本文整理了Java中org.eclipse.persistence.internal.expressions.QueryKeyExpression.getBaseExpression方法的一些代码示例，展示了QueryKeyExpression.getBaseExpression的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。QueryKeyExpression.getBaseExpression方法的具体详情如下：
包路径：org.eclipse.persistence.internal.expressions.QueryKeyExpression
类名称：QueryKeyExpression
方法名：getBaseExpression

QueryKeyExpression.getBaseExpression介绍

暂无

代码示例

代码示例来源：origin: org.eclipse.persistence/com.springsource.org.eclipse.persistence

/**
 * INTERNAL:
 * Return the descriptor which contains this query key.
 */
public ClassDescriptor getContainingDescriptor() {
  return ((DataExpression)getBaseExpression()).getDescriptor();
}

代码示例来源：origin: org.eclipse.persistence/org.eclipse.persistence.core

/**
* Iterate through a list of expressions searching for the given attribute name.
* Return true if it is found, false otherwise.
*/
protected boolean isAttributeNameInJoinedExpressionList(String attributeName, List joinedExpressionList) {
  for (Iterator joinEnum = joinedExpressionList.iterator(); joinEnum.hasNext();) {
    QueryKeyExpression expression = (QueryKeyExpression)joinEnum.next();
    while (!expression.getBaseExpression().isExpressionBuilder()) {
      expression = (QueryKeyExpression)expression.getBaseExpression();
    }
    if (expression.getName().equals(attributeName)) {
      return true;
    }
  }
  return false;
}

代码示例来源：origin: org.eclipse.persistence/com.springsource.org.eclipse.persistence

/**
 * Iterate through a list of expressions searching for the given attribute name.
 * Return true if it is found, false otherwise.
 */
protected boolean isAttributeNameInJoinedExpressionList(String attributeName, List joinedExpressionList) {
  for (Iterator joinEnum = joinedExpressionList.iterator(); joinEnum.hasNext();) {
    QueryKeyExpression expression = (QueryKeyExpression)joinEnum.next();
    while (!expression.getBaseExpression().isExpressionBuilder()) {
      expression = (QueryKeyExpression)expression.getBaseExpression();
    }
    if (expression.getName().equals(attributeName)) {
      return true;
    }
  }
  return false;
}

代码示例来源：origin: com.haulmont.thirdparty/eclipselink

/**
* Iterate through a list of expressions searching for the given attribute name.
* Return true if it is found, false otherwise.
*/
protected boolean isAttributeNameInJoinedExpressionList(String attributeName, List joinedExpressionList) {
  for (Iterator joinEnum = joinedExpressionList.iterator(); joinEnum.hasNext();) {
    QueryKeyExpression expression = (QueryKeyExpression)joinEnum.next();
    while (!expression.getBaseExpression().isExpressionBuilder()) {
      expression = (QueryKeyExpression)expression.getBaseExpression();
    }
    if (expression.getName().equals(attributeName)) {
      return true;
    }
  }
  return false;
}

代码示例来源：origin: com.haulmont.thirdparty/eclipselink

/**
 * INTERNAL:
 * Order by foreign key fields if a foreign key mapping (avoids joins).
 */
@Override
public List<Expression> getOrderByNormalizedExpressions(Expression base) {
  if (this.foreignKeyFields.size() > 0) {
    List<Expression> orderBys = new ArrayList(this.foreignKeyFields.size());
    for (DatabaseField field : this.foreignKeyFields) {
      orderBys.add(((QueryKeyExpression)base).getBaseExpression().getField(field));
    }
    return orderBys;
  }
  return super.getOrderByNormalizedExpressions(base);
}

代码示例来源：origin: org.eclipse.persistence/org.eclipse.persistence.core

/**
   * INTERNAL:
   * Order by foreign key fields if a foreign key mapping (avoids joins).
   */
  @Override
  public List<Expression> getOrderByNormalizedExpressions(Expression base) {
    if (this.foreignKeyFields.size() > 0) {
      List<Expression> orderBys = new ArrayList(this.foreignKeyFields.size());
      for (DatabaseField field : this.foreignKeyFields) {
        orderBys.add(((QueryKeyExpression)base).getBaseExpression().getField(field));
      }
      return orderBys;
    }
    return super.getOrderByNormalizedExpressions(base);
  }
}

代码示例来源：origin: org.eclipse.persistence/org.eclipse.persistence.core

/**
 * INTERNAL:
 * Return if partial attribute.
 */
public boolean isPartialAttribute(String attributeName) {
  if (this.partialAttributeExpressions == null) {
    return false;
  }
  List<Expression> partialAttributeExpressions = getPartialAttributeExpressions();
  int size = partialAttributeExpressions.size();
  for (int index = 0; index < size; index++) {
    QueryKeyExpression expression = (QueryKeyExpression)partialAttributeExpressions.get(index);
    while (!expression.getBaseExpression().isExpressionBuilder()) {
      expression = (QueryKeyExpression)expression.getBaseExpression();
    }
    if (expression.getName().equals(attributeName)) {
      return true;
    }
  }
  return false;
}

代码示例来源：origin: org.eclipse.persistence/com.springsource.org.eclipse.persistence

/**
 * INTERNAL:
 * Returns the join criteria stored in the mapping selection query. This criteria
 * is used to read reference objects across the tables from the database.
 */
public Expression getJoinCriteria(QueryKeyExpression exp) {
  Expression selectionCriteria = getSelectionCriteria();
  return exp.getBaseExpression().twist(selectionCriteria, exp);
}

代码示例来源：origin: org.eclipse.persistence/com.springsource.org.eclipse.persistence

/**
 * INTERNAL:
 * Return if partial attribute.
 */
public boolean isPartialAttribute(String attributeName) {
  if (!hasPartialAttributeExpressions()) {
    return false;
  }
  List<Expression> partialAttributeExpressions = getPartialAttributeExpressions();
  int size = partialAttributeExpressions.size();
  for (int index = 0; index < size; index++) {
    QueryKeyExpression expression = (QueryKeyExpression)partialAttributeExpressions.get(index);
    while (!expression.getBaseExpression().isExpressionBuilder()) {
      expression = (QueryKeyExpression)expression.getBaseExpression();
    }
    if (expression.getName().equals(attributeName)) {
      return true;
    }
  }
  return false;
}

代码示例来源：origin: com.haulmont.thirdparty/eclipselink

/**
 * INTERNAL:
 * If there is root expression in the list then indicates whether it shouldUseOuterJoin,
 * otherwise return false.
 */
protected boolean hasRootExpressionThatShouldUseOuterJoin(List expressions) {
  for (Iterator expressionsEnum = expressions.iterator();
       expressionsEnum.hasNext();) {
    Expression next = (Expression)expressionsEnum.next();
    // The expressionBuilder can be one of the locked expressions in
    // the ForUpdateOfClause.
    if (!next.isQueryKeyExpression()) {
      continue;
    }
    QueryKeyExpression expression = (QueryKeyExpression)next;
    if (expression.getBaseExpression().isExpressionBuilder() && expression.getName().equals(getAttributeName())) {
      return expression.shouldUseOuterJoin();
    }
  }
  return false;
}

代码示例来源：origin: org.eclipse.persistence/org.eclipse.persistence.core

/**
 * INTERNAL:
 * If there is root expression in the list then indicates whether it shouldUseOuterJoin,
 * otherwise return false.
 */
protected boolean hasRootExpressionThatShouldUseOuterJoin(List expressions) {
  for (Iterator expressionsEnum = expressions.iterator();
       expressionsEnum.hasNext();) {
    Expression next = (Expression)expressionsEnum.next();
    // The expressionBuilder can be one of the locked expressions in
    // the ForUpdateOfClause.
    if (!next.isQueryKeyExpression()) {
      continue;
    }
    QueryKeyExpression expression = (QueryKeyExpression)next;
    if (expression.getBaseExpression().isExpressionBuilder() && expression.getName().equals(getAttributeName())) {
      return expression.shouldUseOuterJoin();
    }
  }
  return false;
}

代码示例来源：origin: org.eclipse.persistence/com.springsource.org.eclipse.persistence

/**
 * INTERNAL:
 * Returns the join criteria stored in the mapping selection query. This criteria
 * is used to read reference objects across the tables from the database.
 */
public Expression getJoinCriteria(QueryKeyExpression exp) {
  Expression selectionCriteria = getSelectionCriteria();
  Expression keySelectionCriteria = containerPolicy.getKeySelectionCriteria();
  if (keySelectionCriteria != null){
    selectionCriteria = selectionCriteria.and(keySelectionCriteria);
  }
  return exp.getBaseExpression().twist(selectionCriteria, exp);
}

代码示例来源：origin: org.eclipse.persistence/com.springsource.org.eclipse.persistence

/**
 * Return the alias for our table
 */
protected DatabaseTable getAliasedTable() {
  DataExpression base = (DataExpression)getBaseExpression();
  DatabaseTable alias = base.aliasForTable(getField().getTable());
  if (alias == null) {
    return getField().getTable();
  } else {
    return alias;
  }
}

代码示例来源：origin: org.eclipse.persistence/com.springsource.org.eclipse.persistence

/**
 * INTERNAL:
 * Join criteria is created to read target records (nested table) from the table.
 */
public Expression getJoinCriteria(QueryKeyExpression exp) {
  ExpressionBuilder builder = new ExpressionBuilder();
  Expression selectionCriteria = builder.ref().equal(builder.value());
  return exp.getBaseExpression().twist(selectionCriteria, exp);
}

代码示例来源：origin: com.haulmont.thirdparty/eclipselink

/**
 * INTERNAL:
 * Lookup the query key for this item.
 * If an aggregate of foreign mapping is found it is traversed.
 */
protected QueryKey getLeafQueryKeyFor(DatabaseQuery query, Expression expression, ClassDescriptor rootDescriptor, AbstractSession session) throws QueryException {
  // Check for database field expressions or place holder
  if ((expression == null) || (expression.isFieldExpression())) {
    return null;
  }
  if (!(expression.isQueryKeyExpression())) {
    return null;
  }
  
  QueryKeyExpression qkExpression = (QueryKeyExpression)expression;
  Expression baseExpression = qkExpression.getBaseExpression();
  ClassDescriptor descriptor = baseExpression.getLeafDescriptor(query, rootDescriptor, session);
  return descriptor.getQueryKeyNamed(qkExpression.getName());
}

代码示例来源：origin: org.eclipse.persistence/com.springsource.org.eclipse.persistence

/**
 * INTERNAL:
 * Rebuild myself against the base, with the values of parameters supplied by the context
 * expression. This is used for transforming a standalone expression (e.g. the join criteria of a mapping)
 * into part of some larger expression. You normally would not call this directly, instead calling twist
 * See the comment there for more details"
 */
public Expression twistedForBaseAndContext(Expression newBase, Expression context) {
  Expression twistedBase = getBaseExpression().twistedForBaseAndContext(newBase, context);
  QueryKeyExpression result = (QueryKeyExpression)twistedBase.get(getName());
  if (shouldUseOuterJoin) {
    result.doUseOuterJoin();
  }
  if (shouldQueryToManyRelationship) {
    result.doQueryToManyRelationship();
  }
  return result;
}

代码示例来源：origin: org.eclipse.persistence/org.eclipse.persistence.core

/**
 * INTERNAL:
 * Lookup the query key for this item.
 * If an aggregate of foreign mapping is found it is traversed.
 */
protected QueryKey getLeafQueryKeyFor(DatabaseQuery query, Expression expression, ClassDescriptor rootDescriptor, AbstractSession session) throws QueryException {
  // Check for database field expressions or place holder
  if ((expression == null) || (expression.isFieldExpression())) {
    return null;
  }
  if (!(expression.isQueryKeyExpression())) {
    return null;
  }
  QueryKeyExpression qkExpression = (QueryKeyExpression)expression;
  Expression baseExpression = qkExpression.getBaseExpression();
  ClassDescriptor descriptor = baseExpression.getLeafDescriptor(query, rootDescriptor, session);
  return descriptor.getQueryKeyNamed(qkExpression.getName());
}

代码示例来源：origin: org.eclipse.persistence/com.springsource.org.eclipse.persistence

/**
 * Calculate the source table for based on the various QueryKeyExpression
 * usages (join query keys, custom defined query keys, or query keys for
 * mappings).
 * 
 * Called from {@link SQLSelectStatement#appendFromClauseForOuterJoin}.
 * 
 * @return DatabaseTable
 */    
public DatabaseTable getSourceTable() {
  if(getMapping() != null) {
    // Grab the source table from the mapping not just the first table 
    // from the descriptor. In an joined inheritance hierarchy, the
    // fk used in the outer join may be from a subclasses's table.
    if (getMapping().isObjectReferenceMapping() && ((ObjectReferenceMapping) getMapping()).isForeignKeyRelationship()) {
       return getMapping().getFields().firstElement().getTable();
    } else {
      return ((ObjectExpression)getBaseExpression()).getDescriptor().getTables().firstElement();    
    }
  } else {
    return ((ForeignReferenceQueryKey)getQueryKeyOrNull()).getSourceTable();
  }
}

代码示例来源：origin: org.eclipse.persistence/com.springsource.org.eclipse.persistence

/**
 * INTERNAL:
 * This expression is built on a different base than the one we want. Rebuild it and
 * return the root of the new tree
 */
public Expression rebuildOn(Expression newBase) {
  Expression newLocalBase = getBaseExpression().rebuildOn(newBase);
  QueryKeyExpression result = null;
  // For bug 3096634 rebuild outer joins correctly from the start.
  if (shouldUseOuterJoin) {
    result = (QueryKeyExpression)newLocalBase.getAllowingNull(getName());
  } else {
    result = (QueryKeyExpression)newLocalBase.get(getName());
  }
  if (shouldQueryToManyRelationship) {
    result.doQueryToManyRelationship();
  }
  result.setSelectIfOrderedBy(selectIfOrderedBy());
  return result;
}

代码示例来源：origin: org.eclipse.persistence/com.springsource.org.eclipse.persistence

/**
 * INTERNAL:
 * Print java for project class generation
 */
public void printJava(ExpressionJavaPrinter printer) {
  getBaseExpression().printJava(printer);
  if (!shouldUseOuterJoin()) {
    if (!shouldQueryToManyRelationship()) {
      printer.printString(".get(");
    } else {
      printer.printString(".anyOf(");
    }
  } else {
    if (!shouldQueryToManyRelationship()) {
      printer.printString(".getAllowingNull(");
    } else {
      printer.printString(".anyOfAllowingNone(");
    }
  }
  printer.printString("\"" + getName() + "\")");
}