org.apache.poi.xslf.model.geom.ExpressionParser Maven / Gradle / Ivy
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* http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.poi.xslf.model.geom;
import java.util.HashMap;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* A simple regexp-based parser of shape guide formulas in DrawingML
*
* @author Yegor Kozlov
*/
public class ExpressionParser {
static final HashMap impls = new HashMap();
static {
impls.put("\\*/ +([\\-\\w]+) +([\\-\\w]+) +([\\-\\w]+)", MultiplyDivideExpression.class);
impls.put("\\+- +([\\-\\w]+) +([\\-\\w]+) +([\\-\\w]+)( 0)?", AddSubtractExpression.class);
impls.put("\\+/ +([\\-\\w]+) +([\\-\\w]+) +([\\-\\w]+)", AddDivideExpression.class);
impls.put("\\?: +([\\-\\w]+) +([\\-\\w]+) +([\\-\\w]+)", IfElseExpression.class);
impls.put("val +([\\-\\w]+)", LiteralValueExpression.class);
impls.put("abs +([\\-\\w]+)", AbsExpression.class);
impls.put("sqrt +([\\-\\w]+)", SqrtExpression.class);
impls.put("max +([\\-\\w]+) +([\\-\\w]+)", MaxExpression.class);
impls.put("min +([\\-\\w]+) +([\\-\\w]+)", MinExpression.class);
impls.put("at2 +([\\-\\w]+) +([\\-\\w]+)", ArcTanExpression.class);
impls.put("sin +([\\-\\w]+) +([\\-\\w]+)", SinExpression.class);
impls.put("cos +([\\-\\w]+) +([\\-\\w]+)", CosExpression.class);
impls.put("tan +([\\-\\w]+) +([\\-\\w]+)", TanExpression.class);
impls.put("cat2 +([\\-\\w]+) +([\\-\\w]+) +([\\-\\w]+)", CosineArcTanExpression.class);
impls.put("sat2 +([\\-\\w]+) +([\\-\\w]+) +([\\-\\w]+)", SinArcTanExpression.class);
impls.put("pin +([\\-\\w]+) +([\\-\\w]+) +([\\-\\w]+)", PinExpression.class);
impls.put("mod +([\\-\\w]+) +([\\-\\w]+) +([\\-\\w]+)", ModExpression.class);
}
public static Expression parse(String str){
for(String regexp : impls.keySet()) {
Pattern ptrn = Pattern.compile(regexp);
Matcher m = ptrn.matcher(str);
if(m.matches()) {
Class c = impls.get(regexp);
try {
return (Expression)c.getDeclaredConstructor(Matcher.class).newInstance(m);
} catch (Exception e){
throw new RuntimeException(e);
}
}
}
throw new RuntimeException("Unsupported formula: " + str);
}
}