com.yahoo.squidb.sql.Query.isEmpty()方法的使用及代码示例

x33g5p2x  于2022-01-29 转载在 其他  
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本文整理了Java中com.yahoo.squidb.sql.Query.isEmpty方法的一些代码示例，展示了Query.isEmpty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。Query.isEmpty方法的具体详情如下：
包路径：com.yahoo.squidb.sql.Query
类名称：Query
方法名：isEmpty

Query.isEmpty介绍

暂无

代码示例

代码示例来源：origin: yahoo/squidb

  1. private Query(List<Field<?>> fields) {
  2.   if (!isEmpty(fields)) {
  3.     this.fields = new ArrayList<>(fields);
  4.   }
  5. }

代码示例来源：origin: yahoo/squidb

  1. private <T> ArrayList<T> forkList(ArrayList<T> list) {
  2.   if (isEmpty(list)) {
  3.     return null;
  4.   }
  5.   return new ArrayList<>(list);
  6. }

代码示例来源：origin: yahoo/squidb

  1. private void visitJoinClause(SqlBuilder builder, boolean forSqlValidation) {
  2.   if (isEmpty(joins)) {
  3.     return;
  4.   }
  5.   builder.sql.append(" ");
  6.   builder.appendConcatenatedCompilables(joins, " ", forSqlValidation);
  7. }

代码示例来源：origin: yahoo/squidb

  1. private void visitWhereClause(SqlBuilder builder, boolean forSqlValidation) {
  2.   if (isEmpty(criterions)) {
  3.     return;
  4.   }
  5.   builder.sql.append(" WHERE ");
  6.   if (forSqlValidation) {
  7.     builder.sql.append("(");
  8.   }
  9.   builder.appendConcatenatedCompilables(criterions, " AND ", forSqlValidation);
  10.   if (forSqlValidation) {
  11.     builder.sql.append(")");
  12.   }
  13. }

代码示例来源：origin: yahoo/squidb

  1. private void visitCompoundSelectClauses(SqlBuilder builder, boolean forSqlValidation) {
  2.   if (isEmpty(compoundSelects)) {
  3.     return;
  4.   }
  5.   builder.sql.append(" ");
  6.   builder.appendConcatenatedCompilables(compoundSelects, " ", forSqlValidation);
  7. }

代码示例来源：origin: yahoo/squidb

  1. private Query(Field<?>... fields) {
  2.   if (!isEmpty(fields)) {
  3.     this.fields = new ArrayList<>();
  4.     SquidUtilities.addAll(this.fields, fields);
  5.   }
  6. }

代码示例来源：origin: yahoo/squidb

  1. private void visitOrderByClause(SqlBuilder builder, boolean forSqlValidation) {
  2.   if (isEmpty(orders)) {
  3.     return;
  4.   }
  5.   builder.sql.append(" ORDER BY ");
  6.   builder.appendConcatenatedCompilables(orders, ", ", forSqlValidation);
  7. }

代码示例来源：origin: yahoo/squidb

  1. private void visitGroupByClause(SqlBuilder builder, boolean forSqlValidation) {
  2.   if (isEmpty(groupByFields)) {
  3.     return;
  4.   }
  5.   builder.sql.append(" GROUP BY");
  6.   for (Field<?> groupBy : groupByFields) {
  7.     builder.sql.append(" ");
  8.     groupBy.appendQualifiedExpression(builder, forSqlValidation);
  9.     builder.sql.append(",");
  10.   }
  11.   builder.sql.deleteCharAt(builder.sql.length() - 1);
  12.   if (isEmpty(havings)) {
  13.     return;
  14.   }
  15.   builder.sql.append(" HAVING ");
  16.   builder.appendConcatenatedCompilables(havings, " AND ", forSqlValidation);
  17. }

代码示例来源：origin: yahoo/squidb

  1. private void visitSelectClause(SqlBuilder builder, boolean forSqlValidation) {
  2.   builder.sql.append("SELECT ");
  3.   if (distinct) {
  4.     builder.sql.append("DISTINCT ");
  5.   }
  6.   List<Field<?>> toSelect;
  7.   if (isEmpty(fields)) {
  8.     // SELECT * may yield unexpected column names, so we get the full list of fields to specify explicit aliases
  9.     toSelect = getFields();
  10.   } else {
  11.     toSelect = fields;
  12.   }
  13.   builder.appendConcatenatedCompilables(toSelect, ", ", forSqlValidation);
  14. }

代码示例来源：origin: yahoo/squidb

  1. /**
  2.  * @return the {@link Field Fields} this query selects
  3.  */
  4. public List<Field<?>> getFields() {
  5.   if (isEmpty(selectAllCache)) {
  6.     if (selectAllCache == null) {
  7.       selectAllCache = new ArrayList<>();
  8.     }
  9.     if (!isEmpty(fields)) {
  10.       selectAllCache.addAll(fields);
  11.     } else {
  12.       SquidUtilities.addAll(selectAllCache, table.allFields());
  13.       if (joins != null) {
  14.         for (Join join : joins) {
  15.           SquidUtilities.addAll(selectAllCache, join.joinTable.allFields());
  16.         }
  17.       }
  18.     }
  19.   }
  20.   return new ArrayList<>(selectAllCache);
  21. }

代码示例来源：origin: yahoo/squidb

  1. /**
  2.  * Add more {@link Field Fields} to be selected
  3.  *
  4.  * @param fields the additional Fields to be selected
  5.  * @return this Query object, to allow chaining method calls
  6.  */
  7. public Query selectMore(List<Field<?>> fields) {
  8.   if (immutable) {
  9.     return fork().selectMore(fields);
  10.   }
  11.   if (!isEmpty(fields)) {
  12.     if (this.fields == null) {
  13.       this.fields = new ArrayList<>(fields);
  14.     } else {
  15.       this.fields.addAll(fields);
  16.     }
  17.     if (selectAllCache != null) {
  18.       selectAllCache.clear();
  19.     }
  20.     invalidateCompileCache();
  21.   }
  22.   return this;
  23. }

代码示例来源：origin: yahoo/squidb

  1. /**
  2.  * Add more {@link Field Fields} to be selected
  3.  *
  4.  * @param fields the additional Fields to be selected
  5.  * @return this Query object, to allow chaining method calls
  6.  */
  7. public Query selectMore(Field<?>... fields) {
  8.   if (immutable) {
  9.     return fork().selectMore(fields);
  10.   }
  11.   if (!isEmpty(fields)) {
  12.     if (this.fields == null) {
  13.       this.fields = new ArrayList<>();
  14.     }
  15.     SquidUtilities.addAll(this.fields, fields);
  16.     if (selectAllCache != null) {
  17.       selectAllCache.clear();
  18.     }
  19.     invalidateCompileCache();
  20.   }
  21.   return this;
  22. }

代码示例来源：origin: com.yahoo.squidb/squidb

  1. private Query(List<Field<?>> fields) {
  2.   if (!isEmpty(fields)) {
  3.     this.fields = new ArrayList<>(fields);
  4.   }
  5. }

代码示例来源：origin: com.yahoo.squidb/squidb

  1. private <T> ArrayList<T> forkList(ArrayList<T> list) {
  2.   if (isEmpty(list)) {
  3.     return null;
  4.   }
  5.   return new ArrayList<>(list);
  6. }

代码示例来源：origin: com.yahoo.squidb/squidb

  1. private void visitJoinClause(SqlBuilder builder, boolean forSqlValidation) {
  2.   if (isEmpty(joins)) {
  3.     return;
  4.   }
  5.   builder.sql.append(" ");
  6.   builder.appendConcatenatedCompilables(joins, " ", forSqlValidation);
  7. }

代码示例来源：origin: com.yahoo.squidb/squidb

  1. private void visitCompoundSelectClauses(SqlBuilder builder, boolean forSqlValidation) {
  2.   if (isEmpty(compoundSelects)) {
  3.     return;
  4.   }
  5.   builder.sql.append(" ");
  6.   builder.appendConcatenatedCompilables(compoundSelects, " ", forSqlValidation);
  7. }

代码示例来源：origin: com.yahoo.squidb/squidb

  1. private Query(Field<?>... fields) {
  2.   if (!isEmpty(fields)) {
  3.     this.fields = new ArrayList<>();
  4.     SquidUtilities.addAll(this.fields, fields);
  5.   }
  6. }

代码示例来源：origin: com.yahoo.squidb/squidb

  1. private void visitOrderByClause(SqlBuilder builder, boolean forSqlValidation) {
  2.   if (isEmpty(orders)) {
  3.     return;
  4.   }
  5.   builder.sql.append(" ORDER BY ");
  6.   builder.appendConcatenatedCompilables(orders, ", ", forSqlValidation);
  7. }

代码示例来源：origin: com.yahoo.squidb/squidb

  1. private void visitWhereClause(SqlBuilder builder, boolean forSqlValidation) {
  2.   if (isEmpty(criterions)) {
  3.     return;
  4.   }
  5.   builder.sql.append(" WHERE ");
  6.   if (forSqlValidation) {
  7.     builder.sql.append("(");
  8.   }
  9.   builder.appendConcatenatedCompilables(criterions, " AND ", forSqlValidation);
  10.   if (forSqlValidation) {
  11.     builder.sql.append(")");
  12.   }
  13. }

代码示例来源：origin: com.yahoo.squidb/squidb

  1. private void visitSelectClause(SqlBuilder builder, boolean forSqlValidation) {
  2.   builder.sql.append("SELECT ");
  3.   if (distinct) {
  4.     builder.sql.append("DISTINCT ");
  5.   }
  6.   List<Field<?>> toSelect;
  7.   if (isEmpty(fields)) {
  8.     // SELECT * may yield unexpected column names, so we get the full list of fields to specify explicit aliases
  9.     toSelect = getFields();
  10.   } else {
  11.     toSelect = fields;
  12.   }
  13.   builder.appendConcatenatedCompilables(toSelect, ", ", forSqlValidation);
  14. }

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