/**
* 将函数对象放入语句栈中，提供给LineFunction与BlockFunction使用。
*
* @see com.ruixus.smarty4j.statement.LineFunction
* @see com.ruixus.smarty4j.statement.BlockFunction
* @param mv ASM方法操作者
* @param local ASM语句栈的局部变量起始位置
* @param index 函数在Template中保存的位置
*/
protected String parseNode(MethodVisitorProxy mv, int local, int index) {
String name = this.getClass().getName().replace('.', '/');
mv.visitVarInsn(ALOAD, TEMPLATE);
mv.visitLdcInsn(index);
mv.visitMethodInsn(INVOKEVIRTUAL, Template.NAME, "getNode", "(I)Ljava/lang/Object;");
mv.visitTypeInsn(CHECKCAST, name);
return name;
}
@Override
public void parse(MethodVisitorProxy mv, int local, VariableManager vm) {
for (LoopFunction block : blocks) {
block.restore(mv, vm);
}
mv.visitJumpInsn(GOTO, lblContinue);
}
/**
* 参数代码转换，根据节点的信息将参数转换成数组放入JVM语句栈中。
*
* @param mv ASM方法访问对象
* @param local ASM方法内部的语句栈局部变量起始位置
* @param vm 变量管理器
*/
public void parseAllParameters(MethodVisitorProxy mv, int local, VariableManager vm) {
int len = PARAMETERS != null ? PARAMETERS.length : 0;
if (allDesc.get(this.getClass().getName()) != null) {
if (len > 0) {
for (int i = 0; i < len; i++) {
if (PARAMETERS[i] == null) {
mv.visitLdcInsn(null);
} else {
PARAMETERS[i].parse(mv, local, vm);
}
}
}
} else {
if (len == 0) {
// 没有参数
mv.visitLdcInsn(null);
} else {
mv.visitLdcInsn(PARAMETERS.length);
mv.visitTypeInsn(ANEWARRAY, "java/lang/Object");
for (int i = 0; i < len; i++) {
if (PARAMETERS[i] == null) {
continue;
}
mv.visitInsn(DUP);
mv.visitLdcInsn(i);
PARAMETERS[i].parseObject(mv, local, vm);
mv.visitInsn(AASTORE);
}
}
}
}
@Override
public void parseSelf(MethodVisitorProxy mv, int local, VariableManager vm) {
mv.visitTypeInsn(NEW, "java/util/HashMap");
mv.visitInsn(DUP);
mv.visitMethodInsn(INVOKESPECIAL, "java/util/HashMap", "<init>", "()V");
for (Map.Entry<String, Expression> entry : value.entrySet()) {
mv.visitInsn(DUP);
mv.visitLdcInsn(entry.getKey());
entry.getValue().parseObject(mv, local, vm);
mv.visitMethodInsn(
INVOKEVIRTUAL,
"java/util/HashMap",
"put",
"(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;");
mv.visitInsn(POP);
}
}