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java.lang.Object | +--ipworkszip.Jar
The Jar bean may be used to create or decompress Java archives.
The operation of the bean is similar to that of Zip . .class and other files may be added into a .jar file, and then may be imported into Java code or executed by a JVM.
To create a new archive, first set the ArchiveFile
property to the
name of the archive to be created. Then, specify the files to be compressed
either by invoking IncludeFiles
, or by adding a new object to the Files
collection and setting the values of the DecompressedName and CompressedName .
fields. Finally, call the Compress
method to create the archive.
To decompress an existing archive, set ArchiveFile
to the name of the
archive to be decompressed. The ExtractToPath
property may be set, and
then calling the ExtractAll
method will decompress all files in the archive
to this path.
For finer control, the Scan
method should be used to read the file
information stored in the archive. This will fill out the information in the Files
collection. The values of DecompressedName may then
be changed if desired. Finally, ExtractAll
may be used to decompress the
entire archive, or Extract
may be used for finer control.
Data may be streamed out by setting WriteToProgressEvent
to true.
Then, the Progress
event may be trapped to retrieve the data.
All Java archives contain two special entries, a META-INF directory and a manifest.
By default, the bean will automatically generate a default manifest and add
the special entries to the beginning of the archive. To instead add a custom manifest to
the archive the ManifestFile
property should be set.
During decompression, the archive is treated as an ordinary zip file.
Example (Creating a Jar File)
ZipControl.ArchiveFile = "c:\\test.jar"
ZipControl.RecurseSubdirectories = false
ZipControl.IncludeFiles("c:\\code\\*.class")
ZipControl.ManifestFile = "c:\\code\\manifest.mf"
ZipControl.Compress()
Example (Extracting from a Jar File)
ZipControl.ArchiveFile = "c:\\test.jar"
ZipControl.ExtractToPath = "c:\\unzipped\\"
ZipControl.Extract("*.class")
Constructor Summary | |
Jar()
|
Method Summary | |
void |
abort()
Aborts the current operation. |
void |
addJarEventListener(ipworkszip.JarEventListener l)
|
void |
appendFiles()
Adds specified files to an existing archive. |
void |
compress()
Creates the compressed archive. |
java.lang.String |
config(java.lang.String configurationString)
Sets or retrieves a configuration setting. |
void |
delete(java.lang.String filenames)
Deletes one or more files from an existing archive. |
void |
extract(java.lang.String filenames)
Extracts a single file, directory, or group of files, from the archive. |
void |
extractAll()
Extracts all files from the compressed archive. |
java.lang.String |
getArchiveFile()
The name of the zip, gzip, tar, or jar archive. |
int |
getCompressionLevel()
The compression level to use. |
java.lang.String |
getExcludedFiles()
A list of files to exclude. |
java.lang.String |
getExtractToPath()
A base path to decompress to. |
ipworkszip.JARFileList |
getFiles()
Collection of Jar archive files. |
java.lang.String |
getManifestFile()
The name of the manifest file. |
void |
includeFiles(java.lang.String filenames)
Specifies that the indicated files should be added to the archive. |
boolean |
isOverwriteFiles()
Whether or not to overwrite files. |
boolean |
isRecurseSubdirectories()
Whether or not to recurse into subdirectories. |
void |
removeJarEventListener(ipworkszip.JarEventListener l)
|
void |
reset()
Resets the bean. |
void |
scan(javax.servlet.http.HttpServletRequest request)
Scans the compressed archive. |
void |
setArchiveFile(java.lang.String archiveFile)
The name of the zip, gzip, tar, or jar archive. |
void |
setArchiveInputStream(java.io.InputStream archiveStream)
The stream to read the zip, tar, jar, or gzip archive from. |
void |
setArchiveOutputStream(java.io.OutputStream archiveStream)
The stream to write the zip, tar, jar, or gzip archive to. |
void |
setCompressionLevel(int compressionLevel)
The compression level to use. |
void |
setExcludedFiles(java.lang.String excludedFiles)
A list of files to exclude. |
void |
setExtractToPath(java.lang.String extractToPath)
A base path to decompress to. |
void |
setManifestFile(java.lang.String manifestFile)
The name of the manifest file. |
void |
setOverwriteFiles(boolean overwriteFiles)
Whether or not to overwrite files. |
void |
setRecurseSubdirectories(boolean recurseSubdirectories)
Whether or not to recurse into subdirectories. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public Jar()
Method Detail |
public java.lang.String getArchiveFile()
This property specifies the name of the archive to be read or written. This property is required when extracting files.
When Scan
, Extract
, or ExtractAll
is invoked, the file specified by ArchiveFile will be opened for read. If the file does not exist, a trappable
error will be generated.
When Compress
is called, the file named by ArchiveFile will be written; if
a file of this name already exists the Overwrite
event will be fired. If ArchiveFile is set to the empty string (""), the archive will not be
written to disk, and will be provided only through the Progress
event.
The filename may be specified with or without a path. Paths may be relative or absolute, and should be specified in the format native to the host operating system. The filename should be specified with the appropriate extension (such as "zip"); an extension will not automatically be appended by the bean.
If the file cannot be read, or written, as appropriate, a trappable error will be generated.
Example (Creating an Archive)
ZipControl.ArchiveFile = "c:\\test.zip"
ZipControl.RecurseSubdirectories = true
ZipControl.IncludeFiles("c:\\foo\\*")
ZipControl.Compress()
Note: an archive already open for read may be closed by setting ArchiveFile to the empty string ("").
public void setArchiveFile(java.lang.String archiveFile) throws IPWorksZipException
This property specifies the name of the archive to be read or written. This property is required when extracting files.
When Scan
, Extract
, or ExtractAll
is invoked, the file specified by ArchiveFile will be opened for read. If the file does not exist, a trappable
error will be generated.
When Compress
is called, the file named by ArchiveFile will be written; if
a file of this name already exists the Overwrite
event will be fired. If ArchiveFile is set to the empty string (""), the archive will not be
written to disk, and will be provided only through the Progress
event.
The filename may be specified with or without a path. Paths may be relative or absolute, and should be specified in the format native to the host operating system. The filename should be specified with the appropriate extension (such as "zip"); an extension will not automatically be appended by the bean.
If the file cannot be read, or written, as appropriate, a trappable error will be generated.
Example (Creating an Archive)
ZipControl.ArchiveFile = "c:\\test.zip"
ZipControl.RecurseSubdirectories = true
ZipControl.IncludeFiles("c:\\foo\\*")
ZipControl.Compress()
Note: an archive already open for read may be closed by setting ArchiveFile to the empty string ("").
IPWorksZipException
public int getCompressionLevel()
This property specifies the level of compression to be used, between 0 and 6. Higher values will cause the bean to compress better; lower values will cause the bean to compress faster. A value of 0 will store the file without compression.
Set the level of CompressionLevel in the BeginFile
event to apply
different levels of compression to different files.
public void setCompressionLevel(int compressionLevel) throws IPWorksZipException
This property specifies the level of compression to be used, between 0 and 6. Higher values will cause the bean to compress better; lower values will cause the bean to compress faster. A value of 0 will store the file without compression.
Set the level of CompressionLevel in the BeginFile
event to apply
different levels of compression to different files.
IPWorksZipException
public java.lang.String getExcludedFiles()
This property specifies files that should be excluded when Compress
or Extract
is invoked. When Compress
is invoked, each value of DecompressedName in Files
will
be compared to ExcludedFiles , and each file will be excluded if the name matches.
When Extract
is called, each value of CompressedName in Files
matching the parameter
to Extract
will be compared to ExcludedFiles , and will be excluded if
appropriate.
This property may be set to one or more filenames or directory names. Files may be
specified with or without a path, and with or without wildcards. If a path is
specified, files in the indicated directory will be excluded; subdirectories will
be recursed into if RecurseSubdirectories
is true. If no path is specified but wildcards are, matching files in all directories
will be excluded. If a single filename without a path is specified, it must correspond
exactly to the appropriate value of CompressedName or DecompressedName .
Directories should end with a slash ("/" or "\\", as appropriate.) If a directory is specified, all files and subdirectories in the specified directory will be excluded.
A pipe character ("|") should be used to separate multiple file or directory names.
The following examples illustrate the use of the property:
Example
ZipControl.ArchiveFile = "c:\\test.zip"
ZipControl.IncludeFiles("c:\\test\\*")
ZipControl.ExcludedFiles = "*.tmp"
ZipControl.Compress()
Example
ZipControl.ArchiveFile = "c:\\test.tar"
ZipControl.Scan()
ZipControl.ExcludedFiles = "*.bak | backup/"
ZipControl.ExtractToPath = "c:\\temp"
ZipControl.Extract("*")
As per the examples, the property should be specified differently for compression and
decompression. When invoking Compress
, the format of ExcludedFiles should
correspond to that of the local file system. When invoking Extract
the format should
correspond to standard (UNIX) format, and should not contain drive letters or backslashes.
You may exclude files based on their attributes as well: See the ExcludedAttributes configuration setting for more information.
If the property is set to the empty string, no files will be excluded. This property is never reset automatically, so be sure to reset it manually if using a single instance of the bean for both compression and extraction. Failure to do so may result in I/O errors or unexpected results.
public void setExcludedFiles(java.lang.String excludedFiles) throws IPWorksZipException
This property specifies files that should be excluded when Compress
or Extract
is invoked. When Compress
is invoked, each value of DecompressedName in Files
will
be compared to ExcludedFiles , and each file will be excluded if the name matches.
When Extract
is called, each value of CompressedName in Files
matching the parameter
to Extract
will be compared to ExcludedFiles , and will be excluded if
appropriate.
This property may be set to one or more filenames or directory names. Files may be
specified with or without a path, and with or without wildcards. If a path is
specified, files in the indicated directory will be excluded; subdirectories will
be recursed into if RecurseSubdirectories
is true. If no path is specified but wildcards are, matching files in all directories
will be excluded. If a single filename without a path is specified, it must correspond
exactly to the appropriate value of CompressedName or DecompressedName .
Directories should end with a slash ("/" or "\\", as appropriate.) If a directory is specified, all files and subdirectories in the specified directory will be excluded.
A pipe character ("|") should be used to separate multiple file or directory names.
The following examples illustrate the use of the property:
Example
ZipControl.ArchiveFile = "c:\\test.zip"
ZipControl.IncludeFiles("c:\\test\\*")
ZipControl.ExcludedFiles = "*.tmp"
ZipControl.Compress()
Example
ZipControl.ArchiveFile = "c:\\test.tar"
ZipControl.Scan()
ZipControl.ExcludedFiles = "*.bak | backup/"
ZipControl.ExtractToPath = "c:\\temp"
ZipControl.Extract("*")
As per the examples, the property should be specified differently for compression and
decompression. When invoking Compress
, the format of ExcludedFiles should
correspond to that of the local file system. When invoking Extract
the format should
correspond to standard (UNIX) format, and should not contain drive letters or backslashes.
You may exclude files based on their attributes as well: See the ExcludedAttributes configuration setting for more information.
If the property is set to the empty string, no files will be excluded. This property is never reset automatically, so be sure to reset it manually if using a single instance of the bean for both compression and extraction. Failure to do so may result in I/O errors or unexpected results.
IPWorksZipException
public java.lang.String getExtractToPath()
Setting the ExtractToPath property affects the operation of the Extract
and ExtractAll
methods. Setting this property to a nonempty string will cause all decompressed
files to be written to the specified path. If pathnames are given in the values of DecompressedName they will be regarded as relative to ExtractToPath .
If the specified directory does not exist, it will be created when extraction is done.
ExtractToPath should always be specified in the format native to the host operating system, and with a trailing slash or backslash. If the path is specified otherwise, it will be immediately converted and stored in the converted format. For example, "/temp" would be immediately converted to "\\temp\\" on a Windows system.
Example (Extracting from an Archive)
ZipControl.ArchiveFile = "c:\\temp.zip"
ZipControl.ExtractToPath = "c:\\unzipped\\"
ZipControl.ExtractAll()
Example - Adding Files
Dim i as Integer
ZipControl.ArchiveFile = "c:\\test.zip"
ZipControl.Scan()
For i = 0 to ZipControl.Files.Count - 1
ZipControl.Files(i).DecompressedName(i) = "c:\\temp\\" + ZipControl.Files(i).DecompressedName
Next i
ZipControl.ExtractToPath = ""
ZipControl.ExtractAll()
ZipControl.IncludeFiles("c:\\extra\\*")
ZipControl.Compress()
public void setExtractToPath(java.lang.String extractToPath) throws IPWorksZipException
Setting the ExtractToPath property affects the operation of the Extract
and ExtractAll
methods. Setting this property to a nonempty string will cause all decompressed
files to be written to the specified path. If pathnames are given in the values of DecompressedName they will be regarded as relative to ExtractToPath .
If the specified directory does not exist, it will be created when extraction is done.
ExtractToPath should always be specified in the format native to the host operating system, and with a trailing slash or backslash. If the path is specified otherwise, it will be immediately converted and stored in the converted format. For example, "/temp" would be immediately converted to "\\temp\\" on a Windows system.
Example (Extracting from an Archive)
ZipControl.ArchiveFile = "c:\\temp.zip"
ZipControl.ExtractToPath = "c:\\unzipped\\"
ZipControl.ExtractAll()
Example - Adding Files
Dim i as Integer
ZipControl.ArchiveFile = "c:\\test.zip"
ZipControl.Scan()
For i = 0 to ZipControl.Files.Count - 1
ZipControl.Files(i).DecompressedName(i) = "c:\\temp\\" + ZipControl.Files(i).DecompressedName
Next i
ZipControl.ExtractToPath = ""
ZipControl.ExtractAll()
ZipControl.IncludeFiles("c:\\extra\\*")
ZipControl.Compress()
IPWorksZipException
public ipworkszip.JARFileList getFiles()
When a compressed archive is scanned or decompressed, the values of this collection are populated accordingly.
When creating a compressed archive, this property may be used to set the files to be stored. For each entry added to the collection, the DecompressedName field should be set to the name of the file to be decompressed, and the CompressedName field should be set to the filename to store in the archive.
Archives may also be created using the IncludeFiles
method. Invoking the IncludeFiles
method causes the values of this collection to be filled out. These
values may then be changed directly if desired.
Note that Jar archives always contain two special entries: a manifest file, and a
META-INF directory. When Compress
is invoked, the values of the CompressedName fields will be checked, and the special entries will be added at the beginning if
necessary. Note that this will cause all existing files to be shifted.
public java.lang.String getManifestFile()
This property specifies the location of the manifest to be written to the jar archive.
The filename may be specified with or without a path. Paths may be relative or absolute, and should be specified in the format native to the host operating system. If the format is not native to the host operating system, the bean will immediately attempt to convert it.
When Compress
is invoked, the location of the manifest is determined according to ManifestFile and the CompressedName and DecompressedName fields of the Files
collection. The collection will be updated immediately prior to compression,
and additional entries will be added at the beginning if necessary. If ManifestFile is set to a nonempty string, its value will be written to the appropriate value of DecompressedName , overwriting any pre-existing value. If ManifestFile is set to an empty string, and any value of the CompressedName field in the Files
collection has the value "META-INF/MANIFEST.MF", the corresponding value of DecompressedName will be used as the source of the manifest. If a source for the
manifest is not specified, a default manifest will automatically be generated and added
to the archive.
When Scan
is called (either by the user or by Extract
or ExtractAll
), the
location of the manifest will be determined, and the value of this property will be set
to the corresponding value of the DecompressedName for that file. The value of ManifestFile may then be changed to write the manifest to a different location.
After calling Scan
, "META-INF/MANIFEST.MF" may be passed as an argument to Extract
to extract the manifest.
If during compression the file cannot be read, a trappable error will be generated.
public void setManifestFile(java.lang.String manifestFile) throws IPWorksZipException
This property specifies the location of the manifest to be written to the jar archive.
The filename may be specified with or without a path. Paths may be relative or absolute, and should be specified in the format native to the host operating system. If the format is not native to the host operating system, the bean will immediately attempt to convert it.
When Compress
is invoked, the location of the manifest is determined according to ManifestFile and the CompressedName and DecompressedName fields of the Files
collection. The collection will be updated immediately prior to compression,
and additional entries will be added at the beginning if necessary. If ManifestFile is set to a nonempty string, its value will be written to the appropriate value of DecompressedName , overwriting any pre-existing value. If ManifestFile is set to an empty string, and any value of the CompressedName field in the Files
collection has the value "META-INF/MANIFEST.MF", the corresponding value of DecompressedName will be used as the source of the manifest. If a source for the
manifest is not specified, a default manifest will automatically be generated and added
to the archive.
When Scan
is called (either by the user or by Extract
or ExtractAll
), the
location of the manifest will be determined, and the value of this property will be set
to the corresponding value of the DecompressedName for that file. The value of ManifestFile may then be changed to write the manifest to a different location.
After calling Scan
, "META-INF/MANIFEST.MF" may be passed as an argument to Extract
to extract the manifest.
If during compression the file cannot be read, a trappable error will be generated.
IPWorksZipException
public boolean isOverwriteFiles()
If this property is set to true, existing files will be overwritten when decompressing. When Extract
or ExtractAll
is called, each file specified in Files
will be checked for
existence. If a file exists, the Overwrite
event will be fired, and the files will be
overwritten if OverwriteFiles is set to true.
More precise control of which files should be overwritten may be gained by listening to the Overwrite
event and altering its parameters when the event is fired.
This property only affects the operation of Extract
and ExtractAll
. When
compressing files, ArchiveFile
will always be overwritten unless the user specifies
otherwise in the Overwrite
event.
public void setOverwriteFiles(boolean overwriteFiles) throws IPWorksZipException
If this property is set to true, existing files will be overwritten when decompressing. When Extract
or ExtractAll
is called, each file specified in Files
will be checked for
existence. If a file exists, the Overwrite
event will be fired, and the files will be
overwritten if OverwriteFiles is set to true.
More precise control of which files should be overwritten may be gained by listening to the Overwrite
event and altering its parameters when the event is fired.
This property only affects the operation of Extract
and ExtractAll
. When
compressing files, ArchiveFile
will always be overwritten unless the user specifies
otherwise in the Overwrite
event.
IPWorksZipException
public boolean isRecurseSubdirectories()
This property affects the behavior of IncludeFiles
and Extract
and the meaning of ExcludedFiles
. If this property is set to true, IncludeFiles
will recurse into all subdirectories whenever
it performs a search on the file system.
Be sure RecurseSubdirectories is set to the appropriate value before
invoking IncludeFiles
, Extract
, or Compress
; changing the value of this
property after method calls will not retroactively alter their effects.
Example (Creating an Archive)
ZipControl.ArchiveFile = "c:\\test.zip"
ZipControl.RecurseSubdirectories = true
ZipControl.IncludeFiles("c:\\foo\\*")
ZipControl.Compress()
public void setRecurseSubdirectories(boolean recurseSubdirectories) throws IPWorksZipException
This property affects the behavior of IncludeFiles
and Extract
and the meaning of ExcludedFiles
. If this property is set to true, IncludeFiles
will recurse into all subdirectories whenever
it performs a search on the file system.
Be sure RecurseSubdirectories is set to the appropriate value before
invoking IncludeFiles
, Extract
, or Compress
; changing the value of this
property after method calls will not retroactively alter their effects.
Example (Creating an Archive)
ZipControl.ArchiveFile = "c:\\test.zip"
ZipControl.RecurseSubdirectories = true
ZipControl.IncludeFiles("c:\\foo\\*")
ZipControl.Compress()
IPWorksZipException
public void abort() throws IPWorksZipException
Abort
may be used to immediately interrupt compression or decompression. Any files partially
written by the bean will be deleted.
In case Append
or Delete
is aborted the archive will be left in its original state.
IPWorksZipException
public void appendFiles() throws IPWorksZipException
All files contained in the Files
collection will be appended to the archive specified
by ArchiveFile
.
When AppendFiles is called, only those files which are to be added to the archive
must exist inside the collection. Note that if you call Scan
or Extract
, you must
empty the collection before adding files to the collection to be appended.
After the file is added, the collection will be updated appropriately.
This method may only be used to add files to an existing archive. To add files to a new
archive, the IncludeFiles
and Compress
methods should be used.
IPWorksZipException
public void compress() throws IPWorksZipException
Invoking Compress creates the archive specified by ArchiveFile
. When the
method is called, all files specified by the DecompressedName field of the Files
collection will be compressed and written to ArchiveFile
.
The compressed data may be streamed out by setting WriteToProgressEvent
to true. If
streaming is enabled the compressed data will also be provided via the Progress
event.
If ArchiveFile
is set to an empty string the archive will be written only to this
event.
The files to compress are specified in the Files
collection.
The file names are specified by CompressedName and DecompressedName .
These should be specified before invoking Compress , either manually or by
invoking IncludeFiles
.
The BeginFile
and EndFile
events will be fired as
files are processed, and the Progress
event will be fired as data is compressed.
Existing files will be overwritten by the bean if OverwriteFiles
is set to true.
Finer control over which files are overwritten may be gained by trapping the Overwrite
event.
Example (Creating an Archive)
ZipControl.ArchiveFile = "c:\\test.zip"
ZipControl.RecurseSubdirectories = true
ZipControl.IncludeFiles("c:\\foo\\*")
ZipControl.Compress()
IPWorksZipException
public java.lang.String config(java.lang.String configurationString) throws IPWorksZipException
Config
is a generic method available in every bean.
It is used to set and retrieve configuration settings
for the
bean.
Configuration settings are similar in functionality to properties,
but they are rarely used. In order to avoid "polluting" the property
namespace of the bean, access to these internal properties is provided through the Config
method.
To set a configuration setting named PROPERTY , you must call Config("PROPERTY=VALUE") , where VALUE is the value of the setting expressed as a string. For boolean values, use the strings "True", "False", "0", "1", "Yes", or "No" (case does not matter).
To read (query) the value of a configuration setting, you must call Config("PROPERTY") . The value will be returned as a string.
The bean accepts one or more of the following configuration settings .
Configuration settings are similar in functionality to properties,
but they are rarely used. In order to avoid "polluting" the property
namespace of the bean, access to these internal properties is provided through the Config
method.
Default - Jar: "UTF-8"
Example - This would set encoding to Japanese Shift-JIS.
Zip1.Config("Encoding=SJIS");
Default: "" (no excluded attributes)
Error
event, instead, and will fail with an exception if the
error is not trapped and explicitly ignored in the event.
Extract
, ExtractAll
, and Compress
will be written to the Progress
event as well as to disk. Applications may stream out the compressed or decompressed
data by trapping this event and copying the data.If WriteToProgressEvent is set to false, the data will not be streamed out, and
the Data parameter of the Progress
event will contain null.
By default, this config is set to false.
IPWorksZipException
public void delete(java.lang.String filenames) throws IPWorksZipException
Delete deletes one or more files from an existing archive, without reprocessing the compressed data. The archive will be opened immediately, and the file(s) will immediately be removed permanently from the archive.
Note that with the Jar component Delete may be used to delete the
manifest. Although this is allowed, an exception will be fired after the deletion is
complete. The exception may be caught and ignored, or Append
may be then used to
replace the manifest.
The list of filenames should be specified exactly as when calling Extract
:
Filenames may be set to one or more filenames or directory names. Files may be
specified with or without a path, and with or without wildcards. If a path is
specified, files in the indicated directory will be affected; subdirectories will
be recursed into if RecurseSubdirectories
is true. If no path is specified but wildcards are, matching files in all directories
will be affected. If a single filename without a path is specified, it must correspond
exactly to the appropriate value of CompressedName .
Directories should end with a slash ("/"). If a directory is specified, all files and subdirectories in the specified directory will be affected.
A pipe character ("|") should be used to separate multiple file or directory names. Alternatively, the method may be invoked repeatedly.
The ExcludedFiles
property may be used to further limit the files to be deleted.
When Delete is used to delete a directory or match wildcards, each file to be
deleted is first compared against ExcludedFiles
, and any files marked as excluded
will not be deleted. When Delete is used to delete a single file, the value of ExcludedFiles
will be ignored.
When the method is invoked, the Scan
method will first be invoked, if it has
not been invoked already. Note that if IncludeFiles
has been invoked, or if the values
of CompressedName and DecompressedName for each file in the Files
collection
have been set, this information will be reset by the call to Scan
.
When deleting multiple files, the bean will operate most efficiently if all filenames are passed to Delete in a single invocation of the method. Invoking Delete repeatedly on large archives is not recommended.
Invoking Delete will only remove files from ArchiveFile
; it will not
delete the files from the disk.
Example
ZipControl.ArchiveFile = "c:\\\\test.zip"
ZipControl.Delete("default_readme.txt");
ZipControl.Append("\\\\mydir\\\\my_readme.txt", "my_readme.txt")
IPWorksZipException
public void extract(java.lang.String filenames) throws IPWorksZipException
Extract extracts one or more files from the archive. The file(s) will be extracted
to the directory specified by ExtractToPath
, and given the names found in the
archive or specified by the DecompressedName of the file in the Files
collection.
Filenames may be set to one or more filenames or directory names. Files may be
specified with or without a path, and with or without wildcards. If a path is
specified, files in the indicated directory will be affected; subdirectories will
be recursed into if RecurseSubdirectories
is true. If no path is specified but wildcards are, matching files in all directories
will be affected. If a single filename without a path is specified, it must correspond
exactly to the appropriate value of CompressedName .
Directories should end with a slash ("/"). If a directory is specified, all files and subdirectories in the specified directory will be affected.
A pipe character ("|") should be used to separate multiple file or directory names. Alternatively, the method may be invoked repeatedly.
The ExcludedFiles
property may be used to further limit the files to be extracted.
When Extract is used to extract a directory or match wildcards, each file to be
extracted is first compared against ExcludedFiles
, and any files marked as excluded
will not be extracted. When Extract is used to extract a single file, the value of ExcludedFiles
will be ignored.
To extract all files in the archive, the ExtractAll
method may be used.
The BeginFile
and EndFile
events will be fired before and after
each file is extracted, and the Progress
event will be fired as the
data is extracted. If WriteToProgressEvent
is set to true,
the decompressed data will be streamed out through the Progress
event.
Example
ZipControl.ArchiveFile = "c:\\test.tar"
ZipControl.ExcludedFiles = "*.bak | backup/"
ZipControl.ExtractToPath = "c:\\temp"
ZipControl.Extract("*")
Example ZipControl.ArchiveFile = "c:\\test.zip"
ZipControl.ExcludedFiles = ""
ZipControl.ExtractToPath = "c:\\temp"
ZipControl.Extract("code/")
Example ZipControl.ArchiveFile = "c:\\test.jar"
ZipControl.ExcludedFiles = "*.txt"
ZipControl.ExtractToPath = "c:\\"
ZipControl.Extract("* | docs/readme.txt")
IPWorksZipException
public void extractAll() throws IPWorksZipException
ExtractAll extracts all files from the archive. The file(s) will be extracted
to the directory specified by ExtractToPath
, and given the names found in the
archive or specified by the DecompressedName field of the file in the Files
collection.
If Scan
has not been invoked when ExtractAll is called, Scan
will
automatically be invoked, and the Files
collection will be set to the values
found in the archive. To manually set the decompressed filenames, Scan
should
be invoked before setting the DecompressedName field.
Invoking this method is equivalent to setting ExcludedFiles
to the empty string, and
then invoking Extract
with "*" as the argument.
The BeginFile
and EndFile
events will be fired before and after
each file is extracted, and the Progress
event will be fired as the
data is extracted. If WriteToProgressEvent
is set to true,
the decompressed data will be streamed out through the Progress
event.
Example (Extracting from an Archive)
ZipControl.ArchiveFile = "c:\\temp.zip"
ZipControl.ExtractToPath = "c:\\unzipped\\"
ZipControl.ExtractAll()
IPWorksZipException
public void includeFiles(java.lang.String filenames) throws IPWorksZipException
IncludeFiles may be used before Compress
, to specify the files to be
compressed. Invoking this method populates the Files
collection accordingly.
Invoking the method does not create or alter the archive.
The argument should be a pipe ("|") -delimited sequence of one or more filenames. The
filenames should be specified with paths if necessary, so that the files may be found on
the local file system. The filenames will be stored as is in the DecompressedName field, and without a pathname in the CompressedName field of the Files
collection.
Filenames may include the wildcards '?', '*', and '< .. >'. '?' will match any single character, and '*' will match an arbitrary sequence of characters. '< .. >' may be used to match any of the characters inside, or a range, such as '<a-z>'.
If wildcards are
specified, the file system will be scanned and all files matching the specified mask will
be added. Moreover, subdirectories will be recursed into if RecurseSubdirectories
is
set to true. When recursing into subdirectories, relative path information will be stored
in CompressedName field of the Files
collection.
The ExcludedFiles
may be used to limit the files to be compressed. This property is
checked when Compress
is invoked, rather than when IncludeFiles is invoked,
so this property may be set before or after invoking IncludeFiles .
Note that invoking IncludeFiles will not reset the bean, or remove
old values of CompressedName and DecompressedName . This may be done
by first clearing the Files
collection.
Example
ZipControl.IncludeFiles("c:\\test\\* | c:\\readme")
ZipControl.ExcludedFiles = "*.tmp"
ZipControl.Compress()
IPWorksZipException
public void reset() throws IPWorksZipException
Reset resets the state of the bean. The Files
collection will be cleared,
all properties will be set to their default values, and any files open will be closed.
IPWorksZipException
public void scan(javax.servlet.http.HttpServletRequest request) throws IPWorksZipException
This method will scan the archive specified by ArchiveFile
. The number of files and
their names and sizes will be determined and written to the Files
collection.
After scanning the archive, the values of DecompressedName may be changed if desired,
and any number of files may be decompressed. The Extract
method allows you to decompress
files of your choice, and the ExtractAll
method will decompress the entire
archive.
Changing the values of the CompressedName field or the number of files in the Files
collection will invalidate the scan. If either of these is changed and Extract
or ExtractAll
is then called; Scan will automatically be called again, and these
values will be reset to their original values.
Calling this method will frequently generate a trappable error if the archive is corrupt. This is not guaranteed, however, as Scan only examines the headers.
Example
Dim i as Integer
ZipControl.ArchiveFile = "c:\\temp.zip"
ZipControl.Scan()
For i = 0 to ZipControl.Files(i).Count -1
Debug.Write("File name : ")
Debug.Write(ZipControl.Files(i).DecompressedName)
Debug.Write(" Size: ")
Debug.WriteLine(ZipControl.Files(i).DecompressedSize)
Next i
IPWorksZipException
public void setArchiveInputStream(java.io.InputStream archiveStream) throws IPWorksZipException
This method should be set when the archive is to be read from a stream when Extract
is called.
By default, and when this is set to null, the bean will read from the file specified
by ArchiveFile
. However, when this is a valid stream, the data will be read from the
stream.
IPWorksZipException
public void setArchiveOutputStream(java.io.OutputStream archiveStream) throws IPWorksZipException
This method should be set when the archive is to be written to a stream when Compress
is called.
By default, and when this is set to null, the bean will write to the file specified
by ArchiveFile
. However, when this is a valid stream, the data will be written to the
stream.
IPWorksZipException
public void addJarEventListener(ipworkszip.JarEventListener l) throws java.util.TooManyListenersException
java.util.TooManyListenersException
public void removeJarEventListener(ipworkszip.JarEventListener l)
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