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An annotation processor for generating type-safe bean mappers
/*
* Copyright MapStruct Authors.
*
* Licensed under the Apache License version 2.0, available at http://www.apache.org/licenses/LICENSE-2.0
*/
package org.mapstruct.ap.internal.model;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Objects;
import java.util.Set;
import javax.lang.model.element.AnnotationMirror;
import org.mapstruct.ap.internal.model.assignment.AdderWrapper;
import org.mapstruct.ap.internal.model.assignment.ArrayCopyWrapper;
import org.mapstruct.ap.internal.model.assignment.EnumConstantWrapper;
import org.mapstruct.ap.internal.model.assignment.GetterWrapperForCollectionsAndMaps;
import org.mapstruct.ap.internal.model.assignment.SetterWrapper;
import org.mapstruct.ap.internal.model.assignment.StreamAdderWrapper;
import org.mapstruct.ap.internal.model.assignment.UpdateWrapper;
import org.mapstruct.ap.internal.model.beanmapping.MappingReferences;
import org.mapstruct.ap.internal.model.beanmapping.PropertyEntry;
import org.mapstruct.ap.internal.model.beanmapping.SourceReference;
import org.mapstruct.ap.internal.model.common.Assignment;
import org.mapstruct.ap.internal.model.common.BuilderType;
import org.mapstruct.ap.internal.model.common.FormattingParameters;
import org.mapstruct.ap.internal.model.common.ModelElement;
import org.mapstruct.ap.internal.model.common.Parameter;
import org.mapstruct.ap.internal.model.common.SourceRHS;
import org.mapstruct.ap.internal.model.common.Type;
import org.mapstruct.ap.internal.model.source.DelegatingOptions;
import org.mapstruct.ap.internal.model.source.MappingControl;
import org.mapstruct.ap.internal.model.source.MappingOptions;
import org.mapstruct.ap.internal.model.source.Method;
import org.mapstruct.ap.internal.model.source.SelectionParameters;
import org.mapstruct.ap.internal.model.source.selector.SelectionCriteria;
import org.mapstruct.ap.internal.gem.BuilderGem;
import org.mapstruct.ap.internal.gem.NullValueCheckStrategyGem;
import org.mapstruct.ap.internal.gem.NullValuePropertyMappingStrategyGem;
import org.mapstruct.ap.internal.util.Message;
import org.mapstruct.ap.internal.util.NativeTypes;
import org.mapstruct.ap.internal.util.Strings;
import org.mapstruct.ap.internal.util.ValueProvider;
import org.mapstruct.ap.internal.util.accessor.Accessor;
import org.mapstruct.ap.internal.util.accessor.AccessorType;
import static org.mapstruct.ap.internal.model.ForgedMethod.forElementMapping;
import static org.mapstruct.ap.internal.model.ForgedMethod.forParameterMapping;
import static org.mapstruct.ap.internal.model.ForgedMethod.forPropertyMapping;
import static org.mapstruct.ap.internal.model.common.Assignment.AssignmentType.DIRECT;
import static org.mapstruct.ap.internal.gem.NullValuePropertyMappingStrategyGem.SET_TO_DEFAULT;
import static org.mapstruct.ap.internal.gem.NullValuePropertyMappingStrategyGem.SET_TO_NULL;
/**
* Represents the mapping between a source and target property, e.g. from {@code String Source#foo} to
* {@code int Target#bar}. Name and type of source and target property can differ. If they have different types, the
* mapping must either refer to a mapping method or a conversion.
*
* @author Gunnar Morling
*/
public class PropertyMapping extends ModelElement {
private final String name;
private final String sourceBeanName;
private final String targetWriteAccessorName;
private final ValueProvider targetReadAccessorProvider;
private final Type targetType;
private final Assignment assignment;
private final Set dependsOn;
private final Assignment defaultValueAssignment;
private final boolean constructorMapping;
@SuppressWarnings("unchecked")
private static class MappingBuilderBase> extends AbstractBaseBuilder {
protected Accessor targetWriteAccessor;
protected AccessorType targetWriteAccessorType;
protected Type targetType;
protected BuilderType targetBuilderType;
protected Accessor targetReadAccessor;
protected String targetPropertyName;
protected String sourcePropertyName;
protected Set dependsOn;
protected Set existingVariableNames;
protected AnnotationMirror positionHint;
MappingBuilderBase(Class selfType) {
super( selfType );
}
public T sourceMethod(Method sourceMethod) {
return super.method( sourceMethod );
}
public T target(String targetPropertyName, Accessor targetReadAccessor, Accessor targetWriteAccessor) {
this.targetPropertyName = targetPropertyName;
this.targetReadAccessor = targetReadAccessor;
this.targetWriteAccessor = targetWriteAccessor;
this.targetType = ctx.getTypeFactory().getType( targetWriteAccessor.getAccessedType() );
BuilderGem builder = method.getOptions().getBeanMapping().getBuilder();
this.targetBuilderType = ctx.getTypeFactory().builderTypeFor( this.targetType, builder );
this.targetWriteAccessorType = targetWriteAccessor.getAccessorType();
return (T) this;
}
T mirror(AnnotationMirror mirror) {
this.positionHint = mirror;
return (T) this;
}
public T sourcePropertyName(String sourcePropertyName) {
this.sourcePropertyName = sourcePropertyName;
return (T) this;
}
public T dependsOn(Set dependsOn) {
this.dependsOn = dependsOn;
return (T) this;
}
public T existingVariableNames(Set existingVariableNames) {
this.existingVariableNames = existingVariableNames;
return (T) this;
}
protected boolean isFieldAssignment() {
return targetWriteAccessorType.isFieldAssignment();
}
}
public static class PropertyMappingBuilder extends MappingBuilderBase {
// initial properties
private String defaultValue;
private String defaultJavaExpression;
private SourceReference sourceReference;
private SourceRHS rightHandSide;
private FormattingParameters formattingParameters;
private SelectionParameters selectionParameters;
private MappingControl mappingControl;
private MappingReferences forgeMethodWithMappingReferences;
private boolean forceUpdateMethod;
private boolean forgedNamedBased = true;
private NullValueCheckStrategyGem nvcs;
private NullValuePropertyMappingStrategyGem nvpms;
PropertyMappingBuilder() {
super( PropertyMappingBuilder.class );
}
public PropertyMappingBuilder sourceReference(SourceReference sourceReference) {
this.sourceReference = sourceReference;
return this;
}
public PropertyMappingBuilder selectionParameters(SelectionParameters selectionParameters) {
this.selectionParameters = selectionParameters;
return this;
}
public PropertyMappingBuilder formattingParameters(FormattingParameters formattingParameters) {
this.formattingParameters = formattingParameters;
return this;
}
public PropertyMappingBuilder defaultValue(String defaultValue) {
this.defaultValue = defaultValue;
return this;
}
public PropertyMappingBuilder defaultJavaExpression(String defaultJavaExpression) {
this.defaultJavaExpression = defaultJavaExpression;
return this;
}
public PropertyMappingBuilder forgeMethodWithMappingReferences(MappingReferences mappingReferences) {
this.forgeMethodWithMappingReferences = mappingReferences;
return this;
}
/**
* Force the created mapping to use update methods when forging a method.
*
* @param forceUpdateMethod whether the mapping should force update method for forged mappings
* @return the builder for chaining
*/
public PropertyMappingBuilder forceUpdateMethod(boolean forceUpdateMethod) {
this.forceUpdateMethod = forceUpdateMethod;
return this;
}
/**
* @param forgedNamedBased mapping is based on forging
*
* @return the builder for chaining
*/
public PropertyMappingBuilder forgedNamedBased(boolean forgedNamedBased) {
this.forgedNamedBased = forgedNamedBased;
return this;
}
public PropertyMappingBuilder options(DelegatingOptions options) {
this.mappingControl = options.getMappingControl( ctx.getElementUtils() );
this.nvcs = options.getNullValueCheckStrategy();
if ( method.isUpdateMethod() ) {
this.nvpms = options.getNullValuePropertyMappingStrategy();
}
return this;
}
public PropertyMapping build() {
// handle source
this.rightHandSide = getSourceRHS( sourceReference );
ctx.getMessager().note( 2, Message.PROPERTYMAPPING_MAPPING_NOTE, rightHandSide, targetWriteAccessor );
rightHandSide.setUseElementAsSourceTypeForMatching(
targetWriteAccessorType == AccessorType.ADDER );
// all the tricky cases will be excluded for the time being.
boolean preferUpdateMethods;
if ( targetWriteAccessorType == AccessorType.ADDER ) {
preferUpdateMethods = false;
}
else {
preferUpdateMethods = method.getMappingTargetParameter() != null;
}
SelectionCriteria criteria = SelectionCriteria.forMappingMethods(
selectionParameters,
mappingControl,
targetPropertyName,
preferUpdateMethods
);
// forge a method instead of resolving one when there are mapping options.
Assignment assignment = null;
if ( forgeMethodWithMappingReferences == null ) {
assignment = ctx.getMappingResolver().getTargetAssignment(
method,
targetType,
formattingParameters,
criteria,
rightHandSide,
positionHint,
this::forge
);
}
else {
assignment = forge();
}
Type sourceType = rightHandSide.getSourceType();
if ( assignment != null ) {
ctx.getMessager().note( 2, Message.PROPERTYMAPPING_SELECT_NOTE, assignment );
if ( targetType.isCollectionOrMapType() ) {
assignment = assignToCollection( targetType, targetWriteAccessorType, assignment );
}
else if ( targetType.isArrayType() && sourceType.isArrayType() && assignment.getType() == DIRECT ) {
assignment = assignToArray( targetType, assignment );
}
else {
assignment = assignToPlain( targetType, targetWriteAccessorType, assignment );
}
}
else {
reportCannotCreateMapping();
}
return new PropertyMapping(
targetPropertyName,
rightHandSide.getSourceParameterName(),
targetWriteAccessor.getSimpleName(),
ValueProvider.of( targetReadAccessor ),
targetType,
assignment,
dependsOn,
getDefaultValueAssignment( assignment ),
targetWriteAccessorType == AccessorType.PARAMETER
);
}
private Assignment forge( ) {
Assignment assignment;
Type sourceType = rightHandSide.getSourceType();
if ( (sourceType.isCollectionType() || sourceType.isArrayType()) && targetType.isIterableType() ) {
assignment = forgeIterableMapping( sourceType, targetType, rightHandSide );
}
else if ( sourceType.isMapType() && targetType.isMapType() ) {
assignment = forgeMapMapping( sourceType, targetType, rightHandSide );
}
else if ( ( sourceType.isIterableType() && targetType.isStreamType() )
|| ( sourceType.isStreamType() && targetType.isStreamType() )
|| ( sourceType.isStreamType() && targetType.isIterableType() ) ) {
assignment = forgeStreamMapping( sourceType, targetType, rightHandSide );
}
else {
assignment = forgeMapping( rightHandSide );
}
if ( assignment != null ) {
ctx.getMessager().note( 2, Message.PROPERTYMAPPING_CREATE_NOTE, assignment );
}
return assignment;
}
/**
* Report that a mapping could not be created.
*/
private void reportCannotCreateMapping() {
if ( forgeMethodWithMappingReferences != null && ctx.isErroneous() ) {
// If we arrived here, there is an error it means that we couldn't forge a mapping method
// so skip the cannot create mapping
return;
}
if ( method instanceof ForgedMethod && ( (ForgedMethod) method ).getHistory() != null ) {
// The history that is part of the ForgedMethod misses the information from the current right hand
// side. Therefore we need to extract the most relevant history and use that in the error reporting.
ForgedMethodHistory history = getForgedMethodHistory( rightHandSide );
reportCannotCreateMapping(
method,
positionHint,
history.createSourcePropertyErrorMessage(),
history.getSourceType(),
history.getTargetType(),
history.createTargetPropertyName()
);
}
else {
reportCannotCreateMapping(
method,
positionHint,
rightHandSide.getSourceErrorMessagePart(),
rightHandSide.getSourceType(),
targetType,
targetPropertyName
);
}
}
private Assignment getDefaultValueAssignment( Assignment rhs ) {
if ( defaultValue != null
&& ( !rhs.getSourceType().isPrimitive() || rhs.getSourcePresenceCheckerReference() != null) ) {
// cannot check on null source if source is primitive unless it has a presence checker
PropertyMapping build = new ConstantMappingBuilder()
.constantExpression( defaultValue )
.formattingParameters( formattingParameters )
.selectionParameters( selectionParameters )
.dependsOn( dependsOn )
.existingVariableNames( existingVariableNames )
.mappingContext( ctx )
.sourceMethod( method )
.target( targetPropertyName, targetReadAccessor, targetWriteAccessor )
.build();
return build.getAssignment();
}
if ( defaultJavaExpression != null
&& ( !rhs.getSourceType().isPrimitive() || rhs.getSourcePresenceCheckerReference() != null) ) {
// cannot check on null source if source is primitive unless it has a presence checker
PropertyMapping build = new JavaExpressionMappingBuilder()
.javaExpression( defaultJavaExpression )
.dependsOn( dependsOn )
.existingVariableNames( existingVariableNames )
.mappingContext( ctx )
.sourceMethod( method )
.target( targetPropertyName, targetReadAccessor, targetWriteAccessor )
.build();
return build.getAssignment();
}
return null;
}
private Assignment assignToPlain(Type targetType, AccessorType targetAccessorType,
Assignment rightHandSide) {
Assignment result;
if ( targetAccessorType == AccessorType.SETTER || targetAccessorType.isFieldAssignment() ) {
result = assignToPlainViaSetter( targetType, rightHandSide );
}
else {
result = assignToPlainViaAdder( rightHandSide );
}
return result;
}
private Assignment assignToPlainViaSetter(Type targetType, Assignment rhs) {
if ( rhs.isCallingUpdateMethod() ) {
if ( targetReadAccessor == null ) {
ctx.getMessager().printMessage(
method.getExecutable(),
positionHint,
Message.PROPERTYMAPPING_NO_READ_ACCESSOR_FOR_TARGET_TYPE,
targetPropertyName
);
}
Assignment factory = ObjectFactoryMethodResolver
.getFactoryMethod( method, targetType, SelectionParameters.forSourceRHS( rightHandSide ), ctx );
return new UpdateWrapper(
rhs,
method.getThrownTypes(),
factory,
isFieldAssignment(),
targetType,
!rhs.isSourceReferenceParameter(),
nvpms == SET_TO_NULL && !targetType.isPrimitive(),
nvpms == SET_TO_DEFAULT
);
}
else {
boolean includeSourceNullCheck = SetterWrapper.doSourceNullCheck( rhs, nvcs, nvpms, targetType );
if ( !includeSourceNullCheck ) {
// solution for #834 introduced a local var and null check for nested properties always.
// however, a local var is not needed if there's no need to check for null.
rhs.setSourceLocalVarName( null );
}
return new SetterWrapper(
rhs,
method.getThrownTypes(),
isFieldAssignment(),
includeSourceNullCheck,
includeSourceNullCheck && nvpms == SET_TO_NULL && !targetType.isPrimitive(),
nvpms == SET_TO_DEFAULT );
}
}
private Assignment assignToPlainViaAdder( Assignment rightHandSide) {
Assignment result = rightHandSide;
String adderIteratorName = sourcePropertyName == null ? targetPropertyName : sourcePropertyName;
if ( result.getSourceType().isCollectionType() ) {
result = new AdderWrapper( result, method.getThrownTypes(), isFieldAssignment(), adderIteratorName );
}
else if ( result.getSourceType().isStreamType() ) {
result = new StreamAdderWrapper(
result, method.getThrownTypes(), isFieldAssignment(), adderIteratorName );
}
else {
// Possibly adding null to a target collection. So should be surrounded by an null check.
// TODO: what triggers this else branch? Should nvcs, nvpms be applied?
result = new SetterWrapper( result,
method.getThrownTypes(),
isFieldAssignment(),
true,
nvpms == SET_TO_NULL && !targetType.isPrimitive(),
nvpms == SET_TO_DEFAULT
);
}
return result;
}
private Assignment assignToCollection(Type targetType, AccessorType targetAccessorType,
Assignment rhs) {
return new CollectionAssignmentBuilder()
.mappingBuilderContext( ctx )
.method( method )
.targetReadAccessor( targetReadAccessor )
.targetType( targetType )
.targetPropertyName( targetPropertyName )
.targetAccessorType( targetAccessorType )
.rightHandSide( rightHandSide )
.assignment( rhs )
.nullValueCheckStrategy( nvcs )
.nullValuePropertyMappingStrategy( nvpms )
.build();
}
private Assignment assignToArray(Type targetType, Assignment rightHandSide) {
Type arrayType = ctx.getTypeFactory().getType( Arrays.class );
//TODO init default value
return new ArrayCopyWrapper(
rightHandSide,
targetPropertyName,
arrayType,
targetType,
isFieldAssignment(),
nvpms == SET_TO_NULL && !targetType.isPrimitive(),
nvpms == SET_TO_DEFAULT );
}
private SourceRHS getSourceRHS( SourceReference sourceReference ) {
Parameter sourceParam = sourceReference.getParameter();
PropertyEntry propertyEntry = sourceReference.getDeepestProperty();
// parameter reference
if ( propertyEntry == null ) {
return new SourceRHS( sourceParam.getName(),
sourceParam.getType(),
existingVariableNames,
sourceReference.toString()
);
}
// simple property
else if ( !sourceReference.isNested() ) {
String sourceRef = sourceParam.getName() + "." + ValueProvider.of( propertyEntry.getReadAccessor() );
return new SourceRHS( sourceParam.getName(),
sourceRef,
getSourcePresenceCheckerRef( sourceReference ),
propertyEntry.getType(),
existingVariableNames,
sourceReference.toString()
);
}
// nested property given as dot path
else {
Type sourceType = propertyEntry.getType();
if ( sourceType.isPrimitive() && !targetType.isPrimitive() ) {
// Handle null's. If the forged method needs to be mapped to an object, the forged method must be
// able to return null. So in that case primitive types are mapped to their corresponding wrapped
// type. The source type becomes the wrapped type in that case.
sourceType = ctx.getTypeFactory().getWrappedType( sourceType );
}
// forge a method from the parameter type to the last entry type.
String forgedName = Strings.joinAndCamelize( sourceReference.getElementNames() );
forgedName = Strings.getSafeVariableName( forgedName, ctx.getReservedNames() );
Type sourceParameterType = sourceReference.getParameter().getType();
ForgedMethod methodRef = forParameterMapping( forgedName, sourceParameterType, sourceType, method );
NestedPropertyMappingMethod.Builder builder = new NestedPropertyMappingMethod.Builder();
NestedPropertyMappingMethod nestedPropertyMapping = builder
.method( methodRef )
.propertyEntries( sourceReference.getPropertyEntries() )
.mappingContext( ctx )
.build();
// add if not yet existing
if ( !ctx.getMappingsToGenerate().contains( nestedPropertyMapping ) ) {
ctx.getMappingsToGenerate().add( nestedPropertyMapping );
}
else {
forgedName = ctx.getExistingMappingMethod( nestedPropertyMapping ).getName();
}
String sourceRef = forgedName + "( " + sourceParam.getName() + " )";
SourceRHS sourceRhs = new SourceRHS( sourceParam.getName(),
sourceRef,
getSourcePresenceCheckerRef( sourceReference ),
sourceType,
existingVariableNames,
sourceReference.toString()
);
// create a local variable to which forged method can be assigned.
String desiredName = propertyEntry.getName();
sourceRhs.setSourceLocalVarName( sourceRhs.createUniqueVarName( desiredName ) );
return sourceRhs;
}
}
private String getSourcePresenceCheckerRef( SourceReference sourceReference ) {
String sourcePresenceChecker = null;
if ( !sourceReference.getPropertyEntries().isEmpty() ) {
Parameter sourceParam = sourceReference.getParameter();
// TODO is first correct here?? shouldn't it be last since the remainer is checked
// in the forged method?
PropertyEntry propertyEntry = sourceReference.getShallowestProperty();
if ( propertyEntry.getPresenceChecker() != null ) {
sourcePresenceChecker = sourceParam.getName()
+ "." + propertyEntry.getPresenceChecker().getSimpleName() + "()";
String variableName = sourceParam.getName() + "."
+ propertyEntry.getReadAccessor().getSimpleName() + "()";
for (int i = 1; i < sourceReference.getPropertyEntries().size(); i++) {
PropertyEntry entry = sourceReference.getPropertyEntries().get( i );
if (entry.getPresenceChecker() != null && entry.getReadAccessor() != null) {
sourcePresenceChecker += " && " + variableName + " != null && "
+ variableName + "." + entry.getPresenceChecker().getSimpleName() + "()";
variableName = variableName + "." + entry.getReadAccessor().getSimpleName() + "()";
}
else {
break;
}
}
}
}
return sourcePresenceChecker;
}
private Assignment forgeStreamMapping(Type sourceType, Type targetType, SourceRHS source) {
StreamMappingMethod.Builder builder = new StreamMappingMethod.Builder();
return forgeWithElementMapping( sourceType, targetType, source, builder );
}
private Assignment forgeIterableMapping(Type sourceType, Type targetType, SourceRHS source) {
IterableMappingMethod.Builder builder = new IterableMappingMethod.Builder();
return forgeWithElementMapping( sourceType, targetType, source, builder );
}
private Assignment forgeWithElementMapping(Type sourceType, Type targetType, SourceRHS source,
ContainerMappingMethodBuilder builder) {
targetType = targetType.withoutBounds();
ForgedMethod methodRef = prepareForgedMethod( sourceType, targetType, source, "[]" );
ContainerMappingMethod iterableMappingMethod = builder
.mappingContext( ctx )
.method( methodRef )
.selectionParameters( selectionParameters )
.callingContextTargetPropertyName( targetPropertyName )
.build();
return createForgedAssignment( source, methodRef, iterableMappingMethod );
}
private ForgedMethod prepareForgedMethod(Type sourceType, Type targetType, SourceRHS source, String suffix) {
String name = getName( sourceType, targetType );
name = Strings.getSafeVariableName( name, ctx.getReservedNames() );
// copy mapper configuration from the source method, its the same mapper
ForgedMethodHistory forgedMethodHistory = getForgedMethodHistory( source, suffix );
return forElementMapping( name, sourceType, targetType, method, forgedMethodHistory, forgedNamedBased );
}
private Assignment forgeMapMapping(Type sourceType, Type targetType, SourceRHS source) {
targetType = targetType.withoutBounds();
ForgedMethod methodRef = prepareForgedMethod( sourceType, targetType, source, "{}" );
MapMappingMethod.Builder builder = new MapMappingMethod.Builder();
MapMappingMethod mapMappingMethod = builder
.mappingContext( ctx )
.method( methodRef )
.build();
return createForgedAssignment( source, methodRef, mapMappingMethod );
}
private Assignment forgeMapping(SourceRHS sourceRHS) {
Type sourceType;
if ( targetWriteAccessorType == AccessorType.ADDER ) {
sourceType = sourceRHS.getSourceTypeForMatching();
}
else {
sourceType = sourceRHS.getSourceType();
}
if ( forgedNamedBased && !canGenerateAutoSubMappingBetween( sourceType, targetType ) ) {
return null;
}
//Fail fast. If we could not find the method by now, no need to try
if ( sourceType.isPrimitive() || targetType.isPrimitive() ) {
return null;
}
String name = getName( sourceType, targetType );
name = Strings.getSafeVariableName( name, ctx.getReservedNames() );
List parameters = new ArrayList<>( method.getContextParameters() );
Type returnType;
// there's only one case for forging a method with mapping options: nested target properties.
// They should forge an update method only if we set the forceUpdateMethod. This is set to true,
// because we are forging a Mapping for a method with multiple source parameters.
// If the target type is enum, then we can't create an update method
if ( !targetType.isEnumType() && ( method.isUpdateMethod() || forceUpdateMethod )
&& targetWriteAccessorType != AccessorType.ADDER) {
parameters.add( Parameter.forForgedMappingTarget( targetType ) );
returnType = ctx.getTypeFactory().createVoidType();
}
else {
returnType = targetType;
}
ForgedMethod forgedMethod = forPropertyMapping( name,
sourceType,
returnType,
parameters,
method,
getForgedMethodHistory( sourceRHS ),
forgeMethodWithMappingReferences,
forgedNamedBased
);
return createForgedAssignment( sourceRHS, targetBuilderType, forgedMethod );
}
private ForgedMethodHistory getForgedMethodHistory(SourceRHS sourceRHS) {
return getForgedMethodHistory( sourceRHS, "" );
}
private ForgedMethodHistory getForgedMethodHistory(SourceRHS sourceRHS, String suffix) {
ForgedMethodHistory history = null;
if ( method instanceof ForgedMethod ) {
ForgedMethod method = (ForgedMethod) this.method;
history = method.getHistory();
}
return new ForgedMethodHistory( history, getSourceElementName() + suffix,
targetPropertyName + suffix, sourceRHS.getSourceType(), targetType, true, "property"
);
}
private String getName(Type sourceType, Type targetType) {
String fromName = getName( sourceType );
String toName = getName( targetType );
return Strings.decapitalize( fromName + "To" + toName );
}
private String getName(Type type) {
StringBuilder builder = new StringBuilder();
for ( Type typeParam : type.getTypeParameters() ) {
builder.append( typeParam.getIdentification() );
}
builder.append( type.getIdentification() );
return builder.toString();
}
private String getSourceElementName() {
Parameter sourceParam = sourceReference.getParameter();
List propertyEntries = sourceReference.getPropertyEntries();
if ( propertyEntries.isEmpty() ) {
return sourceParam.getName();
}
else if ( propertyEntries.size() == 1 ) {
PropertyEntry propertyEntry = propertyEntries.get( 0 );
return propertyEntry.getName();
}
else {
return Strings.join( sourceReference.getElementNames(), "." );
}
}
}
public static class ConstantMappingBuilder extends MappingBuilderBase {
private String constantExpression;
private FormattingParameters formattingParameters;
private MappingControl mappingControl;
private SelectionParameters selectionParameters;
ConstantMappingBuilder() {
super( ConstantMappingBuilder.class );
}
public ConstantMappingBuilder constantExpression(String constantExpression) {
this.constantExpression = constantExpression;
return this;
}
public ConstantMappingBuilder formattingParameters(FormattingParameters formattingParameters) {
this.formattingParameters = formattingParameters;
return this;
}
public ConstantMappingBuilder selectionParameters(SelectionParameters selectionParameters) {
this.selectionParameters = selectionParameters;
return this;
}
public ConstantMappingBuilder options(MappingOptions options) {
this.mappingControl = options.getMappingControl( ctx.getElementUtils() );
return this;
}
public PropertyMapping build() {
// source
String sourceErrorMessagePart = "constant '" + constantExpression + "'";
String errorMessageDetails = null;
Class baseForLiteral = null;
try {
baseForLiteral = NativeTypes.getLiteral( targetType.getFullyQualifiedName(), constantExpression );
}
catch ( IllegalArgumentException ex ) {
errorMessageDetails = ex.getMessage();
}
// the constant is not a primitive literal, assume it to be a String
if ( baseForLiteral == null ) {
constantExpression = "\"" + constantExpression + "\"";
baseForLiteral = String.class;
}
Type sourceType = ctx.getTypeFactory().getTypeForLiteral( baseForLiteral );
SelectionCriteria criteria = SelectionCriteria.forMappingMethods( selectionParameters,
mappingControl,
targetPropertyName,
method.getMappingTargetParameter() != null
);
Assignment assignment = null;
if ( !targetType.isEnumType() ) {
assignment = ctx.getMappingResolver().getTargetAssignment(
method,
targetType,
formattingParameters,
criteria,
new SourceRHS( constantExpression, sourceType, existingVariableNames, sourceErrorMessagePart ),
positionHint,
() -> null
);
}
else {
assignment = getEnumAssignment();
}
if ( assignment != null ) {
if ( targetWriteAccessor.getAccessorType() == AccessorType.SETTER ||
targetWriteAccessor.getAccessorType().isFieldAssignment() ) {
// target accessor is setter, so decorate assignment as setter
if ( assignment.isCallingUpdateMethod() ) {
if ( targetReadAccessor == null ) {
ctx.getMessager().printMessage(
method.getExecutable(),
positionHint,
Message.CONSTANTMAPPING_NO_READ_ACCESSOR_FOR_TARGET_TYPE,
targetPropertyName
);
}
Assignment factoryMethod =
ObjectFactoryMethodResolver.getFactoryMethod( method, targetType, null, ctx );
assignment = new UpdateWrapper(
assignment,
method.getThrownTypes(),
factoryMethod,
isFieldAssignment(),
targetType,
false,
false,
false );
}
else {
assignment = new SetterWrapper( assignment, method.getThrownTypes(), isFieldAssignment() );
}
}
else {
// target accessor is getter, so getter map/ collection handling
assignment = new GetterWrapperForCollectionsAndMaps( assignment,
method.getThrownTypes(),
targetType,
isFieldAssignment()
);
}
}
else if ( errorMessageDetails == null ) {
ctx.getMessager().printMessage(
method.getExecutable(),
positionHint,
Message.CONSTANTMAPPING_MAPPING_NOT_FOUND,
sourceType,
constantExpression,
targetType,
targetPropertyName
);
}
else {
ctx.getMessager().printMessage(
method.getExecutable(),
positionHint,
Message.CONSTANTMAPPING_MAPPING_NOT_FOUND_WITH_DETAILS,
sourceType,
constantExpression,
targetType,
targetPropertyName,
errorMessageDetails
);
}
return new PropertyMapping(
targetPropertyName,
targetWriteAccessor.getSimpleName(),
ValueProvider.of( targetReadAccessor ),
targetType,
assignment,
dependsOn,
null,
targetWriteAccessorType == AccessorType.PARAMETER
);
}
private Assignment getEnumAssignment() {
Assignment assignment = null;
// String String quotation marks.
String enumExpression = constantExpression.substring( 1, constantExpression.length() - 1 );
if ( targetType.getEnumConstants().contains( enumExpression ) ) {
String sourceErrorMessagePart = "constant '" + constantExpression + "'";
assignment = new SourceRHS( enumExpression, targetType, existingVariableNames, sourceErrorMessagePart );
assignment = new EnumConstantWrapper( assignment, targetType );
}
else {
ctx.getMessager().printMessage(
method.getExecutable(),
positionHint,
Message.CONSTANTMAPPING_NON_EXISTING_CONSTANT,
constantExpression,
targetType,
targetPropertyName
);
}
return assignment;
}
}
public static class JavaExpressionMappingBuilder extends MappingBuilderBase {
private String javaExpression;
JavaExpressionMappingBuilder() {
super( JavaExpressionMappingBuilder.class );
}
public JavaExpressionMappingBuilder javaExpression(String javaExpression) {
this.javaExpression = javaExpression;
return this;
}
public PropertyMapping build() {
Assignment assignment = new SourceRHS( javaExpression, null, existingVariableNames, "" );
if ( targetWriteAccessor.getAccessorType() == AccessorType.SETTER ||
targetWriteAccessor.getAccessorType().isFieldAssignment() ) {
// setter, so wrap in setter
assignment = new SetterWrapper( assignment, method.getThrownTypes(), isFieldAssignment() );
}
else {
// target accessor is getter, so wrap the setter in getter map/ collection handling
assignment = new GetterWrapperForCollectionsAndMaps( assignment,
method.getThrownTypes(),
targetType,
isFieldAssignment()
);
}
return new PropertyMapping(
targetPropertyName,
targetWriteAccessor.getSimpleName(),
ValueProvider.of( targetReadAccessor ),
targetType,
assignment,
dependsOn,
null,
targetWriteAccessorType == AccessorType.PARAMETER
);
}
}
// Constructor for creating mappings of constant expressions.
private PropertyMapping(String name, String targetWriteAccessorName,
ValueProvider targetReadAccessorProvider,
Type targetType, Assignment propertyAssignment,
Set dependsOn, Assignment defaultValueAssignment, boolean constructorMapping) {
this( name, null, targetWriteAccessorName, targetReadAccessorProvider,
targetType, propertyAssignment, dependsOn, defaultValueAssignment,
constructorMapping
);
}
private PropertyMapping(String name, String sourceBeanName, String targetWriteAccessorName,
ValueProvider targetReadAccessorProvider, Type targetType,
Assignment assignment,
Set dependsOn, Assignment defaultValueAssignment, boolean constructorMapping) {
this.name = name;
this.sourceBeanName = sourceBeanName;
this.targetWriteAccessorName = targetWriteAccessorName;
this.targetReadAccessorProvider = targetReadAccessorProvider;
this.targetType = targetType;
this.assignment = assignment;
this.dependsOn = dependsOn != null ? dependsOn : Collections.emptySet();
this.defaultValueAssignment = defaultValueAssignment;
this.constructorMapping = constructorMapping;
}
/**
* @return the name of this mapping (property name on the target side)
*/
public String getName() {
return name;
}
public String getSourceBeanName() {
return sourceBeanName;
}
public String getTargetWriteAccessorName() {
return targetWriteAccessorName;
}
public String getTargetReadAccessorName() {
return targetReadAccessorProvider == null ? null : targetReadAccessorProvider.getValue();
}
public Type getTargetType() {
return targetType;
}
public Assignment getAssignment() {
return assignment;
}
public Assignment getDefaultValueAssignment() {
return defaultValueAssignment;
}
public boolean isConstructorMapping() {
return constructorMapping;
}
@Override
public Set getImportTypes() {
if ( defaultValueAssignment == null ) {
return assignment.getImportTypes();
}
return org.mapstruct.ap.internal.util.Collections.asSet(
assignment.getImportTypes(),
defaultValueAssignment.getImportTypes()
);
}
public Set getDependsOn() {
return dependsOn;
}
@Override
public int hashCode() {
int hash = 5;
hash = 67 * hash + (this.name != null ? this.name.hashCode() : 0);
hash = 67 * hash + (this.targetType != null ? this.targetType.hashCode() : 0);
return hash;
}
@Override
public boolean equals(Object obj) {
if ( this == obj ) {
return true;
}
if ( obj == null ) {
return false;
}
if ( getClass() != obj.getClass() ) {
return false;
}
final PropertyMapping other = (PropertyMapping) obj;
if ( !Objects.equals( name, other.name ) ) {
return false;
}
if ( !Objects.equals( targetType, other.targetType ) ) {
return false;
}
return true;
}
@Override
public String toString() {
return "PropertyMapping {"
+ "\n name='" + name + "\',"
+ "\n targetWriteAccessorName='" + targetWriteAccessorName + "\',"
+ "\n targetReadAccessorName='" + getTargetReadAccessorName() + "\',"
+ "\n targetType=" + targetType + ","
+ "\n propertyAssignment=" + assignment + ","
+ "\n defaultValueAssignment=" + defaultValueAssignment + ","
+ "\n dependsOn=" + dependsOn
+ "\n}";
}
}