8303912: Clean up JavadocTokenizer
Reviewed-by: vromero, jjg
This commit is contained in:
Jim Laskey
parent
c1f5ca115d
commit
1fc218c58b
src/jdk.compiler/share/classes/com/sun/tools/javac/parser
@ -307,15 +307,6 @@ public class JavaTokenizer extends UnicodeReader {
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return false;
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}
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/**
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* Test if the current character is a line terminator.
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*
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* @return true if current character is a line terminator.
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*/
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private boolean isEOLN() {
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return isOneOf('\n', '\r');
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}
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/**
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* Skip and process a line terminator sequence.
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*/
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@ -1094,7 +1085,7 @@ public class JavaTokenizer extends UnicodeReader {
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if (scannerDebug) {
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System.out.println("nextToken(" + pos
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+ "," + endPos + ")=|" +
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new String(getRawCharacters(pos, endPos))
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getRawString(pos, endPos)
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+ "|");
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}
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}
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@ -1146,13 +1137,11 @@ public class JavaTokenizer extends UnicodeReader {
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if (scannerDebug) {
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System.out.println("processComment(" + pos
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+ "," + endPos + "," + style + ")=|"
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+ new String(getRawCharacters(pos, endPos))
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+ getRawString(pos, endPos)
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+ "|");
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}
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char[] buf = getRawCharacters(pos, endPos);
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return new BasicComment(style, fac, buf, pos);
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return new BasicComment(style,this, pos, endPos);
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}
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/**
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@ -1167,8 +1156,8 @@ public class JavaTokenizer extends UnicodeReader {
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protected void processWhiteSpace(int pos, int endPos) {
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if (scannerDebug) {
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System.out.println("processWhitespace(" + pos
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+ "," + endPos + ")=|" +
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new String(getRawCharacters(pos, endPos))
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+ "," + endPos + ")=|"
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+ getRawString(pos, endPos)
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+ "|");
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}
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}
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@ -1182,8 +1171,8 @@ public class JavaTokenizer extends UnicodeReader {
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protected void processLineTerminator(int pos, int endPos) {
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if (scannerDebug) {
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System.out.println("processTerminator(" + pos
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+ "," + endPos + ")=|" +
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new String(getRawCharacters(pos, endPos))
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+ "," + endPos + ")=|"
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+ getRawString(pos, endPos)
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+ "|");
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}
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}
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@ -1206,9 +1195,6 @@ public class JavaTokenizer extends UnicodeReader {
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protected static class BasicComment extends PositionTrackingReader implements Comment {
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/**
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* Style of comment
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* LINE starting with //
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* BLOCK starting with /*
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* JAVADOC starting with /**
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*/
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CommentStyle cs;
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@ -1225,13 +1211,13 @@ public class JavaTokenizer extends UnicodeReader {
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/**
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* Constructor.
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*
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* @param cs comment style
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* @param sf Scan factory.
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* @param array Array containing contents of source.
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* @param offset Position offset in original source buffer.
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* @param cs comment style
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* @param reader existing reader
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* @param pos start of meaningful content in buffer.
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* @param endPos end of meaningful content in buffer.
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*/
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protected BasicComment(CommentStyle cs, ScannerFactory sf, char[] array, int offset) {
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super(sf, array, offset);
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protected BasicComment(CommentStyle cs, UnicodeReader reader, int pos, int endPos) {
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super(reader, pos, endPos);
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this.cs = cs;
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}
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@ -1247,8 +1233,7 @@ public class JavaTokenizer extends UnicodeReader {
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/**
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* Return buffer position in original buffer mapped from buffer position in comment.
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*
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* @param pos buffer position in comment.
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*
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* @param pos buffer position in comment.
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* @return buffer position in original buffer.
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*/
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public int getSourcePos(int pos) {
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@ -1257,11 +1242,8 @@ public class JavaTokenizer extends UnicodeReader {
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/**
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* Return style of comment.
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* LINE starting with //
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* BLOCK starting with /*
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* JAVADOC starting with /**
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*
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* @return
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* @return style of comment.
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*/
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public CommentStyle getStyle() {
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return cs;
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@ -1273,76 +1255,104 @@ public class JavaTokenizer extends UnicodeReader {
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* @return true if comment contains @deprecated.
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*/
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public boolean isDeprecated() {
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if (!scanned && cs == CommentStyle.JAVADOC) {
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if (!scanned) {
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scanDocComment();
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}
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return deprecatedFlag;
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}
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/**
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* Scan JAVADOC comment for details.
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* Detect the deprecated tag.
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*
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* @param line line reader
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*
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* @return true if deprecated tag is present.
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*/
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protected boolean hasDeprecated(UnicodeReader line) {
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return line.accept("@deprecated") &&
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(line.isWhitespace() || line.is('*') || line.isEOLN());
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}
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/**
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* Remove closing star(s) slash from comment.
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*
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* @param line line reader
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*
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* @return new line reader if detected otherwise original line reader.
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*/
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UnicodeReader trimEndOfComment(UnicodeReader line) {
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int pos = line.position();
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while (line.isAvailable()) {
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if (line.is('*')) {
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int endPos = line.position();
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line.skip('*');
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if (line.is('/')) {
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return line.lineReader(pos, endPos);
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}
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} else {
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line.next();
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}
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}
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line.reset(pos);
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return line;
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}
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/**
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* Trim the first part of the JavaDoc comment.
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*
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* @param line line reader
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*
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* @return modified line reader
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*/
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UnicodeReader trimJavadocComment(UnicodeReader line) {
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int pos = line.position();
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line.skipWhitespace();
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if (line.skip('*') == 0) {
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line.reset(pos);
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}
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return trimEndOfComment(line);
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}
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/**
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* Put the line into the buffer.
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*
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* @param line line reader
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*/
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protected void putLine(UnicodeReader line) {
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// ignore overridden in subclass
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}
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/**
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* Scan document comment for content.
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*/
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protected void scanDocComment() {
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try {
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boolean deprecatedPrefix = false;
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accept("/**");
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forEachLine:
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while (isAvailable()) {
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// Skip optional WhiteSpace at beginning of line
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skipWhitespace();
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// Skip optional consecutive Stars
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while (accept('*')) {
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if (is('/')) {
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return;
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}
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}
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// Skip optional WhiteSpace after Stars
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skipWhitespace();
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// At beginning of line in the JavaDoc sense.
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deprecatedPrefix = deprecatedFlag || accept("@deprecated");
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if (deprecatedPrefix && isAvailable()) {
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if (Character.isWhitespace(get())) {
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deprecatedFlag = true;
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} else if (accept('*')) {
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if (is('/')) {
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deprecatedFlag = true;
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return;
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}
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}
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}
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// Skip rest of line
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while (isAvailable()) {
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switch (get()) {
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case '*':
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next();
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if (is('/')) {
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return;
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}
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break;
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case '\r': // (Spec 3.4)
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case '\n': // (Spec 3.4)
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accept('\r');
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accept('\n');
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continue forEachLine;
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default:
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next();
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break;
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}
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} // rest of line
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} // forEachLine
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return;
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} finally {
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if (!scanned) {
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deprecatedFlag = false;
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scanned = true;
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if (!accept("/**")) {
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return;
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}
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while (isAvailable()) {
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UnicodeReader line = lineReader();
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line = trimJavadocComment(line);
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// If standalone @deprecated tag
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int pos = line.position();
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if (hasDeprecated(line)) {
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deprecatedFlag = true;
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}
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line.reset(pos);
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putLine(line);
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}
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}
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}
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}
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@ -79,8 +79,7 @@ public class JavadocTokenizer extends JavaTokenizer {
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@Override
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protected Comment processComment(int pos, int endPos, CommentStyle style) {
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char[] buf = getRawCharacters(pos, endPos);
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return new JavadocComment(style, fac, buf, pos);
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return new JavadocComment(style, this, pos, endPos);
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}
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/**
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@ -88,13 +87,6 @@ public class JavadocTokenizer extends JavaTokenizer {
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* of a Javadoc comment.
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*/
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protected static class JavadocComment extends BasicComment {
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/**
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* Pattern used to detect a well formed @deprecated tag in a Javadoc
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* comment.
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*/
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private static final Pattern DEPRECATED_PATTERN =
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Pattern.compile("(?sm).*^\\s*@deprecated( |$).*");
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/**
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* The relevant portion of the comment that is of interest to Javadoc.
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* Produced by invoking scanDocComment.
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@ -112,45 +104,35 @@ public class JavadocTokenizer extends JavaTokenizer {
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*/
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OffsetMap offsetMap = new OffsetMap();
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JavadocComment(CommentStyle cs, ScannerFactory sf, char[] array, int offset) {
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super( cs, sf, array, offset);
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JavadocComment(CommentStyle cs, UnicodeReader reader, int pos, int endPos) {
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super(cs, reader, pos, endPos);
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this.sb = new StringBuilder();
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}
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/**
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* Add a character to the extraction buffer.
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* Add current character or code point from line to the extraction buffer.
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*
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* @param ch character to add.
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* @param line line reader
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*/
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protected void put(char ch) {
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offsetMap.add(sb.length(), offsetPosition());
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sb.append(ch);
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}
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protected void putLine(UnicodeReader line) {
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while (line.isAvailable()) {
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offsetMap.add(sb.length(), line.position());
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/**
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* Add a code point to the extraction buffer.
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*
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* @param codePoint code point to add.
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*/
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protected void putCodePoint(int codePoint) {
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offsetMap.add(sb.length(), offsetPosition());
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sb.appendCodePoint(codePoint);
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}
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if (line.isSurrogate()) {
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sb.appendCodePoint(line.getCodepoint());
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} else {
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sb.append(line.get());
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}
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/**
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* Add current character or code point to the extraction buffer.
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*/
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protected void put() {
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if (isSurrogate()) {
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putCodePoint(getCodepoint());
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} else {
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put(get());
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line.next();
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}
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offsetMap.add(sb.length(), line.position());
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sb.append('\n');
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}
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@Override
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public String getText() {
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if (!scanned && cs == CommentStyle.JAVADOC) {
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if (!scanned) {
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scanDocComment();
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}
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return docComment;
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@ -171,104 +153,10 @@ public class JavadocTokenizer extends JavaTokenizer {
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@Override
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protected void scanDocComment() {
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try {
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boolean firstLine = true;
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// Skip over /*
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accept("/*");
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// Consume any number of stars
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skip('*');
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// Is the comment in the form /**/, /***/, /****/, etc. ?
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if (is('/')) {
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docComment = "";
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return;
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}
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// Skip line terminator on the first line of the comment.
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if (isOneOf('\n', '\r')) {
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accept('\r');
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accept('\n');
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firstLine = false;
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}
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outerLoop:
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// The outerLoop processes the doc comment, looping once
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// for each line. For each line, it first strips off
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// whitespace, then it consumes any stars, then it
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// puts the rest of the line into the extraction buffer.
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while (isAvailable()) {
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int begin_pos = position();
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// Consume whitespace from the beginning of each line.
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skipWhitespace();
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// Are there stars here? If so, consume them all
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// and check for the end of comment.
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if (is('*')) {
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// skip all of the stars
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skip('*');
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// check for the closing slash.
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if (accept('/')) {
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// We're done with the Javadoc comment
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break outerLoop;
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}
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} else if (!firstLine) {
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// The current line does not begin with a '*' so we will
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// treat it as comment
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reset(begin_pos);
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}
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textLoop:
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// The textLoop processes the rest of the characters
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// on the line, adding them to the extraction buffer.
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while (isAvailable()) {
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if (accept("*/")) {
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// This is the end of the comment, return
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// the contents of the extraction buffer.
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break outerLoop;
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} else if (isOneOf('\n', '\r')) {
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// We've seen a newline. Add it to our
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// buffer and break out of this loop,
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// starting fresh on a new line.
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put('\n');
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accept('\r');
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accept('\n');
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break textLoop;
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} else if (is('\f')){
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next();
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break textLoop; // treat as end of line
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} else {
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// Add the character to our buffer.
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put();
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next();
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}
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} // end textLoop
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firstLine = false;
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} // end outerLoop
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// If extraction buffer is not empty.
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if (sb.length() > 0) {
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// Remove trailing asterisks.
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int i = sb.length() - 1;
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while (i > -1 && sb.charAt(i) == '*') {
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i--;
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}
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sb.setLength(i + 1) ;
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// Store the text of the doc comment
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docComment = sb.toString();
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} else {
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docComment = "";
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}
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try {
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super.scanDocComment();
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} finally {
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scanned = true;
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// Check if comment contains @deprecated comment.
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if (docComment != null && DEPRECATED_PATTERN.matcher(docComment).matches()) {
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deprecatedFlag = true;
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}
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docComment = sb.toString();
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}
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}
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}
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@ -273,9 +273,9 @@ public class Tokens {
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public interface Comment {
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enum CommentStyle {
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LINE,
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BLOCK,
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JAVADOC,
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LINE, // Starting with //
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BLOCK, // starting with /*
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JAVADOC, // starting with /**
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}
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String getText();
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@ -104,15 +104,39 @@ public class UnicodeReader {
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*/
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@SuppressWarnings("this-escape")
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protected UnicodeReader(ScannerFactory sf, char[] array, int length) {
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this(sf.log, array, length);
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}
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/**
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* Constructor.
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*
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* @param log Log for error reporting.
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* @param array array containing contents of source.
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* @param length length of meaningful content in buffer.
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*/
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protected UnicodeReader(Log log, char[] array, int length) {
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this(log, array, 0, length);
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}
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/**
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* Constructor.
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*
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* @param log Log for error reporting.
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* @param array array containing contents of source.
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* @param pos start of meaningful content in buffer.
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* @param endPos end of meaningful content in buffer.
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*/
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@SuppressWarnings("this-escape")
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protected UnicodeReader(Log log, char[] array, int pos, int endPos) {
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this.buffer = array;
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this.length = length;
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this.position = 0;
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this.length = endPos;
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this.position = pos;
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this.width = 0;
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this.character = '\0';
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this.codepoint = 0;
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this.wasBackslash = false;
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this.wasUnicodeEscape = false;
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this.log = sf.log;
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this.log = log;
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nextCodePoint();
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}
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@ -426,25 +450,68 @@ public class UnicodeReader {
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return false;
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}
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/**
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* Match one of the arguments and advance if a match. Returns true if a match.
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*/
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protected boolean acceptOneOf(char ch1, char ch2, char ch3) {
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if (isOneOf(ch1, ch2, ch3)) {
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next();
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return true;
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}
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|
||||
return false;
|
||||
}
|
||||
|
||||
/**
|
||||
* Return a reader which is bracketed by the currect position
|
||||
* and the next line terminator.
|
||||
*
|
||||
* @return a new reader
|
||||
*/
|
||||
protected UnicodeReader lineReader() {
|
||||
int pos = position;
|
||||
skipToEOLN();
|
||||
int endPos = position;
|
||||
accept('\r');
|
||||
accept('\n');
|
||||
return lineReader(pos, endPos);
|
||||
}
|
||||
|
||||
/**
|
||||
* Return a reader which is bracketed by the {@code pos}
|
||||
* and {@code endPos}.
|
||||
*
|
||||
* @param pos initial position
|
||||
* @param endPos end position
|
||||
*
|
||||
* @return a new reader
|
||||
*/
|
||||
protected UnicodeReader lineReader(int pos, int endPos) {
|
||||
return new UnicodeReader(log, buffer, pos, endPos);
|
||||
}
|
||||
|
||||
/**
|
||||
* Skip over all occurrences of character.
|
||||
*
|
||||
* @param ch character to accept.
|
||||
*
|
||||
* @return number of characters skipped
|
||||
*/
|
||||
protected void skip(char ch) {
|
||||
protected int skip(char ch) {
|
||||
int count = 0;
|
||||
while (accept(ch)) {
|
||||
// next
|
||||
count++;
|
||||
}
|
||||
return count;
|
||||
}
|
||||
|
||||
/**
|
||||
* Is ASCII white space character.
|
||||
*
|
||||
* @return true if is ASCII white space character
|
||||
*/
|
||||
protected boolean isWhitespace() {
|
||||
return isOneOf(' ', '\t', '\f');
|
||||
}
|
||||
|
||||
/**
|
||||
@ -456,18 +523,26 @@ public class UnicodeReader {
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Is ASCII line terminator.
|
||||
*
|
||||
* @return true if is ASCII white space character
|
||||
*/
|
||||
protected boolean isEOLN() {
|
||||
return isOneOf('\r', '\n');
|
||||
}
|
||||
|
||||
/**
|
||||
* Skip to end of line.
|
||||
*/
|
||||
protected void skipToEOLN() {
|
||||
while (isAvailable()) {
|
||||
if (isOneOf('\r', '\n')) {
|
||||
if (isEOLN()) {
|
||||
break;
|
||||
}
|
||||
|
||||
next();
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
/**
|
||||
@ -565,6 +640,25 @@ public class UnicodeReader {
|
||||
return Arrays.copyOfRange(buffer, beginIndex, endIndex);
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns a string subset of the input buffer.
|
||||
* The returned string begins at the {@code beginIndex} and
|
||||
* extends to the character at index {@code endIndex - 1}.
|
||||
* Thus the length of the substring is {@code endIndex-beginIndex}.
|
||||
* This behavior is like
|
||||
* {@code String.substring(beginIndex, endIndex)}.
|
||||
* Unicode escape sequences are not translated.
|
||||
*
|
||||
* @param beginIndex the beginning index, inclusive.
|
||||
* @param endIndex the ending index, exclusive.
|
||||
*
|
||||
* @throws ArrayIndexOutOfBoundsException if either offset is outside of the
|
||||
* array bounds
|
||||
*/
|
||||
public String getRawString(int beginIndex, int endIndex) {
|
||||
return new String(buffer, beginIndex, endIndex - beginIndex);
|
||||
}
|
||||
|
||||
/**
|
||||
* This is a specialized version of UnicodeReader that keeps track of the
|
||||
* column position within a given character stream. Used for Javadoc
|
||||
@ -572,11 +666,6 @@ public class UnicodeReader {
|
||||
* to positions in the source file.
|
||||
*/
|
||||
static class PositionTrackingReader extends UnicodeReader {
|
||||
/**
|
||||
* Offset from the beginning of the original reader buffer.
|
||||
*/
|
||||
private final int offset;
|
||||
|
||||
/**
|
||||
* Current column in the comment.
|
||||
*/
|
||||
@ -585,13 +674,12 @@ public class UnicodeReader {
|
||||
/**
|
||||
* Constructor.
|
||||
*
|
||||
* @param sf Scan factory.
|
||||
* @param array Array containing contents of source.
|
||||
* @param offset Position offset in original source buffer.
|
||||
* @param reader existing reader
|
||||
* @param pos start of meaningful content in buffer.
|
||||
* @param endPos end of meaningful content in buffer.
|
||||
*/
|
||||
protected PositionTrackingReader(ScannerFactory sf, char[] array, int offset) {
|
||||
super(sf, array, array.length);
|
||||
this.offset = offset;
|
||||
protected PositionTrackingReader(UnicodeReader reader, int pos, int endPos) {
|
||||
super(reader.log, reader.buffer, pos, endPos);
|
||||
this.column = 0;
|
||||
}
|
||||
|
||||
@ -623,15 +711,6 @@ public class UnicodeReader {
|
||||
protected int column() {
|
||||
return column;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns position relative to the original source buffer.
|
||||
*
|
||||
* @return
|
||||
*/
|
||||
protected int offsetPosition() {
|
||||
return position() + offset;
|
||||
}
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user