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package com.jclark.xsl.expr;
import com.jclark.xsl.om.*;
class TranslateFunction extends Function3 {
ConvertibleExpr makeCallExpr(ConvertibleExpr e1, ConvertibleExpr e2, ConvertibleExpr e3) {
final StringExpr se1 = e1.makeStringExpr();
final StringExpr se2 = e2.makeStringExpr();
final StringExpr se3 = e3.makeStringExpr();
return new ConvertibleStringExpr() {
public String eval(Node node, ExprContext context) throws XSLException {
return translate(se1.eval(node, context),
se2.eval(node, context),
se3.eval(node, context));
}
};
}
private static String translate(String s1, String s2, String s3) {
StringBuffer buf = new StringBuffer();
for (int i = 0; i < s1.length(); i++) {
char c = s1.charAt(i);
// FIXME deal with surrogates properly
int j = s2.indexOf(c);
if (j < s3.length())
buf.append(j < 0 ? c : s3.charAt(j));
}
return buf.toString();
}
}
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