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/*
 * Copyright (c) 1997, 2022 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Distribution License v. 1.0, which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

package com.sun.xml.ws.api.message;

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import jakarta.xml.soap.MimeHeader;
import jakarta.xml.soap.MimeHeaders;
import jakarta.xml.soap.SOAPMessage;
import javax.xml.transform.Source;
import jakarta.xml.ws.WebServiceFeature;
import jakarta.xml.ws.soap.MTOMFeature;

import com.oracle.webservices.api.EnvelopeStyle;
import com.oracle.webservices.api.EnvelopeStyleFeature;
import com.oracle.webservices.api.message.MessageContext;
import com.sun.xml.ws.api.SOAPVersion;
import com.sun.xml.ws.api.WSFeatureList;
import com.sun.xml.ws.api.pipe.Codec;
import com.sun.xml.ws.api.pipe.Codecs;

/**
 * The MessageContextFactory implements com.oracle.webservices.api.message.MessageContextFactory as
 * a factory of Packet and public facade of Codec(s).
 * 
 * @author [email protected]
 */
public class MessageContextFactory extends com.oracle.webservices.api.message.MessageContextFactory {
    
    private WSFeatureList features;
    private Codec soapCodec;
    private Codec xmlCodec;
    private EnvelopeStyleFeature envelopeStyle;
    private EnvelopeStyle.Style singleSoapStyle;
    
    public MessageContextFactory(WebServiceFeature[] wsf) {
        this(new com.sun.xml.ws.binding.WebServiceFeatureList(wsf));
    }
    
    public MessageContextFactory(WSFeatureList wsf) {
        features = wsf;
        envelopeStyle = features.get(EnvelopeStyleFeature.class);
        if (envelopeStyle == null) {//Default to SOAP11
            envelopeStyle = new EnvelopeStyleFeature(EnvelopeStyle.Style.SOAP11);
            features.mergeFeatures(new WebServiceFeature[]{envelopeStyle}, false);
        }
        for (EnvelopeStyle.Style s : envelopeStyle.getStyles()) {
            if (s.isXML()) {
                if (xmlCodec == null) xmlCodec = Codecs.createXMLCodec(features); 
            } else {
                if (soapCodec == null) soapCodec = Codecs.createSOAPBindingCodec(features);  
                singleSoapStyle = s;
            }
        }
    }

    @Override
    protected com.oracle.webservices.api.message.MessageContextFactory newFactory(WebServiceFeature... f) {
        return new com.sun.xml.ws.api.message.MessageContextFactory(f);
    }


    @Override
    public com.oracle.webservices.api.message.MessageContext createContext() {
        return packet(null);
    }

    @Override
    public com.oracle.webservices.api.message.MessageContext createContext(SOAPMessage soap) {
        throwIfIllegalMessageArgument(soap);
        if (saajFactory!= null) return packet(saajFactory.createMessage(soap));
        return packet(Messages.create(soap));
    }

    @Override
    public MessageContext createContext(Source m, com.oracle.webservices.api.EnvelopeStyle.Style envelopeStyle) {
        throwIfIllegalMessageArgument(m);
        return packet(Messages.create(m, SOAPVersion.from(envelopeStyle)));
    }

    @Override
    public com.oracle.webservices.api.message.MessageContext createContext(Source m) {
        throwIfIllegalMessageArgument(m);
        return packet(Messages.create(m, SOAPVersion.from(singleSoapStyle)));
    }
    
    @Override
    public com.oracle.webservices.api.message.MessageContext createContext(InputStream in, String contentType) throws IOException {
        throwIfIllegalMessageArgument(in);
        //TODO when do we use xmlCodec?
        Packet p = packet(null);
        soapCodec.decode(in, contentType, p);
        return p;
    }

    static String getHeader(MimeHeaders headers, String name) {
        String[] values = headers.getHeader(name);
        return (values != null && values.length > 0) ? values[0] : null;
    }
   
    static Map> toMap(MimeHeaders headers) {
        HashMap> map = new HashMap<>();
        for (Iterator i = headers.getAllHeaders(); i.hasNext();) {
            MimeHeader mh = i.next();
            List values = map.computeIfAbsent(mh.getName(), k -> new ArrayList<>());
            values.add(mh.getValue());
        }       
        return map;
    }
    
    public MessageContext createContext(Message m) {
        throwIfIllegalMessageArgument(m);
        return packet(m);
    }
    
    private Packet packet(Message m) {
        final Packet p = new Packet();
        //TODO when do we use xmlCodec?
        p.codec = soapCodec;
        if (m != null) p.setMessage(m);
        MTOMFeature mf = features.get(MTOMFeature.class);
        if (mf != null) {
            p.setMtomFeature(mf);
        }
        p.setSAAJFactory(saajFactory); 
        return p;
    }  

    private void throwIfIllegalMessageArgument(Object message)
        throws IllegalArgumentException
    {
        if (message == null) {
            throw new IllegalArgumentException("null messages are not allowed.  Consider using MessageContextFactory.createContext()");
        }
    }
}