Package net.sf.jasperreports.engine.util

Class ContextClassLoaderObjectInputStream

java.lang.Object

java.io.InputStream

java.io.ObjectInputStream

net.sf.jasperreports.engine.util.ContextClassLoaderObjectInputStream

All Implemented Interfaces:

Closeable, DataInput, ObjectInput, ObjectStreamConstants, AutoCloseable

public class ContextClassLoaderObjectInputStream
extends ObjectInputStream

A subclass of ObjectInputStream that uses the context class loader to resolve classes encountered in the input stream.

Author:

Lucian Chirita (lucianc@users.sourceforge.net)

Nested Class Summary

Nested classes/interfaces inherited from class java.io.ObjectInputStream

ObjectInputStream.GetField

Field Summary

Fields inherited from interface java.io.ObjectStreamConstants

baseWireHandle, PROTOCOL_VERSION_1, PROTOCOL_VERSION_2, SC_BLOCK_DATA, SC_ENUM, SC_EXTERNALIZABLE, SC_SERIALIZABLE, SC_WRITE_METHOD, SERIAL_FILTER_PERMISSION, STREAM_MAGIC, STREAM_VERSION, SUBCLASS_IMPLEMENTATION_PERMISSION, SUBSTITUTION_PERMISSION, TC_ARRAY, TC_BASE, TC_BLOCKDATA, TC_BLOCKDATALONG, TC_CLASS, TC_CLASSDESC, TC_ENDBLOCKDATA, TC_ENUM, TC_EXCEPTION, TC_LONGSTRING, TC_MAX, TC_NULL, TC_OBJECT, TC_PROXYCLASSDESC, TC_REFERENCE, TC_RESET, TC_STRING

Constructor Summary

Constructors

Constructor	Description
ContextClassLoaderObjectInputStream(JasperReportsContext jasperReportsContext, InputStream in)	Creates an object input stream that reads data from the specified InputStream.

Method Summary

Modifier and Type	Method	Description
JasperReportsContext	getJasperReportsContext()
protected Class<?>	resolveClass(ObjectStreamClass desc)	Calls super.resolveClass() and in case this fails with ClassNotFoundException attempts to load the class using the context class loader.
protected Object	resolveObject(Object obj)	Checks to see if the object is an instance of java.awt.Font, and in case it is, it replaces it with the one looked up for in the font extensions.

Methods inherited from class java.io.ObjectInputStream

available, close, defaultReadObject, enableResolveObject, getObjectInputFilter, read, read, readBoolean, readByte, readChar, readClassDescriptor, readDouble, readFields, readFloat, readFully, readFully, readInt, readLine, readLong, readObject, readObjectOverride, readShort, readStreamHeader, readUnshared, readUnsignedByte, readUnsignedShort, readUTF, registerValidation, resolveProxyClass, setObjectInputFilter, skipBytes

Methods inherited from class java.io.InputStream

mark, markSupported, nullInputStream, read, readAllBytes, readNBytes, readNBytes, reset, skip, transferTo

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.io.ObjectInput

read, skip

Constructor Detail

ContextClassLoaderObjectInputStream

public ContextClassLoaderObjectInputStream(JasperReportsContext jasperReportsContext,
                                           InputStream in)
                                    throws IOException

Creates an object input stream that reads data from the specified InputStream.

Parameters:

in - the input stream to read data from

Throws:

IOException

See Also:

ObjectInputStream(InputStream)

Method Detail

getJasperReportsContext

public JasperReportsContext getJasperReportsContext()

resolveClass

protected Class<?> resolveClass(ObjectStreamClass desc)
                         throws IOException,
                                ClassNotFoundException

Calls super.resolveClass() and in case this fails with ClassNotFoundException attempts to load the class using the context class loader.

Overrides:

resolveClass in class ObjectInputStream

Throws:

IOException

ClassNotFoundException

resolveObject

protected Object resolveObject(Object obj)
                        throws IOException

Checks to see if the object is an instance of java.awt.Font, and in case it is, it replaces it with the one looked up for in the font extensions.

Overrides:

resolveObject in class ObjectInputStream

Throws:

IOException