCanonicalName() + ")array).length;\n"
+"}\n\n"
+"@Override\n"
+"public Object get(Object array, int index){\n"
+"\treturn ((" + clazz.getCanonicalName() + ")array)[index];\n"
+"}\n\n"
+"@Override\n"
+"public void set(Object array, int index, Object value){\n"
+"\t((" + clazz.getCanonicalName() + ")array)[index] = " + v + ";"
+"}\n\n"
+"}";
// System.out.println(source);
Class<?> arrayProxyClazz = CompilerUtils.compileSource(completeClassName, source);
if(arrayProxyClazz == null)
return null;
ArrayProxy obj = (ArrayProxy)arrayProxyClazz.newInstance();
// long end = System.currentTimeMillis();
// System.out.println("Java compiler generates class proxy time -> " + (end - start));
return obj;
}
}