apache / commons-io - Duplication

Intro

For duplication, we look at places in code where there are 6 or more lines of code that are exactly the same.
Before duplication is calculated, the code is cleaned to remove empty lines, comments, and frequently duplicated constructs such as imports.
You should aim at having as little as possible (<5%) of duplicated code as high-level of duplication can lead to maintenance difficulties, poor factoring, and logical contradictions.

Learn more...

Duplication Overall

5% duplication:

14,977 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
781 duplicated lines

72 duplicates

dependency graphs: 2D graph | 3D graph | 3D graph (with duplicates)...

Duplication per Extension

Duplication per Component (primary)

Longest Duplicates

The list of 50 longest duplicates.

See data for all 72 duplicates...

Size	#	Folders	Files	Lines	Code
19	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	UncheckedBufferedReader.java UncheckedFilterReader.java	133:181 (46%) 125:173 (50%)	view
17	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	TeeInputStream.java TeeReader.java	78:125 (48%) 70:114 (36%)	view
13	x 2	src/main/java/org/apache/commons/io/output src/main/java/org/apache/commons/io/output	ProxyOutputStream.java ProxyWriter.java	121:158 (24%) 137:176 (14%)	view
11	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	CharSequenceInputStream.java ReaderInputStream.java	118:139 (7%) 149:169 (8%)	view
11	x 2	src/main/java/org/apache/commons/io/file src/main/java/org/apache/commons/io/file	CleaningPathVisitor.java DeletingPathVisitor.java	82:104 (23%) 99:121 (18%)	view
10	x 2	src/site/xdoc src/site/xdoc	mail-lists.xml mail-lists.xml	91:103 (8%) 185:195 (8%)	view
10	x 2	ROOT src/site/xdoc	PROPOSAL.html proposal.xml	59:68 (24%) 67:76 (23%)	view
10	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	MessageDigestCalculatingInputStream.java MessageDigestInputStream.java	145:165 (20%) 148:169 (31%)	view
9	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	NullInputStream.java NullReader.java	203:219 (8%) 175:191 (9%)	view
9	x 2	src/main/java/org/apache/commons/io/output src/main/java/org/apache/commons/io/output	ProxyCollectionWriter.java ProxyWriter.java	85:103 (9%) 75:93 (10%)	view
9	x 2	src/main/java/org/apache/commons/io/output src/main/java/org/apache/commons/io/output	ProxyCollectionWriter.java ProxyWriter.java	172:201 (9%) 159:188 (10%)	view
9	x 2	src/main/java/org/apache/commons/io/file src/main/java/org/apache/commons/io/file	CleaningPathVisitor.java DeletingPathVisitor.java	107:119 (19%) 124:136 (15%)	view
9	x 2	src/main/java/org/apache/commons/io/output src/main/java/org/apache/commons/io/output	DeferredFileOutputStream.java DeferredFileOutputStream.java	282:301 (7%) 334:355 (7%)	view
9	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	UncheckedBufferedReader.java UncheckedFilterReader.java	189:207 (21%) 173:191 (23%)	view
9	x 2	src/main/java/org/apache/commons/io src/main/java/org/apache/commons/io	FileUtils.java FileUtils.java	412:425 (1%) 465:478 (1%)	view
8	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	UnixLineEndingInputStream.java WindowsLineEndingInputStream.java	75:93 (18%) 82:100 (17%)	view
8	x 2	src/main/java/org/apache/commons/io/file src/main/java/org/apache/commons/io/file	CleaningPathVisitor.java CopyDirectoryVisitor.java	95:104 (17%) 93:102 (13%)	view
8	x 2	src/main/java/org/apache/commons/io/filefilter src/main/java/org/apache/commons/io/filefilter	AndFileFilter.java OrFileFilter.java	192:199 (15%) 182:189 (16%)	view
8	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	TaggedInputStream.java TaggedReader.java	82:118 (72%) 81:114 (72%)	view
8	x 2	src/main/java/org/apache/commons/io src/main/java/org/apache/commons/io	CopyUtils.java CopyUtils.java	169:191 (9%) 282:305 (9%)	view
8	x 2	src/main/java/org/apache/commons/io/output src/main/java/org/apache/commons/io/output	ProxyCollectionWriter.java ProxyWriter.java	105:124 (8%) 95:114 (9%)	view
8	x 2	src/main/java/org/apache/commons/io/output src/main/java/org/apache/commons/io/output	ProxyCollectionWriter.java ProxyWriter.java	126:155 (8%) 116:147 (9%)	view
8	x 2	src/main/java/org/apache/commons/io/output src/main/java/org/apache/commons/io/output	TaggedOutputStream.java TaggedWriter.java	78:114 (72%) 78:114 (72%)	view
8	x 2	src/main/java/org/apache/commons/io/output src/main/java/org/apache/commons/io/output	ProxyCollectionWriter.java ProxyWriter.java	239:255 (8%) 224:239 (9%)	view
8	x 2	src/main/java/org/apache/commons/io/file src/main/java/org/apache/commons/io/file	CopyDirectoryVisitor.java DeletingPathVisitor.java	93:102 (13%) 112:121 (13%)	view
8	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	NullInputStream.java NullReader.java	305:322 (7%) 288:307 (8%)	view
7	x 2	src/site/xdoc src/site/xdoc	upgradeto2_3.xml upgradeto2_4.xml	31:39 (21%) 31:39 (13%)	view
7	x 2	src/main/java/org/apache/commons/io/file src/main/java/org/apache/commons/io/file	Counters.java Counters.java	119:127 (4%) 241:249 (4%)	view
7	x 2	src/main/java/org/apache/commons/io/output src/main/java/org/apache/commons/io/output	ProxyCollectionWriter.java ProxyWriter.java	222:237 (7%) 208:222 (7%)	view
7	x 2	src/main/java/org/apache/commons/io/output src/main/java/org/apache/commons/io/output	ProxyCollectionWriter.java ProxyWriter.java	257:274 (7%) 241:257 (7%)	view
7	x 2	src/main/java/org/apache/commons/io/output src/main/java/org/apache/commons/io/output	ChunkedOutputStream.java ChunkedWriter.java	158:164 (24%) 77:83 (36%)	view
7	x 2	src/site/xdoc src/site/xdoc	upgradeto2_4.xml upgradeto2_5.xml	65:72 (13%) 135:142 (5%)	view
7	x 2	src/main/java/org/apache/commons/io/output src/main/java/org/apache/commons/io/output	UncheckedFilterOutputStream.java UncheckedFilterWriter.java	123:139 (26%) 149:165 (17%)	view
7	x 2	src/main/java/org/apache/commons/io/output src/main/java/org/apache/commons/io/output	ProxyCollectionWriter.java ProxyWriter.java	203:220 (7%) 190:206 (7%)	view
7	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	CharSequenceInputStream.java ReaderInputStream.java	312:324 (5%) 426:454 (5%)	view
7	x 2	src/site/xdoc src/site/xdoc	upgradeto1_3_1.xml upgradeto1_3_2.xml	40:48 (23%) 50:58 (14%)	view
6	x 2	src/site/xdoc src/site/xdoc	upgradeto1_1.xml upgradeto1_3_2.xml	31:37 (4%) 31:37 (12%)	view
6	x 2	src/site/xdoc src/site/xdoc	upgradeto1_1.xml upgradeto1_3_1.xml	31:37 (4%) 31:37 (20%)	view
6	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	ProxyInputStream.java ProxyReader.java	320:342 (6%) 194:209 (7%)	view
6	x 2	src/site/xdoc src/site/xdoc	upgradeto1_2.xml upgradeto1_3_2.xml	31:37 (12%) 31:37 (12%)	view
6	x 2	ROOT src/site/xdoc	PROPOSAL.html proposal.xml	42:48 (14%) 48:54 (14%)	view
6	x 2	src/main/java/org/apache/commons/io/file src/main/java/org/apache/commons/io/file	AccumulatorPathVisitor.java CopyDirectoryVisitor.java	208:214 (8%) 93:99 (10%)	view
6	x 2	src/site/xdoc src/site/xdoc	upgradeto1_2.xml upgradeto1_3.xml	31:37 (12%) 31:37 (3%)	view
6	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	ProxyInputStream.java ProxyReader.java	320:342 (6%) 173:189 (7%)	view
6	x 2	src/site/xdoc src/site/xdoc	upgradeto2_0_1.xml upgradeto2_1.xml	31:37 (18%) 31:37 (12%)	view
6	x 2	src/main/java/org/apache/commons/io/file src/main/java/org/apache/commons/io/file	AccumulatorPathVisitor.java CleaningPathVisitor.java	208:214 (8%) 95:101 (13%)	view
6	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	Tailer.java Tailer.java	515:531 (1%) 626:645 (1%)	view
6	x 2	src/site/xdoc src/site/xdoc	upgradeto2_0.xml upgradeto2_0_1.xml	31:37 (5%) 31:37 (18%)	view
6	x 2	src/site/xdoc src/site/xdoc	upgradeto1_4.xml upgradeto2_1.xml	31:37 (6%) 31:37 (12%)	view
6	x 2	src/site/xdoc src/site/xdoc	upgradeto1_3_1.xml upgradeto1_3_2.xml	31:37 (20%) 31:37 (12%)	view

Duplicated Units

The list of top 3 duplicated units.

See data for all 3 unit duplicates...

Size	#	Folders	Files	Lines	Code
8	x 2	src/main/java/org/apache/commons/io/output src/main/java/org/apache/commons/io/output	ChunkedWriter.java ChunkedOutputStream.java	76:85 157:166	view
7	x 2	src/main/java/org/apache/commons/io/input src/main/java/org/apache/commons/io/input	TeeReader.java TeeInputStream.java	82:90 91:99	view
6	x 2	src/main/java/org/apache/commons/io/filefilter src/main/java/org/apache/commons/io/filefilter	AndFileFilter.java OrFileFilter.java	193:200 183:190	view