Package org.eclipse.compare

Class ZipFileStructureCreator

java.lang.Object
org.eclipse.compare.ZipFileStructureCreator
All Implemented Interfaces:
IStructureCreator
public class ZipFileStructureCreator extends Object implements IStructureCreator
This implementation of the IStructureCreator interface makes the contents of a zip archive available as a hierarchical structure of IStructureComparators.

It is used when comparing the internal structure of a zip archive.

Since:
2.0

  • Constructor Details

    • ZipFileStructureCreator

      public ZipFileStructureCreator()
      Create a new ZipFileStructureCreator.

    • ZipFileStructureCreator

      public ZipFileStructureCreator(String title)
      Create a new ZipFileStructureCreator with the given title. The title is returned by the method getName().
      Parameters:
      title - the title of this structure creator

  • Method Details

    • getName

      public String getName()
      Description copied from interface: IStructureCreator
      Returns a descriptive name which can be used in the UI of the StructureDiffViewer.
      Specified by:
      getName in interface IStructureCreator
      Returns:
      a descriptive name for this IStructureCreator

    • getStructure

      public IStructureComparator getStructure(Object input)
      Description copied from interface: IStructureCreator
      Creates a tree structure consisting of IStructureComparators from the given object and returns its root object. Implementing this method typically involves parsing the input object. In case of an error (e.g. a parsing error) the value null is returned.
      Specified by:
      getStructure in interface IStructureCreator
      Parameters:
      input - the object from which to create the tree of IStructureComparator
      Returns:
      the root node of the structure or null in case of error

    • getContents

      public String getContents(Object o, boolean ignoreWhitespace)
      Description copied from interface: IStructureCreator
      Returns the contents of the given node as a string for the purpose of performing a content comparison only (that is the string will not be visible in the UI). If ignoreWhitespace is true all character sequences considered whitespace should be removed from the returned string.
      Specified by:
      getContents in interface IStructureCreator
      Parameters:
      o - the node for which to return a string representation
      ignoreWhitespace - if true the returned string should not contain whitespace
      Returns:
      the string contents of the given node

    • canSave

      public boolean canSave()
      Returns false since we cannot update a zip archive.
      Returns:
      false

    • save

      public void save(IStructureComparator structure, Object input)
      Called whenever a copy operation has been performed on a tree node. This implementation throws an AssertionFailedException since we cannot update a zip archive.
      Specified by:
      save in interface IStructureCreator
      Parameters:
      structure - the node for which to save the new content
      input - the object from which the structure tree was created in getStructure

    • locate

      public IStructureComparator locate(Object path, Object source)
      Description copied from interface: IStructureCreator
      Creates the single node specified by path from the given input object. In case of an error (e.g. a parsing error) the value null is returned. This method is similar to getStructure but in contrast to getStructure only a single node without any children must be returned. This method is used in the ReplaceWithEditionDialog to locate a sub element (e.g. a method) within an input object (e.g. a file containing source code).

      One (not optimized) approach to implement this method is calling getStructure(input) to build the full tree, and then finding that node within the tree that is specified by path.

      The syntax of path is not specified, because it is treated by the compare subsystem as an opaque entity and is not further interpreted. Clients using this functionality will pass a value of path to the selectEdition method of ReplaceWithEditionDialog and will receive this value unchanged as an argument to locate.

      Specified by:
      locate in interface IStructureCreator
      Parameters:
      path - specifies a sub object within the input object
      source - the object from which to create the IStructureComparator
      Returns:
      the single node specified by path or null

    • canRewriteTree

      public boolean canRewriteTree()
      Returns false since this IStructureCreator cannot rewrite the diff tree in order to fold certain combinations of additions and deletions.

      Note: this method is for internal use only. Clients should not call this method.

      Returns:
      false

    • rewriteTree

      public void rewriteTree(Differencer differencer, IDiffContainer root)
      Empty implementation since this IStructureCreator cannot rewrite the diff tree in order to fold certain combinations of additions and deletions.

      Note: this method is for internal use only. Clients should not call this method.

      Parameters:
      differencer - the differencer used to rewrite
      root - the root to rewrite