Impala Public Jenkins has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/21113 )

Change subject: PROTOTYPE (IMPALA-9153): Vendor CZT's cup-maven-plugin
......................................................................


Patch Set 1:

(118 comments)

http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java
File 
java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java:

http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@54
PS1, Line 54:  * Goal which generates parser source files from the given CUP 
parser specifications (*.cup).
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PS1, Line 61: @Mojo(name = "generate", threadSafe = false,
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@71
PS1, Line 71:   @Parameter( property = "cup.sourceDirectory", defaultValue = 
"${project.basedir}/src/main/cup" )
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PS1, Line 80:
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@84
PS1, Line 84:    * Specify that the parser and sym classes are to be placed in 
the named package. By default, no
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@85
PS1, Line 85:    * package specification is put in the generated code (hence 
the classes default to the special
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PS1, Line 91:
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@95
PS1, Line 95:    * Output parser and action code into a file (and class) with 
the given name. If not given, CUP
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@101
PS1, Line 101:
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@107
PS1, Line 107:
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@111
PS1, Line 111:    * Output the symbol constant code into a class with the given 
name instead of the default of
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@119
PS1, Line 119:    * Outputs the symbol constant code as an {@code interface} 
rather than as a {@code class}.
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@123
PS1, Line 123:
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@125
PS1, Line 125:    * Place constants for non-terminals into the symbol constant 
class. The parser does not need
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@126
PS1, Line 126:    * these symbol constants, so they are not normally output. 
However, it can be very helpful to
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@131
PS1, Line 131:
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@133
PS1, Line 133:    * During parser construction the system may detect that an 
ambiguous situation would occur at
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@134
PS1, Line 134:    * runtime. This is called a conflict. In general, the parser 
may be unable to decide whether to
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@135
PS1, Line 135:    * shift (read another symbol) or reduce (replace the 
recognized right hand side of a production
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@136
PS1, Line 136:    * with its left hand side). This is called a shift/reduce 
conflict. Similarly, the parser may not
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@138
PS1, Line 138:    * reduce/reduce conflict. Normally, if one or more of these 
conflicts occur, parser generation is
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@139
PS1, Line 139:    * aborted. However, in certain carefully considered cases it 
may be advantageous to arbitrarily
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@140
PS1, Line 140:    * break such a conflict. In this case CUP uses YACC 
convention and resolves shift/reduce
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@141
PS1, Line 141:    * conflicts by shifting, and reduce/reduce conflicts using 
the "highest priority" production (the
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@142
PS1, Line 142:    * one declared first in the specification). In order to 
enable automatic breaking of conflicts
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@143
PS1, Line 143:    * the -expect option must be given indicating exactly how 
many conflicts are expected. Conflicts
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@148
PS1, Line 148:
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@150
PS1, Line 150:    * Including this option enables a table compaction 
optimization involving reductions. In
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@151
PS1, Line 151:    * particular, it allows the most common reduce entry in each 
row of the parse action table to be
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@152
PS1, Line 152:    * used as the default for that row. This typically saves 
considerable room in the tables, which
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@153
PS1, Line 153:    * can grow to be very large. This optimization has the effect 
of replacing all error entries in a
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@154
PS1, Line 154:    * row with the default reduce entry. While this may sound 
dangerous, if not down right incorrect,
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@155
PS1, Line 155:    * it turns out that this does not affect the correctness of 
the parser. In particular, some
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@156
PS1, Line 156:    * changes of this type are inherent in LALR parsers (when 
compared to canonical LR parsers), and
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@157
PS1, Line 157:    * the resulting parsers will still never read past the first 
token at which the error could be
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@158
PS1, Line 158:    * detected. The parser can, however, make extra erroneous 
reduces before detecting the error, so
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@159
PS1, Line 159:    * this can degrade the parser's ability to do error recovery. 
(Refer to reference [2] pp. 244-247
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@160
PS1, Line 160:    * or reference [3] pp. 190-194 for a complete explanation of 
this compaction technique.)
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@163
PS1, Line 163:    * initialization code sizes. However, CUP 0.10h introduced a 
string-encoding for the parser
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@164
PS1, Line 164:    * tables which is not subject to the standard method-size 
limitations. Consequently, use of this
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@176
PS1, Line 176:
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@178
PS1, Line 178:    * Suppress printing a summary listing such things as the 
number of terminals, non-terminals,
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@185
PS1, Line 185:    * Print short messages indicating progress through various 
parts of the parser generation
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@190
PS1, Line 190:
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@192
PS1, Line 192:    * Output a human readable dump of the grammar.
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PS1, Line 196:
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PS1, Line 198:    * Output a human readable dump of the constructed parse 
states (often needed to resolve parse
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PS1, Line 209:
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PS1, Line 215:
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@221
PS1, Line 221:  
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@223
PS1, Line 223:    * Do not generate code to propagate the left and right hand 
values of terminals to non-terminals,
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@224
PS1, Line 224:    * and then from non-terminals to other terminals. If the left 
and right values aren't going to be
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@225
PS1, Line 225:    * used by the parser, then it will save some runtime 
computation to not generate these position
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@226
PS1, Line 226:    * propagations. This option also keeps the left and right 
label variables from being generated,
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@231
PS1, Line 231:
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@236
PS1, Line 236:    * {@link java_cup.runtime.Scanner}. By default, the generated 
parser refers to this interface,
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@237
PS1, Line 237:    * which means you cannot use these parsers with CUP runtimes 
older than 0.10j. If your parser
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@239
PS1, Line 239:    * {@link java_cup.runtime.Scanner} references and allow 
compatibility with old runtimes. Not many
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PS1, Line 245:
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@249
PS1, Line 249:    * The external parser tables are normally encoded in the 
generated parser file. This option
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@254
PS1, Line 254:    * If the parser tables are too large, they are always written 
to an external file, despite
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@255
PS1, Line 255:    * this option here. This is to avoid "code too large" Java 
compilation errors, caused by
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@262
PS1, Line 262:
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@266
PS1, Line 266:    * CUP produces generic Java code, some of which doesn't get 
used. For instance, the left/right
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@267
PS1, Line 267:    * integer location information for every terminal in 
productions are always generated, even if
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@268
PS1, Line 268:    * they are never used. This creates a series of unused 
warnings that need removing. Another
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@268
PS1, Line 268:    * they are never used. This creates a series of unused 
warnings that need removing. Another
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@269
PS1, Line 269:    * example is when some of the terminal symbols contain 
elements with generic types. This creates
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@270
PS1, Line 270:    * unchecked warnings at various places where such generic 
non-terminal types appear. At this 
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@270
PS1, Line 270:    * unchecked warnings at various places where such generic 
non-terminal types appear. At this
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@271
PS1, Line 271:    * stage it is needed to add an unchecked cast warning 
suppression.
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@274
PS1, Line 274:    * By default this flag is false, and all warnings are added. 
If set to true, our specific warning
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@275
PS1, Line 275:    * suppression is added instead. Warning suppression is added 
locally, so as to not hide any dead
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@279
PS1, Line 279:   @Parameter( property = 
"cup.suppressGeneratedJavaWarningsUnchecked", defaultValue = "false" )
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@281
PS1, Line 281:
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@285
PS1, Line 285:    * Suppress any unused code warnings from CUP action class 
globally.
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@289
PS1, Line 289:   @Parameter( property = 
"cup.suppressGeneratedJavaWarningsUnused", defaultValue = "false" )
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PS1, Line 291:
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PS1, Line 297:
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PS1, Line 315:   
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PS1, Line 324:
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PS1, Line 327:
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PS1, Line 332:
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@334
PS1, Line 334:    * Collects CUP files in the source directory (changed files 
only for incremental builds).
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@335
PS1, Line 335:    *
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PS1, Line 349: //
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PS1, Line 364:     List<File> changed = new ArrayList<File>();
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PS1, Line 430:            throw new MojoExecutionException("Couldn't create 
directories for " + destDir.getName());
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@430
PS1, Line 430:            throw new MojoExecutionException("Couldn't create 
directories for " + destDir.getName());
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@532
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@536
PS1, Line 536:      // refresh generated external parser tables (*.dat files)
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PS1, Line 537:      for (File resourceFile : listFiles) {
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PS1, Line 538:        if (resourceFile.getName().endsWith(".dat")) {
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PS1, Line 539:          refreshFile(resourceFile);
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PS1, Line 540:        }
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PS1, Line 541:      }
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PS1, Line 545:          throw new MojoExecutionException("Couldn't get 
destination directory list of files - " + destDir.getName());
line too long (113 > 90)


http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@545
PS1, Line 545:          throw new MojoExecutionException("Couldn't get 
destination directory list of files - " + destDir.getName());
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@551
PS1, Line 551:    *
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@558
PS1, Line 558:  //FileReader fl = new FileReader(cupFile);; avoid default 
encoding
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@560
PS1, Line 560:                  new InputStreamReader(new 
FileInputStream(cupFile), StandardCharsets.US_ASCII));
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PS1, Line 589:  
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http://gerrit.cloudera.org:8080/#/c/21113/1/java/cup-maven-plugin/src/main/java/net/sourceforge/czt/cup/maven/CupGenerateMojo.java@622
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: Icfea0154465bb2baf6f5dd8033a3717ee55083fc
Gerrit-Change-Number: 21113
Gerrit-PatchSet: 1
Gerrit-Owner: Joe McDonnell <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins <[email protected]>
Gerrit-Comment-Date: Thu, 07 Mar 2024 06:56:35 +0000
Gerrit-HasComments: Yes

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