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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * accompanied this code).
 *
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package org.xml.sax.helpers;

import org.xml.sax.Locator;



Provide an optional convenience implementation of Locator.

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.


Author:David Megginson
See Also:
Since:1.4, SAX 1.0
/**
 * Provide an optional convenience implementation of Locator.
 *
 * <p>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:</p>
 *
 * <pre>
 * 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);
 * }
 *</pre>
 *
 * <p>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.</p>
 *
 * @since 1.4, SAX 1.0
 * @author David Megginson
 * @see org.xml.sax.Locator Locator
 */
public class LocatorImpl implements Locator
{


    
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.


/**
     * Zero-argument constructor.
     *
     * <p>This will not normally be useful, since the main purpose
     * of this class is to make a snapshot of an existing Locator.</p>
     */
    public LocatorImpl ()
    {
    }


    
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).


Params:
  • locator – The locator to copy.
/**
     * Copy constructor.
     *
     * <p>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).</p>
     *
     * @param locator The locator to copy.
     */
    public LocatorImpl (Locator locator)
    {
        setPublicId(locator.getPublicId());
        setSystemId(locator.getSystemId());
        setLineNumber(locator.getLineNumber());
        setColumnNumber(locator.getColumnNumber());
    }



    ////////////////////////////////////////////////////////////////////
    // Implementation of org.xml.sax.Locator
    ////////////////////////////////////////////////////////////////////


    
Return the saved public identifier.

See Also:
Returns:The public identifier as a string, or null if none
        is available.
/**
     * Return the saved public identifier.
     *
     * @return The public identifier as a string, or null if none
     *         is available.
     * @see org.xml.sax.Locator#getPublicId
     * @see #setPublicId
     */
    public String getPublicId ()
    {
        return publicId;
    }


    
Return the saved system identifier.

See Also:
Returns:The system identifier as a string, or null if none
        is available.
/**
     * Return the saved system identifier.
     *
     * @return The system identifier as a string, or null if none
     *         is available.
     * @see org.xml.sax.Locator#getSystemId
     * @see #setSystemId
     */
    public String getSystemId ()
    {
        return systemId;
    }


    
Return the saved line number (1-based).

See Also:
Returns:The line number as an integer, or -1 if none is available.
/**
     * Return the saved line number (1-based).
     *
     * @return The line number as an integer, or -1 if none is available.
     * @see org.xml.sax.Locator#getLineNumber
     * @see #setLineNumber
     */
    public int getLineNumber ()
    {
        return lineNumber;
    }


    
Return the saved column number (1-based).

See Also:
Returns:The column number as an integer, or -1 if none is available.
/**
     * Return the saved column number (1-based).
     *
     * @return The column number as an integer, or -1 if none is available.
     * @see org.xml.sax.Locator#getColumnNumber
     * @see #setColumnNumber
     */
    public int getColumnNumber ()
    {
        return columnNumber;
    }



    ////////////////////////////////////////////////////////////////////
    // Setters for the properties (not in org.xml.sax.Locator)
    ////////////////////////////////////////////////////////////////////


    
Set the public identifier for this locator.

Params:
  • publicId – The new public identifier, or null
       if none is available.
See Also:
/**
     * Set the public identifier for this locator.
     *
     * @param publicId The new public identifier, or null
     *        if none is available.
     * @see #getPublicId
     */
    public void setPublicId (String publicId)
    {
        this.publicId = publicId;
    }


    
Set the system identifier for this locator.

Params:
  • systemId – The new system identifier, or null
       if none is available.
See Also:
/**
     * Set the system identifier for this locator.
     *
     * @param systemId The new system identifier, or null
     *        if none is available.
     * @see #getSystemId
     */
    public void setSystemId (String systemId)
    {
        this.systemId = systemId;
    }


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

Params:
  • lineNumber – The line number, or -1 if none is available.
See Also:
/**
     * Set the line number for this locator (1-based).
     *
     * @param lineNumber The line number, or -1 if none is available.
     * @see #getLineNumber
     */
    public void setLineNumber (int lineNumber)
    {
        this.lineNumber = lineNumber;
    }


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

Params:
  • columnNumber – The column number, or -1 if none is available.
See Also:
/**
     * Set the column number for this locator (1-based).
     *
     * @param columnNumber The column number, or -1 if none is available.
     * @see #getColumnNumber
     */
    public void setColumnNumber (int columnNumber)
    {
        this.columnNumber = columnNumber;
    }



    ////////////////////////////////////////////////////////////////////
    // Internal state.
    ////////////////////////////////////////////////////////////////////

    private String publicId;
    private String systemId;
    private int lineNumber;
    private int columnNumber;

}

// end of LocatorImpl.java