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## org.apache.xalan.xpath.xml
Interface ProblemListener

All Known Implementing Classes:
  ProblemListenerDefault

public interface ProblemListener

This is the interface that the XSL processor calls when it has a problem of some kind, either an error or a warning. Users should ass the XSLTEngineImpl class to setProblemListener if they wish an object instance to be called when a problem event occurs.

Field Summary
`static short` | `ERROR`
`static short` | `MESSAGE`
`static short` | `QUERYENGINE`
`static short` | `WARNING`
`static short` | `XMLPARSER`
`static short` | `XPATHPARSER`
`static short` | `XPATHPROCESSOR`
`static short` | `XSLPROCESSOR`

Method Summary
`boolean` | `message(java.lang.String msg)` Function that is called to issue a message.
`boolean` | `problem(short where, short classification, java.lang.Object styleNode, org.w3c.dom.Node sourceNode, java.lang.String msg, java.lang.String id, int lineNo, int charOffset)` Function that is called when a problem event occurs.

Field Detail

### WARNING

    public static final short WARNING

### ERROR

    public static final short ERROR

### MESSAGE

    public static final short MESSAGE

### XMLPARSER

    public static final short XMLPARSER

### XSLPROCESSOR

    public static final short XSLPROCESSOR

### QUERYENGINE

    public static final short QUERYENGINE

### XPATHPROCESSOR

    public static final short XPATHPROCESSOR

### XPATHPARSER

    public static final short XPATHPARSER

Method Detail

### problem

    public boolean problem(short where,
                           short classification,
                           java.lang.Object styleNode,
                           org.w3c.dom.Node sourceNode,
                           java.lang.String msg,
                           java.lang.String id,
                           int lineNo,
                           int charOffset)

  Function that is called when a problem event occurs.
  Parameters:
    `where` - Either and XMLPARSER, XSLPROCESSOR, or QUERYENGINE.
    `classification` - Either ERROR or WARNING.
    `styleNode` - The style tree node where the problem occurred. May be null.
    `sourceNode` - The source tree node where the problem occurred. May be null.
    `msg` - A string message explaining the problem.
    `lineNo` - The line number where the problem occurred, if it is known. May be zero.
    `charOffset` - The character offset where the problem, occurred if it is known. May be zero.
  Returns:
    true if the return is an ERROR, in which case exception will be thrown. Otherwise the processor will continue to process.

### message

    public boolean message(java.lang.String msg)

  Function that is called to issue a message.
  Parameters:
    `msg` - A string message to output.

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