lxy/redkale
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Browse Source
This commit is contained in:
wentch
2015-12-24 16:57:16 +08:00
parent 3d0e025516
commit cf14b030bf
1 changed files with 64 additions and 18 deletions
Download Patch File Download Diff File Expand all files Collapse all files

82
src/org/redkale/util/Creator.java
View File

@@ -62,7 +62,7 @@ import static jdk.internal.org.objectweb.asm.Opcodes.*;
public interface Creator<T> {
@Documented
@Target({CONSTRUCTOR, TYPE})
@Target({METHOD})
@Retention(RUNTIME)
public static @interface ConstructorParameters {
@@ -72,7 +72,7 @@ public interface Creator<T> {
public T create(Object... params);
@SuppressWarnings("unchecked")
public static <T> Creator<T> create(Class<T> clazz) {
public static <T> Creator<T> create(Class<T> clazz) {
if (clazz.isAssignableFrom(ArrayList.class)) {
clazz = (Class<T>) ArrayList.class;
} else if (clazz.isAssignableFrom(HashMap.class)) {
@@ -115,17 +115,17 @@ public interface Creator<T> {
}
}
if (constructor == null) {
for (Constructor c : clazz.getDeclaredConstructors()) {
if (Modifier.isPrivate(c.getModifiers())) continue;
if (c.getAnnotation(ConstructorProperties.class) != null || c.getAnnotation(ConstructorParameters.class) != null) {
for (Constructor c : clazz.getConstructors()) {
//if (Modifier.isPrivate(c.getModifiers())) continue;
if (c.getAnnotation(ConstructorProperties.class) != null) {
constructor = c;
break;
}
}
}
if (constructor == null) throw new RuntimeException("[" + clazz + "] have no public or java.beans.ConstructorProperties-Annotation or ConstructorParameters-Annotation constructor.");
if (constructor == null) throw new RuntimeException("[" + clazz + "] have no public or java.beans.ConstructorProperties-Annotation constructor.");
//-------------------------------------------------------------
ClassWriter cw = new ClassWriter(0);
ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES);
FieldVisitor fv;
MethodVisitor mv;
AnnotationVisitor av0;
@@ -142,8 +142,7 @@ public interface Creator<T> {
{//create 方法
mv = cw.visitMethod(ACC_PUBLIC + ACC_VARARGS, "create", "([Ljava/lang/Object;)L" + interName + ";", null, null);
ConstructorProperties cps = constructor.getAnnotation(ConstructorProperties.class);
ConstructorParameters cts = constructor.getAnnotation(ConstructorParameters.class);
final String[] cparams = cps == null ? (cts == null ? null : cts.value()) : cps.value();
final String[] cparams = cps == null ? null : cps.value();
if (cparams != null) {
av0 = mv.visitAnnotation(Type.getDescriptor(ConstructorParameters.class), true);
AnnotationVisitor av1 = av0.visitArray("value");
@@ -153,13 +152,12 @@ public interface Creator<T> {
av1.visitEnd();
av0.visitEnd();
}
mv.visitTypeInsn(NEW, interName);
mv.visitInsn(DUP);
//---------------------------------------
Class[] params = constructor.getParameterTypes();
{
final int[] iconsts = {ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5};
for (int i = 0; i < params.length; i++) {
final Class[] paramTypes = constructor.getParameterTypes();
final int[] iconsts = {ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5};
{ //有Primitive数据类型且值为null的参数需要赋默认值
for (int i = 0; i < paramTypes.length; i++) {
final Class pt = paramTypes[i];
if (!pt.isPrimitive()) continue;
mv.visitVarInsn(ALOAD, 1);
if (i < 6) {
mv.visitInsn(iconsts[i]);
@@ -167,7 +165,55 @@ public interface Creator<T> {
mv.visitIntInsn(BIPUSH, i);
}
mv.visitInsn(AALOAD);
final Class ct = params[i];
Label lab = new Label();
mv.visitJumpInsn(IFNONNULL, lab);
mv.visitVarInsn(ALOAD, 1);
if (i < 6) {
mv.visitInsn(iconsts[i]);
} else {
mv.visitIntInsn(BIPUSH, i);
}
if (pt == int.class) {
mv.visitInsn(ICONST_0);
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Integer", "valueOf", "(I)Ljava/lang/Integer;", false);
} else if (pt == long.class) {
mv.visitInsn(LCONST_0);
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Long", "valueOf", "(J)Ljava/lang/Long;", false);
} else if (pt == boolean.class) {
mv.visitFieldInsn(GETSTATIC, "java/lang/Boolean", "FALSE", "Ljava/lang/Boolean;");
} else if (pt == short.class) {
mv.visitInsn(ICONST_0);
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Short", "valueOf", "(S)Ljava/lang/Short;", false);
} else if (pt == float.class) {
mv.visitInsn(FCONST_0);
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Float", "valueOf", "(F)Ljava/lang/Float;", false);
} else if (pt == byte.class) {
mv.visitInsn(ICONST_0);
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Byte", "valueOf", "(B)Ljava/lang/Byte;", false);
} else if (pt == double.class) {
mv.visitInsn(DCONST_0);
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Double", "valueOf", "(D)Ljava/lang/Double;", false);
} else if (pt == char.class) {
mv.visitInsn(ICONST_0);
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Character", "valueOf", "(C)Ljava/lang/Character;", false);
}
mv.visitInsn(AASTORE);
mv.visitLabel(lab);
}
}
mv.visitTypeInsn(NEW, interName);
mv.visitInsn(DUP);
//---------------------------------------
{
for (int i = 0; i < paramTypes.length; i++) {
mv.visitVarInsn(ALOAD, 1);
if (i < 6) {
mv.visitInsn(iconsts[i]);
} else {
mv.visitIntInsn(BIPUSH, i);
}
mv.visitInsn(AALOAD);
final Class ct = paramTypes[i];
if (ct.isPrimitive()) {
final Class bigct = Array.get(Array.newInstance(ct, 1), 0).getClass();
mv.visitTypeInsn(CHECKCAST, bigct.getName().replace('.', '/'));
@@ -185,7 +231,7 @@ public interface Creator<T> {
//---------------------------------------
mv.visitMethodInsn(INVOKESPECIAL, interName, "<init>", Type.getConstructorDescriptor(constructor), false);
mv.visitInsn(ARETURN);
mv.visitMaxs((params.length > 0 ? (params.length + 3) : 2), 2);
mv.visitMaxs((paramTypes.length > 0 ? (paramTypes.length + 3) : 2), 2);
mv.visitEnd();
}
{ //虚拟 create 方法