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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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package com.sun.xml.internal.fastinfoset.sax;

import com.sun.xml.internal.fastinfoset.EncodingConstants;
import com.sun.xml.internal.fastinfoset.QualifiedName;
import com.sun.xml.internal.fastinfoset.util.KeyIntMap;
import com.sun.xml.internal.fastinfoset.util.LocalNameQualifiedNamesMap;
import com.sun.xml.internal.fastinfoset.util.StringIntMap;
import java.io.IOException;
import java.util.HashMap;
import org.xml.sax.SAXException;
import java.util.Map;
import com.sun.xml.internal.org.jvnet.fastinfoset.FastInfosetException;
import com.sun.xml.internal.org.jvnet.fastinfoset.RestrictedAlphabet;
import com.sun.xml.internal.org.jvnet.fastinfoset.sax.EncodingAlgorithmAttributes;
import org.xml.sax.Attributes;

The Fast Infoset SAX serializer that maps prefixes to user specified prefixes
that are specified in a namespace URI to prefix map.

This serializer will not preserve the original prefixes and this serializer
should not be used when prefixes need to be preserved, such as the case
when there are qualified names in content.

A namespace URI to prefix map is utilized such that the prefixes
in the map are utilized rather than the prefixes specified in
the qualified name for elements and attributes.

Any namespace declarations with a namespace URI that is not present in
the map are added.

/**
 * The Fast Infoset SAX serializer that maps prefixes to user specified prefixes
 * that are specified in a namespace URI to prefix map.
 * <p>
 * This serializer will not preserve the original prefixes and this serializer
 * should not be used when prefixes need to be preserved, such as the case
 * when there are qualified names in content.
 * <p>
 * A namespace URI to prefix map is utilized such that the prefixes
 * in the map are utilized rather than the prefixes specified in
 * the qualified name for elements and attributes.
 * <p>
 * Any namespace declarations with a namespace URI that is not present in
 * the map are added.
 * <p>
 */
public class SAXDocumentSerializerWithPrefixMapping extends SAXDocumentSerializer {
    protected Map _namespaceToPrefixMapping;
    protected Map _prefixToPrefixMapping;
    protected String _lastCheckedNamespace;
    protected String _lastCheckedPrefix;

    protected StringIntMap _declaredNamespaces;

    public SAXDocumentSerializerWithPrefixMapping(Map namespaceToPrefixMapping) {
        // Use the local name to look up elements/attributes
        super(true);
        _namespaceToPrefixMapping = new HashMap(namespaceToPrefixMapping);
        _prefixToPrefixMapping = new HashMap();

        // Empty prefix
        _namespaceToPrefixMapping.put("", "");
        // 'xml' prefix
        _namespaceToPrefixMapping.put(EncodingConstants.XML_NAMESPACE_NAME, EncodingConstants.XML_NAMESPACE_PREFIX);

        _declaredNamespaces = new StringIntMap(4);
    }

    public final void startPrefixMapping(String prefix, String uri) throws SAXException {
        try {
            if (_elementHasNamespaces == false) {
                encodeTermination();

                // Mark the current buffer position to flag attributes if necessary
                mark();
                _elementHasNamespaces = true;

                // Write out Element byte with namespaces
                write(EncodingConstants.ELEMENT | EncodingConstants.ELEMENT_NAMESPACES_FLAG);

                _declaredNamespaces.clear();
                _declaredNamespaces.obtainIndex(uri);
            } else {
                if (_declaredNamespaces.obtainIndex(uri) != KeyIntMap.NOT_PRESENT) {
                    final String p = getPrefix(uri);
                    if (p != null) {
                        _prefixToPrefixMapping.put(prefix, p);
                    }
                    return;
                }
            }

            final String p = getPrefix(uri);
            if (p != null) {
                encodeNamespaceAttribute(p, uri);
                _prefixToPrefixMapping.put(prefix, p);
            } else {
                putPrefix(uri, prefix);
                encodeNamespaceAttribute(prefix, uri);
            }

        } catch (IOException e) {
            throw new SAXException("startElement", e);
        }
    }

    protected final void encodeElement(String namespaceURI, String qName, String localName) throws IOException {
        LocalNameQualifiedNamesMap.Entry entry = _v.elementName.obtainEntry(localName);
        if (entry._valueIndex > 0) {
            if (encodeElementMapEntry(entry, namespaceURI)) return;
            // Check the entry is a member of the read only map
            if (_v.elementName.isQNameFromReadOnlyMap(entry._value[0])) {
                entry = _v.elementName.obtainDynamicEntry(localName);
                if (entry._valueIndex > 0) {
                    if (encodeElementMapEntry(entry, namespaceURI)) return;
                }
            }
        }

        encodeLiteralElementQualifiedNameOnThirdBit(namespaceURI, getPrefix(namespaceURI),
                localName, entry);
    }

    protected boolean encodeElementMapEntry(LocalNameQualifiedNamesMap.Entry entry, String namespaceURI) throws IOException {
        QualifiedName[] names = entry._value;
        for (int i = 0; i < entry._valueIndex; i++) {
            if ((namespaceURI == names[i].namespaceName || namespaceURI.equals(names[i].namespaceName))) {
                encodeNonZeroIntegerOnThirdBit(names[i].index);
                return true;
            }
        }
        return false;
    }


    protected final void encodeAttributes(Attributes atts) throws IOException, FastInfosetException {
        boolean addToTable;
        boolean mustToBeAddedToTable;
        String value;
        if (atts instanceof EncodingAlgorithmAttributes) {
            final EncodingAlgorithmAttributes eAtts = (EncodingAlgorithmAttributes)atts;
            Object data;
            String alphabet;
            for (int i = 0; i < eAtts.getLength(); i++) {
                final String uri = atts.getURI(i);
                if (encodeAttribute(uri, atts.getQName(i), atts.getLocalName(i))) {
                    data = eAtts.getAlgorithmData(i);
                    // If data is null then there is no algorithm data
                    if (data == null) {
                        value = eAtts.getValue(i);
                        addToTable = isAttributeValueLengthMatchesLimit(value.length());
                        mustToBeAddedToTable = eAtts.getToIndex(i);
                        alphabet = eAtts.getAlpababet(i);
                        if (alphabet == null) {
                            if (uri == "http://www.w3.org/2001/XMLSchema-instance" ||
                                    uri.equals("http://www.w3.org/2001/XMLSchema-instance")) {
                                value = convertQName(value);
                            }
                            encodeNonIdentifyingStringOnFirstBit(value, _v.attributeValue, addToTable, mustToBeAddedToTable);
                        } else if (alphabet == RestrictedAlphabet.DATE_TIME_CHARACTERS) {
                            encodeDateTimeNonIdentifyingStringOnFirstBit(
                                    value, addToTable, mustToBeAddedToTable);
                        } else if (alphabet == RestrictedAlphabet.NUMERIC_CHARACTERS) {
                            encodeNumericNonIdentifyingStringOnFirstBit(
                                    value, addToTable, mustToBeAddedToTable);
                        } else {
                            encodeNonIdentifyingStringOnFirstBit(value, _v.attributeValue, addToTable, mustToBeAddedToTable);
                        }
                    } else {
                        encodeNonIdentifyingStringOnFirstBit(eAtts.getAlgorithmURI(i),
                                eAtts.getAlgorithmIndex(i), data);
                    }
                }
            }
        } else {
            for (int i = 0; i < atts.getLength(); i++) {
                final String uri = atts.getURI(i);
                if (encodeAttribute(atts.getURI(i), atts.getQName(i), atts.getLocalName(i))) {
                    value = atts.getValue(i);
                    addToTable = isAttributeValueLengthMatchesLimit(value.length());

                    if (uri == "http://www.w3.org/2001/XMLSchema-instance" ||
                            uri.equals("http://www.w3.org/2001/XMLSchema-instance")) {
                        value = convertQName(value);
                    }
                    encodeNonIdentifyingStringOnFirstBit(value, _v.attributeValue, addToTable, false);
                }
            }
        }
        _b = EncodingConstants.TERMINATOR;
        _terminate = true;
    }

    private String convertQName(String qName) {
        int i = qName.indexOf(':');
        String prefix = "";
        String localName = qName;
        if (i != -1) {
            prefix = qName.substring(0, i);
            localName = qName.substring(i + 1);
        }

        String p = (String)_prefixToPrefixMapping.get(prefix);
        if (p != null) {
            if (p.length() == 0)
                return localName;
            else
                return p + ":" + localName;
        } else {
            return qName;
        }
    }

    protected final boolean encodeAttribute(String namespaceURI, String qName, String localName) throws IOException {
        LocalNameQualifiedNamesMap.Entry entry = _v.attributeName.obtainEntry(localName);
        if (entry._valueIndex > 0) {
            if (encodeAttributeMapEntry(entry, namespaceURI)) return true;
            // Check the entry is a member of the read only map
            if (_v.attributeName.isQNameFromReadOnlyMap(entry._value[0])) {
                entry = _v.attributeName.obtainDynamicEntry(localName);
                if (entry._valueIndex > 0) {
                    if (encodeAttributeMapEntry(entry, namespaceURI)) return true;
                }
            }
        }

        return encodeLiteralAttributeQualifiedNameOnSecondBit(namespaceURI, getPrefix(namespaceURI),
                localName, entry);
    }

    protected boolean encodeAttributeMapEntry(LocalNameQualifiedNamesMap.Entry entry, String namespaceURI) throws IOException {
        QualifiedName[] names = entry._value;
        for (int i = 0; i < entry._valueIndex; i++) {
            if ((namespaceURI == names[i].namespaceName || namespaceURI.equals(names[i].namespaceName))) {
                encodeNonZeroIntegerOnSecondBitFirstBitZero(names[i].index);
                return true;
            }
        }
        return false;
    }

    protected final String getPrefix(String namespaceURI) {
        if (_lastCheckedNamespace == namespaceURI) return _lastCheckedPrefix;

        _lastCheckedNamespace = namespaceURI;
        return _lastCheckedPrefix = (String)_namespaceToPrefixMapping.get(namespaceURI);
    }

    protected final void putPrefix(String namespaceURI, String prefix) {
        _namespaceToPrefixMapping.put(namespaceURI, prefix);

        _lastCheckedNamespace = namespaceURI;
        _lastCheckedPrefix = prefix;
    }
}