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package com.sun.faces.facelets.compiler;
import com.sun.faces.facelets.el.CompositeFunctionMapper;
import com.sun.faces.facelets.tag.TagLibrary;
import com.sun.faces.el.ELContextImpl;
import javax.el.FunctionMapper;
import javax.el.ELContext;
import javax.faces.component.UIComponent;
import javax.faces.view.facelets.FaceletContext;
import javax.faces.view.facelets.FaceletHandler;
import javax.faces.context.FacesContext;
import java.io.IOException;
import java.lang.reflect.Method;
import java.util.Map;
final class NamespaceHandler extends FunctionMapper implements FaceletHandler {
private final TagLibrary library;
private final Map ns;
private FaceletHandler next;
public NamespaceHandler(FaceletHandler next, TagLibrary library, Map ns) {
this.library = library;
this.ns = ns;
this.next = next;
}
public void apply(FaceletContext ctx, UIComponent parent)
throws IOException {
FunctionMapper orig = ctx.getFunctionMapper();
pushMapper(ctx.getFacesContext(), this);
ctx.setFunctionMapper(new CompositeFunctionMapper(this, orig));
try {
next.apply(ctx, parent);
} finally {
ctx.setFunctionMapper(orig);
}
}
public Method resolveFunction(String prefix, String localName) {
String uri = (String) this.ns.get(prefix);
if (uri != null) {
return this.library.createFunction(uri, localName);
}
return null;
}
// --------------------------------------------------------- Private Methods
private void pushMapper(FacesContext ctx, FunctionMapper mapper) {
ELContext elContext = ctx.getELContext();
if (elContext instanceof ELContextImpl) {
((ELContextImpl) elContext).setFunctionMapper(mapper);
}
}
}