Examples of FieldDescriptorJDONature

org.exolab.castor.jdo.engine.nature.FieldDescriptorJDONature
JDO-specific nature for {@link FieldDescriptor}.

Augments {@link FieldDescriptor} to include persistence-specific data such as e.g. the column names, types and other SQL-related information.

To access persistence-specific data of a {@link FieldDescriptor}, use the following code fragment to ...
1. check for this nature
2. apply this nature to the {@link FieldDescriptor} in question.
3. access e.g. the column name.
Sample - Looking up column name
```
 FieldDescriptor fieldDescriptor = ...;                                                ... if (fieldDescriptor.hasNature(FieldDescriptorJDONature.class.getName()) {              1) FieldDescriptorJDONature nature = new FieldDescriptorJDONature(fieldDescriptor);    2) ... String columnName = nature.getColumnName;                                           3) } 
```
@author Werner Guttmann @since 1.2.1

Examples of org.exolab.castor.jdo.engine.nature.FieldDescriptorJDONature

        sqlTypes0 = new int[fields.length + 1];
        // the first field is the identity


        count = 1;
        jdoFields0[0] = _clsDesc.getIdentity().getFieldName();
        sqlTypes0[0] =  new FieldDescriptorJDONature(_clsDesc.getIdentity()).getSQLType()[0];
        for (int i = 0; i < fields.length; ++i) {
            if (fields[i].hasNature(FieldDescriptorJDONature.class.getName())) {
                jdoFields0[count] = new FieldDescriptorJDONature(fields[i]).getSQLName()[0];
                sqlTypes0[count] =  new FieldDescriptorJDONature(fields[i]).getSQLType()[0];
                ++count;
            }
        }
        jdoFields = new String[count];
        sqlTypes = new int[count];

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Examples of org.exolab.castor.jdo.engine.nature.FieldDescriptorJDONature

    }
    if (desc != null) {
        _fieldType = desc.getFieldType();
        try {
            _sqlType = SQLTypeInfos.sqlTypeNum2javaType(
                    new FieldDescriptorJDONature(desc).getSQLType()[0]);
        } catch (Exception ex) {
            throw new QueryException("Can't determine SQL class: " + ex);
        }
        _convertor = new FieldDescriptorJDONature(desc).getConvertor();
    }
  }

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Examples of org.exolab.castor.jdo.engine.nature.FieldDescriptorJDONature

            FieldDescriptor[] identityDescriptors = cdi.getIdentities();
            boolean isNull = true;
            
            for (int i = 0; i < identityDescriptors.length; i++) {
                Object temp;
                final FieldDescriptorJDONature jdoFieldNature = 
                    new FieldDescriptorJDONature(identityDescriptors[i]);
                
                if (jdoFieldNature.getSQLName().length == 1) {
                    temp = SQLTypeInfos.getValue(rs, columnIndex++, java.sql.Types.JAVA_OBJECT);
                } else {
                    Object[] temps = new Object[jdoFieldNature.getSQLName().length];
                    for (int j = 0; j < jdoFieldNature.getSQLName().length; j++) {
                        temps[j] = SQLTypeInfos.getValue(
                                rs, columnIndex++, java.sql.Types.JAVA_OBJECT);
                    }
                    temp = new Identity(temps);
                }
                
                if (LOG.isDebugEnabled()) {
                    LOG.debug("Obtained value " + temp + " for additional (extending) identity "
                            + potentialClassDescriptor.getJavaClass().getName() + "/"
                            + identityDescriptors[i].getFieldName() + " at position "
                            + columnIndex);
                }
                
                isNull = (temp == null);
                if (!isNull) {
                    numberOfIdentitiesToAnalyze += 1;
                    potentialClassDescriptorPrevious = potentialClassDescriptor;
                }
                
            }
            
            if (!iter.hasNext() && !isNull && numberOfIdentitiesToAnalyze > 0) {
                potentialLeafDescriptor = potentialClassDescriptor;
                suggestedNumberOfFields += potentialClassDescriptor.getFields().length;
            } else if (!iter.hasNext() && isNull && numberOfIdentitiesToAnalyze > 0) {
                potentialLeafDescriptor = potentialClassDescriptorPrevious; 
                // suggestedNumberOfFields += potentialClassDescriptor.getFields().length;
            } else {
                FieldDescriptor[] potentialFields = 
                    potentialClassDescriptor.getFields();
                for (int i = 0; i < potentialFields.length; i++) {
                    String[] columnNames = 
                        new FieldDescriptorJDONature(potentialFields[i]).getSQLName();
                    if (columnNames != null) {
                        columnIndex = columnIndex + columnNames.length;
                    }
                }

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Examples of org.exolab.castor.jdo.engine.nature.FieldDescriptorJDONature

    
    public static String[] getIdentitySQLNames(final ClassDescriptor desc) {
        FieldDescriptor[] identities = ((ClassDescriptorImpl) desc).getIdentities();
        String[] sqlNames = new String[identities.length];
        for (int i = 0; i < identities.length; i++) {
            sqlNames[i] = new FieldDescriptorJDONature(identities[i]).getSQLName()[0];
        }


        return sqlNames;
    }

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Examples of org.exolab.castor.jdo.engine.nature.FieldDescriptorJDONature

            FieldDescriptor leftField = oldDesc.getIdentity();
            FieldDescriptor rightField = tempDesc.getIdentity();
            
            _queryExpr.addInnerJoin(
                    new ClassDescriptorJDONature(oldDesc).getTableName(), 
                    new FieldDescriptorJDONature(leftField).getSQLName(),
                    new ClassDescriptorJDONature(tempDesc).getTableName(), 
                    new FieldDescriptorJDONature(rightField).getSQLName());


            oldDesc = tempDesc;
            tempDesc = tempDesc.getExtends();
        }
        _queryExpr.addSelect(getSQLExpr(selectPart));

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Examples of org.exolab.castor.jdo.engine.nature.FieldDescriptorJDONature

            }
            fieldDesc = (FieldDescriptor) fieldAndClass[0];
            sourceClass = (ClassDescriptor) fieldAndClass[1];


            ClassDescriptor clsDesc = fieldDesc.getClassDescriptor();
            FieldDescriptorJDONature fieldJDONature = new FieldDescriptorJDONature(fieldDesc);
            if (clsDesc != null) {
                //we must add this table as a join
                ClassDescriptorJDONature sourceClassJDONature = 
                    new ClassDescriptorJDONature(sourceClass);
                if (fieldJDONature.getManyKey() == null) {
                    //a many -> one relationship
                    FieldDescriptor foreignKey = clsDesc.getIdentity();
                    String sourceTableAlias = sourceClassJDONature.getTableName();
                    if (i > 1) {
                        sourceTableAlias = buildTableAlias(sourceTableAlias, path, i - 1);
                    }


                    ClassDescriptorJDONature clsDescNature;
                    clsDescNature = new ClassDescriptorJDONature(clsDesc);
                    _queryExpr.addInnerJoin(
                            sourceClassJDONature.getTableName(), 
                            new FieldDescriptorJDONature(fieldDesc).getSQLName(),
                            sourceTableAlias,
                            clsDescNature.getTableName(), 
                            new FieldDescriptorJDONature(foreignKey).getSQLName(),
                            buildTableAlias(clsDescNature.getTableName(), path, i));
                } else if (fieldJDONature.getManyTable() == null) {
                    //a one -> many relationship
                    FieldDescriptor identity = sourceClass.getIdentity();
                    String sourceTableAlias = sourceClassJDONature.getTableName();
                    if (i > 1) {
                        sourceTableAlias = buildTableAlias(sourceTableAlias, path, i - 1);
                    }


                    ClassDescriptorJDONature clsDescNature;
                    clsDescNature = new ClassDescriptorJDONature(clsDesc);
                    _queryExpr.addInnerJoin(
                            sourceClassJDONature.getTableName(), 
                            new FieldDescriptorJDONature(identity).getSQLName(),
                            sourceTableAlias,
                            clsDescNature.getTableName(), 
                            fieldJDONature.getManyKey(),
                            buildTableAlias(clsDescNature.getTableName(), path, i));
                } else {
                    //a many -> many relationship
                    FieldDescriptor identity = sourceClass.getIdentity();
                    FieldDescriptor foreignKey = clsDesc.getIdentity();
                    String manyTableAlias = fieldJDONature.getManyTable();
                    String sourceTableAlias = sourceClassJDONature.getTableName();
                    if (i > 1) {
                        manyTableAlias = buildTableAlias(manyTableAlias, path, i - 1);
                        sourceTableAlias = buildTableAlias(sourceTableAlias, path, i - 1);
                    }


                    _queryExpr.addInnerJoin(
                            sourceClassJDONature.getTableName(), 
                            new FieldDescriptorJDONature(identity).getSQLName(),
                            sourceTableAlias,
                            fieldJDONature.getManyTable(), 
                            fieldJDONature.getManyKey(),
                            manyTableAlias);


                    ClassDescriptorJDONature clsDescNature;
                    clsDescNature = new ClassDescriptorJDONature(clsDesc);
                    _queryExpr.addInnerJoin(
                            fieldJDONature.getManyTable(), 
                            new FieldDescriptorJDONature(fieldDesc).getSQLName(),
                            manyTableAlias,
                            clsDescNature.getTableName(), 
                            new FieldDescriptorJDONature(foreignKey).getSQLName(),
                            buildTableAlias(clsDescNature.getTableName(), path, i));
                }
                sourceClass = clsDesc;
            }
        }

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Examples of org.exolab.castor.jdo.engine.nature.FieldDescriptorJDONature

            } else {
              clsTableAlias = buildTableAlias(classDescriptorJDONature.getTableName(), path, 9999);
            }
            
            return _queryExpr.encodeColumn(clsTableAlias, 
                    new FieldDescriptorJDONature(field).getSQLName()[0]);
        case TokenType.DOLLAR:
            //parameters
            //return a question mark with the parameter number.
            //The calling function will do a mapping
            int child = exprTree.getChildCount() - 1;

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