1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm;
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3 |
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4 | import com.puppycrawl.tools.checkstyle.JavadocDetailNodeParser;
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5 | import com.puppycrawl.tools.checkstyle.api.AbstractCheck;
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6 | import com.puppycrawl.tools.checkstyle.api.DetailAST;
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7 | import com.puppycrawl.tools.checkstyle.api.DetailNode;
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8 | import com.puppycrawl.tools.checkstyle.api.JavadocTokenTypes;
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9 | import com.puppycrawl.tools.checkstyle.api.TokenTypes;
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10 | import com.puppycrawl.tools.checkstyle.utils.JavadocUtils;
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11 |
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12 | /**
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13 | * Checks that there is Javadoc for every top level class, interface or enum.
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14 | */
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15 | public class TopLevelJavadocCheck extends AbstractCheck {
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16 |
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17 | private boolean foundTopLevelClass;
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18 |
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19 | @Override
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20 | public int[] getAcceptableTokens() {
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21 | return getDefaultTokens();
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22 | }
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23 |
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24 | @Override
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25 | public int[] getDefaultTokens() {
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26 | return new int[]{TokenTypes.CLASS_DEF, TokenTypes.INTERFACE_DEF, TokenTypes.ENUM_DEF};
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27 | }
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28 |
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29 | @Override
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30 | public int[] getRequiredTokens() {
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31 | return new int[0];
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32 | }
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33 |
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34 | @Override
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35 | public boolean isCommentNodesRequired() {
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36 | return true;
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37 | }
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38 |
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39 | @Override
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40 | public void beginTree(DetailAST rootAST) {
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41 | foundTopLevelClass = false;
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42 | }
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43 |
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44 | @Override
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45 | public void finishTree(DetailAST rootAST) {
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46 | if (!foundTopLevelClass) {
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47 | this.log(rootAST.getLineNo(), "assertion failure: unable to find toplevel class or interface");
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48 | }
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49 | }
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50 |
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51 | private boolean hasJavadoc(DetailAST ast) {
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52 | DetailAST blockCommentBegin = ast.findFirstToken(TokenTypes.BLOCK_COMMENT_BEGIN);
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53 | if (blockCommentBegin == null) {
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54 | DetailAST modifiers = ast.findFirstToken(TokenTypes.MODIFIERS);
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55 | if (modifiers == null)
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56 | return false;
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57 | blockCommentBegin = modifiers.findFirstToken(TokenTypes.BLOCK_COMMENT_BEGIN);
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58 | if (blockCommentBegin == null) {
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59 | DetailAST annotation = modifiers.findFirstToken(TokenTypes.ANNOTATION);
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60 | if (annotation == null)
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61 | return false;
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62 | blockCommentBegin = annotation.findFirstToken(TokenTypes.BLOCK_COMMENT_BEGIN);
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63 | if (blockCommentBegin == null)
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64 | return false;
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65 | }
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66 | }
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67 | if (!JavadocUtils.isJavadocComment(blockCommentBegin))
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68 | return false;
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69 | DetailNode javadocTree = new JavadocDetailNodeParser().parseJavadocAsDetailNode(blockCommentBegin).getTree();
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70 | return hasProperText(javadocTree);
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71 | }
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72 |
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73 | private boolean hasProperText(DetailNode javadoc) {
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74 | if (javadoc == null) return false;
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75 | for (DetailNode child : javadoc.getChildren()) {
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76 | if (child.getType() == JavadocTokenTypes.TEXT) {
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77 | if (!child.getText().trim().isEmpty())
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78 | return true;
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79 | } else if (child.getType() == JavadocTokenTypes.HTML_ELEMENT) {
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80 | return true;
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81 | }
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82 | }
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83 | return false;
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84 | }
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85 |
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86 | @Override
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87 | public void visitToken(DetailAST ast) {
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88 | DetailAST parent = ast.getParent();
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89 | if (parent == null || parent.getType() == TokenTypes.EOF) {
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90 | foundTopLevelClass = true;
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91 | if (!hasJavadoc(ast)) {
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92 | this.log(ast.getLineNo(), "incomplete or missing Javadoc for top level class or interface");
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93 | }
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94 | }
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95 | }
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96 | }
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