public class VFSURI extends java.lang.Object implements java.lang.Comparable<VFSURI>, java.io.Serializable
java.net.URI
which allows special characters like SPACE in paths.
The Java URI
class complains about such chars with a java.net.URISyntaxException
while VFS accepts it. The URI
is final and must not be subclassed.
Constructor and Description |
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VFSURI()
Constructor method for i18n purposes only.
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VFSURI(java.lang.String str)
Constructs a URI by parsing the given string.
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VFSURI(java.lang.String scheme,
java.lang.String ssp,
java.lang.String fragment)
Constructs a URI from the given components.
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VFSURI(java.lang.String scheme,
java.lang.String userInfo,
java.lang.String host,
int port,
java.lang.String path,
java.lang.String query,
java.lang.String fragment)
Constructs a hierarchical URI from the given components.
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VFSURI(java.lang.String scheme,
java.lang.String host,
java.lang.String path,
java.lang.String fragment)
Constructs a hierarchical URI from the given components.
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VFSURI(java.lang.String scheme,
java.lang.String authority,
java.lang.String path,
java.lang.String query,
java.lang.String fragment)
Constructs a hierarchical URI from the given components.
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Modifier and Type | Method and Description |
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int |
compareTo(VFSURI that)
Compares this URI to another object, which must be a URI.
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static VFSURI |
create(java.lang.String str)
Creates a URI by parsing the given string.
|
boolean |
equals(java.lang.Object ob)
Tests this URI for equality with another object.
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java.lang.String |
getAuthority()
Returns the decoded authority component of this URI.
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org.apache.commons.vfs2.FileType |
getFileType()
Getter for the VFS type (file, folder, ...).
|
java.lang.String |
getFragment()
Returns the decoded fragment component of this URI.
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java.lang.String |
getHost()
Returns the host component of this URI.
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java.lang.String |
getPath()
Returns the decoded path component of this URI.
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int |
getPort()
Returns the port number of this URI.
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java.lang.String |
getQuery()
Returns the decoded query component of this URI.
|
java.lang.String |
getRawAuthority()
Returns the raw authority component of this URI.
|
java.lang.String |
getRawFragment()
Returns the raw fragment component of this URI.
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java.lang.String |
getRawPath()
Returns the raw path component of this URI.
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java.lang.String |
getRawQuery()
Returns the raw query component of this URI.
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java.lang.String |
getRawSchemeSpecificPart()
Returns the raw scheme-specific part of this URI.
|
java.lang.String |
getRawUserInfo()
Returns the raw user-information component of this URI.
|
java.lang.String |
getScheme()
Returns the scheme component of this URI.
|
java.lang.String |
getSchemeSpecificPart()
Returns the decoded scheme-specific part of this URI.
|
java.lang.String |
getUserInfo()
Returns the decoded user-information component of this URI.
|
int |
hashCode()
Returns a hash-code value for this URI.
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boolean |
isAbsolute()
Tells whether or not this URI is absolute.
|
boolean |
isOpaque()
Tells whether or not this URI is opaque.
|
VFSURI |
normalize()
Normalizes this URI's path.
|
VFSURI |
parseServerAuthority()
Attempts to parse this URI's authority component, if defined, into
user-information, host, and port components.
|
VFSURI |
relativize(VFSURI uri)
Relativizes the given URI against this URI.
|
VFSURI |
resolve(java.lang.String str)
Constructs a new URI by parsing the given string and then resolving it
against this URI.
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VFSURI |
resolve(VFSURI uri)
Resolves the given URI against this URI.
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void |
setFileType(org.apache.commons.vfs2.FileType type)
Setter for the VFS type (file, folder, ...).
|
java.lang.String |
toASCIIString()
Returns the content of this URI as a US-ASCII string.
|
java.lang.String |
toString()
Returns the content of this URI as a string.
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java.net.URL |
toURL()
Constructs a URL from this URI.
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public VFSURI()
I18NExtractor
).
public VFSURI(java.lang.String str) throws java.net.URISyntaxException
This constructor parses the given string exactly as specified by the grammar in RFC 2396, Appendix A, except for the following deviations:
An empty authority component is permitted as long as it is followed by a non-empty path, a query component, or a fragment component. This allows the parsing of URIs such as "file:///foo/bar", which seems to be the intent of RFC 2396 although the grammar does not permit it. If the authority component is empty then the user-information, host, and port components are undefined.
Empty relative paths are permitted; this seems to be the intent of RFC 2396 although the grammar does not permit it. The primary consequence of this deviation is that a standalone fragment such as "#foo" parses as a relative URI with an empty path and the given fragment, and can be usefully resolved against a base URI.
IPv4 addresses in host components are parsed rigorously, as specified by RFC 2732: Each element of a dotted-quad address must contain no more than three decimal digits. Each element is further constrained to have a value no greater than 255.
Hostnames in host components that comprise only a single domain label are permitted to start with an alphanum character. This seems to be the intent of RFC 2396 section 3.2.2 although the grammar does not permit it. The consequence of this deviation is that the authority component of a hierarchical URI such as s://123, will parse as a server-based authority.
IPv6 addresses are permitted for the host component. An IPv6 address must be enclosed in square brackets ('[' and ']') as specified by RFC 2732. The IPv6 address itself must parse according to RFC 2373. IPv6 addresses are further constrained to describe no more than sixteen bytes of address information, a constraint implicit in RFC 2373 but not expressible in the grammar.
Characters in the other category are permitted wherever RFC 2396 permits escaped octets, that is, in the user-information, path, query, and fragment components, as well as in the authority component if the authority is registry-based. This allows URIs to contain Unicode characters beyond those in the US-ASCII character set.
str
- The string to be parsed into a URIjava.lang.NullPointerException
- If str is nulljava.net.URISyntaxException
- If the given string violates RFC 2396, as augmented
by the above deviationspublic VFSURI(java.lang.String scheme, java.lang.String userInfo, java.lang.String host, int port, java.lang.String path, java.lang.String query, java.lang.String fragment) throws java.net.URISyntaxException
If a scheme is given then the path, if also given, must either be empty or begin with a slash character ('/'). Otherwise a component of the new URI may be left undefined by passing null for the corresponding parameter or, in the case of the port parameter, by passing -1.
This constructor first builds a URI string from the given components according to the rules specified in RFC 2396, section 5.2, step 7:
Initially, the result string is empty.
If a scheme is given then it is appended to the result, followed by a colon character (':').
If user information, a host, or a port are given then the string "//" is appended.
If user information is given then it is appended, followed by a commercial-at character ('@'). Any character not in the unreserved, punct, escaped, or other categories is quoted.
If a host is given then it is appended. If the host is a literal IPv6 address but is not enclosed in square brackets ('[' and ']') then the square brackets are added.
If a port number is given then a colon character (':') is appended, followed by the port number in decimal.
If a path is given then it is appended. Any character not in the unreserved, punct, escaped, or other categories, and not equal to the slash character ('/') or the commercial-at character ('@'), is quoted.
If a query is given then a question-mark character ('?') is appended, followed by the query. Any character that is not a legal URI character is quoted.
Finally, if a fragment is given then a hash character ('#') is appended, followed by the fragment. Any character that is not a legal URI character is quoted.
The resulting URI string is then parsed as if by invoking the VFSURI(String)
constructor and then invoking the parseServerAuthority()
method upon the result; this may cause a URISyntaxException
to be thrown.
scheme
- Scheme nameuserInfo
- User name and authorization informationhost
- Host nameport
- Port numberpath
- Pathquery
- Queryfragment
- Fragmentjava.net.URISyntaxException
- If both a scheme and a path are given but the path is relative,
if the URI string constructed from the given components violates
RFC 2396, or if the authority component of the string is
present but cannot be parsed as a server-based authoritypublic VFSURI(java.lang.String scheme, java.lang.String authority, java.lang.String path, java.lang.String query, java.lang.String fragment) throws java.net.URISyntaxException
If a scheme is given then the path, if also given, must either be empty or begin with a slash character ('/'). Otherwise a component of the new URI may be left undefined by passing null for the corresponding parameter.
This constructor first builds a URI string from the given components according to the rules specified in RFC 2396, section 5.2, step 7:
Initially, the result string is empty.
If a scheme is given then it is appended to the result, followed by a colon character (':').
If an authority is given then the string "//" is appended, followed by the authority. If the authority contains a literal IPv6 address then the address must be enclosed in square brackets ('[' and ']'). Any character not in the unreserved, punct, escaped, or other categories, and not equal to the commercial-at character ('@'), is quoted.
If a path is given then it is appended. Any character not in the unreserved, punct, escaped, or other categories, and not equal to the slash character ('/') or the commercial-at character ('@'), is quoted.
If a query is given then a question-mark character ('?') is appended, followed by the query. Any character that is not a legal URI character is quoted.
Finally, if a fragment is given then a hash character ('#') is appended, followed by the fragment. Any character that is not a legal URI character is quoted.
The resulting URI string is then parsed as if by invoking the VFSURI(String)
constructor and then invoking the parseServerAuthority()
method upon the result; this may cause a URISyntaxException
to be thrown.
scheme
- Scheme nameauthority
- Authoritypath
- Pathquery
- Queryfragment
- Fragmentjava.net.URISyntaxException
- If both a scheme and a path are given but the path is relative,
if the URI string constructed from the given components violates
RFC 2396, or if the authority component of the string is
present but cannot be parsed as a server-based authoritypublic VFSURI(java.lang.String scheme, java.lang.String host, java.lang.String path, java.lang.String fragment) throws java.net.URISyntaxException
A component may be left undefined by passing null.
This convenience constructor works as if by invoking the seven-argument constructor as follows:
new URI
(scheme, null, host, -1, path, null, fragment);
scheme
- Scheme namehost
- Host namepath
- Pathfragment
- Fragmentjava.net.URISyntaxException
- If the URI string constructed from the given components
violates RFC 2396public VFSURI(java.lang.String scheme, java.lang.String ssp, java.lang.String fragment) throws java.net.URISyntaxException
A component may be left undefined by passing null.
This constructor first builds a URI in string form using the given components as follows:
Initially, the result string is empty.
If a scheme is given then it is appended to the result, followed by a colon character (':').
If a scheme-specific part is given then it is appended. Any character that is not a legal URI character is quoted.
Finally, if a fragment is given then a hash character ('#') is appended to the string, followed by the fragment. Any character that is not a legal URI character is quoted.
The resulting URI string is then parsed in order to create the new
URI instance as if by invoking the VFSURI(String)
constructor;
this may cause a URISyntaxException
to be thrown.
scheme
- Scheme namessp
- Scheme-specific partfragment
- Fragmentjava.net.URISyntaxException
- If the URI string constructed from the given components
violates RFC 2396public static VFSURI create(java.lang.String str)
This convenience factory method works as if by invoking the VFSURI(String)
constructor; any URISyntaxException
thrown by the
constructor is caught and wrapped in a new IllegalArgumentException
object, which is then thrown.
This method is provided for use in situations where it is known that
the given string is a legal URI, for example for URI constants declared
within in a program, and so it would be considered a programming error
for the string not to parse as such. The constructors, which throw
URISyntaxException
directly, should be used situations where a
URI is being constructed from user input or from some other source that
may be prone to errors.
str
- The string to be parsed into a URIjava.lang.NullPointerException
- If str is nulljava.lang.IllegalArgumentException
- If the given string violates RFC 2396public VFSURI parseServerAuthority() throws java.net.URISyntaxException
If this URI's authority component has already been recognized as being server-based then it will already have been parsed into user-information, host, and port components. In this case, or if this URI has no authority component, this method simply returns this URI.
Otherwise this method attempts once more to parse the authority component into user-information, host, and port components, and throws an exception describing why the authority component could not be parsed in that way.
This method is provided because the generic URI syntax specified in RFC 2396 cannot always distinguish a malformed server-based authority from a legitimate registry-based authority. It must therefore treat some instances of the former as instances of the latter. The authority component in the URI string "//foo:bar", for example, is not a legal server-based authority but it is legal as a registry-based authority.
In many common situations, for example when working URIs that are known to be either URNs or URLs, the hierarchical URIs being used will always be server-based. They therefore must either be parsed as such or treated as an error. In these cases a statement such as
URI u = new URI(str).parseServerAuthority();
can be used to ensure that u always refers to a URI that, if it has an authority component, has a server-based authority with proper user-information, host, and port components. Invoking this method also ensures that if the authority could not be parsed in that way then an appropriate diagnostic message can be issued based upon the exception that is thrown.
java.net.URISyntaxException
- If the authority component of this URI is defined
but cannot be parsed as a server-based authority
according to RFC 2396public VFSURI normalize()
If this URI is opaque, or if its path is already in normal form, then this URI is returned. Otherwise a new URI is constructed that is identical to this URI except that its path is computed by normalizing this URI's path in a manner consistent with RFC 2396, section 5.2, step 6, sub-steps c through f; that is:
All "." segments are removed.
If a ".." segment is preceded by a non-".." segment then both of these segments are removed. This step is repeated until it is no longer applicable.
If the path is relative, and if its first segment contains a colon character (':'), then a "." segment is prepended. This prevents a relative URI with a path such as "a:b/c/d" from later being re-parsed as an opaque URI with a scheme of "a" and a scheme-specific part of "b/c/d". (Deviation from RFC 2396)
A normalized path will begin with one or more ".." segments if there were insufficient non-".." segments preceding them to allow their removal. A normalized path will begin with a "." segment if one was inserted by step 3 above. Otherwise, a normalized path will not contain any "." or ".." segments.
public VFSURI resolve(VFSURI uri)
If the given URI is already absolute, or if this URI is opaque, then the given URI is returned.
If the given URI's fragment component is defined, its path component is empty, and its scheme, authority, and query components are undefined, then a URI with the given fragment but with all other components equal to those of this URI is returned. This allows a URI representing a standalone fragment reference, such as "#foo", to be usefully resolved against a base URI.
Otherwise this method constructs a new hierarchical URI in a manner consistent with RFC 2396, section 5.2; that is:
A new URI is constructed with this URI's scheme and the given URI's query and fragment components.
If the given URI has an authority component then the new URI's authority and path are taken from the given URI.
Otherwise the new URI's authority component is copied from this URI, and its path is computed as follows:
If the given URI's path is absolute then the new URI's path is taken from the given URI.
Otherwise the given URI's path is relative, and so the new
URI's path is computed by resolving the path of the given URI
against the path of this URI. This is done by concatenating all but
the last segment of this URI's path, if any, with the given URI's
path and then normalizing the result as if by invoking the normalize
method.
The result of this method is absolute if, and only if, either this URI is absolute or the given URI is absolute.
uri
- The URI to be resolved against this URIjava.lang.NullPointerException
- If uri is nullpublic VFSURI resolve(java.lang.String str)
This convenience method works as if invoking it were equivalent to
evaluating the expression resolve
(URI.create
(str)).
str
- The string to be parsed into a URIjava.lang.NullPointerException
- If str is nulljava.lang.IllegalArgumentException
- If the given string violates RFC 2396public VFSURI relativize(VFSURI uri)
The relativization of the given URI against this URI is computed as follows:
If either this URI or the given URI are opaque, or if the scheme and authority components of the two URIs are not identical, or if the path of this URI is not a prefix of the path of the given URI, then the given URI is returned.
Otherwise a new relative hierarchical URI is constructed with query and fragment components taken from the given URI and with a path component computed by removing this URI's path from the beginning of the given URI's path.
uri
- The URI to be relativized against this URIjava.lang.NullPointerException
- If uri is nullpublic java.net.URL toURL() throws java.net.MalformedURLException
This convenience method works as if invoking it were equivalent to evaluating the expression new URL(this.toString()) after first checking that this URI is absolute.
java.lang.IllegalArgumentException
- If this URL is not absolutejava.net.MalformedURLException
- If a protocol handler for the URL could not be found,
or if some other error occurred while constructing the URLpublic java.lang.String getScheme()
The scheme component of a URI, if defined, only contains characters in the alphanum category and in the string "-.+". A scheme always starts with an alpha character.
The scheme component of a URI cannot contain escaped octets, hence this method does not perform any decoding.
public boolean isAbsolute()
A URI is absolute if, and only if, it has a scheme component.
public boolean isOpaque()
A URI is opaque if, and only if, it is absolute and its scheme-specific part does not begin with a slash character ('/'). An opaque URI has a scheme, a scheme-specific part, and possibly a fragment; all other components are undefined.
public java.lang.String getRawSchemeSpecificPart()
The scheme-specific part of a URI only contains legal URI characters.
public java.lang.String getSchemeSpecificPart()
The string returned by this method is equal to that returned by the
getRawSchemeSpecificPart
method
except that all sequences of escaped octets are decoded.
public java.lang.String getRawAuthority()
The authority component of a URI, if defined, only contains the commercial-at character ('@') and characters in the unreserved, punct, escaped, and other categories. If the authority is server-based then it is further constrained to have valid user-information, host, and port components.
public java.lang.String getAuthority()
The string returned by this method is equal to that returned by the
getRawAuthority
method except that all
sequences of escaped octets are decoded.
public java.lang.String getRawUserInfo()
The user-information component of a URI, if defined, only contains characters in the unreserved, punct, escaped, and other categories.
public java.lang.String getUserInfo()
The string returned by this method is equal to that returned by the
getRawUserInfo
method except that all
sequences of escaped octets are decoded.
public java.lang.String getHost()
The host component of a URI, if defined, will have one of the following forms:
A domain name consisting of one or more labels separated by period characters ('.'), optionally followed by a period character. Each label consists of alphanum characters as well as hyphen characters ('-'), though hyphens never occur as the first or last characters in a label. The rightmost label of a domain name consisting of two or more labels, begins with an alpha character.
A dotted-quad IPv4 address of the form digit+.digit+.digit+.digit+, where no digit sequence is longer than three characters and no sequence has a value larger than 255.
An IPv6 address enclosed in square brackets ('[' and ']') and consisting of hexadecimal digits, colon characters (':'), and possibly an embedded IPv4 address. The full syntax of IPv6 addresses is specified in RFC 2373: IPv6 Addressing Architecture.
public int getPort()
The port component of a URI, if defined, is a non-negative integer.
public java.lang.String getRawPath()
The path component of a URI, if defined, only contains the slash character ('/'), the commercial-at character ('@'), and characters in the unreserved, punct, escaped, and other categories.
public java.lang.String getPath()
The string returned by this method is equal to that returned by the
getRawPath
method except that all sequences of
escaped octets are decoded.
public java.lang.String getRawQuery()
The query component of a URI, if defined, only contains legal URI characters.
public java.lang.String getQuery()
The string returned by this method is equal to that returned by the
getRawQuery
method except that all sequences of
escaped octets are decoded.
public java.lang.String getRawFragment()
The fragment component of a URI, if defined, only contains legal URI characters.
public java.lang.String getFragment()
The string returned by this method is equal to that returned by the
getRawFragment
method except that all
sequences of escaped octets are decoded.
public boolean equals(java.lang.Object ob)
If the given object is not a URI then this method immediately returns false.
For two URIs to be considered equal requires that either both are opaque or both are hierarchical. Their schemes must either both be undefined or else be equal without regard to case. Their fragments must either both be undefined or else be equal.
For two opaque URIs to be considered equal, their scheme-specific parts must be equal.
For two hierarchical URIs to be considered equal, their paths must be equal and their queries must either both be undefined or else be equal. Their authorities must either both be undefined, or both be registry-based, or both be server-based. If their authorities are defined and are registry-based, then they must be equal. If their authorities are defined and are server-based, then their hosts must be equal without regard to case, their port numbers must be equal, and their user-information components must be equal.
When testing the user-information, path, query, fragment, authority, or scheme-specific parts of two URIs for equality, the raw forms rather than the encoded forms of these components are compared and the hexadecimal digits of escaped octets are compared without regard to case.
This method satisfies the general contract of the Object.equals
method.
equals
in class java.lang.Object
ob
- The object to which this object is to be comparedpublic int hashCode()
Object.hashCode
method.hashCode
in class java.lang.Object
public int compareTo(VFSURI that)
When comparing corresponding components of two URIs, if one
component is undefined but the other is defined then the first is
considered to be less than the second. Unless otherwise noted, string
components are ordered according to their natural, case-sensitive
ordering as defined by the String.compareTo
method. String components that are subject to
encoding are compared by comparing their raw forms rather than their
encoded forms.
The ordering of URIs is defined as follows:
Two URIs with different schemes are ordered according the ordering of their schemes, without regard to case.
A hierarchical URI is considered to be less than an opaque URI with an identical scheme.
Two opaque URIs with identical schemes are ordered according to the ordering of their scheme-specific parts.
Two opaque URIs with identical schemes and scheme-specific parts are ordered according to the ordering of their fragments.
Two hierarchical URIs with identical schemes are ordered according to the ordering of their authority components:
If both authority components are server-based then the URIs are ordered according to their user-information components; if these components are identical then the URIs are ordered according to the ordering of their hosts, without regard to case; if the hosts are identical then the URIs are ordered according to the ordering of their ports.
If one or both authority components are registry-based then the URIs are ordered according to the ordering of their authority components.
Finally, two hierarchical URIs with identical schemes and authority components are ordered according to the ordering of their paths; if their paths are identical then they are ordered according to the ordering of their queries; if the queries are identical then they are ordered according to the order of their fragments.
This method satisfies the general contract of the Comparable.compareTo
method.
compareTo
in interface java.lang.Comparable<VFSURI>
that
- The object to which this URI is to be comparedjava.lang.ClassCastException
- If the given object is not a URIpublic java.lang.String toString()
If this URI was created by invoking one of the constructors in this class then a string equivalent to the original input string, or to the string computed from the originally-given components, as appropriate, is returned. Otherwise this URI was created by normalization, resolution, or relativization, and so a string is constructed from this URI's components according to the rules specified in RFC 2396, section 5.2, step 7.
toString
in class java.lang.Object
public java.lang.String toASCIIString()
If this URI does not contain any characters in the other
category then an invocation of this method will return the same value as
an invocation of the toString
method. Otherwise
this method works as if by invoking that method and then encoding the result.
public void setFileType(org.apache.commons.vfs2.FileType type)
type
- The VFS type (optional)public org.apache.commons.vfs2.FileType getFileType()
Copyright © 2005-2014 Leisenfels UG. All rights reserved.