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;
8 import java.util.regex.Pattern;
9 import org.apache.commons.lang3.StringUtils;
10 import org.opendaylight.controller.config.yangjmxgenerator.plugin.java.FullyQualifiedName;
11 import org.slf4j.Logger;
12 import org.slf4j.LoggerFactory;
14 public class StringUtil {
15 private static final Logger LOG = LoggerFactory.getLogger(StringUtil.class);
18 * @param list of strings to be joined by ','
19 * @param prefix e.g. 'extends' or 'implements'
21 public static String prefixAndJoin(List<FullyQualifiedName> list, String prefix) {
25 Joiner joiner = Joiner.on(",");
26 return " " + prefix + " " + joiner.join(list);
29 public static String addAsterixAtEachLineStart(String input) {
30 String s = Pattern.compile("^", Pattern.MULTILINE).matcher(input).replaceAll("* ");
31 // remove trailing spaces
32 s = Pattern.compile("\\s+$", Pattern.MULTILINE).matcher(s).replaceAll("");
33 s = ensureEndsWithSingleNewLine(s);
37 private static String ensureEndsWithSingleNewLine(String s) {
38 // .split Only trailing empty strings are skipped.
39 String[] split = s.split("\n");
40 s = Joiner.on("\n").join(split);
45 public static String writeComment(String input, boolean isJavadoc) {
46 StringBuilder content = new StringBuilder();
53 content.append(addAsterixAtEachLineStart(input));
54 content.append("*/\n");
55 return content.toString();
59 public static Optional<String> loadCopyright() {
61 * FIXME: BUG-980: this is a nice feature, but the copyright needs to come
62 * from the project being processed, not this one.
63 try (InputStream in = StringUtil.class.getResourceAsStream("/copyright.txt")) {
65 return Optional.of(IOUtils.toString(in));
67 } catch (IOException e) {
68 LOG.warn("Cannot load copyright.txt", e);
72 return Optional.absent();
75 public static String formatJavaSource(String input) {
76 Iterable<String> split = Splitter.on("\n").trimResults().split(input);
79 StringBuilder sb = new StringBuilder();
80 int intends = 0, empty = 0;
81 for (String line : split) {
82 intends -= StringUtils.countMatches(line, "}");
86 if (line.isEmpty() == false) {
87 sb.append(Strings.repeat(" ", basicIndent * intends));
92 empty++; // one empty line is allowed
97 intends += StringUtils.countMatches(line, "{");
99 return ensureEndsWithSingleNewLine(sb.toString());