Dépôt officiel du code source de l'ERP OpenConcerto

/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

 *

 * Copyright 2011 OpenConcerto, by ILM Informatique. All rights reserved.

 *

 * The contents of this file are subject to the terms of the GNU General Public License Version 3

 * only ("GPL"). You may not use this file except in compliance with the License. You can obtain a

 * copy of the License at http://www.gnu.org/licenses/gpl-3.0.html 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.

 */

 package org.openconcerto.openoffice;

import static org.openconcerto.openoffice.ODPackage.RootElement.CONTENT;

import static org.openconcerto.openoffice.ODPackage.RootElement.META;

import static org.openconcerto.openoffice.ODPackage.RootElement.STYLES;

import org.openconcerto.openoffice.spreadsheet.CellStyle;

import org.openconcerto.openoffice.spreadsheet.SpreadSheet;

import org.openconcerto.openoffice.style.data.DataStyle;

import org.openconcerto.openoffice.text.TextDocument;

import org.openconcerto.utils.CopyUtils;

import org.openconcerto.utils.ExceptionUtils;

import org.openconcerto.utils.FileUtils;

import org.openconcerto.utils.ProductInfo;

import org.openconcerto.utils.PropertiesUtils;

import org.openconcerto.utils.SetMap;

import org.openconcerto.utils.StreamUtils;

import org.openconcerto.utils.StringInputStream;

import org.openconcerto.utils.StringUtils;

import org.openconcerto.utils.Tuple2;

import org.openconcerto.utils.Tuple3;

import org.openconcerto.utils.Zip;

import org.openconcerto.utils.ZippedFilesProcessor;

import org.openconcerto.utils.cc.ITransformer;

import org.openconcerto.utils.io.DataInputStream;

import org.openconcerto.xml.JDOMUtils;

import org.openconcerto.xml.Validator;

import java.io.BufferedInputStream;

import java.io.BufferedOutputStream;

import java.io.ByteArrayInputStream;

import java.io.ByteArrayOutputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.InputStream;

import java.io.OutputStream;

import java.nio.charset.Charset;

import java.text.NumberFormat;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Collection;

import java.util.Collections;

import java.util.EnumSet;

import java.util.HashMap;

import java.util.HashSet;

import java.util.Iterator;

import java.util.List;

import java.util.Locale;

import java.util.Map;

import java.util.Map.Entry;

import java.util.Properties;

import java.util.Set;

import java.util.zip.ZipEntry;

import org.jdom.Attribute;

import org.jdom.DocType;

import org.jdom.Document;

import org.jdom.Element;

import org.jdom.JDOMException;

import org.jdom.Namespace;

import org.jdom.input.SAXBuilder;

import org.jdom.output.Format;

import org.jdom.output.XMLOutputter;

import net.jcip.annotations.GuardedBy;

/**

 * An OpenDocument package, ie a zip containing XML documents and their associated files.

 *

 * @author ILM Informatique 2 août 2004

 */

public class ODPackage {

    static final String MIMETYPE_ENTRY = "mimetype";

    /** Normally mimetype contains only ASCII characters */

    static final Charset MIMETYPE_ENC = Charset.forName("UTF-8");

    @GuardedBy("ODPackage")

    private static String PAGE_COUNT = null;

    /**

     * Allow to specify a fixed number of pages for all text documents. This provides a workaround

     * for LibreOffice 4.0.x on Ubuntu which takes a long time to open documents without statistics.

     * E.g. 40s for 35 pages but only 4s if the page count is 500 pages.

     *

     * @param count page count, negative means remove.

     */

    public static final synchronized void setPageCount(final int count) {

        if (count < 0)

            PAGE_COUNT = null;

        else

            PAGE_COUNT = String.valueOf(count);

    }

    public static final synchronized String getPageCount() {

        return PAGE_COUNT;

    }

    // not a constant since XMLOutputter isn't thread-safe

    static final XMLOutputter createOutputter() {

        // use raw format, otherwise spaces are added to every spreadsheet cell

        return new XMLOutputter(Format.getRawFormat());

    }

    /**

     * Root element of an OpenDocument document. See section 22.2.1 of v1.2-part1-cd04.

     *

     * @author Sylvain CUAZ

     */

    // full name needed for javac 1.6.0_45

    @net.jcip.annotations.Immutable

    public static enum RootElement {

        /** Contains the entire document, see 3.1.2 of OpenDocument-v1.2-part1-cd04 */

        SINGLE_CONTENT("office", "document", null),

        /** Document content and automatic styles used in the content, see 3.1.3.2 */

        CONTENT("office", "document-content", "content.xml"),

        // TODO uncomment and create ContentTypeVersioned for .odf and .otf, see 22.2.9 Conforming

        // OpenDocument Formula Document

        // MATH("math", "math", "content.xml"),

        /** Styles used in document content and automatic styles used in styles, see 3.1.3.3 */

        STYLES("office", "document-styles", "styles.xml"),

        /** Document metadata elements, see 3.1.3.4 */

        META("office", "document-meta", "meta.xml"),

        /** Implementation-specific settings, see 3.1.3.5 */

        SETTINGS("office", "document-settings", "settings.xml");

        public final static EnumSet<RootElement> getPackageElements() {

            return EnumSet.of(CONTENT, STYLES, META, SETTINGS);

        }

        public final static RootElement fromDocument(final Document doc) {

            return fromElementName(doc.getRootElement().getName());

        }

        public final static RootElement fromElementName(final String name) {

            for (final RootElement e : values()) {

                if (e.getElementName().equals(name))

                    return e;

            }

            return null;

        }

        static final Document createSingle(final Document from) {

            return SINGLE_CONTENT.createDocument(XMLFormatVersion.get(from));

        }

        private final String nsPrefix;

        private final String name;

        private final String zipEntry;

        private RootElement(String prefix, String rootName, String zipEntry) {

            this.nsPrefix = prefix;

            this.name = rootName;

            this.zipEntry = zipEntry;

        }

        public final String getElementNSPrefix() {

            return this.nsPrefix;

        }

        public final String getElementName() {

            return this.name;

        }

        public final Document createDocument(final XMLFormatVersion fv) {

            final XMLVersion version = fv.getXMLVersion();

            final Element root = new Element(getElementName(), version.getNS(getElementNSPrefix()));

            // 19.388 office:version identifies the version of ODF specification

            if (fv.getOfficeVersion() != null)

                root.setAttribute("version", fv.getOfficeVersion(), version.getOFFICE());

            // avoid declaring namespaces in each child

            for (final Namespace ns : version.getALL())

                root.addNamespaceDeclaration(ns);

            return new Document(root, createDocType(version));

        }

        public final DocType createDocType(final XMLVersion version) {

            // OpenDocument use relaxNG

            if (version == XMLVersion.OOo)

                return new DocType(getElementNSPrefix() + ":" + getElementName(), "-//OpenOffice.org//DTD OfficeDocument 1.0//EN", "office.dtd");

            else

                return null;

        }

        /**

         * The name of the zip entry in the package.

         *

         * @return the path of the file, <code>null</code> if this element shouldn't be in a

         *         package.

         */

        public final String getZipEntry() {

            return this.zipEntry;

        }

    }

    private static final Set<String> subdocNames;

    static {

        final Set<String> tmp = new HashSet<String>();

        for (final RootElement r : RootElement.getPackageElements())

            if (r.getZipEntry() != null)

                tmp.add(r.getZipEntry());

        subdocNames = Collections.unmodifiableSet(tmp);

    }

    /**

     * Whether the passed entry is specific to a package.

     *

     * @param name a entry name, eg "mimetype"

     * @return <code>true</code> if <code>name</code> is a standard file, eg <code>true</code>.

     */

    public static final boolean isStandardFile(final String name) {

        return name.equals(MIMETYPE_ENTRY) || subdocNames.contains(name) || name.startsWith("Thumbnails") || name.startsWith("META-INF") || name.startsWith("Configurations")

                || name.equals("layout-cache") || name.equals("manifest.rdf") || name.startsWith(Library.DIR_NAME) || name.startsWith(Library.DIALOG_DIR_NAME);

    }

    /**

     * Create a package from a collection of sub-documents.

     *

     * @param content the content.

     * @param style the styles, can be <code>null</code>.

     * @return a package containing the XML documents.

     */

    public static ODPackage createFromDocuments(Document content, Document style) {

        return createFromDocuments(null, content, style, null, null);

    }

    public static ODPackage createFromDocuments(final ContentTypeVersioned type, Document content, Document style, Document meta, Document settings) {

        final ODPackage pkg = new ODPackage();

        if (type != null)

            pkg.setContentType(type);

        pkg.putFile(RootElement.CONTENT.getZipEntry(), content);

        pkg.putFile(RootElement.STYLES.getZipEntry(), style);

        pkg.putFile(RootElement.META.getZipEntry(), meta);

        pkg.putFile(RootElement.SETTINGS.getZipEntry(), settings);

        return pkg;

    }

    /**

     * Read from the input stream into memory and close it.

     *

     * @param ins the package or flat XML.

     * @param name the name, can be <code>null</code>.

     * @return a package containing the document.

     * @throws IOException if an error occurs.

     */

    public static ODPackage createFromStream(final InputStream ins, final String name) throws IOException {

        try {

            return create(null, ins, name);

        } finally {

            ins.close();

        }

    }

    public static ODPackage createFromFile(final File f) throws IOException {

        final FileInputStream ins = new FileInputStream(f);

        try {

            return create(f, ins, f.getName());

        } finally {

            ins.close();

        }

    }

    private static final int mimetypeZipEndOffset = 250;

    // ATTN ins is *not* closed if f != null

    private static ODPackage create(final File f, InputStream ins, final String name) throws IOException {

        // first use extension

        final Tuple2<ContentTypeVersioned, Boolean> fromExt = name != null ? ContentTypeVersioned.fromExtension(FileUtils.getExtension(name)) : Tuple2.<ContentTypeVersioned, Boolean> nullInstance();

        ContentTypeVersioned contentType = fromExt.get0();

        Boolean flat = fromExt.get1();

        // then content

        if (flat == null) {

            ins = new BufferedInputStream(ins);

            final String xmlStart = "<?xml";

            if (ins.markSupported())

                ins.mark(Math.max(xmlStart.length(), mimetypeZipEndOffset));

            else

                throw new IllegalStateException("Mark unsupported on " + ins);

            final byte[] buffer = new byte[xmlStart.length()];

            ins.read(buffer);

            if (xmlStart.equals(new String(buffer, StringUtils.ASCII))) {

                // would have to parse the whole document

                contentType = null;

                flat = true;

            } else {

                ins.reset();

                contentType = getType(ins);

                if (contentType != null)

                    flat = false;

            }

            ins.reset();

        }

        final ODPackage res;

        if (flat == null) {

            res = null;

        } else if (flat) {

            try {

                res = (f != null ? ODSingleXMLDocument.createFromFile(f) : ODSingleXMLDocument.createFromStream(ins)).getPackage();

            } catch (JDOMException e) {

                throw new IOException(e);

            }

        } else {

            res = f != null ? new ODPackage(f) : new ODPackage(ins);

        }

        assert contentType == null || contentType == res.getContentType();

        return res;

    }

    private static ContentTypeVersioned getType(final InputStream in) throws IOException {

        // don't want to close underlying stream

        @SuppressWarnings("resource")

        final DataInputStream ins = new DataInputStream(in, true);

        if (ins.read() != 'P' || ins.read() != 'K')

            return null;

        if (ins.skip(16) != 16)

            return null;

        final int compressedSize = ins.readInt();

        final int uncompressedSize = ins.readInt();

        // not a valid package and beyond that we would need to actually inflate the data

        if (compressedSize != uncompressedSize)

            return null;

        final short fnameLength = ins.readShort();

        if (fnameLength != MIMETYPE_ENTRY.length())

            return null;

        final short extraLength = ins.readShort();

        final byte[] array = new byte[Math.max(fnameLength, compressedSize)];

        ins.read(array, 0, fnameLength);

        if (!new String(array, 0, fnameLength, StringUtils.ASCII).equals(MIMETYPE_ENTRY))

            return null;

        if (ins.skip(extraLength) != extraLength)

            return null;

        ins.read(array, 0, compressedSize);

        final String data = new String(array, 0, compressedSize, MIMETYPE_ENC);

        return ContentTypeVersioned.fromMime(data);

    }

    static private XMLVersion getVersion(final XMLFormatVersion fv, final ContentTypeVersioned ct) {

        final XMLVersion v;

        if (ct == null && fv == null)

            v = null;

        else if (ct != null)

            v = ct.getVersion();

        else

            v = fv.getXMLVersion();

        assert fv == null || ct == null || fv.getXMLVersion() == ct.getVersion();

        return v;

    }

    static private <T> void checkVersion(final Class<T> clazz, final String s, final String entry, final T actual, final T required) {

        if (actual != null && required != null) {

            final boolean ok;

            if (actual instanceof ContentTypeVersioned) {

                // we can change our template status since it doesn't affect our content

                ok = ((ContentTypeVersioned) actual).getNonTemplate().equals(((ContentTypeVersioned) required).getNonTemplate());

            } else {

                ok = actual.equals(required);

            }

            if (!ok)

                throw new IllegalArgumentException(entry + " would change " + s + " from " + required + " to " + actual);

        }

    }

    private final Map<String, ODPackageEntry> files;

    private ContentTypeVersioned type;

    private XMLFormatVersion version;

    private ODMeta meta;

    private File file;

    private ODDocument doc;

    private Locale locale;

    public ODPackage() {

        this.files = new HashMap<String, ODPackageEntry>();

        this.type = null;

        this.version = null;

        this.meta = null;

        this.file = null;

        this.doc = null;

    }

    /**

     * Read from the input stream into memory and close it.

     *

     * @param ins the package.

     * @throws IOException if <code>ins</code> couldn't be read.

     */

    public ODPackage(InputStream ins) throws IOException {

        this();

        final ByteArrayOutputStream out = new ByteArrayOutputStream(4096);

        new ZippedFilesProcessor() {

            @Override

            protected void processEntry(ZipEntry entry, InputStream in) throws IOException {

                final String name = entry.getName();

                final Object res;

                out.reset();

                StreamUtils.copy(in, out);

                if (subdocNames.contains(name)) {

                    try {

                        final SAXBuilder builder = OOUtils.getBuilder();

                        // bytes are read fully first in order to be compatible

                        // with SAXParser like Piccolo

                        res = builder.build(new ByteArrayInputStream(out.toByteArray()));

                    } catch (JDOMException e) {

                        // always correct

                        throw new IllegalStateException("parse error on " + name, e);

                    }

                } else {

                    res = out.toByteArray();

                }

                // we don't know yet the types

                putFile(name, res, null, entry.getMethod() == ZipEntry.DEFLATED);

            }

        }.process(ins);

        // fill in the missing types from the manifest, if any

        final ODPackageEntry me = this.files.remove(Manifest.ENTRY_NAME);

        if (me != null) {

            final byte[] m = (byte[]) me.getData();

            try {

                final Map<String, String> manifestEntries = Manifest.parse(new ByteArrayInputStream(m));

                for (final Map.Entry<String, String> e : manifestEntries.entrySet()) {

                    final String path = e.getKey();

                    final String type = e.getValue();

                    final ODPackageEntry entry = this.files.get(path);

                    // eg directory

                    if (entry == null) {

                        this.files.put(path, new ODPackageEntry(path, type, null));

                        // subdocs are already parsed to ODXMLDocument

                    } else if (type.equals(FileUtils.XML_TYPE) && entry.getData() instanceof byte[]) {

                        final Document doc = OOUtils.getBuilder().build(new ByteArrayInputStream((byte[]) entry.getData()));

                        this.putFile(path, doc, type, entry.isCompressed());

                    } else {

                        entry.setType(type);

                    }

                }

            } catch (JDOMException e) {

                throw new IllegalArgumentException("bad manifest " + new String(m), e);

            }

        }

    }

    public ODPackage(File f) throws IOException {

        this(new BufferedInputStream(new FileInputStream(f), 512 * 1024));

        this.file = f;

    }

    public ODPackage(ODPackage o) {

        this();

        for (final String name : o.getEntries()) {

            final ODPackageEntry entry = o.getEntry(name);

            this.putCopy(entry);

        }

        this.type = o.type;

        this.version = o.version;

        this.meta = null;

        this.file = o.file;

        this.doc = null;

    }

    public final File getFile() {

        return this.file;

    }

    public final void setFile(File f) {

        this.file = this.addExt(f);

    }

    private final File addExt(File f) {

        return this.getContentType().addExt(f, false);

    }

    /**

     * The version of this package, <code>null</code> if it cannot be found (eg this package is

     * empty, or contains no xml).

     *

     * @return the version of this package, can be <code>null</code>.

     */

    public final XMLVersion getVersion() {

        return getVersion(this.version, this.type);

    }

    public final XMLFormatVersion getFormatVersion() {

        return this.version;

    }

    /**

     * The type of this package, <code>null</code> if it cannot be found (eg this package is empty).

     *

     * @return the type of this package, can be <code>null</code>.

     */

    public final ContentTypeVersioned getContentType() {

        return this.type;

    }

    public final void setContentType(final ContentTypeVersioned newType) {

        this.putFile(MIMETYPE_ENTRY, newType.getMimeType().getBytes(MIMETYPE_ENC));

    }

    private void updateTypeAndVersion(final String entry, ODXMLDocument xml) {

        this.setTypeAndVersion(entry.equals(CONTENT.getZipEntry()) ? ContentTypeVersioned.fromContent(xml) : null, xml.getFormatVersion(), entry);

    }

    private void updateTypeAndVersion(byte[] mimetype) {

        this.setTypeAndVersion(ContentTypeVersioned.fromMime(mimetype), null, MIMETYPE_ENTRY);

    }

    private final void setTypeAndVersion(final ContentTypeVersioned ct, final XMLFormatVersion fv, final String entry) {

        final Tuple3<XMLVersion, ContentTypeVersioned, XMLFormatVersion> requiredByPkg = this.getRequired(entry);

        if (requiredByPkg != null) {

            checkVersion(XMLVersion.class, "version", entry, getVersion(fv, ct), requiredByPkg.get0());

            checkVersion(ContentTypeVersioned.class, "type", entry, ct, requiredByPkg.get1());

            checkVersion(XMLFormatVersion.class, "format version", entry, fv, requiredByPkg.get2());

        }

        // since we're adding "entry" never set attributes to null

        if (fv != null && !fv.equals(this.version))

            this.version = fv;

        // don't let non-template from content overwrite the correct one

        if (ct != null && !ct.equals(this.type) && (this.type == null || entry.equals(MIMETYPE_ENTRY)))

            this.type = ct;

    }

    // find the versions required by the package without the passed entry

    private final Tuple3<XMLVersion, ContentTypeVersioned, XMLFormatVersion> getRequired(final String entryToIgnore) {

        if (this.files.size() == 0 || (this.files.size() == 1 && this.files.containsKey(entryToIgnore)))

            return null;

        final byte[] mimetype;

        if (this.files.containsKey(MIMETYPE_ENTRY) && !MIMETYPE_ENTRY.equals(entryToIgnore)) {

            mimetype = this.getBinaryFile(MIMETYPE_ENTRY);

        } else {

            mimetype = null;

        }

        XMLFormatVersion fv = null;

        final Map<String, Object> versionFiles = new HashMap<String, Object>();

        for (final String e : subdocNames) {

            if (this.files.containsKey(e) && !e.equals(entryToIgnore)) {

                final ODXMLDocument xmlFile = this.getXMLFile(e);

                versionFiles.put(e, xmlFile);

                if (fv == null)

                    fv = xmlFile.getFormatVersion();

                else

                    assert fv.equals(xmlFile.getFormatVersion()) : "Incoherence";

            }

        }

        final ODXMLDocument content = (ODXMLDocument) versionFiles.get(CONTENT.getZipEntry());

        final ContentTypeVersioned ct;

        if (mimetype != null)

            ct = ContentTypeVersioned.fromMime(mimetype);

        else if (content != null)

            ct = ContentTypeVersioned.fromContent(content);

        else

            ct = null;

        return Tuple3.create(getVersion(fv, ct), ct, fv);

    }

    public final String getMimeType() {

        return this.getContentType().getMimeType();

    }

    public final boolean isTemplate() {

        return this.getContentType().isTemplate();

    }

    public final void setTemplate(boolean b) {

        if (this.type == null)

            throw new IllegalStateException("No type");

        final ContentTypeVersioned newType = b ? this.type.getTemplate() : this.type.getNonTemplate();

        if (newType == null)

            throw new IllegalStateException("Missing " + (b ? "" : "non-") + "template for " + this.type);

        this.setContentType(newType);

    }

    public final void setLocale(Locale locale) {

        this.locale = locale;

    }

    // http://help.libreoffice.org/Common/Selecting_the_Document_Language

    // The document language is set by default-style/text-properties and is not used for formatting.

    // The formatting used to fill cell content is set by the editor application not read from the

    // document.

    public final Locale getLocale() {

        return this.locale == null ? Locale.getDefault() : this.locale;

    }

    public final String formatNumber(Number n, final CellStyle defaultStyle) {

        return formatNumber(NumberFormat.getNumberInstance(getLocale()), n, defaultStyle);

    }

    public final String formatPercent(Number n, final CellStyle defaultStyle) {

        return formatNumber(NumberFormat.getPercentInstance(getLocale()), n, defaultStyle);

    }

    public final String formatCurrency(Number n, final CellStyle defaultStyle) {

        return formatNumber(NumberFormat.getCurrencyInstance(getLocale()), n, defaultStyle);

    }

    private final String formatNumber(NumberFormat format, Number n, final CellStyle defaultStyle) {

        synchronized (format) {

            final int decPlaces = DataStyle.getDecimalPlaces(defaultStyle);

            format.setMinimumFractionDigits(0);

            format.setMaximumFractionDigits(decPlaces);

            return format.format(n);

        }

    }

    /**

     * Call {@link Validator#isValid()} on each XML subdocuments.

     *

     * @return all problems indexed by package entry names, i.e. empty if all OK, <code>null</code>

     *         if validation couldn't occur.

     */

    public final Map<String, String> validateSubDocuments() {

        return this.validateSubDocuments(true, true);

    }

    public final Map<String, String> validateSubDocuments(final boolean allowChangeToValidate, final boolean ignoreForeign) {

        final OOXML ooxml = this.getFormatVersion().getXML();

        if (!ooxml.canValidate())

            return null;

        final Map<String, String> res = new HashMap<String, String>();

        for (final String s : subdocNames) {

            final Document doc = this.getDocument(s);

            if (doc != null) {

                if (allowChangeToValidate) {

                    // OpenOffice do not generate DocType declaration

                    final DocType docType = RootElement.fromDocument(doc).createDocType(ooxml.getVersion());

                    if (docType != null && doc.getDocType() == null)

                        doc.setDocType(docType);

                }

                final String valid = ooxml.getValidator(doc, ignoreForeign).isValid();

                if (valid != null)

                    res.put(s, valid);

            }

        }

        final String valid = ooxml.getValidator(this.createManifest().getDocument(), ignoreForeign).isValid();

        if (valid != null)

            res.put(Manifest.ENTRY_NAME, valid);

        return res;

    }

    public final ODDocument getODDocument() {

        // cache ODDocument otherwise a second one can modify the XML (e.g. remove rows) without the

        // first one knowing

        if (this.doc == null) {

            final ContentType ct = this.getContentType().getType();

            if (ct.equals(ContentType.SPREADSHEET))

                this.doc = SpreadSheet.get(this);

            else if (ct.equals(ContentType.TEXT))

                this.doc = TextDocument.get(this);

        }

        return this.doc;

    }

    public final boolean hasODDocument() {

        return this.doc != null;

    }

    public final SpreadSheet getSpreadSheet() {

        return (SpreadSheet) this.getODDocument();

    }

    public final TextDocument getTextDocument() {

        return (TextDocument) this.getODDocument();

    }

    // *** getter on files

    public final Set<String> getEntries() {

        return this.files.keySet();

    }

    public final ODPackageEntry getEntry(String entry) {

        return this.files.get(entry);

    }

    protected final Object getData(String entry) {

        final ODPackageEntry e = this.getEntry(entry);

        return e == null ? null : e.getData();

    }

    public final byte[] getBinaryFile(String entry) {

        return (byte[]) this.getData(entry);

    }

    public final ODXMLDocument getXMLFile(String xmlEntry) {

        return (ODXMLDocument) this.getData(xmlEntry);

    }

    public final ODXMLDocument getXMLFile(final Document doc) {

        for (final String s : subdocNames) {

            final ODXMLDocument xmlFile = getXMLFile(s);

            if (xmlFile != null && xmlFile.getDocument() == doc) {

                return xmlFile;

            }

        }

        return null;

    }

    /**

     * The XML document where are located the common styles.

     *

     * @return the document where are located styles.

     */

    public final ODXMLDocument getStyles() {

        final ODXMLDocument res;

        if (this.isSingle())

            res = this.getContent();

        else {

            res = this.getXMLFile(STYLES.getZipEntry());

        }

        return res;

    }

    public final ODXMLDocument getContent() {

        return this.getXMLFile(CONTENT.getZipEntry());

    }

    public final ODMeta getMeta() {

        return this.getMeta(false);

    }

    public final ODMeta getMeta(final boolean create) {

        if (this.meta == null) {

            if (this.isSingle()) {

                this.meta = ODMeta.create(this.getContent(), create);

            } else {

                final String metaEntry = META.getZipEntry();

                ODXMLDocument xmlFile = this.getXMLFile(metaEntry);

                if (xmlFile == null && create) {

                    this.putFile(metaEntry, RootElement.META.createDocument(getFormatVersion()));

                    xmlFile = this.getXMLFile(metaEntry);

                }

                if (xmlFile != null) {

                    this.meta = ODMeta.create(xmlFile, create);

                }

            }

        }

        return this.meta;

    }

    /**

     * Parse BASIC libraries in this package.

     *

     * @return the BASIC libraries by name.

     */

    public final Map<String, Library> readBasicLibraries() {

        if (this.isSingle())

            return ((ODSingleXMLDocument) this.getContent()).readBasicLibraries();

        // TODO read DIALOG_LIBRARY_LIST_FILENAME (to support Library with only dialogs)

        final Document doc = (Document) this.getData(Library.DIR_NAME + "/" + Library.LIBRARY_LIST_FILENAME);

        if (doc == null)

            return Collections.emptyMap();

        @SuppressWarnings("unchecked")

        final List<Element> librariesElems = doc.getRootElement().getChildren();

        final Map<String, Library> res = new HashMap<String, Library>(librariesElems.size());

        for (final Element libraryElem : librariesElems) {

            final Library lib = Library.fromPackage(libraryElem, this);

            if (res.put(lib.getName(), lib) != null)

                throw new IllegalStateException("Duplicate library named " + lib.getName());

        }

        return res;

    }

    /**

     * Add the passed libraries to this package. Passed libraries with the same content as existing

     * ones are ignored.

     *

     * @param libraries what to add.

     * @return the actually added libraries.

     * @throws IllegalArgumentException if <code>libraries</code> contains duplicates or if it

     *         cannot be merged into this.

     * @see Library#canBeMerged(Library)

     */

    public final Set<String> addBasicLibraries(final Collection<? extends Library> libraries) {

        return this.addBasicLibraries(Library.toMap(libraries));

    }

    public final Set<String> addBasicLibraries(final ODPackage pkg) {

        if (pkg == this)

            return Collections.emptySet();

        return this.addBasicLibraries(pkg.readBasicLibraries());

    }

    private final Set<String> addBasicLibraries(final Map<String, Library> oLibraries) {

        if (oLibraries.size() == 0)

            return Collections.emptySet();

        if (this.isSingle())

            return ((ODSingleXMLDocument) this.getContent()).addBasicLibraries(oLibraries);

        final Map<String, Library> thisLibraries = this.readBasicLibraries();

        // check that the libraries to add which are already in us can be merged (no elements

        // conflict)

        Library.canBeMerged(thisLibraries, oLibraries);

        // merge

        for (final Library oLib : oLibraries.values()) {

            // can be null

            final Library thisLib = thisLibraries.get(oLib.getName());

            oLib.mergeModules(this, thisLib);

            oLib.mergeDialogs(this, thisLib);

        }

        final Set<String> newLibs = new HashSet<String>(oLibraries.keySet());

        newLibs.removeAll(thisLibraries.keySet());

        return newLibs;

    }

    /**

     * Remove the passed libraries.

     *

     * @param libraries which libraries to remove.

     * @return the actually removed libraries.

     */

    public final Set<String> removeBasicLibraries(final Collection<String> libraries) {

        if (libraries.size() == 0)

            return Collections.emptySet();

        if (this.isSingle())

            return ((ODSingleXMLDocument) this.getContent()).removeBasicLibraries(libraries);

        final Set<String> res = new HashSet<String>();

        for (final String libToRm : libraries) {

            if (Library.removeFromPackage(this, libToRm))

                res.add(libToRm);

        }

        return res;

    }

    /**

     * Parse events for the whole document.

     *

     * @return event listeners by event name.

     */

    public final Map<String, EventListener> readEventListeners() {

        final OOXML xml = getFormatVersion().getXML();

        final Element scriptsElem = this.getContent().getChild(xml.getOfficeScripts(), false);

        final Element eventListeners = scriptsElem == null ? null : scriptsElem.getChild(xml.getOfficeEventListeners(), getVersion().getOFFICE());

        if (eventListeners == null)

            return Collections.emptyMap();

        final Map<String, EventListener> res = new HashMap<String, EventListener>();

        final Namespace scriptNS = getVersion().getNS("script");

        @SuppressWarnings("unchecked")

        final List<Element> listeners = eventListeners.getChildren(xml.getEventListener(), scriptNS);

        for (final Element listener : listeners) {

            final EventListener l = new EventListener(listener);

            res.put(l.getName(), l);

        }

        return res;

    }

    /**

     * Return an XML document.

     *

     * @param xmlEntry the filename, eg "styles.xml".

     * @return the matching document, or <code>null</code> if there's none.

     * @throws JDOMException if error about the XML.

     * @throws IOException if an error occurs while reading the file.

     */

    public Document getDocument(String xmlEntry) {

        final ODXMLDocument xml = this.getXMLFile(xmlEntry);

        return xml == null ? null : xml.getDocument();

    }

    /**

     * Find the passed automatic or common style referenced from the content.

     *

     * @param desc the family, eg <code>StyleStyleDesc&lt;ParagraphStyle&gt;</code>.

     * @param name the name, eg "P1".

     * @return the corresponding XML element.

     */

    public final Element getStyle(final StyleDesc<?> desc, final String name) {

        return this.getStyle(this.getContent().getDocument(), desc, name);

    }

    /**

     * Find the passed automatic or common style. NOTE : <code>referent</code> is needed because

     * there can exist automatic styles with the same name in both "content.xml" and "styles.xml".

     *

     * @param referent the document referencing the style.

     * @param desc the family, eg <code>StyleStyleDesc&lt;ParagraphStyle&gt;</code>.

     * @param name the name, eg "P1".

     * @return the corresponding XML element.

     * @see ODXMLDocument#getStyle(StyleDesc, String, Document)

     */

    public final Element getStyle(final Document referent, final StyleDesc<?> desc, final String name) {

        // avoid searching in content then styles if it cannot be found

        if (name == null)

            return null;

        String refSubDoc = null;

        ODXMLDocument refXMLFile = null;

        final String[] stylesContainer = new String[] { CONTENT.getZipEntry(), STYLES.getZipEntry() };

        for (final String subDoc : stylesContainer) {

            final ODXMLDocument xmlFile = this.getXMLFile(subDoc);

            if (xmlFile != null && xmlFile.getDocument() == referent) {

                refSubDoc = subDoc;

                refXMLFile = xmlFile;

                break;

            }

        }

        if (refSubDoc == null)

            throw new IllegalArgumentException("neither in content nor styles : " + referent);

        Element res = refXMLFile.getStyle(desc, name, referent);

        // if it isn't in content.xml it might be in styles.xml

        if (res == null && refSubDoc.equals(stylesContainer[0])) {

            final ODXMLDocument stylesXMLFile = this.getXMLFile(stylesContainer[1]);

            if (stylesXMLFile != null)

                res = stylesXMLFile.getStyle(desc, name, referent);

        }

        return res;

    }

    public final Element getDefaultStyle(final StyleStyleDesc<?> desc, final boolean create) {

        // from 16.4 of OpenDocument-v1.2-cs01-part1, default-style only usable in office:styles

        return getStyles().getDefaultStyle(desc, create);

    }

    /**

     * Verify that styles referenced by this document are indeed defined. NOTE this method is not

     * perfect : not all problems are detected.

     *

     * @return <code>null</code> if no problem has been found, else a String describing it.

     */

    public final String checkStyles() {

        final ODXMLDocument stylesDoc = this.getStyles();

        final ODXMLDocument contentDoc = this.getContent();

        final Element styles;

        if (stylesDoc != null) {

            styles = stylesDoc.getChild("styles");

            // check styles.xml

            final String res = checkStyles(stylesDoc, styles);

            if (res != null)

                return res;

        } else {

            styles = contentDoc.getChild("styles");

        }

        // check content.xml

        return checkStyles(contentDoc, styles);

    }

    static private final String checkStyles(ODXMLDocument doc, Element styles) {

        try {

            final SetMap<String, String> stylesNames = getStylesNames(doc, styles, doc.getChild("automatic-styles"));

            // text:style-name : text:p, text:span

            // table:style-name : table:table, table:row, table:column, table:cell

            // draw:style-name : draw:text-box

            // style:data-style-name : <style:style style:family="table-cell">

            // TODO check by family

            final Set<String> names = new HashSet<String>(stylesNames.allValues());

            final Iterator attrs = doc.getXPath(".//@text:style-name | .//@table:style-name | .//@draw:style-name | .//@style:data-style-name | .//@style:list-style-name")

                    .selectNodes(doc.getDocument()).iterator();

            while (attrs.hasNext()) {

                final Attribute attr = (Attribute) attrs.next();

                if (!names.contains(attr.getValue()))

                    return "unknown style referenced by " + attr.getName() + " in " + JDOMUtils.output(attr.getParent());

            }

            // TODO check other references like page-*-name (§3 of #prefix())

        } catch (IllegalStateException e) {

            return ExceptionUtils.getStackTrace(e);