The Axis 2 ObjectStateUtils.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.axis2.util;
import org.apache.axis2.description.AxisMessage;
import org.apache.axis2.description.AxisOperation;
import org.apache.axis2.description.AxisService;
import org.apache.axis2.description.AxisServiceGroup;
import org.apache.axis2.description.TransportInDescription;
import org.apache.axis2.engine.AxisConfiguration;
import org.apache.axis2.engine.Handler;
import org.apache.axis2.transport.TransportListener;
import org.apache.axis2.wsdl.WSDLConstants;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import javax.xml.namespace.QName;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.NotSerializableException;
import java.io.ObjectInput;
import java.io.ObjectOutput;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Hashtable;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.Map;
import java.util.Set;
/**
* Provides functions for saving and restoring an object's state.
*/
public class ObjectStateUtils {
/*
* setup for logging
*/
private static final Log log = LogFactory.getLog(ObjectStateUtils.class);
// used as part of the metadata written out
// indicating a null or empty object
public static boolean EMPTY_OBJECT = false;
// used as part of the metadata written out
// indicating a non-null or live object
public static boolean ACTIVE_OBJECT = true;
// used to indicate the end of a list
public static String LAST_ENTRY = "LAST_OBJ";
// used to indicate an "empty" object
public static String EMPTY_MARKER = "EMPTY_OBJ";
// used to indicate an valid "null" object,
// typically used in key-value pairs where a non-null key refers to a null
// value
public static String NULL_OBJECT = "NULL_OBJ";
// message/trace/logging strings
public static final String UNSUPPORTED_SUID = "Serialization version ID is not supported.";
public static final String UNSUPPORTED_REVID = "Revision ID is not supported.";
public static final String OBJ_SAVE_PROBLEM = "The object could not be saved to the output stream. The object may or may not be important for processing the message when it is restored. Look at how the object is to be used during message processing.";
public static final String OBJ_RESTORE_PROBLEM = "The object could not be restored from the input stream. The object may or may not be important for processing the message when it is restored. Look at how the object is to be used during message processing.";
// as a way to improve performance and reduce trace logging with
// extra exceptions, keep a table of classes that are not serializable
// and only log the first time it that the class is encountered in
// an NotSerializableException
// note that the Hashtable is synchronized by Java so we shouldn't need to
// do extra control over access to the table
public static Hashtable NotSerializableList = new Hashtable();
// --------------------------------------------------------------------
// Save/Restore methods
// --------------------------------------------------------------------
/**
* Write a string to the specified output stream. <p/> The format of the
* information written to the output stream is: <BOLD>Non-Null String
* <LI> UTF - class name string
* <LI> boolean - active flag
* <LI> Object - string data Null String
* <LI> UTF - description
* <LI> boolean - empty flag
*
* @param out
* The output stream
* @param str
* The string to write
* @param desc
* A text description to use for logging
* @throws IOException
* Exception
*/
public static void writeString(ObjectOutput out, String str, String desc)
throws IOException {
// The total number of bytes needed to represent all
// the characters of a string is calculated when the string
// is serialized. If this number is larger than 65535 (ie, 64 KB)
// then a java.io.UTFDataFormatException is thrown
if (str != null) {
String str_desc = str.getClass().getName();
// this string is expected to fit the writeUTF limitations
out.writeUTF(str_desc);
out.writeBoolean(ACTIVE_OBJECT);
out.writeObject(str);
// trace point
if (log.isTraceEnabled()) {
log
.trace("ObjectStateUtils:writeString(): ACTIVE string: str_desc ["
+ str_desc
+ "] string ["
+ str
+ "] desc [" + desc + "]");
}
} else {
// this string is expected to fit the writeUTF limitations
out.writeUTF(desc);
out.writeBoolean(EMPTY_OBJECT);
// for now, don't trace the EMPTY lines
// // trace point
// if (log.isTraceEnabled())
// {
// log.trace("ObjectStateUtils:writeString(): EMPTY String desc
// ["+desc+"] ");
// }
}
}
/**
* Read a string from the specified input stream. Returns null if no string
* is available. <p/> The format of the information to be read from the
* input stream should be <BOLD>Non-Null String
* <LI> UTF - class name string
* <LI> boolean - active flag
* <LI> Object - string data
Null String
* <LI> UTF - description
* <LI> boolean - empty flag
*
* @param in
* The input stream
* @param desc
* A text description to use for logging
* @return The string or null, if not available
* @throws IOException
* @throws ClassNotFoundException
*/
public static String readString(ObjectInput in, String desc)
throws IOException, ClassNotFoundException {
String str = null;
// get the marker
String str_desc = in.readUTF();
// get the flag
boolean isActive = in.readBoolean();
if (isActive == ACTIVE_OBJECT) {
str = (String) in.readObject();
}
if (log.isTraceEnabled()) {
log.trace("ObjectStateUtils:readString(): [" + desc
+ "] returning [" + str + "] for saved [" + str_desc
+ "]");
}
return str;
}
/**
* Write an object to the specified output stream. <p/> The format of the
* information written to the output stream is <p/> Non-Null Object
* <LI> UTF - class name string
* <LI> boolean - active flag
* <LI> object - object if no error in the form of int byte array
*
* <LI> LAST_ENTRY marker in the form of int object
Null Object
* <LI> UTF - description
* <LI> boolean - empty flag
*
* @param out
* The output stream
* @param obj
* The object to write
* @param desc
* A text description to use for logging
* @throws IOException
* Exception
*/
public static void writeObject(ObjectOutput out, Object obj, String desc)
throws IOException {
IOException returned_exception = null;
if (obj != null) {
String objClassName = obj.getClass().getName();
String fullDesc = desc + ":" + objClassName;
// this string is expected to fit the writeUTF limitations
out.writeUTF(fullDesc);
try {
// put the object into a test output buffer to see if it can be
// saved
// this technique preserves the integrity of the real output
// stream in the
// event of a serialization error
ByteArrayOutputStream test_outBuffer = new ByteArrayOutputStream();
ObjectOutputStream test_objOut = new ObjectOutputStream(
test_outBuffer);
// write the object to the test buffer
test_objOut.writeObject(obj);
test_objOut.close();
// put the contents of the test buffer into the
// real output stream
test_outBuffer.close();
byte[] data = test_outBuffer.toByteArray();
out.writeBoolean(ACTIVE_OBJECT);
out.writeObject(data);
} catch (NotSerializableException nse2) {
returned_exception = nse2;
// process this exception
traceNotSerializable(obj, nse2, desc,
"ObjectStateUtils.writeObject()", OBJ_SAVE_PROBLEM);
} catch (IOException exc2) {
// use this as a generic point for exceptions for the test
// output stream
returned_exception = exc2;
// trace point
if (log.isTraceEnabled()) {
log.trace("ObjectStateUtils:writeObject(): object["
+ obj.getClass().getName()
+ "] ***Exception*** ["
+ exc2.getClass().getName() + " : "
+ exc2.getMessage() + "] " + OBJ_SAVE_PROBLEM,
exc2);
// exc2.printStackTrace();
}
}
if (returned_exception != null) {
// Write a null object into the stream instead of the data that
// failed
out.writeBoolean(EMPTY_OBJECT);
// let the caller know that there was a problem
// note the integrity of the real output stream has been
// preserved
throw returned_exception;
}
} else {
// this string is expected to fit the writeUTF limitations
out.writeUTF(desc);
out.writeBoolean(EMPTY_OBJECT);
// trace point
if (log.isTraceEnabled()) {
log.trace("ObjectStateUtils:writeObject(): EMPTY Object ["
+ desc + "] ");
}
}
}
/**
* Read an object from the specified input stream. Returns null if no object
* is available. <p/> The format of the information to be read from the
* input stream should be <BOLD>Non-Null Object
* <LI> UTF - class name string
* <LI> boolean - active flag
* <LI> object - object if no error
* <LI> LAST_ENTRY marker
Null Object
* <LI> UTF - description
* <LI> boolean - empty flag
*
* @param in
* The input stream
* @param desc
* A text description to use for logging
* @return The object or null, if not available
* @throws IOException
* @throws ClassNotFoundException
*/
public static Object readObject(ObjectInput in, String desc)
throws IOException, ClassNotFoundException {
Object obj = null;
byte[] data = null;
String str_desc = in.readUTF();
boolean isActive = in.readBoolean();
if (isActive == ACTIVE_OBJECT) {
// Read the byte array that contains our object
data = (byte[]) in.readObject();
// convert the byte[] back into the real object
ByteArrayInputStream test_inBuffer = new ByteArrayInputStream(data);
ObjectInputStream test_objIn = new ObjectInputStream(test_inBuffer);
obj = test_objIn.readObject();
test_objIn.close();
test_inBuffer.close();
}
String value = "null";
if (obj != null) {
value = obj.getClass().getName();
}
// trace point
if (log.isTraceEnabled()) {
log.trace("ObjectStateUtils:readObject(): [" + desc
+ "] returning [" + value + "] for saved [" + str_desc
+ "]");
}
return obj;
}
/**
* Write an array of objects to the specified output stream. <p/> The format
* of the information written to the output stream is
* <LI> class name of the array
* <LI> active or empty
* <LI> data
NOTE: each object in the array should implement either
* java.io.Serializable or java.io.Externalizable in order to be saved <p/>
*
* @param out
* The output stream
* @param al
* The ArrayList to write
* @param desc
* A text description to use for logging
* @throws IOException
* Exception
*/
public static void writeArrayList(ObjectOutput out, ArrayList al,
String desc) throws IOException {
// The format of the data is
//
// Non-null list:
// UTF - description string
// boolean - active flag
// objects - objects from list
// - ACTIVE_OBJECT
// - data
// EMPTY_OBJEXT - end of array marker
//
// Null list:
// UTF - description string
// boolean - empty flag
//
int savedListSize = 0;
out.writeUTF(desc);
out.writeBoolean(al == null ? EMPTY_OBJECT : ACTIVE_OBJECT);
if (al != null) {
// setup an iterator for the list
Iterator i = al.iterator();
while (i.hasNext()) {
Object obj = i.next();
try {
// put each list entry into a test output buffer to see if
// it can be saved
// this technique preserves the integrity of the real output
// stream in the
// event of a serialization error
ByteArrayOutputStream test_outBuffer = new ByteArrayOutputStream();
ObjectOutputStream test_objOut = new ObjectOutputStream(
test_outBuffer);
// write the object to the test buffer
test_objOut.writeObject(obj);
test_objOut.flush();
byte[] data = test_outBuffer.toByteArray();
out.writeBoolean(ACTIVE_OBJECT);
out.writeObject(data);
test_objOut.close();
test_outBuffer.close();
savedListSize++;
} catch (NotSerializableException nse2) {
// process this exception
traceNotSerializable(obj, nse2, desc,
"ObjectStateUtils.writeArrayList()",
OBJ_SAVE_PROBLEM);
} catch (Exception exc) {
// use this as a generic point for exceptions
// trace point
if (log.isTraceEnabled()) {
log.trace("ObjectStateUtils:writeArrayList(): object["
+ obj.getClass().getName()
+ "] ***Exception*** ["
+ exc.getClass().getName() + " : "
+ exc.getMessage() + "] " + OBJ_SAVE_PROBLEM,
exc);
// exc.printStackTrace();
}
}
}
// put the end-of-marker in the stream
out.writeBoolean(EMPTY_OBJECT);
}
// trace point
if (log.isTraceEnabled()) {
log.trace("ObjectStateUtils:writeArrayList(): List [" + desc
+ "] members saved [" + savedListSize + "]");
}
}
/**
* Reads an array of objects from the specified input stream. Returns null
* if no array is available. <p/> The format of the information to be read
* from the input stream should be
* <LI> class name
* <LI> active or empty
* <LI> data
NOTE: each object in the array should implement either
* java.io.Serializable or java.io.Externalizable in order to be saved <p/>
*
* @param in
* The input stream
* @param desc
* A text description to use for logging
* @return The ArrayList or null, if not available
* @throws IOException
* @throws ClassNotFoundException
*/
public static ArrayList readArrayList(ObjectInput in, String desc)
throws IOException {
// The format of the data is
//
// Non-null list:
// UTF - description string
// boolean - active flag
// objects - objects from list
// - ACTIVE_OBJECT
// - data
// EMPTY_OBJEXT - end of array marker
//
// Null list:
// UTF - description string
// boolean - empty flag
//
ArrayList list = null;
String str_desc = in.readUTF();
boolean isActive = in.readBoolean();
if (isActive == ACTIVE_OBJECT) {
list = new ArrayList();
// stop when we get to the end-of-list marker
while (in.readBoolean()) {
// get the object
try {
byte[] data = (byte[]) in.readObject();
// convert the byte[] back into the real object
ByteArrayInputStream test_inBuffer = new ByteArrayInputStream(
data);
ObjectInputStream test_objIn = new ObjectInputStream(
test_inBuffer);
Object obj = test_objIn.readObject();
test_objIn.close();
test_inBuffer.close();
// add the entry to the list
list.add(obj);
// trace point
if (log.isTraceEnabled()) {
log.trace("ObjectStateUtils:readArrayList(): [" + desc
+ "] index [" + list.size() + "] for saved ["
+ str_desc + "]");
}
} catch (Exception ex) {
// use this as a generic point for all exceptions
// trace point
if (log.isTraceEnabled()) {
log.trace(
"ObjectStateUtils:readArrayList(): [" + desc
+ "] object index [" + list.size()
+ "] for saved [" + str_desc
+ "] ***Exception*** ["
+ ex.getClass().getName() + " : "
+ ex.getMessage() + "] "
+ OBJ_RESTORE_PROBLEM, ex);
// ex.printStackTrace();
}
}
} // end while keep going
}
// trace point
if (log.isTraceEnabled()) {
int size = (list == null) ? -1 : list.size();
log.trace("ObjectStateUtils:readArrayList(): [" + desc
+ "] returning [listsize=" + size + "] for saved ["
+ str_desc + "]");
}
return list;
}
/**
* Write a hashmap of objects to the specified output stream. <p/> The
* format of the information written to the output stream is
* <LI> class name of the array
* <LI> active or empty
* <LI> data
NOTE: each object in the map should implement either
* java.io.Serializable or java.io.Externalizable in order to be saved <p/>
*
* @param out
* The output stream
* @param map
* The HashMap to write
* @param desc
* A text description to use for logging
* @throws IOException
* Exception
*/
public static void writeHashMap(ObjectOutput out, HashMap map, String desc)
throws IOException {
// The format of the data is
//
// Non-null map:
// UTF - description string
// boolean - active flag
// objects - object,object pairs from list
// - active flag
// - key
// - value
// EMPTY OBJECT - end marker
//
// Empty list:
// UTF - description string
// boolean - empty flag
//
int savedMapSize = 0;
out.writeUTF(desc);
out.writeBoolean(map == null ? EMPTY_OBJECT : ACTIVE_OBJECT);
if (map != null) {
Set keyset = map.keySet();
Iterator i = keyset.iterator();
while (i.hasNext()) {
// handle errors when can't access the value for the key
Object key = i.next();
Object value = map.get(key);
try {
// put each pair into a buffer to see if they can be saved
ByteArrayOutputStream pair_outBuffer = new ByteArrayOutputStream();
ObjectOutputStream pair_objOut = new ObjectOutputStream(
pair_outBuffer);
// write the objects in pairs
pair_objOut.writeObject(key);
pair_objOut.writeObject(value);
pair_objOut.flush();
byte[] data = pair_outBuffer.toByteArray();
out.writeBoolean(ACTIVE_OBJECT);
out.writeObject(data);
pair_objOut.close();
pair_outBuffer.close();
savedMapSize++;
} catch (NotSerializableException nse2) {
// only trace the first time a particular class causes this
// exception
traceNotSerializable(key, nse2, desc,
"ObjectStateUtils.writeHashMap() map key",
OBJ_SAVE_PROBLEM);
} catch (Exception exc) {
// use this as a generic point for exceptions
// trace point
if (log.isTraceEnabled()) {
log.trace("ObjectStateUtils:writeHashMap(): map key ["
+ key.getClass().getName()
+ "] ***Exception*** ["
+ exc.getClass().getName() + " : "
+ exc.getMessage() + "] " + OBJ_SAVE_PROBLEM,
exc);
// exc.printStackTrace();
}
}
}
// write out a marker for the end of list
out.writeBoolean(EMPTY_OBJECT);
}
// trace point
if (log.isTraceEnabled()) {
log.trace("ObjectStateUtils:writeHashMap(): map [" + desc
+ "] members saved [" + savedMapSize + "]");
}
}
/**
* Read a hashmap of objects from the specified input stream. Returns null
* if no hashmap is available. <p/> The format of the information to be read
* from the input stream should be
* <LI> class name
* <LI> active or empty
* <LI> data
NOTE: each object in the array should implement either
* java.io.Serializable or java.io.Externalizable in order to be saved <p/>
*
* @param in
* The input stream
* @param desc
* A text description to use for logging
* @return The HashMap or null, if not available
* @throws IOException
* @throws ClassNotFoundException
*/
public static HashMap readHashMap(ObjectInput in, String desc)
throws IOException {
// The format of the data is
//
// Non-null map:
// UTF - description string
// boolean - active flag
// objects - object,object pairs from list
// - active flag
// - key
// - value
// EMPTY OBJECT - end marker
//
// Empty list:
// UTF - description string
// boolean - empty flag
//
int obtainedMapSize = 0;
HashMap map = null;
String str_desc = in.readUTF();
boolean isActive = in.readBoolean();
if (isActive == ACTIVE_OBJECT) {
map = new HashMap();
while (in.readBoolean()) {
Object key = null;
Object value = null;
try {
byte[] data = (byte[]) in.readObject();
// convert the byte[] back into the real objects
ByteArrayInputStream test_inBuffer = new ByteArrayInputStream(
data);
ObjectInputStream test_objIn = new ObjectInputStream(
test_inBuffer);
key = test_objIn.readObject();
value = test_objIn.readObject();
test_objIn.close();
test_inBuffer.close();
// add the entry to the map
map.put(key, value);
obtainedMapSize++;
// trace point
if (log.isTraceEnabled()) {
log.trace("ObjectStateUtils:readHashMap(): [" + desc
+ "] object pair index [" + obtainedMapSize
+ "] for saved [" + str_desc + "]");
}
} catch (Exception ex) {
// use this as a generic point for all exceptions
// trace point
if (log.isTraceEnabled()) {
log.trace(
"ObjectStateUtils:readHashMap(): [" + desc
+ "] object pair index ["
+ obtainedMapSize + "] for saved ["
+ str_desc + "] ***Exception*** ["
+ ex.getClass().getName() + " : "
+ ex.getMessage() + "] "
+ OBJ_RESTORE_PROBLEM, ex);
// ex.printStackTrace();
}
}
}
}
int size = (map == null) ? -1 : map.size();
if (log.isTraceEnabled()) {
log.trace("ObjectStateUtils:readHashMap(): [" + desc
+ "] returning [mapsize=" + size + "] for saved ["
+ str_desc + "]");
}
return map;
}
/**
* Write a linked list of objects to the specified output stream. <p/> The
* format of the information written to the output stream is
* <LI> class name of the array
* <LI> active or empty
* <LI> data
NOTE: each object in the array should implement either
* java.io.Serializable or java.io.Externalizable in order to be saved <p/>
*
* @param out
* The output stream
* @param list
* The LinkedList to write
* @param desc
* A text description to use for logging
* @throws IOException
* Exception
*/
public static void writeLinkedList(ObjectOutput out, LinkedList objlist,
String desc) throws IOException {
// The format of the data is
//
// Non-null list:
// UTF - description string
// boolean - active flag
// objects - objects from list
// - ACTIVE_OBJECT
// - data
// EMPTY_OBJEXT - end of array marker
//
// Null list:
// UTF - description string
// boolean - empty flag
//
int savedListSize = 0;
out.writeUTF(desc);
out.writeBoolean(objlist == null ? EMPTY_OBJECT : ACTIVE_OBJECT);
if (objlist != null) {
// setup an iterator for the list
Iterator i = objlist.iterator();
while (i.hasNext()) {
Object obj = i.next();
try {
// put each list entry into a test output buffer to see if
// it can be saved
// this technique preserves the integrity of the real output
// stream in the
// event of a serialization error
ByteArrayOutputStream test_outBuffer = new ByteArrayOutputStream();
ObjectOutputStream test_objOut = new ObjectOutputStream(
test_outBuffer);
// write the object to the test buffer
test_objOut.writeObject(obj);
test_objOut.flush();
byte[] data = test_outBuffer.toByteArray();
out.writeBoolean(ACTIVE_OBJECT);
out.writeObject(data);
test_objOut.close();
test_outBuffer.close();
savedListSize++;
} catch (NotSerializableException nse2) {
// process this exception
traceNotSerializable(obj, nse2, desc,
"ObjectStateUtils.writeLinkedList()",
OBJ_SAVE_PROBLEM);
} catch (Exception exc) {
// use this as a generic point for exceptions
// trace point
if (log.isTraceEnabled()) {
log.trace("ObjectStateUtils:writeLinkedList(): object["
+ obj.getClass().getName()
+ "] ***Exception*** ["
+ exc.getClass().getName() + " : "
+ exc.getMessage() + "] " + OBJ_SAVE_PROBLEM,
exc);
// exc.printStackTrace();
}
}
}
// put the end-of-marker in the stream
out.writeBoolean(EMPTY_OBJECT);
}
// trace point
if (log.isTraceEnabled()) {
log.trace("ObjectStateUtils:writeLinkedList(): List [" + desc
+ "] members saved [" + savedListSize + "]");
}
}
/**
* Reads a linked list of objects from the specified input stream. Returns
* null if no array is available. <p/> The format of the information to be
* read from the input stream should be
* <LI> class name
* <LI> active or empty
* <LI> data
NOTE: each object in the list should implement either
* java.io.Serializable or java.io.Externalizable in order to be saved <p/>
*
* @param in
* The input stream
* @param desc
* A text description to use for logging
* @return The linked list or null, if not available
* @throws IOException
* @throws ClassNotFoundException
*/
public static LinkedList readLinkedList(ObjectInput in, String desc)
throws IOException {
// The format of the data is
//
// Non-null list:
// UTF - description string
// boolean - active flag
// objects - objects from list
// - ACTIVE_OBJECT
// - data
// EMPTY_OBJEXT - end of array marker
//
// Null list:
// UTF - description string
// boolean - empty flag
//
LinkedList list = null;
String str_desc = in.readUTF();
boolean isActive = in.readBoolean();
if (isActive == ACTIVE_OBJECT) {
list = new LinkedList();
// stop when we get to the end-of-list marker
while (in.readBoolean()) {
// get the object
try {
byte[] data = (byte[]) in.readObject();
// convert the byte[] back into the real object
ByteArrayInputStream test_inBuffer = new ByteArrayInputStream(
data);
ObjectInputStream test_objIn = new ObjectInputStream(
test_inBuffer);
Object obj = test_objIn.readObject();
test_objIn.close();
test_inBuffer.close();
// add the entry to the list
list.add(obj);
// trace point
if (log.isTraceEnabled()) {
log.trace("ObjectStateUtils:readArrayList(): [" + desc
+ "] index [" + list.size() + "] for saved ["
+ str_desc + "]");
}
} catch (Exception ex) {
// use this as a generic point for all exceptions
// trace point
if (log.isTraceEnabled()) {
log.trace(
"ObjectStateUtils:readArrayList(): [" + desc
+ "] object index [" + list.size()
+ "] for saved [" + str_desc
+ "] ***Exception*** ["
+ ex.getClass().getName() + " : "
+ ex.getMessage() + "] "
+ OBJ_RESTORE_PROBLEM, ex);
// ex.printStackTrace();
}
}
} // end while keep going
}
// trace point
if (log.isTraceEnabled()) {
int size = (list == null) ? -1 : list.size();
log.trace("ObjectStateUtils:readArrayList(): [" + desc
+ "] returning [listsize=" + size + "] for saved ["
+ str_desc + "]");
}
return list;
}
// --------------------------------------------------------------------
// Finder methods
// --------------------------------------------------------------------
/**
* Find the AxisOperation object that matches the criteria
*
* @param axisConfig
* The AxisConfiguration object
* @param opClassName
* the class name string for the target object (could be a
* derived class)
* @param opQName
* the name associated with the operation
* @return the AxisOperation object that matches the given criteria
*/
public static AxisOperation findOperation(AxisConfiguration axisConfig,
String opClassName, QName opQName) {
HashMap services = axisConfig.getServices();
Iterator its = services.values().iterator();
while (its.hasNext()) {
AxisService service = (AxisService) its.next();
Iterator ito = service.getOperations();
while (ito.hasNext()) {
AxisOperation operation = (AxisOperation) ito.next();
String tmpOpName = operation.getClass().getName();
QName tmpOpQName = operation.getName();
if ((tmpOpName.equals(opClassName))
&& (tmpOpQName.equals(opQName))) {
// trace point
if (log.isTraceEnabled()) {
log
.trace("ObjectStateUtils:findOperation(axisCfg): returning ["
+ opClassName
+ "] ["
+ opQName.toString() + "]");
}
return operation;
}
}
}
// trace point
if (log.isTraceEnabled()) {
log.trace("ObjectStateUtils:findOperation(axisCfg): ["
+ opClassName + "] [" + opQName.toString()
+ "] returning [null]");
}
return null;
}
/**
* Find the AxisOperation object that matches the criteria
*
* @param service
* The AxisService object
* @param opClassName
* The class name string for the target object (could be a
* derived class)
* @param opQName
* the name associated with the operation
* @return the AxisOperation object that matches the given criteria
*/
public static AxisOperation findOperation(AxisService service,
String opClassName, QName opQName) {
if (service == null) {
return null;
}
Iterator ito = service.getOperations();
while (ito.hasNext()) {
AxisOperation operation = (AxisOperation) ito.next();
String tmpOpName = operation.getClass().getName();
QName tmpOpQName = operation.getName();
if ((tmpOpName.equals(opClassName)) && (tmpOpQName.equals(opQName))) {
// trace point
if (log.isTraceEnabled()) {
log
.trace("ObjectStateUtils:findOperation(service): returning ["
+ opClassName
+ "] ["
+ opQName.toString() + "]");
}
return operation;
}
}
// trace point
if (log.isTraceEnabled()) {
log.trace("ObjectStateUtils:findOperation(service): ["
+ opClassName + "] [" + opQName.toString()
+ "] returning [null]");
}
return null;
}
/**
* Find the AxisService object that matches the criteria
*
* @param axisConfig
* The AxisConfiguration object
* @param serviceClassName
* the class name string for the target object (could be a
* derived class)
* @param serviceName
* the name associated with the service
* @return the AxisService object that matches the criteria
*/
public static AxisService findService(AxisConfiguration axisConfig,
String serviceClassName, String serviceName) {
HashMap services = axisConfig.getServices();
Iterator its = services.values().iterator();
while (its.hasNext()) {
AxisService service = (AxisService) its.next();
String tmpServClassName = service.getClass().getName();
String tmpServName = service.getName();
if ((tmpServClassName.equals(serviceClassName))
&& (tmpServName.equals(serviceName))) {
// trace point
if (log.isTraceEnabled()) {
log.trace("ObjectStateUtils:findService(): returning ["
+ serviceClassName + "] [" + serviceName + "]");
}
return service;
}
}
// trace point
if (log.isTraceEnabled()) {
log.trace("ObjectStateUtils:findService(): [" + serviceClassName
+ "] [" + serviceName + "] returning [null]");
}
return null;
}
/**
* Find the AxisServiceGroup object that matches the criteria <p/> Note
* the saved service group meta information may not match up with any of the
* serviceGroups that are in the current AxisConfiguration object.
*
* @param axisConfig
* The AxisConfiguration object
* @param serviceGrpClassName
* the class name string for the target object (could be a
* derived class)
* @param serviceGrpName
* the name associated with the service group
* @return the AxisServiceGroup object that matches the criteria
*/
public static AxisServiceGroup findServiceGroup(
AxisConfiguration axisConfig, String serviceGrpClassName,
String serviceGrpName) {
Iterator its = axisConfig.getServiceGroups();
while (its.hasNext()) {
AxisServiceGroup serviceGroup = (AxisServiceGroup) its.next();
String tmpSGClassName = serviceGroup.getClass().getName();
String tmpSGName = serviceGroup.getServiceGroupName();
if (tmpSGClassName.equals(serviceGrpClassName)) {
boolean found = false;
// the serviceGroupName can be null, so either both the
// service group names are null or they match
if ((tmpSGName == null) && (serviceGrpName == null)) {
found = true;
} else if ((tmpSGName != null)
&& (tmpSGName.equals(serviceGrpName))) {
found = true;
}
if (found) {
// trace point
if (log.isTraceEnabled()) {
log
.trace("ObjectStateUtils:findServiceGroup(): returning ["
+ serviceGrpClassName
+ "] ["
+ serviceGrpName + "]");
}
return serviceGroup;
}
}
}
// trace point
if (log.isTraceEnabled()) {
log.trace("ObjectStateUtils:findServiceGroup(): ["
+ serviceGrpClassName + "] [" + serviceGrpName
+ "] returning [null]");
}
return null;
}
/**
* Find the AxisMessage object that matches the criteria
*
* @param op
* The AxisOperation object
* @param msgName
* The name associated with the message
* @param msgElementName
* The name associated with the message element
* @return the AxisMessage object that matches the given criteria
*/
public static AxisMessage findMessage(AxisOperation op, String msgName,
String msgElementName) {
// Several kinds of AxisMessages can be associated with a particular
// AxisOperation. The kinds of AxisMessages that are typically
// accessible are associated with "in" and "out".
// There are also different kinds of AxisOperations, and each
// type of AxisOperation can have its own mix of AxisMessages
// depending on the style of message exchange pattern (mep)
if (op == null) {
// trace point
if (log.isTraceEnabled()) {
log.trace("ObjectStateUtils:findMessage(): [" + msgName
+ "] [" + msgElementName
+ "] returning [null] - no AxisOperation");
}
return null;
}
if (msgName == null) {
// nothing to match with, expect to match against a name
// trace point
if (log.isTraceEnabled()) {
log.trace("ObjectStateUtils:findMessage(): [" + msgName
+ "] [" + msgElementName
+ "] returning [null] - message name is not set");
}
return null;
}
String tmpName = null;
String tmpElementName = null;
// -------------------------------------
// first try the "out" message
// -------------------------------------
AxisMessage out = null;
try {
out = op.getMessage(WSDLConstants.MESSAGE_LABEL_OUT_VALUE);
} catch (Exception ex) {
// just absorb the exception
}
if (out != null) {
tmpName = out.getName();
QName tmpQout = out.getElementQName();
if (tmpQout != null) {
tmpElementName = tmpQout.toString();
}
}
// check the criteria for a match
boolean matching = matchMessageNames(tmpName, tmpElementName, msgName,
msgElementName);
if (matching) {
// trace point
if (log.isTraceEnabled()) {
log
.trace("ObjectStateUtils:findMessage(): returning OUT message ["
+ msgName + "] [" + msgElementName + "] ");
}
return out;
}
// -------------------------------------
// next, try the "in" message
// -------------------------------------
AxisMessage in = null;
try {
in = op.getMessage(WSDLConstants.MESSAGE_LABEL_IN_VALUE);
} catch (Exception ex) {
// just absorb the exception
}
if (in != null) {
tmpName = in.getName();
QName tmpQin = in.getElementQName();
if (tmpQin != null) {
tmpElementName = tmpQin.toString();
}
} else {
tmpName = null;
tmpElementName = null;
}
// check the criteria for a match
matching = matchMessageNames(tmpName, tmpElementName, msgName,
msgElementName);
if (matching) {
// trace point
if (log.isTraceEnabled()) {
log
.trace("ObjectStateUtils:findMessage(): returning IN message ["
+ msgName + "] [" + msgElementName + "] ");
}
return in;
}
// if we got here, then no match was found
// trace point
if (log.isTraceEnabled()) {
log.trace("ObjectStateUtils:findMessage(): [" + msgName + "] ["
+ msgElementName + "] returning [null]");
}
return null;
}
/**
* Check the first set of names for a match against the second set of names.
* These names are associated with AxisMessage objects. Message names are
* expected to be non-null. Element names could be either null or non-null.
*
* @param name1
* The name for the first message
* @param elementName1
* The element name for the first message
* @param name2
* The name for the second message
* @param elementName2
* The element name for the second message
* @return TRUE if there's a match, FALSE otherwise
*/
private static boolean matchMessageNames(String name1, String elementName1,
String name2, String elementName2) {
// the name for the message must exist
if ((name1 != null) && (name2 != null) && (name1.equals(name2))) {
// there's a match on the name associated with the message object
// element names need to match, including being null
if ((elementName1 == null) && (elementName2 == null)) {
// there's a match for the nulls
return true;
} else if ((elementName1 != null) && (elementName2 != null)
&& (elementName1.equals(elementName2))) {
// there's a match for the element names
return true;
} else {
// there's some mismatch
return false;
}
} else {
// either a message name is null or the names don't match
return false;
}
}
/**
* Find the Handler object that matches the criteria
*
* @param existingHandlers
* The list of existing handlers and phases
* @param handlerClassName
* the class name string for the target object (could be a
* derived class)
* @return the Handler object that matches the criteria
*/
public static Object findHandler(ArrayList existingHandlers,
MetaDataEntry metaDataEntry) // String handlerClassName)
{
String title = "ObjectStateUtils:findHandler(): ";
String handlerClassName = metaDataEntry.getClassName();
String qNameAsString = metaDataEntry.getQNameAsString();
for (int i = 0; i < existingHandlers.size(); i++) {
if (existingHandlers.get(i) != null) {
String tmpClassName = existingHandlers.get(i).getClass()
.getName();
String tmpName = ((Handler) existingHandlers.get(i)).getName()
.toString();
if ((tmpClassName.equals(handlerClassName))
&& (tmpName.equals(qNameAsString))) {
// trace point
if (log.isTraceEnabled()) {
log.trace(title + " [" + handlerClassName + "] name ["
+ qNameAsString + "] returned");
}
return (Handler) (existingHandlers.get(i));
}
}
}
// trace point
if (log.isTraceEnabled()) {
log.trace(title + " [" + handlerClassName + "] name ["
+ qNameAsString
+ "] was not found in the existingHandlers list");
}
return null;
}
/**
* Find the TransportListener object that matches the criteria <p/> Note
* the saved meta information may not match up with any of the objects that
* are in the current AxisConfiguration object.
*
* @param axisConfig
* The AxisConfiguration object
* @param listenerClassName
* the class name string for the target object (could be a
* derived class)
* @return the TransportListener object that matches the criteria
*/
public static TransportListener findTransportListener(
AxisConfiguration axisConfig, String listenerClassName) {
// TODO: investigate a better technique to match up with a
// TransportListener
HashMap transportsIn = axisConfig.getTransportsIn();
// get a collection of the values in the map
Collection values = transportsIn.values();
Iterator i = values.iterator();
while (i.hasNext()) {
TransportInDescription ti = (TransportInDescription) i.next();
TransportListener tl = ti.getReceiver();
String tlClassName = tl.getClass().getName();
if (tlClassName.equals(listenerClassName)) {
// trace point
if (log.isTraceEnabled()) {
log.trace("ObjectStateUtils:findTransportListener(): ["
+ listenerClassName + "] returned");
}
return tl;
}
}
// trace point
if (log.isTraceEnabled()) {
log
.trace("ObjectStateUtils:findTransportListener(): returning [null]");
}
return null;
}
/**
* Compares the two collections to see if they are equivalent.
*
* @param a1
* The first collection
* @param a2
* The second collection
* @param strict
* Indicates whether strict checking is required. Strict checking
* means that the two collections must have the same elements in
* the same order. Non-strict checking means that the two
* collections must have the same elements, but the order is not
* significant.
* @return TRUE if the two collections are equivalent FALSE, otherwise
*/
public static boolean isEquivalent(ArrayList a1, ArrayList a2,
boolean strict) {
if ((a1 != null) && (a2 != null)) {
// check number of elements in lists
int size1 = a1.size();
int size2 = a2.size();
if (size1 != size2) {
// trace point
if (log.isTraceEnabled()) {
log
.trace("ObjectStateUtils:isEquivalent(ArrayList,ArrayList): FALSE - size mismatch ["
+ size1 + "] != [" + size2 + "]");
}
return false;
}
if (strict) {
// Strict checking
// The lists must contain the same elements in the same order.
return (a1.equals(a2));
} else {
// Non-strict checking
// The lists must contain the same elements but the order is not
// required.
Iterator i1 = a1.iterator();
while (i1.hasNext()) {
Object obj1 = i1.next();
if (!a2.contains(obj1)) {
// trace point
if (log.isTraceEnabled()) {
log
.trace("ObjectStateUtils:isEquivalent(ArrayList,ArrayList): FALSE - mismatch with element ["
+ obj1.getClass().getName() + "] ");
}
return false;
}
}
return true;
}
} else if ((a1 == null) && (a2 == null)) {
return true;
} else if ((a1 != null) && (a2 == null)) {
if (a1.size() == 0) {
return true;
}
return false;
} else if ((a1 == null) && (a2 != null)) {
if (a2.size() == 0) {
return true;
}
return false;
} else {
// mismatch
// trace point
if (log.isTraceEnabled()) {
log
.trace("ObjectStateUtils:isEquivalent(ArrayList,ArrayList): FALSE - mismatch in lists");
}
return false;
}
}
/**
* Compares the two collections to see if they are equivalent.
*
* @param m1
* The first collection
* @param m2
* The second collection
* @param strict
* Indicates whether strict checking is required. Strict checking
* means that the two collections must have the same mappings.
* Non-strict checking means that the two collections must have
* the same keys. In both cases, the order is not significant.
* @return TRUE if the two collections are equivalent FALSE, otherwise
*/
public static boolean isEquivalent(Map m1, Map m2, boolean strict) {
if ((m1 != null) && (m2 != null)) {
if (strict) {
// This is a strict test.
// Returns true if the given object is also a map and the two
// Maps
// represent the same mappings.
return (m1.equals(m2));
} else {
int size1 = m1.size();
int size2 = m2.size();
if (size1 != size2) {
return false;
}
// check the keys, ordering is not important between the two
// maps
Iterator it1 = m1.keySet().iterator();
while (it1.hasNext()) {
Object key1 = it1.next();
if (m2.containsKey(key1) == false) {
return false;
}
}
return true;
}
} else if ((m1 == null) && (m2 == null)) {
return true;
} else {
// mismatch
return false;
}
}
/**
* Compares the two collections to see if they are equivalent.
*
* @param l1
* The first collection
* @param l2
* The second collection
* @return TRUE if the two collections are equivalent FALSE, otherwise
*/
public static boolean isEquivalent(LinkedList l1, LinkedList l2) {
if ((l1 != null) && (l2 != null)) {
// This is a strict test.
// Returns true if the specified object is also a list,
// both lists have the same size, and all corresponding pairs
// of elements in the two lists are equal where
// they contain the same elements in the same order.
return (l1.equals(l2));
} else if ((l1 == null) && (l2 == null)) {
return true;
} else {
// mismatch
return false;
}
}
/**
* Trace the NotSerializable exception for the specified object if this is
* the first time that the specified object has caused the exception.
*
* @param obj
* The object being saved or restored
* @param nse
* The exception object with the details of the error
* @param objDesc
* The description of the object, eg, like the field name where
* it is being used
* @param methodName
* The method name which encountered the exception
* @param desc
* Text to be used for tracing
*/
public static void traceNotSerializable(Object obj,
NotSerializableException nse, String objDesc, String methodName,
String desc) {
if (log.isTraceEnabled() == false) {
// if no tracing is being done, there's nothing to do
// exit quickly
return;
}
if (obj != null) {
String objName = obj.getClass().getName();
if (NotSerializableList.get(objName) == null) {
// set up some information about the exception
// for now, just use an initial counter, which we aren't doing
// much with
// but takes less space than the original object that caused the
// exception
// future: consider using a trace information object that would
// contain a count of the times that a particular class
// caused the exception, the class name of that class,
// and the stack trace for the first time - this information
// could then be accessed from a utility
Integer counter = new Integer(1);
// add to table
NotSerializableList.put(objName, counter);
// trace point
log.trace("ObjectStateUtils: ***NotSerializableException*** ["
+ nse.getMessage() + "] in method [" + methodName
+ "] for object [" + objName + "] associated with ["
+ objDesc + "]. " + desc);
}
}
}
}
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