org.apache.jasper.compiler.ScriptingVariabler Maven / Gradle / Ivy
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package org.apache.jasper.compiler;
import java.util.*;
import javax.servlet.jsp.tagext.*;
import org.apache.jasper.JasperException;
/**
* Class responsible for determining the scripting variables that every
* custom action needs to declare.
*
* @author Jan Luehe
*/
class ScriptingVariabler {
private static final Integer MAX_SCOPE = Integer.valueOf(Integer.MAX_VALUE);
/*
* Assigns an identifier (of type integer) to every custom tag, in order
* to help identify, for every custom tag, the scripting variables that it
* needs to declare.
*/
static class CustomTagCounter extends Node.Visitor {
private int count;
private Node.CustomTag parent;
public void visit(Node.CustomTag n) throws JasperException {
n.setCustomTagParent(parent);
Node.CustomTag tmpParent = parent;
parent = n;
visitBody(n);
parent = tmpParent;
n.setNumCount(Integer.valueOf(count++));
}
}
/*
* For every custom tag, determines the scripting variables it needs to
* declare.
*/
static class ScriptingVariableVisitor extends Node.Visitor {
private ErrorDispatcher err;
private HashMap scriptVars;
public ScriptingVariableVisitor(ErrorDispatcher err) {
this.err = err;
scriptVars = new HashMap();
}
public void visit(Node.CustomTag n) throws JasperException {
setScriptingVars(n, VariableInfo.AT_BEGIN);
setScriptingVars(n, VariableInfo.NESTED);
visitBody(n);
setScriptingVars(n, VariableInfo.AT_END);
}
private void setScriptingVars(Node.CustomTag n, int scope)
throws JasperException {
TagVariableInfo[] tagVarInfos = n.getTagVariableInfos();
VariableInfo[] varInfos = n.getVariableInfos();
if (tagVarInfos.length == 0 && varInfos.length == 0) {
return;
}
ArrayList