net.sourceforge.plantuml.preproc2.PreprocessorUtils Maven / Gradle / Ivy

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PlantUML is a component that allows to quickly write diagrams from text.
There is a newer version: 1.2024.8
// THIS FILE HAS BEEN GENERATED BY A PREPROCESSOR.
package net.sourceforge.plantuml.preproc2;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.nio.charset.Charset;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import net.sourceforge.plantuml.StringUtils;
import net.sourceforge.plantuml.log.Logme;
import net.sourceforge.plantuml.preproc.ReadLine;
import net.sourceforge.plantuml.preproc.ReadLineReader;
import net.sourceforge.plantuml.preproc.ReadLineSimple;
import net.sourceforge.plantuml.preproc.StartDiagramExtractReader;
import net.sourceforge.plantuml.preproc.Stdlib;
import net.sourceforge.plantuml.security.SURL;
import net.sourceforge.plantuml.text.StringLocated;
import net.sourceforge.plantuml.tim.EaterException;
import net.sourceforge.plantuml.utils.LineLocation;
import net.sourceforge.plantuml.utils.Log;

public class PreprocessorUtils {

	public static String withEnvironmentVariable(String s) {
		final Pattern p = Pattern.compile("%(\\w+)%");

		final Matcher m = p.matcher(s);
		final StringBuffer sb = new StringBuffer(); // Can't be switched to StringBuilder in order to support Java 8
		while (m.find()) {
			final String var = m.group(1);
			final String value = getenv(var);
			if (value != null)
				m.appendReplacement(sb, Matcher.quoteReplacement(value));

		}
		m.appendTail(sb);
		s = sb.toString();
		return s;
	}

	public static String getenv(String var) {
		final String env = System.getProperty(var);
		if (StringUtils.isNotEmpty(env))
			return StringUtils.eventuallyRemoveStartingAndEndingDoubleQuote(env);

		final String getenv = System.getenv(var);
		if (StringUtils.isNotEmpty(getenv))
			return StringUtils.eventuallyRemoveStartingAndEndingDoubleQuote(getenv);

		return null;
	}

	private static InputStream getStdlibInputStream(String filename) {
		final InputStream result = Stdlib.getResourceAsStream(filename);
		// Log.info("Loading sdlib " + filename + " ok");
		return result;
	}

	// ::comment when __CORE__
	public static ReadLine getReaderNonstandardInclude(StringLocated s, String filename) {
		if (filename.endsWith(".puml") == false)
			filename = filename + ".puml";
		Log.info("Loading non standard " + filename);
		final String res = "/stdlib/" + filename;
		InputStream is = Stdlib.class.getResourceAsStream(res);

		if (is == null)
			return null;

		final String description = "[" + filename + "]";
		return ReadLineReader.create(new InputStreamReader(is), description);
	}

	public static ReadLine getReaderStdlibInclude(StringLocated s, String filename) {
		Log.info("Loading sdlib " + filename);
		InputStream is = getStdlibInputStream(filename);
		if (is == null)
			return null;

		final String description = "<" + filename + ">";
		try {
			if (StartDiagramExtractReader.containsStartDiagram(is, s, description)) {
				is = getStdlibInputStream(filename);
				return StartDiagramExtractReader.build(is, s, description);
			}
			is = getStdlibInputStream(filename);
			if (is == null)
				return null;

			return ReadLineReader.create(new InputStreamReader(is), description);
		} catch (IOException e) {
			Logme.error(e);
			return new ReadLineSimple(s, e.toString());
		}
	}

	public static ReadLine getReaderIncludeUrl(final SURL url, StringLocated s, String suf, Charset charset)
			throws EaterException {
		try {
			if (StartDiagramExtractReader.containsStartDiagram(url, s, charset))
				return StartDiagramExtractReader.build(url, s, suf, charset);

			return getReaderInclude(url, s.getLocation(), charset);
		} catch (IOException e) {
			Logme.error(e);
			throw EaterException.located("Cannot open URL " + e.getMessage());
		}

	}

	public static ReadLine getReaderInclude(SURL url, LineLocation lineLocation, Charset charset)
			throws EaterException, UnsupportedEncodingException {
		final InputStream is = url.openStream();
		if (is == null)
			throw EaterException.located("Cannot open URL");

		return ReadLineReader.create(new InputStreamReader(is, charset), url.toString(), lineLocation);
	}

}