/**
* Generates code to cast an OJ expression as another type. The target type is limited to being an
* AssignableValue. See class description for an explanation of the arguments.
*
* @return resulting expression. If lhsExp was provided, assigns this expression to lhsExp.
*/
public Expression convertCastToAssignableValue(
FarragoRexToOJTranslator translator,
StatementList stmtList,
RelDataType lhsType,
RelDataType rhsType,
Expression lhsExp,
Expression rhsExp) {
CastHelper helper =
new CastHelper(translator, stmtList, null, lhsType, rhsType, lhsExp, rhsExp);
return helper.castToAssignableValue();
}
/**
* Generates code to cast an OJ expression as another type. See class description for an
* explanation of arguments.
*
* @return resulting expression. If lhsExp was provided, assigns this expression to lhsExp.
*/
public Expression convertCastOrAssignment(
FarragoRexToOJTranslator translator,
StatementList stmtList,
String targetName,
RelDataType lhsType,
RelDataType rhsType,
Expression lhsExp,
Expression rhsExp) {
CastHelper helper =
new CastHelper(translator, stmtList, targetName, lhsType, rhsType, lhsExp, rhsExp);
return helper.implement();
}
public void processPacket(List<?> dp) {
this.debug("processPacket(" + dp + ")");
if (dp.size() < 1) {
this.log("processPacket(..) decoded data is too small: " + dp);
return;
}
assert dp.size() >= 1;
String type = CastHelper.cast(dp.get(0), String.class);
Method m = this.handlers.get(type);
if (m == null) {
this.log("processPacket(..) unhandled packet: " + type);
return;
}
Class<?>[] paramTypes = m.getParameterTypes();
assert dp.size() == (paramTypes.length + 1);
Object[] params = new Object[paramTypes.length];
int index = 0;
for (Class<?> paramType : paramTypes) {
assert paramType != null;
Object v = dp.get(1 + index);
params[index] = this.cast(v, paramType);
index++;
}
this.invokePacketMethod(m, params);
}
/** 校验IC卡密码 每次写卡之前都需要校验密码 */
public void chkPwd(String cardPwd) {
byte[] key_buffer = new byte[50];
int rc;
CastHelper.AsciiToHex(cardPwd, key_buffer);
rc = reader.csc_4442(0, 3, key_buffer);
if (rc == 0) {
ToastHelper.showShort(mActivity, "密码正确");
} else {
ToastHelper.showShort(mActivity, "密码错误");
}
}
// implement FarragoOJRexImplementor
public Expression implementFarrago(
FarragoRexToOJTranslator translator, RexCall call, Expression[] operands) {
RelDataType lhsType = call.getType();
RelDataType rhsType = call.operands[0].getType();
Expression rhsExp = operands[0];
SqlTypeName lhsTypeName = lhsType.getSqlTypeName();
if ((lhsTypeName == SqlTypeName.CURSOR) || (lhsTypeName == SqlTypeName.COLUMN_LIST)) {
// Conversion should already have been taken care of outside.
return rhsExp;
}
// NOTE jvs 19-Nov-2008: In some cases (e.g. FRG-273) a cast
// may be illegal at the SQL level, but allowable as part of
// implementation, so don't try to enforce
// SqlTypeUtil.canCastFrom here. Anything which was supposed
// to have been prevented should already have been caught
// by the validator.
CastHelper helper =
new CastHelper(translator, null, call.toString(), lhsType, rhsType, null, rhsExp);
return helper.implement();
}
/**
* 将给定字符串写入到IC卡中指定位置
*
* @param offset
* @param cardData
*/
public void writeCard(int offset, String cardData, String cardPwd) {
if (reader.ic_init(mActivity, 0, 0) == 0) {
chkPwd(cardPwd);
byte[] data_buffer = new byte[256];
CastHelper.AsciiToHex(cardData, data_buffer);
int rc;
rc = reader.swr_4442(0, offset, cardData.length() / 2, data_buffer);
if (0 == rc) {
ToastHelper.showShort(mActivity, "写卡成功");
} else {
ToastHelper.showShort(mActivity, "写卡失败");
}
}
reader.ic_exit(0);
}
public String readCard(int offset, int len) {
String result = null;
if (reader.ic_init(mActivity, 0, 0) == 0) {
ToastHelper.showShort(mActivity, "连接成功");
byte[] data_buffer = new byte[256];
for (int i = 0; i < data_buffer.length; i++) {
data_buffer[i] = (byte) 0;
}
int rc;
rc = reader.srd_4442(0, offset, len, data_buffer);
if (0 == rc) {
result = CastHelper.get_recv_data_str(data_buffer, len);
} else {
ToastHelper.showShort(mActivity, "读卡失败");
}
} else {
ToastHelper.showShort(mActivity, "写卡器连接失败");
}
return result;
}