org.apache.tomcat.util.compat
Class JdkCompat

java.lang.Object
  org.apache.tomcat.util.compat.JdkCompat

Direct Known Subclasses:

Jdk14Compat

public class JdkCompat

extends java.lang.Object

General-purpose utility to provide backward-compatibility and JDK independence. This allow use of JDK1.3 ( or higher ) facilities if available, while maintaining the code compatible with older VMs. The goal is to make backward-compatiblity reasonably easy. The base class supports JDK1.3 behavior.

Author:

Tim Funk

Field Summary

static java.lang.String	JAVA_1_0
static java.lang.String	JAVA_1_1
static java.lang.String	JAVA_1_2
static java.lang.String	JAVA_1_3
static java.lang.String	JAVA_1_4
static java.lang.String	JAVA_1_5

Constructor Summary

protected

JdkCompat() Default no-arg constructor

Method Summary

void	chainException(java.lang.Throwable wrapper, java.lang.Throwable wrapped) Chains the wrapped throwable to the wrapper throwable.
static java.lang.String	getJavaVersion() Return java version as a string
static JdkCompat	getJdkCompat() Get a compatibiliy helper class.
long	getMaxMemory() Return the maximum amount of memory the JVM will attempt to use.
java.lang.String	getPartialServletStackTrace(java.lang.Throwable t) Print out a partial servlet stack trace (truncating at the last occurrence of javax.servlet.).
java.net.ServerSocket	getUnboundSocket(javax.net.ServerSocketFactory ssf) Obtain an unbound socket from the ServerSocketFactory.
java.net.URL	getURI(java.io.File file) Return the URI for the given file.
static boolean	isJava14()
static boolean	isJava15()
static boolean	isJava2()
java.lang.String[]	split(java.lang.String path, java.lang.String pat) Splits a string into it's components.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

JAVA_1_0

public static final java.lang.String JAVA_1_0

See Also:

Constant Field Values

JAVA_1_1

public static final java.lang.String JAVA_1_1

See Also:

Constant Field Values

JAVA_1_2

public static final java.lang.String JAVA_1_2

See Also:

Constant Field Values

JAVA_1_3

public static final java.lang.String JAVA_1_3

See Also:

Constant Field Values

JAVA_1_4

public static final java.lang.String JAVA_1_4

See Also:

Constant Field Values

JAVA_1_5

public static final java.lang.String JAVA_1_5

See Also:

Constant Field Values

Constructor Detail

JdkCompat

protected JdkCompat()

Default no-arg constructor

Method Detail

getJavaVersion

public static java.lang.String getJavaVersion()

Return java version as a string

isJava2

public static boolean isJava2()

isJava14

public static boolean isJava14()

isJava15

public static boolean isJava15()

getJdkCompat

public static JdkCompat getJdkCompat()

Get a compatibiliy helper class.

getURI

public java.net.URL getURI(java.io.File file)
                    throws java.net.MalformedURLException

Return the URI for the given file. Originally created for o.a.c.loader.WebappClassLoader

Parameters:

file - The file to wrap into URI

Returns:

A URI as a URL

Throws:

java.net.MalformedURLException - Doh ;)

getMaxMemory

public long getMaxMemory()

Return the maximum amount of memory the JVM will attempt to use.

getPartialServletStackTrace

public java.lang.String getPartialServletStackTrace(java.lang.Throwable t)

Print out a partial servlet stack trace (truncating at the last occurrence of javax.servlet.).

split

public java.lang.String[] split(java.lang.String path,
                                java.lang.String pat)

Splits a string into it's components.

Parameters:

path - String to split

pat - Pattern to split at

Returns:

the components of the path

chainException

public void chainException(java.lang.Throwable wrapper,
                           java.lang.Throwable wrapped)

Chains the wrapped throwable to the wrapper throwable.

Parameters:

wrapper - The wrapper throwable

wrapped - The throwable to be wrapped

getUnboundSocket

public java.net.ServerSocket getUnboundSocket(javax.net.ServerSocketFactory ssf)
                                       throws java.io.IOException

Obtain an unbound socket from the ServerSocketFactory. Return null if unbound sockets cannot be created.

Throws:

java.io.IOException