com.opensymphony.xwork2.util.location

## Class LocationAttributes

- java.lang.Object
- - com.opensymphony.xwork2.util.location.LocationAttributes

-     public class LocationAttributes
      extends Object

  A class to handle location information stored in attributes. These attributes are typically setup using `LocationAttributes.Pipe` which augments the SAX stream with additional attributes, e.g.:

       <root xmlns:loc="http://struts.apache.org/xwork/location"
             loc:src="file://path/to/file.xml"
             loc:line="1" loc:column="1">
         <foo loc:src="file://path/to/file.xml" loc:line="2" loc:column="3"/>
       </root>

  Since:
    2.1.8
  See Also:
    `LocationAttributes.Pipe`

- - ### Nested Class Summary

    Nested Classes
    Modifier and Type | Class and Description
    --- | ---
    `static class` | `LocationAttributes.Pipe` A SAX filter that adds the information available from the `Locator` as attributes.

  - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static String` | `COL_ATTR` Attribute name for the column number
    `static String` | `LINE_ATTR` Attribute name for the line number
    `static String` | `PREFIX` Prefix for the location namespace
    `static String` | `Q_COL_ATTR` Attribute qualified name for the column number
    `static String` | `Q_LINE_ATTR` Attribute qualified name for the line number
    `static String` | `Q_SRC_ATTR` Attribute qualified name for the location URI
    `static String` | `SRC_ATTR` Attribute name for the location URI
    `static String` | `URI` Namespace URI for location attributes

  - ### Method Summary

    All Methods Static Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `static Attributes` | `addLocationAttributes(Locator locator, Attributes attrs)` Add location attributes to a set of SAX attributes.
    `static int` | `getColumn(Attributes attrs)` Returns the column number of an element (SAX flavor)
    `static int` | `getColumn(Element elem)` Returns the column number of an element (DOM flavor)
    `static int` | `getLine(Attributes attrs)` Returns the line number of an element (SAX flavor)
    `static int` | `getLine(Element elem)` Returns the line number of an element (DOM flavor)
    `static Location` | `getLocation(Attributes attrs, String description)` Returns the `Location` of an element (SAX flavor).
    `static Location` | `getLocation(Element elem)` Same as `getLocation(elem, null)`.
    `static Location` | `getLocation(Element elem, String description)` Returns the `Location` of an element (DOM flavor).
    `static String` | `getLocationString(Attributes attrs)` Returns the location of an element (SAX flavor).
    `static String` | `getLocationString(Element elem)` Returns the location of an element that has been processed by this pipe (DOM flavor).
    `static String` | `getURI(Attributes attrs)` Returns the URI of an element (SAX flavor)
    `static String` | `getURI(Element elem)` Returns the URI of an element (DOM flavor)
    `static void` | `remove(Element elem, boolean recurse)` Remove the location attributes from a DOM element.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Field Detail

    - #### PREFIX

          public static final String PREFIX

      Prefix for the location namespace
      See Also:
        Constant Field Values

    - #### URI

          public static final String URI

      Namespace URI for location attributes
      See Also:
        Constant Field Values

    - #### SRC_ATTR

          public static final String SRC_ATTR

      Attribute name for the location URI
      See Also:
        Constant Field Values

    - #### LINE_ATTR

          public static final String LINE_ATTR

      Attribute name for the line number
      See Also:
        Constant Field Values

    - #### COL_ATTR

          public static final String COL_ATTR

      Attribute name for the column number
      See Also:
        Constant Field Values

    - #### Q_SRC_ATTR

          public static final String Q_SRC_ATTR

      Attribute qualified name for the location URI
      See Also:
        Constant Field Values

    - #### Q_LINE_ATTR

          public static final String Q_LINE_ATTR

      Attribute qualified name for the line number
      See Also:
        Constant Field Values

    - #### Q_COL_ATTR

          public static final String Q_COL_ATTR

      Attribute qualified name for the column number
      See Also:
        Constant Field Values

  - ### Method Detail

    - #### addLocationAttributes

          public static Attributes addLocationAttributes(Locator locator,
                                                         Attributes attrs)

      Add location attributes to a set of SAX attributes.
      Parameters:
        `locator` - the `Locator` (can be null)
        `attrs` - the `Attributes` where locator information should be added
      Returns:
        Location enabled Attributes.

    - #### getLocation

          public static Location getLocation(Attributes attrs,
                                             String description)

      Returns the `Location` of an element (SAX flavor).
      Parameters:
        `attrs` - the element's attributes that hold the location information
        `description` - a description for the location (can be null)
      Returns:
        a `Location` object

    - #### getLocationString

          public static String getLocationString(Attributes attrs)

      Returns the location of an element (SAX flavor). If the location is to be kept into an object built from this element, consider using `getLocation(Attributes, String)` and the `Locatable` interface.
      Parameters:
        `attrs` - the element's attributes that hold the location information
      Returns:
        a location string as defined by `Location`.

    - #### getURI

          public static String getURI(Attributes attrs)

      Returns the URI of an element (SAX flavor)
      Parameters:
        `attrs` - the element's attributes that hold the location information
      Returns:
        the element's URI or "`[unknown location]`" if `attrs` has no location information.

    - #### getLine

          public static int getLine(Attributes attrs)

      Returns the line number of an element (SAX flavor)
      Parameters:
        `attrs` - the element's attributes that hold the location information
      Returns:
        the element's line number or `-1` if `attrs` has no location information.

    - #### getColumn

          public static int getColumn(Attributes attrs)

      Returns the column number of an element (SAX flavor)
      Parameters:
        `attrs` - the element's attributes that hold the location information
      Returns:
        the element's column number or `-1` if `attrs` has no location information.

    - #### getLocation

          public static Location getLocation(Element elem,
                                             String description)

      Returns the `Location` of an element (DOM flavor).
      Parameters:
        `elem` - the element that holds the location information
        `description` - a description for the location (if `null`, the element's name is used)
      Returns:
        a `Location` object

    - #### getLocation

          public static Location getLocation(Element elem)

      Same as `getLocation(elem, null)`.
      Parameters:
        `elem` - the element that holds the location information
      Returns:
        a `Location` object

    - #### getLocationString

          public static String getLocationString(Element elem)

      Returns the location of an element that has been processed by this pipe (DOM flavor). If the location is to be kept into an object built from this element, consider using `getLocation(Element)` and the `Locatable` interface.
      Parameters:
        `elem` - the element that holds the location information
      Returns:
        a location string as defined by `Location`.

    - #### getURI

          public static String getURI(Element elem)

      Returns the URI of an element (DOM flavor)
      Parameters:
        `elem` - the element that holds the location information
      Returns:
        the element's URI or "`[unknown location]`" if `elem` has no location information.

    - #### getLine

          public static int getLine(Element elem)

      Returns the line number of an element (DOM flavor)
      Parameters:
        `elem` - the element that holds the location information
      Returns:
        the element's line number or `-1` if `elem` has no location information.

    - #### getColumn

          public static int getColumn(Element elem)

      Returns the column number of an element (DOM flavor)
      Parameters:
        `elem` - the element that holds the location information
      Returns:
        the element's column number or `-1` if `elem` has no location information.

    - #### remove

          public static void remove(Element elem,
                                    boolean recurse)

      Remove the location attributes from a DOM element.
      Parameters:
        `elem` - the element to remove the location attributes from.
        `recurse` - if `true`, also remove location attributes on descendant elements.

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