/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.harmony.archive.tests.java.util.jar;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.Map;
import java.util.jar.Attributes;
import java.util.jar.JarFile;
import java.util.jar.Manifest;
import junit.framework.TestCase;
import tests.support.resource.Support_Resources;
public class ManifestTest extends TestCase {
private final String JAR_NAME = "hyts_patch.jar";
private final String ATT_JAR_NAME = "hyts_att.jar";
private final String ATT_ENTRY_NAME = "HasAttributes.txt";
private final String ATT_ATT_NAME = "MyAttribute";
private final String MANIFEST_NAME = "manifest/hyts_MANIFEST.MF";
private static final String MANIFEST_CONTENTS = "Manifest-Version: 1.0\nBundle-Name: ClientSupport\nBundle-Description: Provides SessionService, AuthenticationService. Extends RegistryService.\nBundle-Activator: com.ibm.ive.eccomm.client.support.ClientSupportActivator\nImport-Package: com.ibm.ive.eccomm.client.services.log,\n com.ibm.ive.eccomm.client.services.registry,\n com.ibm.ive.eccomm.service.registry; specification-version=1.0.0,\n com.ibm.ive.eccomm.service.session; specification-version=1.0.0,\n com.ibm.ive.eccomm.service.framework; specification-version=1.2.0,\n org.osgi.framework; specification-version=1.0.0,\n org.osgi.service.log; specification-version=1.0.0,\n com.ibm.ive.eccomm.flash; specification-version=1.2.0,\n com.ibm.ive.eccomm.client.xml,\n com.ibm.ive.eccomm.client.http.common,\n com.ibm.ive.eccomm.client.http.client\nImport-Service: org.osgi.service.log.LogReaderService\n org.osgi.service.log.LogService,\n com.ibm.ive.eccomm.service.registry.RegistryService\nExport-Package: com.ibm.ive.eccomm.client.services.authentication; specification-version=1.0.0,\n com.ibm.ive.eccomm.service.authentication; specification-version=1.0.0,\n com.ibm.ive.eccomm.common; specification-version=1.0.0,\n com.ibm.ive.eccomm.client.services.registry.store; specification-version=1.0.0\nExport-Service: com.ibm.ive.eccomm.service.authentication.AuthenticationService,\n com.ibm.ive.eccomm.service.session.SessionService\nBundle-Vendor: IBM\nBundle-Version: 1.2.0\n";
private File resources;
@Override
protected void setUp() {
resources = Support_Resources.createTempFolder();
}
private Manifest getManifest(String fileName) {
try {
Support_Resources.copyFile(resources, null, fileName);
JarFile jarFile = new JarFile(new File(resources, fileName));
Manifest m = jarFile.getManifest();
jarFile.close();
return m;
} catch (Exception e) {
fail("Exception during setup: " + e.toString());
return null;
}
}
/**
* @tests java.util.jar.Manifest#Manifest()
*/
public void testConstructor() {
// Test for method java.util.jar.Manifest()
Manifest emptyManifest = new Manifest();
assertTrue("Should have no entries", emptyManifest.getEntries()
.isEmpty());
assertTrue("Should have no main attributes", emptyManifest
.getMainAttributes().isEmpty());
}
/**
* @tests java.util.jar.Manifest#Manifest(java.util.jar.Manifest)
*/
public void testCopyingConstructor() throws IOException {
Manifest firstManifest = new Manifest(new ByteArrayInputStream(
MANIFEST_CONTENTS.getBytes("ISO-8859-1")));
Manifest secondManifest = new Manifest(firstManifest);
assertEquals(firstManifest, secondManifest);
}
private void assertAttribute(Attributes attr, String name, String value) {
assertEquals("Incorrect " + name, value, attr.getValue(name));
}
private void checkManifest(Manifest manifest) {
Attributes main = manifest.getMainAttributes();
assertAttribute(main, "Bundle-Name", "ClientSupport");
assertAttribute(main, "Bundle-Description",
"Provides SessionService, AuthenticationService. Extends RegistryService.");
assertAttribute(main, "Bundle-Activator",
"com.ibm.ive.eccomm.client.support.ClientSupportActivator");
assertAttribute(
main,
"Import-Package",
"com.ibm.ive.eccomm.client.services.log,com.ibm.ive.eccomm.client.services.registry,com.ibm.ive.eccomm.service.registry; specification-version=1.0.0,com.ibm.ive.eccomm.service.session; specification-version=1.0.0,com.ibm.ive.eccomm.service.framework; specification-version=1.2.0,org.osgi.framework; specification-version=1.0.0,org.osgi.service.log; specification-version=1.0.0,com.ibm.ive.eccomm.flash; specification-version=1.2.0,com.ibm.ive.eccomm.client.xml,com.ibm.ive.eccomm.client.http.common,com.ibm.ive.eccomm.client.http.client");
assertAttribute(
main,
"Import-Service",
"org.osgi.service.log.LogReaderServiceorg.osgi.service.log.LogService,com.ibm.ive.eccomm.service.registry.RegistryService");
assertAttribute(
main,
"Export-Package",
"com.ibm.ive.eccomm.client.services.authentication; specification-version=1.0.0,com.ibm.ive.eccomm.service.authentication; specification-version=1.0.0,com.ibm.ive.eccomm.common; specification-version=1.0.0,com.ibm.ive.eccomm.client.services.registry.store; specification-version=1.0.0");
assertAttribute(
main,
"Export-Service",
"com.ibm.ive.eccomm.service.authentication.AuthenticationService,com.ibm.ive.eccomm.service.session.SessionService");
assertAttribute(main, "Bundle-Vendor", "IBM");
assertAttribute(main, "Bundle-Version", "1.2.0");
}
/**
* @tests java.util.jar.Manifest#Manifest(java.io.InputStream)
*/
public void testStreamConstructor() throws IOException {
Manifest m = getManifest(ATT_JAR_NAME);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
m.write(baos);
InputStream is = new ByteArrayInputStream(baos.toByteArray());
Manifest mCopy = new Manifest(is);
assertEquals(m, mCopy);
Manifest manifest = new Manifest(new ByteArrayInputStream(
MANIFEST_CONTENTS.getBytes("ISO-8859-1")));
checkManifest(manifest);
// regression test for HARMONY-5424
String manifestContent = "Manifest-Version: 1.0\nCreated-By: Apache\nPackage: \nBuild-Jdk: 1.4.1_01\n\n"
+ "Name: \nSpecification-Title: foo\nSpecification-Version: 1.0\nSpecification-Vendor: \n"
+ "Implementation-Title: \nImplementation-Version: 1.0\nImplementation-Vendor: \n\n";
ByteArrayInputStream bis = new ByteArrayInputStream(manifestContent
.getBytes("ISO-8859-1"));
Manifest mf = new Manifest(bis);
assertEquals("Should be 4 main attributes", 4, mf.getMainAttributes()
.size());
Map<String, Attributes> entries = mf.getEntries();
assertEquals("Should be one named entry", 1, entries.size());
Attributes namedEntryAttributes = (Attributes) (entries.get(""));
assertEquals("Should be 6 named entry attributes", 6,
namedEntryAttributes.size());
}
/**
* @tests java.util.jar.Manifest#clear()
*/
public void testClear() {
Manifest m = getManifest(ATT_JAR_NAME);
m.clear();
assertTrue("Should have no entries", m.getEntries().isEmpty());
assertTrue("Should have no main attributes", m.getMainAttributes()
.isEmpty());
}
/**
* @tests java.util.jar.Manifest#clone()
*/
public void testClone() {
Manifest m = getManifest(JAR_NAME);
assertEquals(m, m.clone());
}
/**
* @tests java.util.jar.Manifest#equals(java.lang.Object)
*/
public void testEquals() throws IOException {
Manifest firstManifest = new Manifest(new ByteArrayInputStream(
MANIFEST_CONTENTS.getBytes("ISO-8859-1")));
Manifest secondManifest = new Manifest(new ByteArrayInputStream(
MANIFEST_CONTENTS.getBytes("ISO-8859-1")));
assertEquals(firstManifest, secondManifest);
}
/**
* @tests java.util.jar.Manifest#hashCode()
*/
public void testHashCode() {
Manifest m = getManifest(JAR_NAME);
assertEquals(m.hashCode(), m.clone().hashCode());
}
/**
* @tests java.util.jar.Manifest#getAttributes(java.lang.String)
*/
public void testGetAttributes() {
Manifest m = getManifest(ATT_JAR_NAME);
assertNull("Should not exist", m.getAttributes("Doesn't Exist"));
assertEquals("Should exist", "OK", m.getAttributes(ATT_ENTRY_NAME).get(
new Attributes.Name(ATT_ATT_NAME)));
}
/**
* @tests java.util.jar.Manifest#getEntries()
*/
public void testGetEntries() {
Manifest m = getManifest(ATT_JAR_NAME);
Map<String, Attributes> myMap = m.getEntries();
assertNull("Shouldn't exist", myMap.get("Doesn't exist"));
assertEquals("Should exist", "OK", myMap.get(ATT_ENTRY_NAME).get(
new Attributes.Name(ATT_ATT_NAME)));
}
/**
* @tests java.util.jar.Manifest#getMainAttributes()
*/
public void testGetMainAttributes() {
Manifest m = getManifest(JAR_NAME);
Attributes a = m.getMainAttributes();
assertEquals("Manifest_Version should return 1.0", "1.0", a
.get(Attributes.Name.MANIFEST_VERSION));
}
/**
* @tests {@link java.util.jar.Manifest#write(java.io.OutputStream)
*/
public void testWrite() throws IOException {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
Manifest m = getManifest(JAR_NAME);
// maximum allowed length is 72 for a header, colon and a following
// space
StringBuffer headerName = new StringBuffer(71);
headerName.append("Manifest-");
while (headerName.length() < 70) {
headerName.append("0");
}
m.getMainAttributes().put(new Attributes.Name(headerName.toString()),
"Value");
m.write(baos); // ok
}
/**
* Ensures compatibility with manifests produced by gcc.
*
* @see <a
* href="http://issues.apache.org/jira/browse/HARMONY-5662">HARMONY-5662</a>
*/
public void testNul() throws IOException {
String manifestContent =
"Manifest-Version: 1.0\nCreated-By: nasty gcc tool\n\n\0";
byte[] bytes = manifestContent.getBytes("ISO-8859-1");
new Manifest(new ByteArrayInputStream(bytes)); // the last NUL is ok
bytes[bytes.length - 1] = 26;
new Manifest(new ByteArrayInputStream(bytes)); // the last EOF is ok
bytes[bytes.length - 1] = 'A'; // the last line ignored
new Manifest(new ByteArrayInputStream(bytes));
bytes[2] = 0; // NUL char in Manifest
try {
new Manifest(new ByteArrayInputStream(bytes));
fail("IOException expected");
} catch (IOException e) {
// desired
}
}
public void testDecoding() throws IOException {
Manifest m = getManifest(ATT_JAR_NAME);
final byte[] bVendor = new byte[] { (byte) 0xd0, (byte) 0x9C,
(byte) 0xd0, (byte) 0xb8, (byte) 0xd0, (byte) 0xbb,
(byte) 0xd0, (byte) 0xb0, (byte) 0xd1, (byte) 0x8f, ' ',
(byte) 0xd0, (byte) 0xb4, (byte) 0xd0, (byte) 0xbe,
(byte) 0xd1, (byte) 0x87, (byte) 0xd1, (byte) 0x83,
(byte) 0xd0, (byte) 0xbd, (byte) 0xd1, (byte) 0x8C,
(byte) 0xd0, (byte) 0xba, (byte) 0xd0, (byte) 0xb0, ' ',
(byte) 0xd0, (byte) 0x9C, (byte) 0xd0, (byte) 0xb0,
(byte) 0xd1, (byte) 0x88, (byte) 0xd0, (byte) 0xb0 };
final byte[] bSpec = new byte[] { (byte) 0xe1, (byte) 0x88,
(byte) 0xb0, (byte) 0xe1, (byte) 0x88, (byte) 0x8b,
(byte) 0xe1, (byte) 0x88, (byte) 0x9d, ' ', (byte) 0xe1,
(byte) 0x9a, (byte) 0xa0, (byte) 0xe1, (byte) 0x9a,
(byte) 0xb1, (byte) 0xe1, (byte) 0x9b, (byte) 0x81,
(byte) 0xe1, (byte) 0x9a, (byte) 0xa6, ' ', (byte) 0xd8,
(byte) 0xb3, (byte) 0xd9, (byte) 0x84, (byte) 0xd8,
(byte) 0xa7, (byte) 0xd9, (byte) 0x85, ' ', (byte) 0xd8,
(byte) 0xb9, (byte) 0xd8, (byte) 0xb3, (byte) 0xd9,
(byte) 0x84, (byte) 0xd8, (byte) 0xa7, (byte) 0xd9,
(byte) 0x85, (byte) 0xd8, (byte) 0xa9, ' ', (byte) 0xdc,
(byte) 0xab, (byte) 0xdc, (byte) 0xa0, (byte) 0xdc,
(byte) 0xa1, (byte) 0xdc, (byte) 0x90, ' ', (byte) 0xe0,
(byte) 0xa6, (byte) 0xb6, (byte) 0xe0, (byte) 0xa6,
(byte) 0xbe, (byte) 0xe0, (byte) 0xa6, (byte) 0xa8,
(byte) 0xe0, (byte) 0xa7, (byte) 0x8d, (byte) 0xe0,
(byte) 0xa6, (byte) 0xa4, (byte) 0xe0, (byte) 0xa6,
(byte) 0xbf, ' ', (byte) 0xd0, (byte) 0xa0, (byte) 0xd0,
(byte) 0xb5, (byte) 0xd0, (byte) 0xba, (byte) 0xd1,
(byte) 0x8a, (byte) 0xd0, (byte) 0xb5, (byte) 0xd0,
(byte) 0xbb, ' ', (byte) 0xd0, (byte) 0x9c, (byte) 0xd0,
(byte) 0xb8, (byte) 0xd1, (byte) 0x80, ' ', (byte) 0xe0,
(byte) 0xa6, (byte) 0xb6, (byte) 0xe0, (byte) 0xa6,
(byte) 0xbe, (byte) 0xe0, (byte) 0xa6, (byte) 0xa8,
(byte) 0xe0, (byte) 0xa7, (byte) 0x8d, (byte) 0xe0,
(byte) 0xa6, (byte) 0xa4, (byte) 0xe0, (byte) 0xa6,
(byte) 0xbf, ' ', (byte) 0xe0, (byte) 0xbd, (byte) 0x9e,
(byte) 0xe0, (byte) 0xbd, (byte) 0xb2, (byte) 0xe0,
(byte) 0xbc, (byte) 0x8b, (byte) 0xe0, (byte) 0xbd,
(byte) 0x96, (byte) 0xe0, (byte) 0xbd, (byte) 0x91,
(byte) 0xe0, (byte) 0xbd, (byte) 0xba, ' ', (byte) 0xd0,
(byte) 0x9c, (byte) 0xd0, (byte) 0xb0, (byte) 0xd1,
(byte) 0x88, (byte) 0xd0, (byte) 0xb0, (byte) 0xd1,
(byte) 0x80, ' ', (byte) 0xe1, (byte) 0x8f, (byte) 0x99,
(byte) 0xe1, (byte) 0x8e, (byte) 0xaf, (byte) 0xe1,
(byte) 0x8f, (byte) 0xb1, ' ', (byte) 0xcf, (byte) 0xa8,
(byte) 0xce, (byte) 0xb9, (byte) 0xcf, (byte) 0x81,
(byte) 0xce, (byte) 0xb7, (byte) 0xce, (byte) 0xbd,
(byte) 0xce, (byte) 0xb7, ' ', (byte) 0xde, (byte) 0x90,
(byte) 0xde, (byte) 0xaa, (byte) 0xde, (byte) 0x85,
(byte) 0xde, (byte) 0xa6, ' ', (byte) 0xe0, (byte) 0xbd,
(byte) 0x82, (byte) 0xe0, (byte) 0xbd, (byte) 0x9e,
(byte) 0xe0, (byte) 0xbd, (byte) 0xb2, (byte) 0xe0,
(byte) 0xbc, (byte) 0x8b, (byte) 0xe0, (byte) 0xbd,
(byte) 0x96, (byte) 0xe0, (byte) 0xbd, (byte) 0x91,
(byte) 0xe0, (byte) 0xbd, (byte) 0xba, ' ', (byte) 0xce,
(byte) 0x95, (byte) 0xce, (byte) 0xb9, (byte) 0xcf,
(byte) 0x81, (byte) 0xce, (byte) 0xae, (byte) 0xce,
(byte) 0xbd, (byte) 0xce, (byte) 0xb7, ' ', (byte) 0xd8,
(byte) 0xb5, (byte) 0xd9, (byte) 0x84, (byte) 0xd8,
(byte) 0xad, ' ', (byte) 0xe0, (byte) 0xaa, (byte) 0xb6,
(byte) 0xe0, (byte) 0xaa, (byte) 0xbe, (byte) 0xe0,
(byte) 0xaa, (byte) 0x82, (byte) 0xe0, (byte) 0xaa,
(byte) 0xa4, (byte) 0xe0, (byte) 0xaa, (byte) 0xbf, ' ',
(byte) 0xe5, (byte) 0xb9, (byte) 0xb3, (byte) 0xe5,
(byte) 0x92, (byte) 0x8c, ' ', (byte) 0xd7, (byte) 0xa9,
(byte) 0xd7, (byte) 0x9c, (byte) 0xd7, (byte) 0x95,
(byte) 0xd7, (byte) 0x9d, ' ', (byte) 0xd7, (byte) 0xa4,
(byte) 0xd7, (byte) 0xa8, (byte) 0xd7, (byte) 0x99,
(byte) 0xd7, (byte) 0x93, (byte) 0xd7, (byte) 0x9f, ' ',
(byte) 0xe5, (byte) 0x92, (byte) 0x8c, (byte) 0xe5,
(byte) 0xb9, (byte) 0xb3, ' ', (byte) 0xe5, (byte) 0x92,
(byte) 0x8c, (byte) 0xe5, (byte) 0xb9, (byte) 0xb3, ' ',
(byte) 0xd8, (byte) 0xaa, (byte) 0xd9, (byte) 0x89,
(byte) 0xd9, (byte) 0x86, (byte) 0xda, (byte) 0x86,
(byte) 0xd9, (byte) 0x84, (byte) 0xd9, (byte) 0x89,
(byte) 0xd9, (byte) 0x82, ' ', (byte) 0xe0, (byte) 0xae,
(byte) 0x85, (byte) 0xe0, (byte) 0xae, (byte) 0xae,
(byte) 0xe0, (byte) 0xaf, (byte) 0x88, (byte) 0xe0,
(byte) 0xae, (byte) 0xa4, (byte) 0xe0, (byte) 0xae,
(byte) 0xbf, ' ', (byte) 0xe0, (byte) 0xb0, (byte) 0xb6,
(byte) 0xe0, (byte) 0xb0, (byte) 0xbe, (byte) 0xe0,
(byte) 0xb0, (byte) 0x82, (byte) 0xe0, (byte) 0xb0,
(byte) 0xa4, (byte) 0xe0, (byte) 0xb0, (byte) 0xbf, ' ',
(byte) 0xe0, (byte) 0xb8, (byte) 0xaa, (byte) 0xe0,
(byte) 0xb8, (byte) 0xb1, (byte) 0xe0, (byte) 0xb8,
(byte) 0x99, (byte) 0xe0, (byte) 0xb8, (byte) 0x95,
(byte) 0xe0, (byte) 0xb8, (byte) 0xb4, (byte) 0xe0,
(byte) 0xb8, (byte) 0xa0, (byte) 0xe0, (byte) 0xb8,
(byte) 0xb2, (byte) 0xe0, (byte) 0xb8, (byte) 0x9e, ' ',
(byte) 0xe1, (byte) 0x88, (byte) 0xb0, (byte) 0xe1,
(byte) 0x88, (byte) 0x8b, (byte) 0xe1, (byte) 0x88,
(byte) 0x9d, ' ', (byte) 0xe0, (byte) 0xb7, (byte) 0x83,
(byte) 0xe0, (byte) 0xb7, (byte) 0x8f, (byte) 0xe0,
(byte) 0xb6, (byte) 0xb8, (byte) 0xe0, (byte) 0xb6,
(byte) 0xba, ' ', (byte) 0xe0, (byte) 0xa4, (byte) 0xb6,
(byte) 0xe0, (byte) 0xa4, (byte) 0xbe, (byte) 0xe0,
(byte) 0xa4, (byte) 0xa8, (byte) 0xe0, (byte) 0xa5,
(byte) 0x8d, (byte) 0xe0, (byte) 0xa4, (byte) 0xa4,
(byte) 0xe0, (byte) 0xa4, (byte) 0xbf, (byte) 0xe0,
(byte) 0xa4, (byte) 0x83, ' ', (byte) 0xe1, (byte) 0x83,
(byte) 0x9b, (byte) 0xe1, (byte) 0x83, (byte) 0xa8,
(byte) 0xe1, (byte) 0x83, (byte) 0x95, (byte) 0xe1,
(byte) 0x83, (byte) 0x98, (byte) 0xe1, (byte) 0x83,
(byte) 0x93, (byte) 0xe1, (byte) 0x83, (byte) 0x9d,
(byte) 0xe1, (byte) 0x83, (byte) 0x91, (byte) 0xe1,
(byte) 0x83, (byte) 0x90 };
// TODO Cannot make the following word work, encoder changes needed
// (byte) 0xed, (byte) 0xa0, (byte) 0x80,
// (byte) 0xed, (byte) 0xbc, (byte) 0xb2, (byte) 0xed,
// (byte) 0xa0, (byte) 0x80, (byte) 0xed, (byte) 0xbc,
// (byte) 0xb0, (byte) 0xed, (byte) 0xa0, (byte) 0x80,
// (byte) 0xed, (byte) 0xbd, (byte) 0x85, (byte) 0xed,
// (byte) 0xa0, (byte) 0x80, (byte) 0xed, (byte) 0xbc,
// (byte) 0xb0, (byte) 0xed, (byte) 0xa0, (byte) 0x80,
// (byte) 0xed, (byte) 0xbc, (byte) 0xb9, (byte) 0xed,
// (byte) 0xa0, (byte) 0x80, (byte) 0xed, (byte) 0xbc,
// (byte) 0xb8, (byte) 0xed, (byte) 0xa0, (byte) 0x80,
// (byte) 0xed, (byte) 0xbc, (byte) 0xb9, ' '
final String vendor = new String(bVendor, "UTF-8");
final String spec = new String(bSpec, "UTF-8");
m.getMainAttributes()
.put(Attributes.Name.IMPLEMENTATION_VENDOR, vendor);
m.getAttributes(ATT_ENTRY_NAME).put(
Attributes.Name.IMPLEMENTATION_VENDOR, vendor);
m.getEntries().get(ATT_ENTRY_NAME).put(
Attributes.Name.SPECIFICATION_TITLE, spec);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
m.write(baos);
m = new Manifest(new ByteArrayInputStream(baos.toByteArray()));
assertEquals(vendor, m.getMainAttributes().get(
Attributes.Name.IMPLEMENTATION_VENDOR));
assertEquals(vendor, m.getEntries().get(ATT_ENTRY_NAME).get(
Attributes.Name.IMPLEMENTATION_VENDOR));
assertEquals(spec, m.getAttributes(ATT_ENTRY_NAME).get(
Attributes.Name.SPECIFICATION_TITLE));
}
/**
* @tests {@link java.util.jar.Manifest#read(java.io.InputStream)
*/
public void testRead() {
// Regression for HARMONY-89
InputStream is = new InputStreamImpl();
try {
new Manifest().read(is);
fail("IOException expected");
} catch (IOException e) {
// desired
}
}
// helper class
private class InputStreamImpl extends InputStream {
public InputStreamImpl() {
super();
}
@Override
public int read() {
return 0;
}
}
}