Examples of org.apache.jdo.model.java.JavaType

org.apache.jdo.model.java.JavaType
A JavaType instance represents a type as defined in the Java language. The interface defines interrogative methods to check whether a type is primitive, an interface or array, is a JDO supported collection or map, is a value or trackable class, is a persistence capable class, etc. Furthermore it defines methods to get detailed information about the type such as name, modifiers, superclass and the JDO meta data if this type represent a persistence capable class.
Different environments (runtime, enhancer, development) will have different JavaType implementations to provide answers to the various methods. @author Michael Bouschen @since JDO 1.0.1

     * Get the type representation of the array component type. 
     * @return the array component type
     */
    public JavaType getElementType() {
        JDOField jdoField = getDeclaringField();
        JavaType fieldType = jdoField.getType();
        return (fieldType != null) ? fieldType.getArrayComponentType() : null;
    }

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            return persistenceModifier;
        }
        
        // not set => calculate
        int result = PersistenceModifier.UNSPECIFIED;
        JavaType type = getType();
        if (nameHasJDOPrefix()) {
            result = PersistenceModifier.NONE;
        }
        else if (type != null) {
            result = TypeSupport.isPersistenceFieldType(type) ?

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        boolean dfg = false;
        if (isPrimaryKey()) {
            dfg = false;
        }
        else {
            JavaType type = getType();
            if ((type != null) && type.isValue()) {
                dfg = true;
            }
        }
        
        return dfg;

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            return embedded.booleanValue();
        }
        
        // not set => calculate
        boolean result = false;
        JavaType type = getType();
        if (type != null) {
            result = TypeSupport.isEmbeddedFieldType(type);
        }
        return result;
    }

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            // return java field, if explicitly set by the setter
            return javaField;
        }
        
        // not set => calculate
        JavaType javaType = getDeclaringClass().getJavaType();
        return javaType.getJavaField(getName());
    }

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            // field has persistence modifier none => cannot be a relationship
            return null;
                            
        // check the type if available
        JDORelationship rel = null;
        JavaType type = getType();
        if (type != null) {
            if (type.isValue() || TypeSupport.isValueArrayType(type)) {
                // no relationship
                rel = null;
            }
            else if (type.isJDOSupportedCollection()) {
                rel = createJDOCollectionInternal();
            }
            else if (type.isJDOSupportedMap()) {
                rel = createJDOMapInternal();
            }
            else if (type.isArray()) {
                rel = createJDOArrayInternal();
            }
            else {
                rel = createJDOReferenceInternal();
            }

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            // return javaProperty, if explicitly set by the setter
            return javaProperty;
        }
        
        // not set => calculate
        JavaType javaType = getDeclaringClass().getJavaType();
        return javaType.getJavaProperty(getName());
    }

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            // return objectIdClass if explicitly set by the setter
            return objectIdClass;
        }


        // not set => try to resolve ObjectId class 
        JavaType type = null;
        String name = getDeclaredObjectIdClassName();
        if (name != null) {
            JavaModel javaModel = getDeclaringModel().getJavaModel();
            type = javaModel.getJavaType(name);
            if (Modifier.isAbstract(type.getModifiers()))
                // do not return ObjectId class if abstract
                type = null;
        }
        else {
            JDOClass superclass = getPersistenceCapableSuperclass();

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        if (declaredObjectIdClassName != null) {
            // ObjectId is declared, but it might not be qualified
            int index = declaredObjectIdClassName.indexOf('.');
            if (index == -1) {
                // not qualified => try to resolve it
                JavaType type = TypeSupport.resolveType(getDeclaringModel(), 
                    declaredObjectIdClassName, getPackagePrefix());
                if (type == null) {
                    throw new ModelFatalException(
                        msg.msg("EXC_CannotResolveObjectIdClass", //NOI18N
                                declaredObjectIdClassName, getName()));
                }
                this.declaredObjectIdClassName = type.getName();
            }
        }
        else {
            // not declared, check for single field ObjectId class
            JDOField[] declaredPKFields = getDeclaredPrimaryKeyFields();
            if ((declaredPKFields != null) && (declaredPKFields.length == 1)) {
                // there is one pk field declared by this class => 
                // check the type
                JavaType fieldType = declaredPKFields[0].getType();
                if (fieldType != null) {
                    return TypeSupport.getSingleFieldObjectIdClassName(
                        fieldType.getName());
                }
            }
        }
        return declaredObjectIdClassName;
    }

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        if (pcSuperclassName != null) {
            // pcSuperclassName is declared, but it might not be qualified
            int index = pcSuperclassName.indexOf('.');
            if (index == -1) {
                // not qualified => try to resolve it
                JavaType type = TypeSupport.resolveType(getDeclaringModel(),
                    pcSuperclassName, getPackagePrefix());
                if (type == null) {
                    throw new ModelFatalException(
                        msg.msg("EXC_CannotResolvePCSuperClass", //NOI18N
                                pcSuperclassName, getName()));
                }
                this.pcSuperclassName = type.getName();
            }
        }
        return pcSuperclassName;
    }

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