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/*
* $Id: SerializableLocatorImpl.java,v 1.8 2010-11-01 04:34:52 joehw Exp $
*/
package com.sun.org.apache.xml.internal.utils;
/**
* The standard SAX implementation of LocatorImpl is not serializable,
* limiting its utility as "a persistent snapshot of a locator".
* This is a quick hack to make it so. Note that it makes more sense
* in many cases to set up fields to hold this data rather than pointing
* at another object... but that decision should be made on architectural
* grounds rather than serializability.
*
* It isn't clear whether subclassing LocatorImpl and adding serialization
* methods makes more sense than copying it and just adding Serializable
* to its interface. Since it's so simple, I've taken the latter approach
* for now.
*
* @see org.xml.sax.helpers.LocatorImpl
* @see org.xml.sax.Locator Locator
* @since XalanJ2
* @author Joe Kesselman
* @version 1.0
*/
public class SerializableLocatorImpl
implements org.xml.sax.Locator, java.io.Serializable
{
static final long serialVersionUID = -2660312888446371460L;
/**
* Zero-argument constructor.
*
*
SAX says "This will not normally be useful, since the main purpose
* of this class is to make a snapshot of an existing Locator." In fact,
* it _is_ sometimes useful when you want to construct a new Locator
* pointing to a specific location... which, after all, is why the
* setter methods are provided.
*
*/
public SerializableLocatorImpl ()
{
}
/**
* 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).
*
* @param locator The locator to copy.
*/
public SerializableLocatorImpl (org.xml.sax.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.
*
* @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.
*
* @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).
*
* @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).
*
* @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.
*
* @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.
*
* @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).
*
* @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).
*
* @param columnNumber The column number, or -1 if none is available.
* @see #getColumnNumber
*/
public void setColumnNumber (int columnNumber)
{
this.columnNumber = columnNumber;
}
////////////////////////////////////////////////////////////////////
// Internal state.
////////////////////////////////////////////////////////////////////
/**
* The public ID.
* @serial
*/
private String publicId;
/**
* The system ID.
* @serial
*/
private String systemId;
/**
* The line number.
* @serial
*/
private int lineNumber;
/**
* The column number.
* @serial
*/
private int columnNumber;
}
// end of LocatorImpl.java