org.unlaxer.tinyexpression.evaluator.javacode.SimpleBuilder 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.stream.Stream;


public class SimpleBuilder{
	
	int index;
	StringBuilder builder;
	
	public SimpleBuilder() {
		this(0);
	}

	
	public SimpleBuilder(int index) {
		this(index, new StringBuilder());
	}

	public SimpleBuilder(int index, StringBuilder builder) {
		super();
		this.index = index;
		this.builder = builder;
	}
	
	public SimpleBuilder incTab() {
		++index;
		return this;
	}
	public SimpleBuilder decTab() {
		--index;
		return this;
		 
	}
	
	public SimpleBuilder append(String word) {
		builder.append(word);
		return this;
	}
	public SimpleBuilder withTab(String word) {
		tab();
		builder.append(word);
		return this;
	}

	
	public SimpleBuilder line(String word) {
		tab();
		append(word+"\n");
		return this;
	}
	public SimpleBuilder lines(String lines) {
		String[] split = lines.split("\n");
		for (String line : split) {
			tab();
			append(line+"\n");
		}
		return this;
	}
	
	public SimpleBuilder lines(Stream linesStream) {
		linesStream.forEach(this::line);
		return this;
	}


	static byte tabBytes = "\t".getBytes()[0];
	private SimpleBuilder tab() {
		byte[] tabs = new byte[index];
		for(int i = 0 ; i < index ; i++) {
			tabs[i] = tabBytes;
		}
		builder.append(new String(tabs));
		return this;
	}
	
	
	public SimpleBuilder w(String word) {
		word = word == null  ? "" :  word;
		append("\"" + word.replaceAll("\"","\\\"") +  "\"");
		return this;
	}
	
	public SimpleBuilder p(String word) {
		word = word == null  ? "" :  word;
		append("(" + word +  ")");
		return this;
	}

	
//	public SimpleBuilder include(Path path) {
//		try(InputStream input = Files.newInputStream(path)){
//			
//			String text = IOUtils.toString(input, StandardCharsets.UTF_8);
//			append(text);
//			return this;
//		} catch (IOException e) {
//			throw new UncheckedIOException(e);
//		}
//		
//	}

	@Override
	public String toString() {
		return builder.toString();
	}


	public SimpleBuilder n() {
		append("\n");
		return this;
	}
}