| Clover coverage report - Common - 1.0.0 |
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| Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
| StreamReader.java | 0% | 0% | 0% | 0% |
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| 1 |
/*
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| 2 |
* EJTools, the Enterprise Java Tools
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*
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* Distributable under LGPL license.
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* See terms of license at www.gnu.org.
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*/
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package org.ejtools.archive.io;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.util.Stack;
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import java.util.zip.ZipEntry;
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import java.util.zip.ZipInputStream;
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import org.ejtools.archive.Archive;
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import org.ejtools.archive.Entry;
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import org.ejtools.archive.JarArchive;
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import org.ejtools.archive.JarEntry;
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/**
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* Reader implementation based on stream.
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* <p>Each Archive and each Entry will be created through a ZipInputStream. This classe serves as parent for derived ones.</p>
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* <p>As the structure is dynamically created, the Visitor Pattern cannot be strictly followed.</p>
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*
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* @author Laurent Etiemble
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* @version $Revision: 1.2 $
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*/
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public abstract class StreamReader implements Reader |
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{
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/** Stacks of the current input streams */
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private Stack inStreams = new Stack(); |
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/**
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* Visit an entry. Do nothing.
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*
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* @param entry The entry to visit
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*/
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| 41 | 0 |
public void visit(Entry entry) { } |
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/**
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* Visit an archive. Each Archive will be build from a ZipInputStream and populated with entries.
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*
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* @param archive The archive to visit
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*/
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| 49 | 0 |
public void visit(Archive archive) |
| 50 |
{
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| 51 | 0 |
try
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{
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| 53 | 0 |
ZipInputStream stream = this.getZipInputStream();
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| 54 | 0 |
if (stream == null) |
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{
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| 56 | 0 |
throw new IllegalStateException("No initial input stream"); |
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} |
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| 59 | 0 |
ZipEntry ze = null;
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| 60 | 0 |
while ((ze = stream.getNextEntry()) != null) |
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{
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| 62 | 0 |
if ((ze != null) && (!ze.isDirectory())) |
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{
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| 64 | 0 |
Entry entry = this.createEntry(ze.getName());
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| 65 | 0 |
if (entry != null) |
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{
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| 67 | 0 |
entry.addTo(archive); |
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} |
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} |
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| 70 | 0 |
stream.closeEntry(); |
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} |
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| 72 | 0 |
stream.close(); |
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} |
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catch (IOException ioe)
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{
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| 76 | 0 |
ioe.printStackTrace(); |
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} |
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} |
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/**
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* Helper method to create an entry.
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*
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* @param uri The URI of the entry
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* @return The new Entry
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*/
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| 87 | 0 |
protected Entry createEntry(String uri)
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{
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| 89 | 0 |
try
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{
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| 91 | 0 |
ZipInputStream stream = this.getZipInputStream();
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| 92 | 0 |
if (stream == null) |
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{
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| 94 | 0 |
throw new IllegalStateException("No initial input stream"); |
| 95 |
} |
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| 96 |
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| 97 | 0 |
byte[] buffer = new byte[1024]; |
| 98 | 0 |
ByteArrayOutputStream baos = new ByteArrayOutputStream();
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| 99 | 0 |
int read = 0;
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| 100 | 0 |
while ((read = stream.read(buffer)) > 0)
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| 101 |
{
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| 102 | 0 |
baos.write(buffer, 0, read); |
| 103 |
} |
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| 104 | 0 |
byte[] content = baos.toByteArray();
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| 105 |
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| 106 | 0 |
try
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{
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| 108 | 0 |
ZipInputStream jis = new ZipInputStream(new ByteArrayInputStream(content)); |
| 109 | 0 |
ZipEntry ze = jis.getNextEntry(); |
| 110 | 0 |
jis.close(); |
| 111 | 0 |
if (ze != null) |
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{
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| 113 | 0 |
Archive archive = new JarArchive(uri);
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//
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// Archive should not have its content !!!
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//
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// archive.setContent(content);
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| 118 | 0 |
this.pushZipInputStream(new ZipInputStream(new ByteArrayInputStream(content))); |
| 119 | 0 |
archive.accept(this);
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| 120 | 0 |
this.popZipInputStream();
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| 121 |
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| 122 | 0 |
return archive;
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} |
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else
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{
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| 126 | 0 |
Entry entry = new JarEntry(uri);
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| 127 | 0 |
entry.setContent(content); |
| 128 | 0 |
return entry;
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} |
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} |
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catch (Exception ioe)
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{
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| 133 | 0 |
Entry entry = new JarEntry(uri);
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| 134 | 0 |
entry.setContent(content); |
| 135 | 0 |
return entry;
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} |
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} |
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catch (IOException ioe)
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{
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| 140 | 0 |
ioe.printStackTrace(); |
| 141 |
} |
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| 142 | 0 |
return null; |
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} |
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| 144 |
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| 145 |
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| 146 |
/**
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* Returns the current stream
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*
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* @return The current stream
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| 150 |
*/
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| 151 | 0 |
protected ZipInputStream getZipInputStream()
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| 152 |
{
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| 153 | 0 |
return (ZipInputStream) this.inStreams.lastElement(); |
| 154 |
} |
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| 155 |
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| 156 |
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| 157 |
/**
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* Pops the last entered stream
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*
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* @return The stream
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* @exception IOException If no stream is available
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*/
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| 163 | 0 |
protected ZipInputStream popZipInputStream()
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| 164 |
throws IOException
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| 165 |
{
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| 166 | 0 |
if (this.inStreams.isEmpty()) |
| 167 |
{
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| 168 | 0 |
return null; |
| 169 |
} |
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| 170 |
else
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| 171 |
{
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| 172 | 0 |
return (ZipInputStream) this.inStreams.pop(); |
| 173 |
} |
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| 174 |
} |
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| 175 |
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| 176 |
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| 177 |
/**
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| 178 |
* Pushes a stream onto the stack
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| 179 |
*
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| 180 |
* @param stream The stream
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| 181 |
* @exception IOException Shoud never occured
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| 182 |
*/
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| 183 | 0 |
protected void pushZipInputStream(ZipInputStream stream) |
| 184 |
throws IOException
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| 185 |
{
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| 186 | 0 |
this.inStreams.push(stream);
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| 187 |
} |
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} |
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