Tomcat example source code file (CoyoteInputStream.java)

This example Tomcat source code file (CoyoteInputStream.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Tomcat tags/keywords

clonenotsupportedexception, coyoteinputstream, exception, exception, inputbuffer, integer, integer, io, ioexception, ioexception, object, object, privilegedexceptionaction, security, servlet, servletinputstream

The Tomcat CoyoteInputStream.java source code

/*
 * 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.catalina.connector;

import java.io.IOException;
import java.security.AccessController;
import java.security.PrivilegedActionException;
import java.security.PrivilegedExceptionAction;

import javax.servlet.ServletInputStream;

import org.apache.catalina.security.SecurityUtil;

/**
 * This class handles reading bytes.
 * 
 * @author Remy Maucherat
 * @author Jean-Francois Arcand
 */
public class CoyoteInputStream
    extends ServletInputStream {


    // ----------------------------------------------------- Instance Variables


    protected InputBuffer ib;


    // ----------------------------------------------------------- Constructors


    protected CoyoteInputStream(InputBuffer ib) {
        this.ib = ib;
    }


    // -------------------------------------------------------- Package Methods


    /**
     * Clear facade.
     */
    void clear() {
        ib = null;
    }


    // --------------------------------------------------------- Public Methods


    /**
     * Prevent cloning the facade.
     */
    protected Object clone()
        throws CloneNotSupportedException {
        throw new CloneNotSupportedException();
    }


    // --------------------------------------------- ServletInputStream Methods


    public int read()
        throws IOException {    
        if (SecurityUtil.isPackageProtectionEnabled()){
            
            try{
                Integer result = 
                    (Integer)AccessController.doPrivileged(
                        new PrivilegedExceptionAction(){

                            public Object run() throws IOException{
                                Integer integer = new Integer(ib.readByte());
                                return integer;
                            }

                });
                return result.intValue();
            } catch(PrivilegedActionException pae){
                Exception e = pae.getException();
                if (e instanceof IOException){
                    throw (IOException)e;
                } else {
                    throw new RuntimeException(e.getMessage());
                }
            }
        } else {
            return ib.readByte();
        }
    }

    public int available() throws IOException {
        
        if (SecurityUtil.isPackageProtectionEnabled()){
            try{
                Integer result = 
                    (Integer)AccessController.doPrivileged(
                        new PrivilegedExceptionAction(){

                            public Object run() throws IOException{
                                Integer integer = new Integer(ib.available());
                                return integer;
                            }

                });
                return result.intValue();
            } catch(PrivilegedActionException pae){
                Exception e = pae.getException();
                if (e instanceof IOException){
                    throw (IOException)e;
                } else {
                    throw new RuntimeException(e.getMessage());
                }
            }
        } else {
           return ib.available();
        }    
    }

    public int read(final byte[] b) throws IOException {
        
        if (SecurityUtil.isPackageProtectionEnabled()){
            try{
                Integer result = 
                    (Integer)AccessController.doPrivileged(
                        new PrivilegedExceptionAction(){

                            public Object run() throws IOException{
                                Integer integer = 
                                    new Integer(ib.read(b, 0, b.length));
                                return integer;
                            }

                });
                return result.intValue();
            } catch(PrivilegedActionException pae){
                Exception e = pae.getException();
                if (e instanceof IOException){
                    throw (IOException)e;
                } else {
                    throw new RuntimeException(e.getMessage());
                }
            }
        } else {
            return ib.read(b, 0, b.length);
         }        
    }


    public int read(final byte[] b, final int off, final int len)
        throws IOException {
            
        if (SecurityUtil.isPackageProtectionEnabled()){
            try{
                Integer result = 
                    (Integer)AccessController.doPrivileged(
                        new PrivilegedExceptionAction(){

                            public Object run() throws IOException{
                                Integer integer = 
                                    new Integer(ib.read(b, off, len));
                                return integer;
                            }

                });
                return result.intValue();
            } catch(PrivilegedActionException pae){
                Exception e = pae.getException();
                if (e instanceof IOException){
                    throw (IOException)e;
                } else {
                    throw new RuntimeException(e.getMessage());
                }
            }
        } else {
            return ib.read(b, off, len);
        }            
    }


    public int readLine(byte[] b, int off, int len) throws IOException {
        return super.readLine(b, off, len);
    }


    /** 
     * Close the stream
     * Since we re-cycle, we can't allow the call to super.close()
     * which would permantely disable us.
     */
    public void close() throws IOException {
        
        if (SecurityUtil.isPackageProtectionEnabled()){
            try{
                AccessController.doPrivileged(
                    new PrivilegedExceptionAction(){

                        public Object run() throws IOException{
                            ib.close();
                            return null;
                        }

                });
            } catch(PrivilegedActionException pae){
                Exception e = pae.getException();
                if (e instanceof IOException){
                    throw (IOException)e;
                } else {
                    throw new RuntimeException(e.getMessage());
                }
            }
        } else {
             ib.close();
        }
    }

}