/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
*
* Portions Copyright Apache Software Foundation.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can obtain
* a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
* or glassfish/bootstrap/legal/LICENSE.txt. 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 and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
* Sun designates this particular file as subject to the "Classpath" exception
* as provided by Sun in the GPL Version 2 section of the License file that
* accompanied this code. If applicable, add the following below the License
* Header, with the fields enclosed by brackets [] replaced by your own
* identifying information: "Portions Copyrighted [year]
* [name of copyright owner]"
*
* Contributor(s):
*
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package org.apache.coyote.tomcat5;
import java.io.BufferedReader;
import java.io.IOException;
import org.apache.catalina.util.StringManager;
/**
* Coyote implementation of the buffred reader.
*
* @author Remy Maucherat
*/
public class CoyoteReader
extends BufferedReader {
// -------------------------------------------------------------- Constants
private static final char[] LINE_SEP = { '\r', '\n' };
private static final int MAX_LINE_LENGTH = 4096;
/**
* The string manager for this package.
*/
private static final StringManager sm =
StringManager.getManager(Constants.Package);
// ----------------------------------------------------- Instance Variables
protected InputBuffer ib;
protected char[] lineBuffer = null;
// ----------------------------------------------------------- Constructors
public CoyoteReader(InputBuffer ib) {
super(ib, 1);
this.ib = ib;
}
// --------------------------------------------------------- Public Methods
/**
* Prevent cloning the facade.
*/
protected Object clone()
throws CloneNotSupportedException {
throw new CloneNotSupportedException();
}
// -------------------------------------------------------- Package Methods
/**
* Clear facade.
*/
void clear() {
ib = null;
}
// --------------------------------------------------------- Reader Methods
public void close()
throws IOException {
// Disallow operation if the object has gone out of scope
if (ib == null) {
throw new IllegalStateException(
sm.getString("object.invalidScope"));
}
ib.close();
}
public int read()
throws IOException {
// Disallow operation if the object has gone out of scope
if (ib == null) {
throw new IllegalStateException(
sm.getString("object.invalidScope"));
}
return ib.read();
}
public int read(char[] cbuf)
throws IOException {
// Disallow operation if the object has gone out of scope
if (ib == null) {
throw new IllegalStateException(
sm.getString("object.invalidScope"));
}
return ib.read(cbuf, 0, cbuf.length);
}
public int read(char[] cbuf, int off, int len)
throws IOException {
// Disallow operation if the object has gone out of scope
if (ib == null) {
throw new IllegalStateException(
sm.getString("object.invalidScope"));
}
return ib.read(cbuf, off, len);
}
public long skip(long n)
throws IOException {
// Disallow operation if the object has gone out of scope
if (ib == null) {
throw new IllegalStateException(
sm.getString("object.invalidScope"));
}
return ib.skip(n);
}
public boolean ready()
throws IOException {
// Disallow operation if the object has gone out of scope
if (ib == null) {
throw new IllegalStateException(
sm.getString("object.invalidScope"));
}
return ib.ready();
}
public boolean markSupported() {
// Disallow operation if the object has gone out of scope
if (ib == null) {
throw new IllegalStateException(
sm.getString("object.invalidScope"));
}
return true;
}
public void mark(int readAheadLimit)
throws IOException {
// Disallow operation if the object has gone out of scope
if (ib == null) {
throw new IllegalStateException(
sm.getString("object.invalidScope"));
}
ib.mark(readAheadLimit);
}
public void reset()
throws IOException {
// Disallow operation if the object has gone out of scope
if (ib == null) {
throw new IllegalStateException(
sm.getString("object.invalidScope"));
}
ib.reset();
}
public String readLine()
throws IOException {
// Disallow operation if the object has gone out of scope
if (ib == null) {
throw new IllegalStateException(
sm.getString("object.invalidScope"));
}
if (lineBuffer == null) {
lineBuffer = new char[MAX_LINE_LENGTH];
}
String result = null;
int pos = 0;
int end = -1;
int skip = -1;
StringBuffer aggregator = null;
while (end < 0) {
mark(MAX_LINE_LENGTH);
while ((pos < MAX_LINE_LENGTH) && (end < 0)) {
int nRead = read(lineBuffer, pos, MAX_LINE_LENGTH - pos);
if (nRead < 0) {
if (pos == 0) {
return null;
}
end = pos;
skip = pos;
}
for (int i = pos; (i < (pos + nRead)) && (end < 0); i++) {
if (lineBuffer[i] == LINE_SEP[0]) {
end = i;
skip = i + 1;
char nextchar;
if (i == (pos + nRead - 1)) {
nextchar = (char) read();
} else {
nextchar = lineBuffer[i+1];
}
if (nextchar == LINE_SEP[1]) {
skip++;
}
} else if (lineBuffer[i] == LINE_SEP[1]) {
end = i;
skip = i + 1;
}
}
if (nRead > 0) {
pos += nRead;
}
}
if (end < 0) {
if (aggregator == null) {
aggregator = new StringBuffer();
}
aggregator.append(lineBuffer);
pos = 0;
} else {
reset();
skip(skip);
}
}
if (aggregator == null) {
result = new String(lineBuffer, 0, end);
} else {
aggregator.append(lineBuffer, 0, end);
result = aggregator.toString();
}
return result;
}
}
|
