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## org.xml.sax.helpers
Class LocatorImpl

    java.lang.Object
      org.xml.sax.helpers.LocatorImpl

All Implemented Interfaces:
  Locator

Direct Known Subclasses:
  Locator2Impl

    public class LocatorImpl

extends Object
implements Locator

Provide an optional convenience implementation of Locator.

> This module, both source code and documentation, is in the Public Domain, and comes with NO WARRANTY. See http://www.saxproject.org for further information.

This class is available mainly for application writers, who can use it to make a persistent snapshot of a locator at any point during a document parse:

     Locator locator;
     Locator startloc;

     public void setLocator (Locator locator)
     {
             // note the locator
       this.locator = locator;
     }

     public void startDocument ()
     {
             // save the location of the start of the document
             // for future use.
       Locator startloc = new LocatorImpl(locator);
     }

Normally, parser writers will not use this class, since it is more efficient to provide location information only when requested, rather than constantly updating a Locator object.

Since:
  SAX 1.0
See Also:
  `Locator`

Constructor Summary
`LocatorImpl()` Zero-argument constructor.
`LocatorImpl(Locator locator)` Copy constructor.

Method Summary
`int` | `getColumnNumber()` Return the saved column number (1-based).
`int` | `getLineNumber()` Return the saved line number (1-based).
`String` | `getPublicId()` Return the saved public identifier.
`String` | `getSystemId()` Return the saved system identifier.
`void` | `setColumnNumber(int columnNumber)` Set the column number for this locator (1-based).
`void` | `setLineNumber(int lineNumber)` Set the line number for this locator (1-based).
`void` | `setPublicId(String publicId)` Set the public identifier for this locator.
`void` | `setSystemId(String systemId)` Set the system identifier for this locator.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### LocatorImpl

    public LocatorImpl()

  Zero-argument constructor.

  This will not normally be useful, since the main purpose of this class is to make a snapshot of an existing Locator.

### LocatorImpl

    public LocatorImpl(Locator locator)

  Copy constructor.

  Create a persistent copy of the current state of a locator. When the original locator changes, this copy will still keep the original values (and it can be used outside the scope of DocumentHandler methods).

  Parameters:
    `locator` - The locator to copy.

Method Detail

### getPublicId

    public String getPublicId()

  Return the saved public identifier.

  Specified by:
    `getPublicId` in interface `Locator`
  Returns:
    The public identifier as a string, or null if none is available.
  See Also:
    `Locator.getPublicId()`, `setPublicId(java.lang.String)`

### getSystemId

    public String getSystemId()

  Return the saved system identifier.

  Specified by:
    `getSystemId` in interface `Locator`
  Returns:
    The system identifier as a string, or null if none is available.
  See Also:
    `Locator.getSystemId()`, `setSystemId(java.lang.String)`

### getLineNumber

    public int getLineNumber()

  Return the saved line number (1-based).

  Specified by:
    `getLineNumber` in interface `Locator`
  Returns:
    The line number as an integer, or -1 if none is available.
  See Also:
    `Locator.getLineNumber()`, `setLineNumber(int)`

### getColumnNumber

    public int getColumnNumber()

  Return the saved column number (1-based).

  Specified by:
    `getColumnNumber` in interface `Locator`
  Returns:
    The column number as an integer, or -1 if none is available.
  See Also:
    `Locator.getColumnNumber()`, `setColumnNumber(int)`

### setPublicId

    public void setPublicId(String publicId)

  Set the public identifier for this locator.

  Parameters:
    `publicId` - The new public identifier, or null if none is available.
  See Also:
    `getPublicId()`

### setSystemId

    public void setSystemId(String systemId)

  Set the system identifier for this locator.

  Parameters:
    `systemId` - The new system identifier, or null if none is available.
  See Also:
    `getSystemId()`

### setLineNumber

    public void setLineNumber(int lineNumber)

  Set the line number for this locator (1-based).

  Parameters:
    `lineNumber` - The line number, or -1 if none is available.
  See Also:
    `getLineNumber()`

### setColumnNumber

    public void setColumnNumber(int columnNumber)

  Set the column number for this locator (1-based).

  Parameters:
    `columnNumber` - The column number, or -1 if none is available.
  See Also:
    `getColumnNumber()`

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