Example usage for org.apache.commons.compress.archivers.zip ZipArchiveInputStream skip

Introduction

In this page you can find the example usage for org.apache.commons.compress.archivers.zip ZipArchiveInputStream skip.

Prototype

public long skip(long value) throws IOException 

Source Link

Document

Skips over and discards value bytes of data from this input stream.

Usage

From source file:org.callimachusproject.behaviours.ZipArchiveSupport.java

public InputStream readZipEntry(String match) throws IOException {
    InputStream in = this.openInputStream();
    try {// w  w w  .  j  a  v  a2  s.co m
        ZipArchiveInputStream zip = new ZipArchiveInputStream(in);
        byte[] buf = new byte[1024];
        ZipArchiveEntry entry = zip.getNextZipEntry();
        do {
            if (entry.getName().equals(match)) {
                return zip;
            }
            long size = entry.getSize();
            if (size > 0) {
                zip.skip(size);
            } else {
                while (zip.read(buf, 0, buf.length) >= 0)
                    ;
            }
            entry = zip.getNextZipEntry();
        } while (entry != null);
        zip.close();
    } catch (RuntimeException | Error | IOException e) {
        in.close();
        throw e;
    }
    return null;
}

---

From source file:org.callimachusproject.behaviours.ZipArchiveSupport.java

public XMLEventReader createAtomFeedFromArchive(final String id, final String entryPattern) throws IOException {
    final FileObject file = this;
    final XMLEventFactory ef = XMLEventFactory.newInstance();
    final byte[] buf = new byte[1024];
    final ZipArchiveInputStream zip = new ZipArchiveInputStream(file.openInputStream());
    return new XMLEventReaderBase() {
        private boolean started;
        private boolean ended;

        public void close() throws XMLStreamException {
            try {
                zip.close();/*from  ww w .j av  a 2 s  .c  om*/
            } catch (IOException e) {
                throw new XMLStreamException(e);
            }
        }

        protected boolean more() throws XMLStreamException {
            try {
                ZipArchiveEntry entry;
                if (!started) {
                    Namespace atom = ef.createNamespace(FEED.getPrefix(), FEED.getNamespaceURI());
                    add(ef.createStartDocument());
                    add(ef.createStartElement(FEED, null, Arrays.asList(atom).iterator()));
                    add(ef.createStartElement(TITLE, null, null));
                    add(ef.createCharacters(file.getName()));
                    add(ef.createEndElement(TITLE, null));
                    add(ef.createStartElement(ID, null, null));
                    add(ef.createCharacters(id));
                    add(ef.createEndElement(ID, null));
                    Attribute href = ef.createAttribute("href", file.toUri().toASCIIString());
                    List<Attribute> attrs = Arrays.asList(href, ef.createAttribute("type", "application/zip"));
                    add(ef.createStartElement(LINK, attrs.iterator(), null));
                    add(ef.createEndElement(LINK, null));
                    add(ef.createStartElement(UPDATED, null, null));
                    add(ef.createCharacters(format(new Date(file.getLastModified()))));
                    add(ef.createEndElement(UPDATED, null));
                    started = true;
                    return true;
                } else if (started && !ended && (entry = zip.getNextZipEntry()) != null) {
                    String name = entry.getName();
                    String link = entryPattern.replace("{entry}", PercentCodec.encode(name));
                    MimetypesFileTypeMap mimetypes = new javax.activation.MimetypesFileTypeMap();
                    String type = mimetypes.getContentType(name);
                    if (type == null || type.length() == 0) {
                        type = "application/octet-stream";
                    }
                    add(ef.createStartElement(ENTRY, null, null));
                    add(ef.createStartElement(TITLE, null, null));
                    add(ef.createCharacters(name));
                    add(ef.createEndElement(TITLE, null));
                    Attribute href = ef.createAttribute("href", link);
                    List<Attribute> attrs = Arrays.asList(href, ef.createAttribute("type", type));
                    add(ef.createStartElement(LINK, attrs.iterator(), null));
                    add(ef.createEndElement(LINK, null));
                    long size = entry.getSize();
                    if (size > 0) {
                        zip.skip(size);
                    } else {
                        while (zip.read(buf, 0, buf.length) >= 0)
                            ;
                    }
                    add(ef.createEndElement(ENTRY, null));
                    return true;
                } else if (!ended) {
                    add(ef.createEndElement(FEED, null));
                    add(ef.createEndDocument());
                    ended = true;
                    return true;
                } else {
                    return false;
                }
            } catch (IOException e) {
                throw new XMLStreamException(e);
            }
        }
    };
}

---