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/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2017 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
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 * exception as provided by Oracle in the GPL Version 2 section of the License
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 *
 * Modifications:
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 * only the GPL Version 2, indicate your decision by adding "[Contributor]
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 * Version 2] license."  If you don't indicate a single choice of license, a
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package com.sun.faces.facelets.compiler;


import com.sun.faces.facelets.el.ELText;

import javax.el.ELContext;
import javax.el.ELException;
import javax.el.ExpressionFactory;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import java.io.IOException;

final class TextInstruction implements Instruction {
    private final ELText txt;
    
    private final String alias;

    public TextInstruction(String alias, ELText txt) {
        this.alias = alias;
        this.txt = txt;
    }

    @Override
    public void write(FacesContext context) throws IOException {
        ResponseWriter out = context.getResponseWriter();
        try {
            ELContext elContext = context.getELContext();
            txt.writeText(out, elContext);
            //out.writeText(txt.toString(elContext), null);
        } catch (ELException e) {
            throw new ELException(this.alias + ": " + e.getMessage(), e.getCause());
        } catch (IOException e) {
            throw new ELException(this.alias + ": " + e.getMessage(), e);
        }
    }


    @Override
    public Instruction apply(ExpressionFactory factory, ELContext ctx) {
        ELText nt = this.txt.apply(factory, ctx);
        if (nt == this.txt) {
            return this;
        }

        return new TextInstruction(alias, nt);
    }

    @Override
    public boolean isLiteral() {
        return txt.isLiteral();
    }
}