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SPL(Structured Process Language) A programming language specially for structured data computing.
package com.scudata.expression.fn.convert;
import com.scudata.array.IArray;
import com.scudata.array.StringArray;
import com.scudata.common.Escape;
import com.scudata.common.MessageManager;
import com.scudata.common.RQException;
import com.scudata.common.StringUtils;
import com.scudata.dm.Context;
import com.scudata.expression.Function;
import com.scudata.expression.IParam;
import com.scudata.resources.EngineMessage;
import com.scudata.util.Variant;
/**
* ???????????????ת?????ַ???
* string(expression{, format}:loc)
* ???????????????ת?????ַ??ͣ?ת???????п??Ը?ʽ????locΪ???ԣ?????????ʱ?????ã?ȱʡʹ??ϵͳ???ԡ?
* @author runqian
*
*/
public class ToString extends Function {
/**
* ??????ʽ????Ч?ԣ???Ч???׳??쳣
*/
public void checkValidity() {
if (param == null) {
MessageManager mm = EngineMessage.get();
throw new RQException("string" + mm.getMessage("function.missingParam"));
}
}
public Object calculate(Context ctx) {
Object val;
String fmt = null;
String locale = null;
if (param.isLeaf()) {
val = param.getLeafExpression().calculate(ctx);
} else {
if (param.getSubSize() != 2) {
MessageManager mm = EngineMessage.get();
throw new RQException("string" + mm.getMessage("function.invalidParam"));
}
IParam sub0 = param.getSub(0);
IParam sub1 = param.getSub(1);
if (sub0 == null || sub1 == null) {
MessageManager mm = EngineMessage.get();
throw new RQException("string" + mm.getMessage("function.invalidParam"));
}
val = sub0.getLeafExpression().calculate(ctx);
if (sub1.isLeaf()) {
Object obj = sub1.getLeafExpression().calculate(ctx);
if (obj instanceof String) {
fmt = (String)obj;
} else if (obj != null) {
MessageManager mm = EngineMessage.get();
throw new RQException("string" + mm.getMessage("function.paramTypeError"));
}
} else {
IParam fmtParam = sub1.getSub(0);
IParam locParam = sub1.getSub(1);
if (fmtParam == null || locParam == null) {
MessageManager mm = EngineMessage.get();
throw new RQException("string" + mm.getMessage("function.invalidParam"));
}
Object obj = fmtParam.getLeafExpression().calculate(ctx);
if (!(obj instanceof String)) {
MessageManager mm = EngineMessage.get();
throw new RQException("string" + mm.getMessage("function.paramTypeError"));
}
fmt = (String)obj;
obj = locParam.getLeafExpression().calculate(ctx);
if (!(obj instanceof String)) {
MessageManager mm = EngineMessage.get();
throw new RQException("string" + mm.getMessage("function.paramTypeError"));
}
locale = (String)obj;
}
}
if (val instanceof String) {
String str = (String)val;
String opt = this.option;
if (opt != null) {
if (opt.indexOf('u') != -1) {
StringBuffer sb = new StringBuffer(str.length() + 16);
StringUtils.deunicode(str, sb, "\"'");
str = sb.toString();
} else if (opt.indexOf('e') != -1) {
str = Escape.add(str);
}
if (opt.indexOf('q') != -1) {
str = '"' + str + '"';
}
}
return str;
} else {
if (fmt == null) {
return Variant.toString(val);
} else if (locale == null) {
return Variant.format(val, fmt);
} else {
return Variant.format(val, fmt, locale);
}
}
}
/**
* ??????????еĽ??
* @param ctx ??????????
* @return IArray
*/
public IArray calculateAll(Context ctx) {
if (param.isLeaf()) {
IArray array = param.getLeafExpression().calculateAll(ctx);
boolean isUnicode = false, isEscape = false, isQuote = false;
if (option != null) {
if (option.indexOf('u') != -1) {
isUnicode = true;
} else if (option.indexOf('e') != -1) {
isEscape = true;
}
if (option.indexOf('q') != -1) {
isQuote = true;
}
}
int len = array.size();
StringArray result = new StringArray(len);
result.setTemporary(true);
if (isUnicode) {
StringBuffer sb = new StringBuffer(128);
for (int i = 1; i <= len; ++i) {
Object val = array.get(i);
String str;
if (val instanceof String) {
StringUtils.deunicode((String)val, sb, "\"'");
str = sb.toString();
sb.setLength(0);
} else {
str = Variant.toString(val);
}
if (isQuote) {
result.pushString('"' + str + '"');
} else {
result.pushString(str);
}
}
} else if (isEscape) {
for (int i = 1; i <= len; ++i) {
Object val = array.get(i);
String str;
if (val instanceof String) {
str = Escape.add((String)val);
} else {
str = Variant.toString(val);
}
if (isQuote) {
result.pushString('"' + str + '"');
} else {
result.pushString(str);
}
}
} else {
for (int i = 1; i <= len; ++i) {
Object val = array.get(i);
String str;
if (val instanceof String) {
str = (String)val;
} else {
str = Variant.toString(val);
}
if (isQuote) {
result.pushString('"' + str + '"');
} else {
result.pushString(str);
}
}
}
return result;
}
if (param.getSubSize() != 2) {
MessageManager mm = EngineMessage.get();
throw new RQException("string" + mm.getMessage("function.invalidParam"));
}
IParam sub0 = param.getSub(0);
IParam sub1 = param.getSub(1);
if (sub0 == null || sub1 == null) {
MessageManager mm = EngineMessage.get();
throw new RQException("string" + mm.getMessage("function.invalidParam"));
}
String fmt = null;
String locale = null;
if (sub1.isLeaf()) {
Object obj = sub1.getLeafExpression().calculate(ctx);
if (obj instanceof String) {
fmt = (String)obj;
} else if (obj != null) {
MessageManager mm = EngineMessage.get();
throw new RQException("string" + mm.getMessage("function.paramTypeError"));
}
} else {
IParam fmtParam = sub1.getSub(0);
IParam locParam = sub1.getSub(1);
if (fmtParam == null || locParam == null) {
MessageManager mm = EngineMessage.get();
throw new RQException("string" + mm.getMessage("function.invalidParam"));
}
Object obj = fmtParam.getLeafExpression().calculate(ctx);
if (!(obj instanceof String)) {
MessageManager mm = EngineMessage.get();
throw new RQException("string" + mm.getMessage("function.paramTypeError"));
}
fmt = (String)obj;
obj = locParam.getLeafExpression().calculate(ctx);
if (!(obj instanceof String)) {
MessageManager mm = EngineMessage.get();
throw new RQException("string" + mm.getMessage("function.paramTypeError"));
}
locale = (String)obj;
}
IArray array = sub0.getLeafExpression().calculateAll(ctx);
int len = array.size();
StringArray result = new StringArray(len);
result.setTemporary(true);
if (locale == null) {
for (int i = 1; i <= len; ++i) {
String str = Variant.format(array.get(i), fmt);
result.pushString(str);
}
} else {
for (int i = 1; i <= len; ++i) {
String str = Variant.format(array.get(i), fmt, locale);
result.pushString(str);
}
}
return result;
}
}