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com.blazebit.persistence.impl.ParameterManager Maven / Gradle / Ivy
/*
* Copyright 2014 - 2020 Blazebit.
*
* Licensed 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 com.blazebit.persistence.impl;
import com.blazebit.persistence.parser.expression.Expression;
import com.blazebit.persistence.parser.expression.ParameterExpression;
import com.blazebit.persistence.spi.AttributeAccessor;
import javax.persistence.Parameter;
import javax.persistence.Query;
import javax.persistence.TemporalType;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Collection;
import java.util.Collections;
import java.util.Date;
import java.util.EnumMap;
import java.util.HashMap;
import java.util.HashSet;
import java.util.IdentityHashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TreeMap;
/**
*
* @author Christian Beikov
* @author Moritz Becker
* @since 1.0.0
*/
public class ParameterManager {
private static final String PREFIX = "param_";
private int counter;
private final Map> parameters = new TreeMap<>();
private final Map valuesParameters = new TreeMap<>();
private final ParameterRegistrationVisitor parameterRegistrationVisitor;
private final ParameterUnregistrationVisitor parameterUnregistrationVisitor;
private int positionalOffset = -1; // Records the last positional parameter index that was used
public ParameterManager() {
this.parameterRegistrationVisitor = new ParameterRegistrationVisitor(this);
this.parameterUnregistrationVisitor = new ParameterUnregistrationVisitor(this);
}
public ParameterRegistrationVisitor getParameterRegistrationVisitor() {
return parameterRegistrationVisitor;
}
public void collectParameterRegistrations(AbstractCommonQueryBuilder queryBuilder, ClauseType clauseType) {
AbstractCommonQueryBuilder oldQueryBuilder = parameterRegistrationVisitor.getQueryBuilder();
ClauseType oldClauseType = parameterRegistrationVisitor.getClauseType();
try {
parameterRegistrationVisitor.setClauseType(clauseType);
parameterRegistrationVisitor.setQueryBuilder(queryBuilder);
queryBuilder.applyVisitor(parameterRegistrationVisitor);
} finally {
parameterRegistrationVisitor.setClauseType(oldClauseType);
parameterRegistrationVisitor.setQueryBuilder(oldQueryBuilder);
}
}
public void collectParameterRegistrations(Expression expression, ClauseType clauseType, AbstractCommonQueryBuilder queryBuilder) {
AbstractCommonQueryBuilder oldQueryBuilder = parameterRegistrationVisitor.getQueryBuilder();
ClauseType oldClauseType = parameterRegistrationVisitor.getClauseType();
try {
parameterRegistrationVisitor.setClauseType(clauseType);
parameterRegistrationVisitor.setQueryBuilder(queryBuilder);
expression.accept(parameterRegistrationVisitor);
} finally {
parameterRegistrationVisitor.setClauseType(oldClauseType);
parameterRegistrationVisitor.setQueryBuilder(oldQueryBuilder);
}
}
public void collectParameterUnregistrations(Expression expression, ClauseType clauseType, AbstractCommonQueryBuilder queryBuilder) {
AbstractCommonQueryBuilder oldQueryBuilder = parameterUnregistrationVisitor.getQueryBuilder();
ClauseType oldClauseType = parameterUnregistrationVisitor.getClauseType();
try {
parameterUnregistrationVisitor.setClauseType(clauseType);
parameterUnregistrationVisitor.setQueryBuilder(queryBuilder);
expression.accept(parameterUnregistrationVisitor);
} finally {
parameterUnregistrationVisitor.setClauseType(oldClauseType);
parameterUnregistrationVisitor.setQueryBuilder(oldQueryBuilder);
}
}
Map copyFrom(ParameterManager parameterManager) {
Map parameterMapping = new HashMap<>(parameterManager.parameters.size());
for (Map.Entry> entry : parameterManager.parameters.entrySet()) {
ParameterImpl param = (ParameterImpl) entry.getValue();
Object paramValue = null;
if (param.isValueSet()) {
if (param.getParameterValue() == null) {
paramValue = param.getValue();
} else {
paramValue = param.getParameterValue().copy();
}
}
String oldParameterName = entry.getKey();
String newParameterName;
if (Character.isDigit(oldParameterName.charAt(0))) {
this.positionalOffset++;
newParameterName = Integer.toString(this.positionalOffset);
} else if (param.isImplicit() && !(paramValue instanceof ValuesParameterWrapper)) {
newParameterName = PREFIX + counter++;
} else {
ParameterImpl existingParameter = (ParameterImpl) parameters.get(oldParameterName);
newParameterName = oldParameterName;
if (existingParameter != null) {
if (existingParameter.getParameterType() != param.getParameterType()) {
throw new IllegalStateException("Can't apply parameters! Parameter '" + oldParameterName + "' with type '" + param.getParameterType() + "' is incompatible with existing type: " + existingParameter.getParameterType());
}
if (existingParameter.isCollectionValued() != param.isCollectionValued()) {
throw new IllegalStateException("Can't apply parameters! Parameter '" + oldParameterName + "' is collection valued in one query, but not the other!");
}
if (existingParameter.getTranformer() != param.getTranformer()) {
throw new IllegalStateException("Can't apply parameters! Parameter '" + oldParameterName + "' has a tranfsformer in one query, but not the other!");
}
if (param.isValueSet()) {
existingParameter.setValue(paramValue);
}
continue;
}
}
parameterMapping.put(oldParameterName, newParameterName);
addParameterMapping(newParameterName, paramValue, param.isImplicit());
}
for (Map.Entry entry : parameterManager.valuesParameters.entrySet()) {
if (this.valuesParameters.put(entry.getKey(), entry.getValue()) != null) {
throw new IllegalArgumentException("Can't copy value parameters because of a name clash for value parameter with name: " + entry.getKey());
}
}
return parameterMapping;
}
Set getParameterListNames(Query q) {
return getParameterListNames(q, null);
}
Set getParameterListNames(Query q, String skippedParameterPrefix) {
Set parameterListNames = new HashSet();
collectParameterListNames(q, parameterListNames, skippedParameterPrefix);
return parameterListNames;
}
void collectParameterListNames(Query q, Set parameterListNames) {
collectParameterListNames(q, parameterListNames, null);
}
void collectParameterListNames(Query q, Set parameterListNames, String skippedParameterPrefix) {
for (Parameter p: q.getParameters()) {
String name = p.getName();
// In case of positional parameters, we convert the position to a string and look it up instead
if (name == null) {
name = p.getPosition().toString();
} else if (skippedParameterPrefix != null && name.startsWith(skippedParameterPrefix)) {
continue;
}
ParameterImpl parameter = getParameter(name);
if (parameter != null && parameter.isCollectionValued()) {
parameterListNames.add(name);
}
}
}
void parameterizeQuery(Query q) {
parameterizeQuery(q, null);
}
void parameterizeQuery(Query q, String skippedParameterPrefix) {
Set requestedValueParameters = new HashSet();
for (Parameter p : q.getParameters()) {
String parameterName = p.getName();
// In case of positional parameters, we convert the position to a string and look it up instead
if (parameterName == null) {
parameterName = p.getPosition().toString();
} else if (skippedParameterPrefix != null && parameterName.startsWith(skippedParameterPrefix)) {
continue;
}
ParameterImpl parameter = parameters.get(parameterName);
if (parameter == null) {
String valuesParameter = valuesParameters.get(parameterName);
if (valuesParameter == null) {
throw new IllegalArgumentException(String.format("Parameter name \"%s\" does not exist", parameterName));
}
// Skip binding the sub-parameter, we will do that in one go at the end
requestedValueParameters.add(valuesParameter);
continue;
}
// If a query requests the values parameter directly, it is aware of handling it
if (parameter.getParameterValue() instanceof ValuesParameterWrapper) {
if (parameter.getValue() != null) {
q.setParameter(parameterName, parameter.getValue());
}
} else {
parameter.bind(q);
}
}
for (String parameterName : requestedValueParameters) {
ParameterImpl parameter = parameters.get(parameterName);
parameter.bind(q);
}
}
@SuppressWarnings({ "unchecked", "rawtypes" })
public ParameterImpl getParameter(String parameterName) {
if (parameterName == null) {
throw new NullPointerException("parameterName");
}
ParameterImpl parameter = parameters.get(parameterName);
return parameter;
}
@SuppressWarnings({ "unchecked", "rawtypes" })
public Set> getParameters() {
return new HashSet>(parameters.values());
}
public Map getValuesParameters() {
return Collections.unmodifiableMap(valuesParameters);
}
public Map getTransformers() {
Map transformers = new HashMap<>();
for (Map.Entry> entry : parameters.entrySet()) {
ParameterValueTransformer transformer = entry.getValue().getTranformer();
if (transformer != null) {
transformers.put(entry.getKey(), transformer);
}
}
return transformers;
}
public Map getValuesBinders() {
Map binders = new HashMap<>();
for (Map.Entry> entry : parameters.entrySet()) {
ParameterValue value = entry.getValue().getParameterValue();
if (value instanceof ValuesParameterWrapper) {
binders.put(entry.getKey(), ((ValuesParameterWrapper) value).getBinder());
}
}
return binders;
}
public boolean containsParameter(String parameterName) {
if (parameterName == null) {
throw new NullPointerException("parameterName");
}
return parameters.containsKey(parameterName);
}
public boolean isParameterSet(String parameterName) {
if (parameterName == null) {
throw new NullPointerException("parameterName");
}
ParameterImpl parameter = parameters.get(parameterName);
return parameter != null && parameter.getValue() != null;
}
public Object getParameterValue(String parameterName) {
if (parameterName == null) {
throw new NullPointerException("parameterName");
}
ParameterImpl parameter = parameters.get(parameterName);
if (parameter == null) {
throw new IllegalArgumentException(String.format("Parameter name \"%s\" does not exist", parameterName));
}
return parameter.getValue();
}
public ParameterExpression addParameterExpression(Object o, ClauseType clause, AbstractCommonQueryBuilder queryBuilder) {
String name = addParameter(o, o instanceof Collection, clause, queryBuilder);
return new ParameterExpression(name, o, o instanceof Collection);
}
private String addParameter(Object o, boolean collectionValued, ClauseType clause, AbstractCommonQueryBuilder queryBuilder) {
if (o == null) {
throw new NullPointerException();
}
String name = PREFIX + counter++;
parameters.put(name, new ParameterImpl<>(name, collectionValued, clause, queryBuilder, o));
return name;
}
public void addParameterMapping(String parameterName, Object o, boolean implicit) {
if (parameterName == null) {
throw new NullPointerException("parameterName");
}
Integer position = determinePositionalOffset(parameterName);
if (position == null) {
parameters.put(parameterName, new ParameterImpl<>(parameterName, o instanceof Collection, implicit, o));
} else {
parameters.put(parameterName, new ParameterImpl<>(position, o instanceof Collection, implicit, o));
}
}
public void addParameterMapping(String parameterName, Object o, ClauseType clause, AbstractCommonQueryBuilder queryBuilder) {
if (parameterName == null) {
throw new NullPointerException("parameterName");
}
Integer position = determinePositionalOffset(parameterName);
if (position == null) {
parameters.put(parameterName, new ParameterImpl<>(parameterName, o instanceof Collection, clause, queryBuilder, o));
} else {
parameters.put(parameterName, new ParameterImpl<>(position, o instanceof Collection, clause, queryBuilder, o));
}
}
public void registerParameterName(String parameterName, boolean collectionValued, ClauseType clause, AbstractCommonQueryBuilder queryBuilder) {
if (parameterName == null) {
throw new NullPointerException("parameterName");
}
ParameterImpl parameter = parameters.get(parameterName);
if (parameter == null) {
Integer position = determinePositionalOffset(parameterName);
if (position == null) {
parameters.put(parameterName, new ParameterImpl<>(parameterName, collectionValued, false, clause, queryBuilder));
} else {
parameters.put(parameterName, new ParameterImpl<>(position, collectionValued, false, clause, queryBuilder));
}
} else {
Set> builders = parameter.getClauseTypes().get(clause);
if (builders == null) {
builders = Collections.newSetFromMap(new IdentityHashMap, Boolean>());
parameter.getClauseTypes().put(clause, builders);
}
builders.add(queryBuilder);
}
}
private Integer determinePositionalOffset(String parameterName) {
if (Character.isDigit(parameterName.charAt(0))) {
int value = Integer.parseInt(parameterName);
positionalOffset = Math.max(value, positionalOffset);
return value;
}
return null;
}
public void unregisterParameterName(String parameterName, ClauseType clauseType, AbstractCommonQueryBuilder queryBuilder) {
ParameterImpl parameter = parameters.get(parameterName);
if (parameter != null) {
Set> builders = parameter.getClauseTypes().get(clauseType);
if (builders != null) {
builders.remove(queryBuilder);
if (builders.isEmpty()) {
parameter.getClauseTypes().remove(clauseType);
if (parameter.getClauseTypes().isEmpty()) {
parameters.remove(parameterName);
}
}
}
}
}
public void registerValuesParameter(String parameterName, Class type, String[][] parameterNames, AttributeAccessor[] pathExpressions, AbstractCommonQueryBuilder queryBuilder) {
if (parameterName == null) {
throw new NullPointerException("parameterName");
}
if (parameters.containsKey(parameterName)) {
throw new IllegalArgumentException("Can't register parameter for VALUES clause because there already exists a parameter with the name: " + parameterName);
}
parameters.put(parameterName, new ParameterImpl(parameterName, false, ClauseType.JOIN, queryBuilder, new ValuesParameterWrapper(type, parameterNames, pathExpressions)));
for (int i = 0; i < parameterNames.length; i++) {
for (int j = 0; j < parameterNames[i].length; j++) {
valuesParameters.put(parameterNames[i][j], parameterName);
}
}
}
@SuppressWarnings({ "rawtypes", "unchecked" })
public void satisfyParameter(String parameterName, Object parameterValue) {
if (parameterName == null) {
throw new NullPointerException("parameterName");
}
ParameterImpl parameter = parameters.get(parameterName);
if (parameter == null) {
throw new IllegalArgumentException(String.format("Parameter name \"%s\" does not exist", parameterName));
}
parameter.setValue(parameterValue);
}
@SuppressWarnings({ "rawtypes", "unchecked" })
public void satisfyParameter(String parameterName, Calendar value, TemporalType temporalType) {
if (parameterName == null) {
throw new NullPointerException("parameterName");
}
ParameterImpl parameter = parameters.get(parameterName);
if (parameter == null) {
throw new IllegalArgumentException(String.format("Parameter name \"%s\" does not exist", parameterName));
}
parameter.setValue(new TemporalCalendarParameterWrapper(temporalType, value));
}
@SuppressWarnings({ "rawtypes", "unchecked" })
public void satisfyParameter(String parameterName, Date value, TemporalType temporalType) {
if (parameterName == null) {
throw new NullPointerException("parameterName");
}
ParameterImpl parameter = parameters.get(parameterName);
if (parameter == null) {
throw new IllegalArgumentException(String.format("Parameter name \"%s\" does not exist", parameterName));
}
parameter.setValue(new TemporalDateParameterWrapper(temporalType, value));
}
@SuppressWarnings({ "unchecked" })
public void setParameterType(String parameterName, Class type) {
if (parameterName == null) {
throw new NullPointerException("parameterName");
}
ParameterImpl parameter = parameters.get(parameterName);
if (parameter == null) {
throw new IllegalArgumentException(String.format("Parameter name \"%s\" does not exist", parameterName));
}
// TODO: maybe we should do some checks here?
parameter.setParameterType((Class) type);
}
public int getPositionalOffset() {
if (positionalOffset == -1) {
return -1;
}
return positionalOffset + 1;
}
// TODO: needs equals-hashCode implementation
/**
* @author Christian Beikov
* @since 1.2.0
*/
static final class ParameterImpl implements ExtendedParameter {
private final String name;
private final Integer position;
private final boolean collectionValued;
private final boolean implicit;
private final Map>> clauseTypes;
private Class parameterType;
private T value;
private boolean valueSet;
private ParameterValueTransformer tranformer;
public ParameterImpl(String name, boolean collectionValued, boolean implicit, ClauseType clause, AbstractCommonQueryBuilder queryBuilder) {
this.name = name;
this.position = null;
this.collectionValued = collectionValued;
this.implicit = implicit;
this.clauseTypes = new EnumMap<>(ClauseType.class);
if (clause != null) {
Set> builders = Collections.newSetFromMap(new IdentityHashMap, Boolean>());
builders.add(queryBuilder);
this.clauseTypes.put(clause, builders);
}
}
public ParameterImpl(String name, boolean collectionValued, boolean implicit, T value) {
this(name, collectionValued, implicit, null, null);
setValue(value);
}
public ParameterImpl(String name, boolean collectionValued, ClauseType clause, AbstractCommonQueryBuilder queryBuilder, T value) {
this(name, collectionValued, true, clause, queryBuilder);
setValue(value);
}
public ParameterImpl(int position, boolean collectionValued, boolean implicit, ClauseType clause, AbstractCommonQueryBuilder queryBuilder) {
this.name = null;
this.position = position;
this.collectionValued = collectionValued;
this.implicit = implicit;
this.clauseTypes = new EnumMap<>(ClauseType.class);
if (clause != null) {
Set> builders = Collections.newSetFromMap(new IdentityHashMap, Boolean>());
builders.add(queryBuilder);
this.clauseTypes.put(clause, builders);
}
}
public ParameterImpl(int position, boolean collectionValued, boolean implicit, T value) {
this(position, collectionValued, implicit, null, null);
setValue(value);
}
public ParameterImpl(int position, boolean collectionValued, ClauseType clause, AbstractCommonQueryBuilder queryBuilder, T value) {
this(position, collectionValued, true, clause, queryBuilder);
setValue(value);
}
@Override
public String getName() {
return name;
}
@Override
public Integer getPosition() {
return position;
}
@Override
public boolean isCollectionValued() {
return collectionValued;
}
public Map>> getClauseTypes() {
return clauseTypes;
}
@Override
public Class getParameterType() {
return parameterType;
}
public void setParameterType(Class parameterType) {
this.parameterType = parameterType;
}
public ParameterValue getParameterValue() {
if (value instanceof ParameterValue) {
return (ParameterValue) value;
}
return null;
}
public boolean isImplicit() {
return implicit;
}
public boolean isValueSet() {
return valueSet;
}
@SuppressWarnings("unchecked")
public T getValue() {
if (value instanceof ParameterValue) {
return (T) ((ParameterValue) value).getValue();
}
return value;
}
@SuppressWarnings({ "unchecked" })
public void setValue(T value) {
this.valueSet = true;
if (tranformer != null) {
value = transform(value);
}
if (this.value instanceof ParameterValue) {
this.value = (T) ((ParameterValue) this.value).withValue(value);
} else {
this.value = value;
if (value != null) {
if (value instanceof ParameterValue) {
parameterType = (Class) ((ParameterValue) value).getValueType();
} else {
parameterType = (Class) value.getClass();
}
}
}
}
@SuppressWarnings("unchecked")
private T transform(T value) {
if (value instanceof Collection) {
Collection values = (Collection) value;
List list = new ArrayList<>(values.size());
for (Object o : values) {
list.add(tranformer.transform(o));
}
return (T) list;
} else {
return (T) tranformer.transform(value);
}
}
public ParameterValueTransformer getTranformer() {
return tranformer;
}
public void setTranformer(ParameterValueTransformer tranformer) {
if (this.tranformer == null) {
this.tranformer = tranformer;
if (valueSet) {
this.value = transform(value);
}
} else if (!this.tranformer.equals(tranformer)) {
throw new IllegalStateException("Tried to set parameter value transformer [" + tranformer + "] although a transformer [" + this.tranformer + "] is already set for parameter: " + name);
}
}
public void bind(Query q) {
if (valueSet) {
if (value instanceof ParameterValue) {
if (name == null) {
((ParameterValue) value).bind(q, position);
} else {
((ParameterValue) value).bind(q, name);
}
} else {
if (name == null) {
q.setParameter(position, value);
} else {
q.setParameter(name, value);
}
}
}
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (!(o instanceof Parameter)) {
return false;
}
Parameter parameter = (Parameter) o;
if (name != null ? !name.equals(parameter.getName()) : parameter.getName() != null) {
return false;
}
return position != null ? position.equals(parameter.getPosition()) : parameter.getPosition() == null;
}
@Override
public int hashCode() {
int result = name != null ? name.hashCode() : 0;
result = 31 * result + (position != null ? position.hashCode() : 0);
return result;
}
}
/**
* @author Christian Beikov
* @since 1.2.0
*/
static interface ParameterValue {
public ParameterValue copy();
public Class getValueType();
public Object getValue();
public ParameterValue withValue(Object value);
public void bind(Query query, String name);
public void bind(Query query, int position);
}
/**
* @author Christian Beikov
* @since 1.2.0
*/
static final class TemporalCalendarParameterWrapper implements ParameterValue {
private final TemporalType type;
private Calendar value;
public TemporalCalendarParameterWrapper(TemporalType type, Calendar value) {
this.type = type;
this.value = value;
}
@Override
public ParameterValue copy() {
Calendar newValue = null;
if (value != null) {
newValue = (Calendar) value.clone();
}
return new TemporalCalendarParameterWrapper(type, newValue);
}
@Override
public Calendar getValue() {
return value;
}
@Override
public ParameterValue withValue(Object value) {
this.value = (Calendar) value;
return this;
}
@Override
public Class getValueType() {
return Calendar.class;
}
@Override
public void bind(Query query, String name) {
query.setParameter(name, value, type);
}
@Override
public void bind(Query query, int position) {
query.setParameter(position, value, type);
}
}
/**
* @author Christian Beikov
* @since 1.2.0
*/
static final class TemporalDateParameterWrapper implements ParameterValue {
private final TemporalType type;
private Date value;
public TemporalDateParameterWrapper(TemporalType type, Date value) {
this.type = type;
this.value = value;
}
@Override
public ParameterValue copy() {
Date newValue = null;
if (value != null) {
newValue = (Date) value.clone();
}
return new TemporalDateParameterWrapper(type, newValue);
}
@Override
public Date getValue() {
return value;
}
@Override
public ParameterValue withValue(Object value) {
this.value = (Date) value;
return this;
}
@Override
public Class getValueType() {
return Date.class;
}
@Override
public void bind(Query query, String name) {
query.setParameter(name, value, type);
}
@Override
public void bind(Query query, int position) {
query.setParameter(position, value, type);
}
}
/**
* @author Christian Beikov
* @since 1.2.0
*/
static final class ValuesParameterWrapper implements ParameterValue {
private final Class type;
private final ValuesParameterBinder binder;
private Collection value;
public ValuesParameterWrapper(Class type, String[][] parameterNames, AttributeAccessor[] pathExpressions) {
this.type = type;
this.binder = new ValuesParameterBinder(parameterNames, pathExpressions);
}
private ValuesParameterWrapper(Class type, ValuesParameterBinder binder) {
this.type = type;
this.binder = binder;
}
@Override
public ParameterValue copy() {
Collection newValue = null;
if (value != null) {
newValue = new ArrayList(value);
}
return new ValuesParameterWrapper(type, binder).withValue(newValue);
}
public ValuesParameterBinder getBinder() {
return binder;
}
@Override
public Object getValue() {
return value;
}
@Override
public Class getValueType() {
return Collection.class;
}
@Override
public ParameterValue withValue(Object value) {
if (value == null) {
throw new IllegalArgumentException("null not allowed for VALUES parameter!");
}
if (!(value instanceof Collection)) {
throw new IllegalArgumentException("Value for VALUES parameter must be a collection! Unsupported type: " + value.getClass());
}
@SuppressWarnings("unchecked")
Collection collection = (Collection) value;
if (collection.size() > binder.size()) {
throw new IllegalArgumentException("The size of the collection must be lower or equal to the specified size for the VALUES clause.");
}
// NOTE: be careful when changing this, there might be code that depends on this not being copied for performance
this.value = collection;
return this;
}
@Override
public void bind(Query query, String name) {
if (value == null) {
throw new IllegalArgumentException("No values are bound for parameter with name: " + name);
}
binder.bind(query, value);
}
@Override
public void bind(Query query, int position) {
if (value == null) {
throw new IllegalArgumentException("No values are bound for parameter with position: " + position);
}
binder.bind(query, value);
}
}
}