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ReflectiveProcedureCompiler.java
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ReflectiveProcedureCompiler.java
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/*
* Copyright (c) 2002-2017 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.kernel.impl.proc;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.Iterator;
import java.util.List;
import java.util.Optional;
import java.util.function.Supplier;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import org.neo4j.collection.RawIterator;
import org.neo4j.kernel.api.exceptions.ComponentInjectionException;
import org.neo4j.kernel.api.exceptions.KernelException;
import org.neo4j.kernel.api.exceptions.ProcedureException;
import org.neo4j.kernel.api.exceptions.Status;
import org.neo4j.kernel.api.proc.CallableProcedure;
import org.neo4j.kernel.api.proc.CallableUserAggregationFunction;
import org.neo4j.kernel.api.proc.CallableUserFunction;
import org.neo4j.kernel.api.proc.Context;
import org.neo4j.kernel.api.proc.FieldSignature;
import org.neo4j.kernel.api.proc.LoadFailAggregatedFunction;
import org.neo4j.kernel.api.proc.LoadFailFunction;
import org.neo4j.kernel.api.proc.LoadFailProcedure;
import org.neo4j.kernel.api.proc.ProcedureSignature;
import org.neo4j.kernel.api.proc.QualifiedName;
import org.neo4j.kernel.api.proc.UserFunctionSignature;
import org.neo4j.kernel.impl.proc.OutputMappers.OutputMapper;
import org.neo4j.logging.Log;
import org.neo4j.procedure.Description;
import org.neo4j.procedure.Mode;
import org.neo4j.procedure.PerformsWrites;
import org.neo4j.procedure.Procedure;
import org.neo4j.procedure.UserAggregationFunction;
import org.neo4j.procedure.UserAggregationResult;
import org.neo4j.procedure.UserAggregationUpdate;
import org.neo4j.procedure.UserFunction;
import static java.util.Collections.emptyIterator;
import static java.util.Collections.emptyList;
import static org.neo4j.helpers.collection.Iterators.asRawIterator;
/**
* Handles converting a class into one or more callable {@link CallableProcedure}.
*/
class ReflectiveProcedureCompiler
{
private final MethodHandles.Lookup lookup = MethodHandles.lookup();
private final OutputMappers outputMappers;
private final MethodSignatureCompiler inputSignatureDeterminer;
private final FieldInjections safeFieldInjections;
private final FieldInjections allFieldInjections;
private final Log log;
private final TypeMappers typeMappers;
private final ProcedureConfig config;
ReflectiveProcedureCompiler( TypeMappers typeMappers, ComponentRegistry safeComponents,
ComponentRegistry allComponents, Log log, ProcedureConfig config )
{
inputSignatureDeterminer = new MethodSignatureCompiler( typeMappers );
outputMappers = new OutputMappers( typeMappers );
this.safeFieldInjections = new FieldInjections( safeComponents );
this.allFieldInjections = new FieldInjections( allComponents );
this.log = log;
this.typeMappers = typeMappers;
this.config = config;
}
List<CallableUserFunction> compileFunction( Class<?> fcnDefinition ) throws KernelException
{
try
{
List<Method> procedureMethods = Arrays.stream( fcnDefinition.getDeclaredMethods() )
.filter( m -> m.isAnnotationPresent( UserFunction.class ) )
.collect( Collectors.toList() );
if ( procedureMethods.isEmpty() )
{
return emptyList();
}
MethodHandle constructor = constructor( fcnDefinition );
ArrayList<CallableUserFunction> out = new ArrayList<>( procedureMethods.size() );
for ( Method method : procedureMethods )
{
out.add( compileFunction( fcnDefinition, constructor, method ) );
}
out.sort( Comparator.comparing( a -> a.signature().name().toString() ) );
return out;
}
catch ( KernelException e )
{
throw e;
}
catch ( Exception e )
{
throw new ProcedureException( Status.Procedure.ProcedureRegistrationFailed, e,
"Failed to compile function defined in `%s`: %s", fcnDefinition.getSimpleName(), e.getMessage() );
}
}
List<CallableUserAggregationFunction> compileAggregationFunction( Class<?> fcnDefinition ) throws KernelException
{
try
{
List<Method> methods = Arrays.stream( fcnDefinition.getDeclaredMethods() )
.filter( m -> m.isAnnotationPresent( UserAggregationFunction.class ) )
.collect( Collectors.toList() );
if ( methods.isEmpty() )
{
return emptyList();
}
MethodHandle constructor = constructor( fcnDefinition );
ArrayList<CallableUserAggregationFunction> out = new ArrayList<>( methods.size() );
for ( Method method : methods )
{
out.add( compileAggregationFunction( fcnDefinition, constructor, method ) );
}
out.sort( Comparator.comparing( a -> a.signature().name().toString() ) );
return out;
}
catch ( KernelException e )
{
throw e;
}
catch ( Exception e )
{
throw new ProcedureException( Status.Procedure.ProcedureRegistrationFailed, e,
"Failed to compile function defined in `%s`: %s", fcnDefinition.getSimpleName(), e.getMessage() );
}
}
List<CallableProcedure> compileProcedure( Class<?> procDefinition, Optional<String> warning,
boolean fullAccess ) throws KernelException
{
try
{
List<Method> procedureMethods = Arrays.stream( procDefinition.getDeclaredMethods() )
.filter( m -> m.isAnnotationPresent( Procedure.class ) )
.collect( Collectors.toList() );
if ( procedureMethods.isEmpty() )
{
return emptyList();
}
MethodHandle constructor = constructor( procDefinition );
ArrayList<CallableProcedure> out = new ArrayList<>( procedureMethods.size() );
for ( Method method : procedureMethods )
{
String valueName = method.getAnnotation( Procedure.class ).value();
String definedName = method.getAnnotation( Procedure.class ).name();
QualifiedName procName = extractName( procDefinition, method, valueName, definedName );
if ( fullAccess || config.isWhitelisted( procName.toString() ) )
{
out.add( compileProcedure( procDefinition, constructor, method, warning, fullAccess, procName ) );
}
else
{
log.warn( String.format( "The procedure '%s' is not on the whitelist and won't be loaded.",
procName.toString() ) );
}
}
out.sort( Comparator.comparing( a -> a.signature().name().toString() ) );
return out;
}
catch ( KernelException e )
{
throw e;
}
catch ( Exception e )
{
throw new ProcedureException( Status.Procedure.ProcedureRegistrationFailed, e,
"Failed to compile procedure defined in `%s`: %s", procDefinition.getSimpleName(), e.getMessage() );
}
}
private CallableProcedure compileProcedure( Class<?> procDefinition, MethodHandle constructor, Method method,
Optional<String> warning, boolean fullAccess, QualifiedName procName )
throws ProcedureException, IllegalAccessException
{
MethodHandle procedureMethod = lookup.unreflect( method );
List<FieldSignature> inputSignature = inputSignatureDeterminer.signatureFor( method );
OutputMapper outputMapper = outputMappers.mapper( method );
Optional<String> description = description( method );
Procedure procedure = method.getAnnotation( Procedure.class );
Mode mode = procedure.mode();
if ( method.isAnnotationPresent( PerformsWrites.class ) )
{
if ( !procedure.mode().equals( org.neo4j.procedure.Mode.DEFAULT ) )
{
throw new ProcedureException( Status.Procedure.ProcedureRegistrationFailed,
"Conflicting procedure annotation, cannot use PerformsWrites and mode" );
}
else
{
mode = Mode.WRITE;
}
}
Optional<String> deprecated = deprecated( method, procedure::deprecatedBy,
"Use of @Procedure(deprecatedBy) without @Deprecated in " + procName );
List<FieldInjections.FieldSetter> setters = allFieldInjections.setters( procDefinition );
if ( !fullAccess && !config.fullAccessFor( procName.toString() ) )
{
try
{
setters = safeFieldInjections.setters( procDefinition );
}
catch ( ComponentInjectionException e )
{
description = Optional.of( procName.toString() +
" is not available due to not having unrestricted access rights, check configuration." );
log.warn( description.get() );
ProcedureSignature signature =
new ProcedureSignature( procName, inputSignature, outputMapper.signature(), Mode.DEFAULT,
Optional.empty(), new String[0], description, warning );
return new LoadFailProcedure( signature );
}
}
ProcedureSignature signature =
new ProcedureSignature( procName, inputSignature, outputMapper.signature(), mode, deprecated,
config.rolesFor( procName.toString() ), description, warning );
return new ReflectiveProcedure( signature, constructor, procedureMethod, outputMapper, setters );
}
private CallableUserFunction compileFunction( Class<?> procDefinition, MethodHandle constructor, Method method )
throws ProcedureException, IllegalAccessException
{
String valueName = method.getAnnotation( UserFunction.class ).value();
String definedName = method.getAnnotation( UserFunction.class ).name();
QualifiedName procName = extractName( procDefinition, method, valueName, definedName );
if (procName.namespace() == null || procName.namespace().length == 0)
{
throw new ProcedureException( Status.Procedure.ProcedureRegistrationFailed,
"It is not allowed to define functions in the root namespace please use a namespace, e.g. `@UserFunction(\"org.example.com.%s\")",
procName.name() );
}
List<FieldSignature> inputSignature = inputSignatureDeterminer.signatureFor( method );
Class<?> returnType = method.getReturnType();
TypeMappers.NeoValueConverter valueConverter = typeMappers.converterFor( returnType );
MethodHandle procedureMethod = lookup.unreflect( method );
Optional<String> description = description( method );
UserFunction function = method.getAnnotation( UserFunction.class );
Optional<String> deprecated = deprecated( method, function::deprecatedBy,
"Use of @UserFunction(deprecatedBy) without @Deprecated in " + procName );
List<FieldInjections.FieldSetter> setters = allFieldInjections.setters( procDefinition );
if ( !config.fullAccessFor( procName.toString() ) )
{
try
{
setters = safeFieldInjections.setters( procDefinition );
}
catch ( ComponentInjectionException e )
{
description = Optional.of( procName.toString() +
" is not available due to not having unrestricted access rights, check configuration." );
log.warn( description.get() );
UserFunctionSignature signature =
new UserFunctionSignature( procName, inputSignature, valueConverter.type(), deprecated,
config.rolesFor( procName.toString() ), description );
return new LoadFailFunction( signature );
}
}
UserFunctionSignature signature =
new UserFunctionSignature( procName, inputSignature, valueConverter.type(), deprecated,
config.rolesFor( procName.toString() ), description );
return new ReflectiveUserFunction( signature, constructor, procedureMethod, valueConverter, setters );
}
private CallableUserAggregationFunction compileAggregationFunction( Class<?> definition, MethodHandle constructor,
Method method ) throws ProcedureException, IllegalAccessException
{
String valueName = method.getAnnotation( UserAggregationFunction.class ).value();
String definedName = method.getAnnotation( UserAggregationFunction.class ).name();
QualifiedName funcName = extractName( definition, method, valueName, definedName );
if ( funcName.namespace() == null || funcName.namespace().length == 0 )
{
throw new ProcedureException( Status.Procedure.ProcedureRegistrationFailed,
"It is not allowed to define functions in the root namespace please use a namespace, e.g. `@UserFunction(\"org.example.com.%s\")",
funcName.name() );
}
//find update and result method
Method update = null;
Method result = null;
Class<?> aggregator = method.getReturnType();
for ( Method m : aggregator.getDeclaredMethods() )
{
if ( m.isAnnotationPresent( UserAggregationUpdate.class ) )
{
if ( update != null )
{
throw new ProcedureException( Status.Procedure.ProcedureRegistrationFailed,
"Class '%s' contains multiple methods annotated with '@%s'.", aggregator.getSimpleName(),
UserAggregationUpdate.class.getSimpleName() );
}
update = m;
}
if ( m.isAnnotationPresent( UserAggregationResult.class ) )
{
if ( result != null )
{
throw new ProcedureException( Status.Procedure.ProcedureRegistrationFailed,
"Class '%s' contains multiple methods annotated with '@%s'.", aggregator.getSimpleName(),
UserAggregationResult.class.getSimpleName() );
}
result = m;
}
}
if ( result == null || update == null )
{
throw new ProcedureException( Status.Procedure.ProcedureRegistrationFailed,
"Class '%s' must contain methods annotated with both '@%s' as well as '@%s'.",
aggregator.getSimpleName(), UserAggregationResult.class.getSimpleName(),
UserAggregationUpdate.class.getSimpleName() );
}
if ( update.getReturnType() != void.class )
{
throw new ProcedureException( Status.Procedure.ProcedureRegistrationFailed,
"Update method '%s' in %s has type '%s' but must have return type 'void'.", update.getName(),
aggregator.getSimpleName(), update.getReturnType().getSimpleName() );
}
if ( !Modifier.isPublic( method.getModifiers() ) )
{
throw new ProcedureException( Status.Procedure.ProcedureRegistrationFailed,
"Aggregation method '%s' in %s must be public.", method.getName(), definition.getSimpleName() );
}
if ( !Modifier.isPublic( aggregator.getModifiers() ) )
{
throw new ProcedureException( Status.Procedure.ProcedureRegistrationFailed,
"Aggregation class '%s' must be public.", aggregator.getSimpleName() );
}
if ( !Modifier.isPublic( update.getModifiers() ) )
{
throw new ProcedureException( Status.Procedure.ProcedureRegistrationFailed,
"Aggregation update method '%s' in %s must be public.", method.getName(),
aggregator.getSimpleName() );
}
if ( !Modifier.isPublic( result.getModifiers() ) )
{
throw new ProcedureException( Status.Procedure.ProcedureRegistrationFailed,
"Aggregation result method '%s' in %s must be public.", method.getName(),
aggregator.getSimpleName() );
}
List<FieldSignature> inputSignature = inputSignatureDeterminer.signatureFor( update );
Class<?> returnType = result.getReturnType();
TypeMappers.NeoValueConverter valueConverter = typeMappers.converterFor( returnType );
MethodHandle creator = lookup.unreflect( method );
MethodHandle updateMethod = lookup.unreflect( update );
MethodHandle resultMethod = lookup.unreflect( result );
Optional<String> description = description( method );
UserAggregationFunction function = method.getAnnotation( UserAggregationFunction.class );
Optional<String> deprecated = deprecated( method, function::deprecatedBy,
"Use of @UserAggregationFunction(deprecatedBy) without @Deprecated in " + funcName );
List<FieldInjections.FieldSetter> setters = allFieldInjections.setters( definition );
if ( !config.fullAccessFor( funcName.toString() ) )
{
try
{
setters = safeFieldInjections.setters( definition );
}
catch ( ComponentInjectionException e )
{
description = Optional.of( funcName.toString() +
" is not available due to not having unrestricted access rights, check configuration." );
log.warn( description.get() );
UserFunctionSignature signature =
new UserFunctionSignature( funcName, inputSignature, valueConverter.type(), deprecated,
config.rolesFor( funcName.toString() ), description );
return new LoadFailAggregatedFunction( signature );
}
}
UserFunctionSignature signature =
new UserFunctionSignature( funcName, inputSignature, valueConverter.type(), deprecated,
config.rolesFor( funcName.toString() ), description );
return new ReflectiveUserAggregationFunction( signature, constructor, creator, updateMethod, resultMethod,
valueConverter, setters );
}
private Optional<String> deprecated( Method method, Supplier<String> supplier, String warning )
{
String deprecatedBy = supplier.get();
Optional<String> deprecated = Optional.empty();
if ( method.isAnnotationPresent( Deprecated.class ) )
{
deprecated = Optional.of( deprecatedBy );
}
else if ( !deprecatedBy.isEmpty() )
{
log.warn( warning );
deprecated = Optional.of( deprecatedBy );
}
return deprecated;
}
private Optional<String> description( Method method )
{
if ( method.isAnnotationPresent( Description.class ) )
{
return Optional.of( method.getAnnotation( Description.class ).value() );
}
else
{
return Optional.empty();
}
}
private MethodHandle constructor( Class<?> procDefinition ) throws ProcedureException
{
try
{
return lookup.unreflectConstructor( procDefinition.getConstructor() );
}
catch ( IllegalAccessException | NoSuchMethodException e )
{
throw new ProcedureException( Status.Procedure.ProcedureRegistrationFailed, e,
"Unable to find a usable public no-argument constructor in the class `%s`. " +
"Please add a valid, public constructor, recompile the class and try again.",
procDefinition.getSimpleName() );
}
}
private QualifiedName extractName( Class<?> procDefinition, Method m, String valueName, String definedName )
{
String procName = (definedName.trim().isEmpty() ? valueName : definedName);
if ( procName.trim().length() > 0 )
{
String[] split = procName.split( "\\." );
if ( split.length == 1 )
{
return new QualifiedName( new String[0], split[0] );
}
else
{
int lastElement = split.length - 1;
return new QualifiedName( Arrays.copyOf( split, lastElement ), split[lastElement] );
}
}
Package pkg = procDefinition.getPackage();
// Package is null if class is in root package
String[] namespace = pkg == null ? new String[0] : pkg.getName().split( "\\." );
String name = m.getName();
return new QualifiedName( namespace, name );
}
private abstract static class ReflectiveBase
{
final List<FieldInjections.FieldSetter> fieldSetters;
ReflectiveBase( List<FieldInjections.FieldSetter> fieldSetters )
{
this.fieldSetters = fieldSetters;
}
protected void inject( Context ctx, Object object ) throws ProcedureException
{
for ( FieldInjections.FieldSetter setter : fieldSetters )
{
setter.apply( ctx, object );
}
}
protected Object[] args( int numberOfDeclaredArguments, Object cls, Object[] input )
{
Object[] args = new Object[numberOfDeclaredArguments + 1];
args[0] = cls;
System.arraycopy( input, 0, args, 1, numberOfDeclaredArguments );
return args;
}
}
private static class ReflectiveProcedure extends ReflectiveBase implements CallableProcedure
{
private final ProcedureSignature signature;
private final OutputMapper outputMapper;
private final MethodHandle constructor;
private final MethodHandle procedureMethod;
ReflectiveProcedure( ProcedureSignature signature, MethodHandle constructor,
MethodHandle procedureMethod, OutputMapper outputMapper,
List<FieldInjections.FieldSetter> fieldSetters )
{
super(fieldSetters );
this.constructor = constructor;
this.procedureMethod = procedureMethod;
this.signature = signature;
this.outputMapper = outputMapper;
}
@Override
public ProcedureSignature signature()
{
return signature;
}
@Override
public RawIterator<Object[],ProcedureException> apply( Context ctx, Object[] input ) throws ProcedureException
{
// For now, create a new instance of the class for each invocation. In the future, we'd like to keep
// instances local to
// at least the executing session, but we don't yet have good interfaces to the kernel to model that with.
try
{
int numberOfDeclaredArguments = signature.inputSignature().size();
if ( numberOfDeclaredArguments != input.length )
{
throw new ProcedureException( Status.Procedure.ProcedureCallFailed,
"Procedure `%s` takes %d arguments but %d was provided.",
signature.name(),
numberOfDeclaredArguments, input.length );
}
Object cls = constructor.invoke();
//API injection
inject( ctx, cls );
// Call the method
Object[] args = args( numberOfDeclaredArguments, cls, input );
Object rs = procedureMethod.invokeWithArguments( args );
// This also handles VOID
if ( rs == null )
{
return asRawIterator( emptyIterator() );
}
else
{
return new MappingIterator( ((Stream<?>) rs).iterator() );
}
}
catch ( Throwable throwable )
{
if ( throwable instanceof Status.HasStatus )
{
throw new ProcedureException( ((Status.HasStatus) throwable).status(), throwable,
throwable.getMessage() );
}
else
{
throw new ProcedureException( Status.Procedure.ProcedureCallFailed, throwable,
"Failed to invoke procedure `%s`: %s", signature.name(), "Caused by: " + throwable );
}
}
}
private class MappingIterator implements RawIterator<Object[],ProcedureException>
{
private final Iterator<?> out;
MappingIterator( Iterator<?> out )
{
this.out = out;
}
@Override
public boolean hasNext() throws ProcedureException
{
try
{
return out.hasNext();
}
catch ( RuntimeException e )
{
throw new ProcedureException( Status.Procedure.ProcedureCallFailed, e,
"Failed to call procedure `%s`: %s", signature, e.getMessage() );
}
}
@Override
public Object[] next() throws ProcedureException
{
try
{
Object record = out.next();
return outputMapper.apply( record );
}
catch ( RuntimeException e )
{
throw new ProcedureException( Status.Procedure.ProcedureCallFailed, e,
"Failed to call procedure `%s`: %s", signature, e.getMessage() );
}
}
}
}
private static class ReflectiveUserFunction extends ReflectiveBase implements CallableUserFunction
{
private final TypeMappers.NeoValueConverter valueConverter;
private final UserFunctionSignature signature;
private final MethodHandle constructor;
private final MethodHandle udfMethod;
ReflectiveUserFunction( UserFunctionSignature signature, MethodHandle constructor,
MethodHandle procedureMethod, TypeMappers.NeoValueConverter outputMapper,
List<FieldInjections.FieldSetter> fieldSetters )
{
super( fieldSetters );
this.constructor = constructor;
this.udfMethod = procedureMethod;
this.signature = signature;
this.valueConverter = outputMapper;
}
@Override
public UserFunctionSignature signature()
{
return signature;
}
@Override
public Object apply( Context ctx, Object[] input ) throws ProcedureException
{
// For now, create a new instance of the class for each invocation. In the future, we'd like to keep
// instances local to
// at least the executing session, but we don't yet have good interfaces to the kernel to model that with.
try
{
int numberOfDeclaredArguments = signature.inputSignature().size();
if ( numberOfDeclaredArguments != input.length )
{
throw new ProcedureException( Status.Procedure.ProcedureCallFailed,
"Function `%s` takes %d arguments but %d was provided.",
signature.name(),
numberOfDeclaredArguments, input.length );
}
Object cls = constructor.invoke();
//API injection
inject( ctx, cls );
// Call the method
Object[] args = args( numberOfDeclaredArguments, cls, input );
Object rs = udfMethod.invokeWithArguments( args );
return valueConverter.toNeoValue( rs );
}
catch ( Throwable throwable )
{
if ( throwable instanceof Status.HasStatus )
{
throw new ProcedureException( ((Status.HasStatus) throwable).status(), throwable,
throwable.getMessage() );
}
else
{
throw new ProcedureException( Status.Procedure.ProcedureCallFailed, throwable,
"Failed to invoke function `%s`: %s", signature.name(), "Caused by: " + throwable );
}
}
}
}
private static class ReflectiveUserAggregationFunction extends ReflectiveBase implements
CallableUserAggregationFunction
{
private final TypeMappers.NeoValueConverter valueConverter;
private final UserFunctionSignature signature;
private final MethodHandle constructor;
private final MethodHandle creator;
private final MethodHandle updateMethod;
private final MethodHandle resultMethod;
ReflectiveUserAggregationFunction( UserFunctionSignature signature, MethodHandle constructor,
MethodHandle creator, MethodHandle updateMethod, MethodHandle resultMethod,
TypeMappers.NeoValueConverter outputMapper,
List<FieldInjections.FieldSetter> fieldSetters )
{
super( fieldSetters );
this.constructor = constructor;
this.creator = creator;
this.updateMethod = updateMethod;
this.resultMethod = resultMethod;
this.signature = signature;
this.valueConverter = outputMapper;
}
@Override
public UserFunctionSignature signature()
{
return signature;
}
@Override
public Aggregator create( Context ctx) throws ProcedureException
{
// For now, create a new instance of the class for each invocation. In the future, we'd like to keep
// instances local to
// at least the executing session, but we don't yet have good interfaces to the kernel to model that with.
try
{
Object cls = constructor.invoke();
//API injection
inject( ctx, cls );
Object aggregator = creator.invoke( cls );
return new Aggregator()
{
@Override
public void update( Object[] input ) throws ProcedureException
{
try
{
int numberOfDeclaredArguments = signature.inputSignature().size();
if ( numberOfDeclaredArguments != input.length )
{
throw new ProcedureException( Status.Procedure.ProcedureCallFailed,
"Function `%s` takes %d arguments but %d was provided.",
signature.name(),
numberOfDeclaredArguments, input.length );
}
// Call the method
Object[] args = args( numberOfDeclaredArguments, aggregator, input );
updateMethod.invokeWithArguments( args );
}
catch ( Throwable throwable )
{
if ( throwable instanceof Status.HasStatus )
{
throw new ProcedureException( ((Status.HasStatus) throwable).status(), throwable,
throwable.getMessage() );
}
else
{
throw new ProcedureException( Status.Procedure.ProcedureCallFailed, throwable,
"Failed to invoke function `%s`: %s", signature.name(),
"Caused by: " + throwable );
}
}
}
@Override
public Object result() throws ProcedureException
{
try
{
return valueConverter.toNeoValue( resultMethod.invoke(aggregator) );
}
catch ( Throwable throwable )
{
if ( throwable instanceof Status.HasStatus )
{
throw new ProcedureException( ((Status.HasStatus) throwable).status(), throwable,
throwable.getMessage() );
}
else
{
throw new ProcedureException( Status.Procedure.ProcedureCallFailed, throwable,
"Failed to invoke function `%s`: %s", signature.name(),
"Caused by: " + throwable );
}
}
}
};
}
catch ( Throwable throwable )
{
if ( throwable instanceof Status.HasStatus )
{
throw new ProcedureException( ((Status.HasStatus) throwable).status(), throwable,
throwable.getMessage() );
}
else
{
throw new ProcedureException( Status.Procedure.ProcedureCallFailed, throwable,
"Failed to invoke function `%s`: %s", signature.name(),
"Caused by: " + throwable );
}
}
}
}
}