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This is the master POM file for Oracle's Implementation of the JSF 2.2 Specification.
There is a newer version: 2.4.0
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package com.sun.faces.facelets.compiler;

import com.sun.faces.RIConstants;
import javax.faces.component.UIComponent;
import javax.faces.view.facelets.FaceletContext;
import javax.faces.view.facelets.FaceletHandler;
import java.io.IOException;
import java.util.Map;
import javax.faces.context.FacesContext;

public class EncodingHandler implements FaceletHandler {

    private final FaceletHandler next;
    private final String encoding;
    private final CompilationMessageHolder messageHolder;
    
    public EncodingHandler(FaceletHandler next, String encoding,
            CompilationMessageHolder messageHolder) {
        this.next = next;
        this.encoding = encoding;
        this.messageHolder = messageHolder;
    }

    @Override
    public void apply(FaceletContext ctx, UIComponent parent)
            throws IOException {
        FacesContext context = ctx.getFacesContext();
        Map ctxAttributes = context.getAttributes();
        ctxAttributes.put("facelets.compilationMessages", this.messageHolder);
        this.next.apply(ctx, parent);
        ctxAttributes.remove("facelets.compilationMessages");
        this.messageHolder.processCompilationMessages(ctx.getFacesContext());
        if (!ctxAttributes.containsKey(RIConstants.FACELETS_ENCODING_KEY)) {
            ctx.getFacesContext().getAttributes().put(RIConstants.FACELETS_ENCODING_KEY, this.encoding);
        }
    }
    
    public static CompilationMessageHolder getCompilationMessageHolder(FaceletContext ctx) {

        return (CompilationMessageHolder) ctx.getFacesContext().getAttributes().get("facelets.compilationMessages");

    }

}