org.unlaxer.tinyexpression.evaluator.javacode.StringMethodClauseBuilder Maven / Gradle / Ivy

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a simple parser combinator inspired by RelaxNG

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package org.unlaxer.tinyexpression.evaluator.javacode;

import java.util.List;

import org.unlaxer.Token;
import org.unlaxer.parser.Parser;
import org.unlaxer.tinyexpression.evaluator.javacode.JavaCodeCalculator.CodeBuilder;
import org.unlaxer.tinyexpression.parser.StringContainsParser;
import org.unlaxer.tinyexpression.parser.StringEndsWithParser;
import org.unlaxer.tinyexpression.parser.StringStartsWithParser;

public class StringMethodClauseBuilder implements CodeBuilder {

	public static final StringMethodClauseBuilder SINGLETON = new StringMethodClauseBuilder();

	@Override
	public void build(SimpleBuilder builder, Token token) {
		
		Parser parser = token.parser;
		
		List filteredChildren = token.filteredChildren;
		
		ExpressionOrLiteral left = StringClauseBuilder.SINGLETON.build(filteredChildren.get(0));
		ExpressionOrLiteral right = StringClauseBuilder.SINGLETON.build(filteredChildren.get(1));
		
		builder.append("(")
			.append(left.toString());
		if(parser instanceof StringStartsWithParser) {
			builder.append(".startsWith(");
			
		}else if(parser instanceof StringEndsWithParser) {
			builder.append(".endsWith(");
			
		}else if(parser instanceof StringContainsParser) {
			builder.append(".contains(");
		}else {
			throw new IllegalArgumentException();
		}
		builder
			.append(right.toString())
			.append("))");
	}
}