/* * 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.client; import org.apache.axiom.om.OMAbstractFactory; import org.apache.axiom.om.OMElement; import org.apache.axiom.soap.SOAP12Constants; import org.apache.axiom.soap.SOAPEnvelope; import org.apache.axiom.soap.SOAPFactory; import org.apache.axiom.soap.SOAPHeader; import org.apache.axiom.soap.SOAPHeaderBlock; import org.apache.axis2.AxisFault; import org.apache.axis2.addressing.EndpointReference; import org.apache.axis2.client.async.AxisCallback; import org.apache.axis2.context.ConfigurationContext; import org.apache.axis2.context.ConfigurationContextFactory; import org.apache.axis2.context.MessageContext; import org.apache.axis2.context.OperationContext; import org.apache.axis2.context.ServiceContext; import org.apache.axis2.context.ServiceGroupContext; import org.apache.axis2.description.AxisModule; import org.apache.axis2.description.AxisOperation; import org.apache.axis2.description.AxisService; import org.apache.axis2.description.AxisServiceGroup; import org.apache.axis2.description.OutInAxisOperation; import org.apache.axis2.description.OutOnlyAxisOperation; import org.apache.axis2.description.Parameter; import org.apache.axis2.description.RobustOutOnlyAxisOperation; import org.apache.axis2.description.TransportOutDescription; import org.apache.axis2.engine.AxisConfiguration; import org.apache.axis2.engine.ListenerManager; import org.apache.axis2.i18n.Messages; import org.apache.axis2.namespace.Constants; import org.apache.axis2.util.Counter; import org.apache.axis2.util.JavaUtils; import org.apache.axis2.wsdl.WSDLConstants; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import javax.wsdl.Definition; import javax.xml.namespace.QName; import java.net.URL; import java.util.ArrayList; /** * Client access to a service. Each instance of this class is associated with a particular {@link * org.apache.axis2.description.AxisService}, and the methods support operations using that service. Note that * these instances are not intended to be thread-safe. * {@link Options} instances are used to configure various aspects of the service access. */ public class ServiceClient { protected static final Log log = LogFactory.getLog(ServiceClient.class); /** Base name used for a service created without an existing configuration. */ public static final String ANON_SERVICE = "anonService"; /** Option property name for automatically cleaning up old OperationContexts */ public static final String AUTO_OPERATION_CLEANUP = "ServiceClient.autoOperationCleanup"; /** Counter used to generate the anonymous service name. */ private static Counter anonServiceCounter = new Counter(); /** * Operation name used for an anonymous out-only operation (meaning we send a message with no * response allowed from the service, equivalent to a WSDL In-Only operation). */ public static final QName ANON_OUT_ONLY_OP = new QName( Constants.AXIS2_NAMESPACE_URI, "anonOutonlyOp", Constants.AXIS2_NAMESPACE_PREFIX); /** * Operation name used for an anonymous robust-out-only operation (meaning we send a message, * with the only possible response a fault, equivalent to a WSDL Robust-In-Only operation). */ public static final QName ANON_ROBUST_OUT_ONLY_OP = new QName( Constants.AXIS2_NAMESPACE_URI, "anonRobustOp", Constants.AXIS2_NAMESPACE_PREFIX); /** * Operation name used for an anonymous in-out operation (meaning we sent a message and receive * a response, equivalent to a WSDL In-Out operation). */ public static final QName ANON_OUT_IN_OP = new QName(Constants.AXIS2_NAMESPACE_URI, "anonOutInOp", Constants.AXIS2_NAMESPACE_PREFIX); // the meta-data of the service that this client access private AxisService axisService; // the configuration in which my meta-data lives private AxisConfiguration axisConfig; // the configuration context in which I live private ConfigurationContext configContext; // service context for this specific service instance private ServiceContext serviceContext; // client options for this service interaction private Options options = new Options(); // options that must override those of the child operation client also private Options overrideOptions; // list of headers to be sent with the simple APIs private ArrayList<OMElement> headers; //whether we create configctx or not private boolean createConfigCtx; private int hashCode; private boolean removeAxisService; /** * Create a service client configured to work with a specific AxisService. If this service is * already in the world that's handed in (in the form of a ConfigurationContext) then I will * happily work in it. If not I will create a small little virtual world and live there. * * @param configContext The configuration context under which this service lives (may be null, * in which case a new local one will be created) * @param axisService The service for which this is the client (may be <code>null</code>, in * which case an anonymous service will be created) * @throws AxisFault if something goes wrong while creating a config context (if needed) */ public ServiceClient(ConfigurationContext configContext, AxisService axisService) throws AxisFault { configureServiceClient(configContext, axisService); } private void configureServiceClient(ConfigurationContext configContext, AxisService axisService) throws AxisFault { if (configContext == null) { if (MessageContext.getCurrentMessageContext() == null) { configContext = ConfigurationContextFactory. createConfigurationContextFromFileSystem(null, null); createConfigCtx = true; } else { configContext = MessageContext.getCurrentMessageContext().getConfigurationContext(); } } this.configContext = configContext; hashCode = (int)anonServiceCounter.incrementAndGet(); // Initialize transports ListenerManager transportManager = configContext.getListenerManager(); if (transportManager == null) { transportManager = new ListenerManager(); transportManager.init(this.configContext); } // save the axisConfig and service axisConfig = configContext.getAxisConfiguration(); if (axisService == null) { axisService = createAnonymousService(); } // axis service is removed from the configuration context // only if user has not added it to configuration context. if (axisConfig.getService(axisService.getName()) == null) { axisService.setClientSide(true); axisConfig.addService(axisService); removeAxisService = true; this.axisService = axisService; } else { axisService.setClientSide(true); removeAxisService = false; this.axisService = axisConfig.getService(axisService.getName()); } AxisServiceGroup axisServiceGroup = this.axisService.getAxisServiceGroup(); ServiceGroupContext sgc = configContext.createServiceGroupContext(axisServiceGroup); serviceContext = sgc.getServiceContext(this.axisService); } /** * This is WSDL4J based constructor to configure the Service Client/ TODO: make this policy * aware * * @param configContext active ConfigurationContext * @param wsdl4jDefinition the WSDL we're going to be using to configure ourselves * @param wsdlServiceName QName of the WSDL service we'd like to access * @param portName name of the WSDL port we'd like to access * @throws AxisFault in case of error */ public ServiceClient(ConfigurationContext configContext, Definition wsdl4jDefinition, QName wsdlServiceName, String portName) throws AxisFault { configureServiceClient(configContext, AxisService.createClientSideAxisService( wsdl4jDefinition, wsdlServiceName, portName, options)); } /** * Create a service client for WSDL service identified by the QName of the wsdl:service element * in a WSDL document. * * @param configContext The configuration context under which this service lives (may be * <code>null</code>, in which case a new local one will be created) * * @param wsdlURL The URL of the WSDL document to read * @param wsdlServiceName The QName of the WSDL service in the WSDL document to create a client * for * @param portName The name of the WSDL 1.1 port to create a client for. May be null (if * WSDL 2.0 is used or if only one port is there). . * @throws AxisFault if something goes wrong while creating a config context (if needed) */ public ServiceClient(ConfigurationContext configContext, URL wsdlURL, QName wsdlServiceName, String portName) throws AxisFault { configureServiceClient(configContext, AxisService.createClientSideAxisService(wsdlURL, wsdlServiceName, portName, options)); Parameter transportName = axisService.getParameter("TRANSPORT_NAME"); if (transportName != null) { TransportOutDescription transportOut = configContext.getAxisConfiguration().getTransportOut( transportName.getValue().toString()); if (transportOut == null) { throw new AxisFault( "Cannot load transport from binding, either defin in Axis2.config " + "or set it explicitely in ServiceClinet.Options"); } else { options.setTransportOut(transportOut); } } } /** * Create a service client by assuming an anonymous service and any other necessary * information. * * @throws AxisFault in case of error */ public ServiceClient() throws AxisFault { this(null, null); } /** * Create an anonymous axisService with one (anonymous) operation for each MEP that we support * dealing with anonymously using the convenience APIs. * * @return the minted anonymous service */ private AxisService createAnonymousService() { // now add anonymous operations to the axis2 service for use with the // shortcut client API. NOTE: We only add the ones we know we'll use // later in the convenience API; if you use // this constructor then you can't expect any magic! AxisService axisService = new AxisService(ANON_SERVICE + anonServiceCounter.incrementAndGet()); RobustOutOnlyAxisOperation robustoutoonlyOperation = new RobustOutOnlyAxisOperation( ANON_ROBUST_OUT_ONLY_OP); axisService.addOperation(robustoutoonlyOperation); OutOnlyAxisOperation outOnlyOperation = new OutOnlyAxisOperation( ANON_OUT_ONLY_OP); axisService.addOperation(outOnlyOperation); OutInAxisOperation outInOperation = new OutInAxisOperation( ANON_OUT_IN_OP); axisService.addOperation(outInOperation); return axisService; } /** * Get the AxisConfiguration * * @return the AxisConfiguration associated with the client. */ public AxisConfiguration getAxisConfiguration() { synchronized (this.axisConfig) { return axisConfig; } } /** * Return the AxisService this is a client for. This is primarily useful when the AxisService is * created anonymously or from WSDL as otherwise the user had the AxisService to start with. * * @return the axisService */ public AxisService getAxisService() { return axisService; } /** * Set the basic client configuration related to this service interaction. * * @param options (non-<code>null</code>) */ public void setOptions(Options options) { this.options = options; } /** * Get the basic client configuration from this service interaction. * * @return options */ public Options getOptions() { return options; } /** * Set a client configuration to override the normal options used by an operation client. Any * values set in this configuration will be used for each client, with the standard values for * the client still used for any values not set in the override configuration. * * @param overrideOptions the Options to use */ public void setOverrideOptions(Options overrideOptions) { this.overrideOptions = overrideOptions; } /** * Get the client configuration used to override the normal options set by an operation client. * * @return override options */ public Options getOverrideOptions() { return overrideOptions; } /** * Engage a module for this service client. * * @param moduleName name of the module to engage * @throws AxisFault if something goes wrong */ public void engageModule(String moduleName) throws AxisFault { synchronized (this.axisConfig) { AxisModule module = axisConfig.getModule(moduleName); if (module != null) { axisService.engageModule(module); } else { throw new AxisFault("Unable to engage module : " + moduleName); } } } /** * Disengage a module for this service client * * @param moduleName name of Module to disengage */ public void disengageModule(String moduleName) { synchronized (this.axisConfig) { AxisModule module = axisConfig.getModule(moduleName); if (module != null) { try { axisService.disengageModule(module); } catch (AxisFault axisFault) { log.error(axisFault.getMessage(), axisFault); } } } } /** * Add an arbitrary XML element as a header to be sent with outgoing messages. * * @param header header to be sent (non-<code>null</code>) */ public void addHeader(OMElement header) { if (headers == null) { headers = new ArrayList<OMElement>(); } headers.add(header); } /** * Add SOAP Header to be sent with outgoing messages. * * @param header header to be sent (non-<code>null</code>) */ public void addHeader(SOAPHeaderBlock header) { if (headers == null) { headers = new ArrayList<OMElement>(); } headers.add(header); } /** Remove all headers for outgoing message. */ public void removeHeaders() { if (headers != null) { headers.clear(); } } /** * Add a simple header containing some text to be sent with interactions. * * @param headerName name of header to add * @param headerText text content for header * @throws AxisFault in case of error */ public void addStringHeader(QName headerName, String headerText) throws AxisFault { if (headerName.getNamespaceURI() == null || "".equals(headerName.getNamespaceURI())) { throw new AxisFault( "Failed to add string header, you have to have namespaceURI for the QName"); } OMElement omElement = OMAbstractFactory.getOMFactory().createOMElement(headerName, null); omElement.setText(headerText); addHeader(omElement); } /** * Directly invoke an anonymous operation with a Robust In-Only MEP. This method just sends your * supplied XML and possibly receives a fault. For more control, you can instead create a client * for the operation and use that client to execute the send. * * @param elem XML to send * @throws AxisFault if something goes wrong while sending, or if a fault is received in * response (per the Robust In-Only MEP). * @see #createClient(QName) */ public void sendRobust(OMElement elem) throws AxisFault { sendRobust(ANON_ROBUST_OUT_ONLY_OP, elem); } /** * Directly invoke a named operation with a Robust In-Only MEP. This method just sends your * supplied XML and possibly receives a fault. For more control, you can instead create a client * for the operation and use that client to execute the send. * * @param operation name of operation to be invoked (non-<code>null</code>) * @param elem XML to send * @throws AxisFault if something goes wrong while sending it or if a fault is received in * response (per the Robust In-Only MEP). * @see #createClient(QName) */ public void sendRobust(QName operation, OMElement elem) throws AxisFault { MessageContext mc = new MessageContext(); fillSOAPEnvelope(mc, elem); OperationClient mepClient = createClient(operation); mepClient.addMessageContext(mc); mepClient.execute(true); } /** * Directly invoke an anonymous operation with an In-Only MEP. This method just sends your * supplied XML without the possibility of any response from the service (even an error - though * you can still get client-side errors such as "Host not found"). For more control, you can * instead create a client for the operation and use that client to execute the send. * * @param elem XML to send * @throws AxisFault ff something goes wrong trying to send the XML * @see #createClient(QName) */ public void fireAndForget(OMElement elem) throws AxisFault { fireAndForget(ANON_OUT_ONLY_OP, elem); } /** * Directly invoke a named operation with an In-Only MEP. This method just sends your supplied * XML without the possibility of any response from the service (even an error - though you can * still get client-side errors such as "Host not found"). For more control, you can instead * create a client for the operation and use that client to execute the send. * * @param operation name of operation to be invoked (non-<code>null</code>) * @param elem XML to send * @throws AxisFault if something goes wrong trying to send the XML * @see #createClient(QName) */ public void fireAndForget(QName operation, OMElement elem) throws AxisFault { // look up the appropriate axisop and create the client OperationClient mepClient = createClient(operation); // create a message context and put the payload in there along with any // headers MessageContext mc = new MessageContext(); fillSOAPEnvelope(mc, elem); // add the message context there and have it go mepClient.addMessageContext(mc); mepClient.execute(false); } /** * Directly invoke an anonymous operation with an In-Out MEP. This method sends your supplied * XML and receives a response. For more control, you can instead create a client for the * operation and use that client to execute the exchange. * <p> * Unless the <code>callTransportCleanup</code> property on the {@link Options} object has been * set to <code>true</code>, the caller must invoke {@link #cleanupTransport()} after * processing the response. * * @param elem the data to send (becomes the content of SOAP body) * @return response * @throws AxisFault in case of error * @see #createClient(QName) * @see #cleanupTransport() */ public OMElement sendReceive(OMElement elem) throws AxisFault { return sendReceive(ANON_OUT_IN_OP, elem); } /** * Directly invoke a named operationQName with an In-Out MEP. This method sends your supplied * XML and receives a response. For more control, you can instead create a client for the * operationQName and use that client to execute the exchange. * <p> * Unless the <code>callTransportCleanup</code> property on the {@link Options} object has been * set to <code>true</code>, the caller must invoke {@link #cleanupTransport()} after * processing the response. * * @param operationQName name of operationQName to be invoked (non-<code>null</code>) * @param xmlPayload the data to send (becomes the content of SOAP body) * @return response OMElement * @throws AxisFault in case of error * @see #cleanupTransport() */ public OMElement sendReceive(QName operationQName, OMElement xmlPayload) throws AxisFault { MessageContext messageContext = new MessageContext(); fillSOAPEnvelope(messageContext, xmlPayload); OperationClient operationClient = createClient(operationQName); operationClient.addMessageContext(messageContext); operationClient.execute(true); MessageContext response = operationClient .getMessageContext(WSDLConstants.MESSAGE_LABEL_IN_VALUE); if (options.isCallTransportCleanup()) { response.getEnvelope().build(); cleanupTransport(); } return response.getEnvelope().getBody().getFirstElement(); } /** * Directly invoke an anonymous operation with an In-Out MEP without waiting for a response. * This method sends your supplied XML with response notification to your callback handler. For * more control, you can instead create a client for the operation and use that client to * execute the exchange. * * @param elem the data to send (becomes the content of SOAP body) * @param callback a Callback which will be notified upon completion * @throws AxisFault in case of error * @see #createClient(QName) */ public void sendReceiveNonBlocking(OMElement elem, AxisCallback callback) throws AxisFault { sendReceiveNonBlocking(ANON_OUT_IN_OP, elem, callback); } /** * Directly invoke a named operation with an In-Out MEP without waiting for a response. This * method sends your supplied XML with response notification to your callback handler. For more * control, you can instead create a client for the operation and use that client to execute the * exchange. * * @param operation name of operation to be invoked (non-<code>null</code>) * @param elem the data to send (becomes the content of SOAP body) * @param callback a Callback which will be notified upon completion * @throws AxisFault in case of error * @see #createClient(QName) */ public void sendReceiveNonBlocking(QName operation, OMElement elem, AxisCallback callback) throws AxisFault { MessageContext mc = new MessageContext(); fillSOAPEnvelope(mc, elem); OperationClient mepClient = createClient(operation); // here a blocking invocation happens in a new thread, so the // progamming model is non blocking mepClient.setCallback(callback); mepClient.addMessageContext(mc); mepClient.execute(false); } /** * Create an operation client with the appropriate message exchange pattern (MEP). This method * creates a full-function MEP client which can be used to exchange messages for a specific * operation. It configures the constructed operation client to use the current normal and * override options. This method is used internally, and also by generated client stub code. * * @param operationQName qualified name of operation (local name is operation name, namespace * URI is just the empty string) * @return client configured to talk to the given operation * @throws AxisFault if the operation is not found */ public OperationClient createClient(QName operationQName) throws AxisFault { // If we're configured to do so, clean up the last OperationContext (thus // releasing its resources) each time we create a new one. if (JavaUtils.isTrue(getOptions().getProperty(AUTO_OPERATION_CLEANUP), true) && !getOptions().isUseSeparateListener()) { cleanupTransport(); } AxisOperation axisOperation = axisService.getOperation(operationQName); if (axisOperation == null) { throw new AxisFault(Messages .getMessage("operationnotfound", operationQName.getLocalPart())); } // add the option properties to the service context String key; for (Object o : options.getProperties().keySet()) { key = (String)o; serviceContext.setProperty(key, options.getProperties().get(key)); } OperationClient operationClient = axisOperation.createClient(serviceContext, options); // if overide options have been set, that means we need to make sure // those options override the options of even the operation client. So, // what we do is switch the parents around to make that work. if (overrideOptions != null) { overrideOptions.setParent(operationClient.getOptions()); operationClient.setOptions(overrideOptions); } return operationClient; } /** * Return the SOAP factory to use depending on what options have been set. If the SOAP version * can not be seen in the options, version 1.1 is the default. * * @return the SOAP factory * @see Options#setSoapVersionURI(String) */ private SOAPFactory getSOAPFactory() { String soapVersionURI = options.getSoapVersionURI(); if (SOAP12Constants.SOAP_ENVELOPE_NAMESPACE_URI.equals(soapVersionURI)) { return OMAbstractFactory.getSOAP12Factory(); } else { // make the SOAP 1.1 the default SOAP version return OMAbstractFactory.getSOAP11Factory(); } } /** * Prepare a SOAP envelope with the stuff to be sent. * * @param messageContext the message context to be filled * @param xmlPayload the payload content * @throws AxisFault if something goes wrong */ private void fillSOAPEnvelope(MessageContext messageContext, OMElement xmlPayload) throws AxisFault { messageContext.setServiceContext(serviceContext); SOAPFactory soapFactory = getSOAPFactory(); SOAPEnvelope envelope = soapFactory.getDefaultEnvelope(); if (xmlPayload != null) { envelope.getBody().addChild(xmlPayload); } addHeadersToEnvelope(envelope); messageContext.setEnvelope(envelope); } /** * Add all configured headers to a SOAP envelope. * * @param envelope the SOAPEnvelope in which to write the headers */ public void addHeadersToEnvelope(SOAPEnvelope envelope) { if (headers != null) { SOAPHeader soapHeader = envelope.getHeader(); for (Object header : headers) { soapHeader.addChild((OMElement)header); } } } /** * Get the endpoint reference for this client using a particular transport. * * @param transport transport name (non-<code>null</code>) * @return local endpoint * @throws AxisFault in case of error */ public EndpointReference getMyEPR(String transport) throws AxisFault { return serviceContext.getMyEPR(transport); } /** * Get the endpoint reference for the service. * * @return service endpoint */ public EndpointReference getTargetEPR() { return serviceContext.getTargetEPR(); } /** * Set the endpoint reference for the service. * * @param targetEpr the EPR this ServiceClient should target */ public void setTargetEPR(EndpointReference targetEpr) { serviceContext.setTargetEPR(targetEpr); options.setTo(targetEpr); } /** * Gets the last OperationContext * * @return the last OperationContext that was invoked by this ServiceClient */ public OperationContext getLastOperationContext() { return serviceContext.getLastOperationContext(); } /** * Get the service context. * * @return context */ public ServiceContext getServiceContext() { return serviceContext; } protected void finalize() throws Throwable { try { cleanup(); } finally { super.finalize(); } } /** * Clean up configuration created with this client. Call this method when you're done using the * client, in order to discard any associated resources. * * @throws AxisFault in case of error */ public void cleanup() throws AxisFault { // if a configuration context was created for this client there'll also // be a service group, so discard that if (!createConfigCtx) { String serviceGroupName = axisService.getAxisServiceGroup().getServiceGroupName(); AxisConfiguration axisConfiguration = configContext.getAxisConfiguration(); AxisServiceGroup asg = axisConfiguration.getServiceGroup(serviceGroupName); if ((asg != null) && removeAxisService) { axisConfiguration.removeServiceGroup(serviceGroupName); } } else { configContext.terminate(); } } /** * Release resources allocated by the transport during the last service invocation. * This method will call * {@link org.apache.axis2.transport.TransportSender#cleanup(MessageContext)} on the * transport sender used during that invocation. * <p> * If the <code>callTransportCleanup</code> property on the {@link Options} object is * set to <code>false</code> (which is the default), then this method must be called * after each invocation of an operation with an in-out MEP, but not before the response * from that operation has been completely processed (or {@link OMElement#build()} * has been called on the response element). * <p> * If the <code>callTransportCleanup</code> property is set to <code>true</code>, * then this method is called automatically. Note that in this case, {@link OMElement#build()} * will be called on the response element before is returned. This effectively disables * deferred parsing of the response and prevents the code from starting to process the * response before it has been completely received. Therefore this approach is not recommended * whenever performance is important. * * @throws AxisFault */ public void cleanupTransport() throws AxisFault { final OperationContext lastOperationContext = getLastOperationContext(); if (lastOperationContext != null) { MessageContext outMessageContext = lastOperationContext .getMessageContext(WSDLConstants.MESSAGE_LABEL_OUT_VALUE); if (outMessageContext != null) { if (outMessageContext.getTransportOut() != null && outMessageContext.getTransportOut().getSender() != null) { outMessageContext.getTransportOut().getSender().cleanup(outMessageContext); } } } } /** * Configure the ServiceClient to interact with the Web service described by the specified * AxisService object. * * @param axisService the AxisService that represents the new Web service. * @throws AxisFault if an error occurs while configuring the ServiceClient. */ public void setAxisService(AxisService axisService) throws AxisFault { if (axisService == null) { // AxisFault? throw new IllegalArgumentException("AxisService is null"); } synchronized (this.axisConfig) { axisConfig.removeService(this.axisService.getName()); this.axisService = axisService; axisService.setClientSide(true); axisConfig.addService(axisService); } AxisServiceGroup axisServiceGroup = axisService.getAxisServiceGroup(); ServiceGroupContext serviceGroupContext = configContext.createServiceGroupContext(axisServiceGroup); this.serviceContext = serviceGroupContext.getServiceContext(axisService); } /** @see java.lang.Object#hashCode() */ public int hashCode() { return this.hashCode; } /** @see java.lang.Object#equals(java.lang.Object) */ public boolean equals(Object obj) { if (this == obj) return true; if (obj == null) return false; if (!(obj instanceof ServiceClient)) return false; final ServiceClient other = (ServiceClient)obj; return hashCode == other.hashCode; } }