Creates a new dependency information object that contains the dependencies specified in the argument.

Indicates whether some other object is "equal to" this one.

The equals method implements an equivalence relation on non-null object references:

• It is reflexive: for any non-null reference value x, x.equals(x) should return true.
• It is symmetric: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
• It is transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
• It is consistent: for any non-null reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the objects is modified.
• For any non-null reference value x, x.equals(null) should return false.

The equals method for class Object implements the most discriminating possible equivalence relation on objects; that is, for any non-null reference values x and y, this method returns true if and only if x and y refer to the same object (x == y has the value true).

Note that it is generally necessary to override the hashCode method whenever this method is overridden, so as to maintain the general contract for the hashCode method, which states that equal objects must have equal hash codes.

Creates a new dependency information by filtering the dependencies in this instance.

The arugment transformation function will be called for all dependency present in this instance. The function may modify or omit the dependency passed to it.

If the function returns null, the passed dependency will not be part of the result. In other cases, the returned dependency list will be added to the result.

Gets the dependencies in this information.

The keys in the returned map will have no version qualifiers.

Gets the dependency list for the argument bundle identifier.

Checks if this information contains any optional dependencies.

Returns a hash code value for the object. This method is supported for the benefit of hash tables such as those provided by HashMap.

The general contract of hashCode is:

• Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
• If two objects are equal according to the equals(Object) method, then calling the hashCode method on each of the two objects must produce the same integer result.
• It is not required that if two objects are unequal according to the Object.equals(Object) method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.

As much as is reasonably practical, the hashCode method defined by class Object does return distinct integers for distinct objects. (This is typically implemented by converting the internal address of the object into an integer, but this implementation technique is not required by the Java™ programming language.)

Checks if this information has any dependencies.

The object implements the readExternal method to restore its contents by calling the methods of DataInput for primitive types and readObject for objects, strings and arrays. The readExternal method must read the values in the same sequence and with the same types as were written by writeExternal.

Parses the bundle dependencies from the argument input stream in the format defined by this function.

The dependencies are declared in 3 levels of white-space indented lines.

The first level contains the name of the bundle identifier that the dependency is declared on:

 my.bundle
     ...
 second.dependency.bundle-q1-q2
     ....
 

The bundle identifiers may contain qualifiers, but no meta-qualifiers. Each bundle identifier may only occurr once. All dependency information for a bundle is written in the block following the bundle identifier.

In each indented block, the indentation characters must be the same. You can use one or more tabs or spaces, but make sure to use the same indentation throughout an indented block.

A dependency on a bundle consists of one or multiple dependency kinds, a version range, and optional meta-data:

 my.bundle
     classpath: 1.0
     kind2, kind3,, kind4: [0)
 

The above shows two dependency declarations. The kind classpath is applied with the version range of 1.0. The dependency with kinds kind2, kind3, kind4 is applied with the version range of [0).

A dependency declaration syntax consists of a dependency kind and version range separated by a colon character (:). Multiple kinds can be present separated by commas. Extraneous commas are ignored.

In the above, both dependency declarations are indented with 4 spaces. As mentioned above, this must stay consistend in a given block.

Dependency meta-datas can be declared for a given declaration:

 my.bundle
     classpath: 1.0
         optional: true
         meta2: custom-value
         with-spaces: hello world
         empty:
         quoted: "123"
         quoted: ""word""
         multi-line: "1
 2"
         eol-quote-escape: "1"\
 2"
         slash: \
         slash-in-str: "\"
 

There's two way the value of a meta-data declaration can be specified. As simple unquoted characters, or in quotes. Without any quotation, the value will be considered to start from the colon (:) and last until the end of the line. Any white-space will be trimmed from it.

With quotes, the contents of the meta-data value will be all the characters until the first quote that is found at the end of a line. Intermediate quotes don't need to be escaped. If the value needs to have quotes at the end of a line and still continue, the backslash (\) character needs to be appended to continue parsing the value.

See the following for multi-line escaping examples:

 meta1: "1st
 2nd"
 
 meta2: "some"intermediate
 "quoted"
 
 meta3: "quotes
 at"\
 line\\
 end"
 

In the above, the meta-data entries will be the following, with new lines as \n:

• meta1: 1st\n2nd
• meta2: some"intermediate\n"quoted
• meta3: quotes\nat"\nline\\nend

If a backslash character is found at the end of a line in a multi-line quoted string value, then it will be omitted by the parser. Line endings are normalized to \n.

As a convenience feature, the parser allows version ranges to contain the this identifier. If found, then it will be substituted by the version number of the declaring bundle identifier parameter (if any) for dependencies that have the same name as the declaring bundle.

E.g. if the declaring bundle is my.bundle-v1.0 then the following:

 my.bundle-q1
     classpath: [this]
 

Will be parsed as if it was the following:

 my.bundle-q1
     classpath: [1.0]
 

Note that the this identifier will not be substituted if it is declared on a dependency that doesn't have the same name as the declaring bundle. The following will result in a parsing error:

 other.bundle
     classpath: [this]
 

The error occurs as other.bundle has a different name than my.bundle.

Returns a string representation of the object. In general, the toString method returns a string that "textually represents" this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method.

The toString method for class Object returns a string consisting of the name of the class of which the object is an instance, the at-sign character `@', and the unsigned hexadecimal representation of the hash code of the object. In other words, this method returns a string equal to the value of:

 getClass().getName() + '@' + Integer.toHexString(hashCode())
 

Gets a dependency information object that contains the same dependencies as this, but without the optional dependencies.

The object implements the writeExternal method to save its contents by calling the methods of DataOutput for its primitive values or calling the writeObject method of ObjectOutput for objects, strings, and arrays.

Writes this dependency information to the argument output stream in the format specified by readFrom(InputStream, BundleIdentifier).