1 package org.opendaylight.controller.config.yangjmxgenerator.plugin.util;
3 import com.google.common.base.Joiner;
4 import com.google.common.base.Optional;
5 import com.google.common.base.Splitter;
6 import com.google.common.base.Strings;
7 import org.apache.commons.lang3.StringUtils;
8 import org.opendaylight.controller.config.yangjmxgenerator.plugin.java.FullyQualifiedName;
9 import org.slf4j.Logger;
10 import org.slf4j.LoggerFactory;
12 import java.util.List;
13 import java.util.regex.Pattern;
15 public class StringUtil {
16 private static final Logger logger = LoggerFactory.getLogger(StringUtils.class);
19 * @param list of strings to be joined by ','
20 * @param prefix e.g. 'extends' or 'implements'
22 public static String prefixAndJoin(List<FullyQualifiedName> list, String prefix) {
26 Joiner joiner = Joiner.on(",");
27 return " " + prefix + " " + joiner.join(list);
30 public static String addAsterixAtEachLineStart(String input) {
31 String s = Pattern.compile("^", Pattern.MULTILINE).matcher(input).replaceAll("* ");
32 // remove trailing spaces
33 s = Pattern.compile("\\s+$", Pattern.MULTILINE).matcher(s).replaceAll("");
34 s = ensureEndsWithSingleNewLine(s);
38 private static String ensureEndsWithSingleNewLine(String s) {
39 // .split Only trailing empty strings are skipped.
40 String[] split = s.split("\n");
41 s = Joiner.on("\n").join(split);
46 public static String writeComment(String input, boolean isJavadoc) {
47 StringBuilder content = new StringBuilder();
54 content.append(addAsterixAtEachLineStart(input));
55 content.append("*/\n");
56 return content.toString();
60 public static Optional<String> loadCopyright() {
62 * FIXME: BUG-980: this is a nice feature, but the copyright needs to come
63 * from the project being processed, not this one.
64 try (InputStream in = StringUtil.class.getResourceAsStream("/copyright.txt")) {
66 return Optional.of(IOUtils.toString(in));
68 } catch (IOException e) {
69 logger.warn("Cannot load copyright.txt", e);
73 return Optional.absent();
76 public static String formatJavaSource(String input) {
77 Iterable<String> split = Splitter.on("\n").trimResults().split(input);
80 StringBuilder sb = new StringBuilder();
81 int intends = 0, empty = 0;
82 for (String line : split) {
83 intends -= StringUtils.countMatches(line, "}");
87 if (line.isEmpty() == false) {
88 sb.append(Strings.repeat(" ", basicIndent * intends));
93 empty++; // one empty line is allowed
98 intends += StringUtils.countMatches(line, "{");
100 return ensureEndsWithSingleNewLine(sb.toString());