package client.net.sf.saxon.ce.trace;
import java.util.ArrayList;
import client.net.sf.saxon.ce.expr.Expression;
import client.net.sf.saxon.ce.expr.Literal;
import client.net.sf.saxon.ce.expr.StaticContext;
import client.net.sf.saxon.ce.expr.TraceExpression;
import client.net.sf.saxon.ce.expr.instruct.ResultDocument;
import client.net.sf.saxon.ce.expr.parser.CodeInjector;
import client.net.sf.saxon.ce.om.StandardNames;
import client.net.sf.saxon.ce.om.StructuredQName;
/**
* A code injector that wraps every expression (other than a literal) in a TraceExpression, which causes
* a TraceListener to be notified when the expression is evaluated
*/
public class TraceCodeInjector implements CodeInjector {
/**
* If tracing, wrap an expression in a trace instruction
*
* @param exp the expression to be wrapped
* @param env the static context
* @param construct integer constant identifying the kind of construct
* @param qName the name of the construct (if applicable)
* @return the expression that does the tracing
*/
public Expression inject(Expression exp, /*@NotNull*/ StaticContext env, int construct, StructuredQName qName) {
if (exp instanceof Literal) {
return exp;
}
TraceExpression trace = new TraceExpression(exp);
//ExpressionTool.copyLocationInfo(exp, trace);
trace.setNamespaceResolver(env.getNamespaceResolver());
trace.setConstructType(construct);
trace.setObjectName(qName);
ArrayList<String[]> properties = exp.getTraceProperties();
if (properties != null) {
for (String[] property: properties) {
trace.setProperty(property[0], property[1]);
}
}
//trace.setObjectNameCode(objectNameCode);
return trace;
}
/**
* If tracing, add a clause to a FLWOR expression that can be used to monitor requests for
* tuples to be processed
* @param target the clause whose evaluation is to be traced (or otherwise monitored)
* @param env the static context of the containing FLWOR expression
* @param container the container of the containing FLWOR Expression
* @return the new clause to do the tracing; or null if no tracing is required at this point
*/
//public Clause injectClause(Clause target, StaticContext env, Container container) {
// return new TraceClause(target, env.getNamespaceResolver(), container);
//}
}
// 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.