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package com.google.refine.sorting;
import com.google.refine.expr.EvalError;
import com.google.refine.expr.ExpressionUtils;
public class BooleanCriterion extends Criterion {
final static protected EvalError s_error = new EvalError("Not a boolean");
@Override
public KeyMaker createKeyMaker() {
return new KeyMaker() {
@Override
protected Object makeKey(Object value) {
if (ExpressionUtils.isNonBlankData(value)) {
if (value instanceof Boolean) {
return value;
} else if (value instanceof String) {
return Boolean.parseBoolean((String) value);
} else {
return s_error;
}
}
return value;
}
@Override
public int compareKeys(Object key1, Object key2) {
return ((Boolean) key1).compareTo((Boolean) key2);
}
};
}
}