Xtext не производит полный класс из моего dsl

Question

У меня есть грамматика xtext, которую я планирую использовать в приложении. Однако, когда я проверяю сгенерированные классы, некоторые элементы отсутствуют.

Вот грамматика:

grammar org.xtext.example.mydsl.MyDsl with org.eclipse.xtext.common.Terminals 

generate myDsl "http://www.xtext.org/example/mydsl/MyDsl" 

Model: 
    model += ModelBlock+ 
; 
ModelBlock: 
    SystemBlock | DataSetBlock | RelationshipBlock 
; 
SystemBlock: 
    'Systems' systemGroup=ID 
    systems+=System+ 
; 
DataSetBlock: 
    'DataSets' datasetGroup=ID 
    datasets+=DataSet+ 
    ; 
RelationshipBlock: 
    'Relationships' relationshipGroup=ID 
    relationships+=Relationship+ 
; 
System: 
    name = ID ':' 
     'name:' nm = STRING 
     ('description:' description = STRING)? 
; 
DataSet: 
    name = ID ':' 
     'name:' nm = STRING 
; 
Function: 
    name = ID ':' 
    'name:' nm = STRING 
; 
Relationship: 
    SystemCONNECTSSystem | 
    SystemCONSUMESDataSet | 
    SystemPRODUCESDataSet 
; 
SystemCONNECTSSystem: 
    rel=ID 
     ':' lhs = [System] 
     'CONNECTS' rhs = [System] 
; 
SystemCONSUMESDataSet: 
    rel=ID ':' lhs = [System] 'CONSUMES' rhs = [DataSet] 
    ('WITH' 'frequency:' frequency = INT)? 
;   
SystemPRODUCESDataSet: 
    rel=ID ':' lhs = [System] 'PRODUCES' rhs = [DataSet] 
    ('WITH' 'frequency:' frequency = INT 
     ('risk:' risk = RiskEnum)? 
    )? 
;   
enum RiskEnum: 
    h="high" | m="med" | l="low" 
; 

Вы заметите, что классы SystemCONNECTSSystem, SystemPRODUCESDataSet и SystemCONSUMESDataSet не генерируя LHS атрибутов, но генерируют ОРЗ атрибутов. См. SystemPRODCUESDataSet ниже, остальные проблемы имеют такую ​​же проблему.

/** 
*/ 
package org.xtext.example.mydsl.myDsl; 


/** 
* <!-- begin-user-doc --> 
* A representation of the model object '<em><b>System PRODUCES Data Set</b></em>'. 
* <!-- end-user-doc --> 
* 
* <p> 
* The following features are supported: 
* </p> 
* <ul> 
* <li>{@link org.xtext.example.mydsl.myDsl.SystemPRODUCESDataSet#getRhs <em>Rhs</em>}</li> 
* <li>{@link org.xtext.example.mydsl.myDsl.SystemPRODUCESDataSet#getFrequency <em>Frequency</em>}</li> 
* <li>{@link org.xtext.example.mydsl.myDsl.SystemPRODUCESDataSet#getRisk <em>Risk</em>}</li> 
* </ul> 
* 
* @see org.xtext.example.mydsl.myDsl.MyDslPackage#getSystemPRODUCESDataSet() 
* @model 
* @generated 
*/ 
public interface SystemPRODUCESDataSet extends Relationship 
{ 
    /** 
    * Returns the value of the '<em><b>Rhs</b></em>' reference. 
    * <!-- begin-user-doc --> 
    * <p> 
    * If the meaning of the '<em>Rhs</em>' reference isn't clear, 
    * there really should be more of a description here... 
    * </p> 
    * <!-- end-user-doc --> 
    * @return the value of the '<em>Rhs</em>' reference. 
    * @see #setRhs(DataSet) 
    * @see org.xtext.example.mydsl.myDsl.MyDslPackage#getSystemPRODUCESDataSet_Rhs() 
    * @model 
    * @generated 
    */ 
    DataSet getRhs(); 

    /** 
    * Sets the value of the '{@link org.xtext.example.mydsl.myDsl.SystemPRODUCESDataSet#getRhs <em>Rhs</em>}' reference. 
    * <!-- begin-user-doc --> 
    * <!-- end-user-doc --> 
    * @param value the new value of the '<em>Rhs</em>' reference. 
    * @see #getRhs() 
    * @generated 
    */ 
    void setRhs(DataSet value); 

    /** 
    * Returns the value of the '<em><b>Frequency</b></em>' attribute. 
    * <!-- begin-user-doc --> 
    * <p> 
    * If the meaning of the '<em>Frequency</em>' attribute isn't clear, 
    * there really should be more of a description here... 
    * </p> 
    * <!-- end-user-doc --> 
    * @return the value of the '<em>Frequency</em>' attribute. 
    * @see #setFrequency(int) 
    * @see org.xtext.example.mydsl.myDsl.MyDslPackage#getSystemPRODUCESDataSet_Frequency() 
    * @model 
    * @generated 
    */ 
    int getFrequency(); 

    /** 
    * Sets the value of the '{@link org.xtext.example.mydsl.myDsl.SystemPRODUCESDataSet#getFrequency <em>Frequency</em>}' attribute. 
    * <!-- begin-user-doc --> 
    * <!-- end-user-doc --> 
    * @param value the new value of the '<em>Frequency</em>' attribute. 
    * @see #getFrequency() 
    * @generated 
    */ 
    void setFrequency(int value); 

    /** 
    * Returns the value of the '<em><b>Risk</b></em>' attribute. 
    * The literals are from the enumeration {@link org.xtext.example.mydsl.myDsl.RiskEnum}. 
    * <!-- begin-user-doc --> 
    * <p> 
    * If the meaning of the '<em>Risk</em>' attribute isn't clear, 
    * there really should be more of a description here... 
    * </p> 
    * <!-- end-user-doc --> 
    * @return the value of the '<em>Risk</em>' attribute. 
    * @see org.xtext.example.mydsl.myDsl.RiskEnum 
    * @see #setRisk(RiskEnum) 
    * @see org.xtext.example.mydsl.myDsl.MyDslPackage#getSystemPRODUCESDataSet_Risk() 
    * @model 
    * @generated 
    */ 
    RiskEnum getRisk(); 

    /** 
    * Sets the value of the '{@link org.xtext.example.mydsl.myDsl.SystemPRODUCESDataSet#getRisk <em>Risk</em>}' attribute. 
    * <!-- begin-user-doc --> 
    * <!-- end-user-doc --> 
    * @param value the new value of the '<em>Risk</em>' attribute. 
    * @see org.xtext.example.mydsl.myDsl.RiskEnum 
    * @see #getRisk() 
    * @generated 
    */ 
    void setRisk(RiskEnum value); 

} // SystemPRODUCESDataSet 

Может ли кто-нибудь проливать свет на то, что здесь происходит?

Answer 1

Атрибут LHS доступен для супер-типа SystemPRODUCESDataSet и для друзей. Relationship должен выставить для него геттер. Это потому, что все подтипы Relationship имеют LHS в общем, поэтому он автоматически втягивается в супер-тип.