net.sf.saxon.expr.flwor.ClauseInfo Maven / Gradle / Ivy
Show all versions of Saxon-HE Show documentation
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2018-2022 Saxonica Limited
// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
// If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
// This Source Code Form is "Incompatible With Secondary Licenses", as defined by the Mozilla Public License, v. 2.0.
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
package net.sf.saxon.expr.flwor;
import net.sf.saxon.s9api.Location;
import net.sf.saxon.om.NamespaceResolver;
import net.sf.saxon.om.StructuredQName;
import net.sf.saxon.trace.Traceable;
/**
* A "trace" clause in a FLWOR expression, added by a TraceCodeInjector
*/
public class ClauseInfo implements Traceable {
private final Clause clause;
private NamespaceResolver nsResolver;
public ClauseInfo(Clause clause) {
this.clause = clause;
}
/**
* Get the clause being traced
*
* @return the clause in the FLWOR expression to which this ClauseInfo relates
*/
public Clause getClause() {
return clause;
}
@Override
public Location getLocation() {
return clause.getLocation();
}
/**
* Get a name identifying the object of the expression, for example a function name, template name,
* variable name, key name, element name, etc. This is used only where the name is known statically.
*
* @return the QName of the object declared or manipulated by this instruction or expression
*/
@Override
public StructuredQName getObjectName() {
LocalVariableBinding[] vars = clause.getRangeVariables();
if (vars != null && vars.length > 0) {
return vars[0].getVariableQName();
} else {
return null;
}
}
/**
* Get the namespace bindings from the static context of the clause
*
* @return a namespace resolver that reflects the in scope namespaces of the clause
*/
public NamespaceResolver getNamespaceResolver() {
return nsResolver;
}
/**
* Set the namespace bindings from the static context of the clause
*
* @param nsResolver a namespace resolver that reflects the in scope namespaces of the clause
*/
public void setNamespaceResolver(NamespaceResolver nsResolver) {
this.nsResolver = nsResolver;
}
/**
* Get the system identifier (URI) of the source stylesheet or query module containing
* the instruction. This will generally be an absolute URI. If the system
* identifier is not known, the method may return null. In some cases, for example
* where XML external entities are used, the correct system identifier is not
* always retained.
*
* @return the URI of the containing module
*/
public String getSystemId() {
return clause.getLocation().getSystemId();
}
/**
* Get the line number of the instruction in the source stylesheet module.
* If this is not known, or if the instruction is an artificial one that does
* not relate to anything in the source code, the value returned may be -1.
*
* @return the line number of the expression within the containing module
*/
public int getLineNumber() {
return clause.getLocation().getLineNumber();
}
/**
* Return the public identifier for the current document event.
* The return value is the public identifier of the document
* entity or of the external parsed entity in which the markup
* triggering the event appears.
*
* @return A string containing the public identifier, or
* null if none is available.
* @see #getSystemId
*/
public String getPublicId() {
return null;
}
/**
* Return the column number where the current document event ends.
* This is one-based number of Java char values since
* the last line end.
* Warning: The return value from the method
* is intended only as an approximation for the sake of diagnostics;
* it is not intended to provide sufficient information
* to edit the character content of the original XML document.
* For example, when lines contain combining character sequences, wide
* characters, surrogate pairs, or bi-directional text, the value may
* not correspond to the column in a text editor's display.
* The return value is an approximation of the column number
* in the document entity or external parsed entity where the
* markup triggering the event appears.
* If possible, the SAX driver should provide the line position
* of the first character after the text associated with the document
* event. The first column in each line is column 1.
*
* @return The column number, or -1 if none is available.
* @see #getLineNumber
*/
public int getColumnNumber() {
return -1;
}
}