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package com.jclark.xsl.tr;
import com.jclark.xsl.om.*;
import com.jclark.xsl.util.Comparator;
import com.jclark.xsl.expr.ExprContext;
import com.jclark.xsl.expr.StringExpr;
class NodeComparatorTemplate implements ComparatorTemplate {
private final Comparator cmp;
private final StringExpr expr;
NodeComparatorTemplate(Comparator cmp, StringExpr expr) {
this.cmp = cmp;
this.expr = expr;
}
public Comparator instantiate(Node node, final ExprContext context) {
return new Comparator() {
public int compare(Object o1, Object o2) {
return cmp.compare(getKey(o1), getKey(o2));
}
private String getKey(Object obj) {
try {
return expr.eval((Node)obj, context);
}
catch (XSLException e) {
throw new UncheckedXSLException(e);
}
}
};
}
}
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