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LocatorImpl (Java 2 Platform SE 5.0) - JDK 5 Documentation v1.5.0, Java 2 SDK 英文文档

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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

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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.

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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)

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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)

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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)

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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()

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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()

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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()

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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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For further API reference and developer documentation, see Java 2 SDK SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.

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