本文整理了Java中org.apache.calcite.util.Util.cast()方法的一些代码示例，展示了Util.cast()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。Util.cast()方法的具体详情如下：
包路径：org.apache.calcite.util.Util
类名称：Util
方法名：cast

Util.cast介绍

[英]Converts an Iterable whose members are automatically down-cast to a given type.

All modifications are automatically written to the backing iterator. Not synchronized.
[中]将其成员自动向下转换为给定类型的Iterable转换为给定类型。
所有修改都会自动写入支持迭代器。没有同步。

代码示例

代码示例来源：origin: Qihoo360/Quicksql

/**
 * Converts an {@link Iterable} whose members are automatically down-cast to
 * a given type.
 *
 * <p>All modifications are automatically written to the backing iterator.
 * Not synchronized.
 *
 * @param iterable Backing iterable
 * @param clazz    Class to cast to
 * @return An iterable whose members are of the desired type.
 */
public static <E> Iterable<E> cast(
  final Iterable<? super E> iterable,
  final Class<E> clazz) {
 return () -> cast(iterable.iterator(), clazz);
}

代码示例来源：origin: org.apache.calcite/calcite-core

/**
 * Converts an {@link Iterable} whose members are automatically down-cast to
 * a given type.
 *
 * <p>All modifications are automatically written to the backing iterator.
 * Not synchronized.
 *
 * @param iterable Backing iterable
 * @param clazz    Class to cast to
 * @return An iterable whose members are of the desired type.
 */
public static <E> Iterable<E> cast(
  final Iterable<? super E> iterable,
  final Class<E> clazz) {
 return () -> cast(iterable.iterator(), clazz);
}

代码示例来源：origin: Qihoo360/Quicksql

/**
  * Concatenates the operands of a call to this operator.
  */
 public static SqlLiteral concatenateOperands(SqlCall call) {
  final List<SqlNode> operandList = call.getOperandList();
  assert operandList.size() > 0;
  assert operandList.get(0) instanceof SqlLiteral
    : operandList.get(0).getClass();
  return SqlUtil.concatenateLiterals(
    Util.cast(operandList, SqlLiteral.class));
 }
}

代码示例来源：origin: org.apache.calcite/calcite-core

/**
  * Concatenates the operands of a call to this operator.
  */
 public static SqlLiteral concatenateOperands(SqlCall call) {
  final List<SqlNode> operandList = call.getOperandList();
  assert operandList.size() > 0;
  assert operandList.get(0) instanceof SqlLiteral
    : operandList.get(0).getClass();
  return SqlUtil.concatenateLiterals(
    Util.cast(operandList, SqlLiteral.class));
 }
}

代码示例来源：origin: Qihoo360/Quicksql

/**
 * Tests {@link org.apache.calcite.util.CastingList} and {@link Util#cast}.
 */
@Test public void testCastingList() {
 final List<Number> numberList = new ArrayList<>();
 numberList.add(1);
 numberList.add(null);
 numberList.add(2);
 List<Integer> integerList = Util.cast(numberList, Integer.class);
 assertEquals(3, integerList.size());
 assertEquals(Integer.valueOf(2), integerList.get(2));
 // Nulls are OK.
 assertNull(integerList.get(1));
 // Can update the underlying list.
 integerList.set(1, 345);
 assertEquals(Integer.valueOf(345), integerList.get(1));
 integerList.set(1, null);
 assertNull(integerList.get(1));
 // Can add a member of the wrong type to the underlying list.
 numberList.add(3.1415D);
 assertEquals(4, integerList.size());
 // Access a member which is of the wrong type.
 try {
  integerList.get(3);
  fail("expected exception");
 } catch (ClassCastException e) {
  // ok
 }
}

代码示例来源：origin: org.apache.calcite/calcite-core

/**
 * Tests {@link org.apache.calcite.util.CastingList} and {@link Util#cast}.
 */
@Test public void testCastingList() {
 final List<Number> numberList = new ArrayList<>();
 numberList.add(1);
 numberList.add(null);
 numberList.add(2);
 List<Integer> integerList = Util.cast(numberList, Integer.class);
 assertEquals(3, integerList.size());
 assertEquals(Integer.valueOf(2), integerList.get(2));
 // Nulls are OK.
 assertNull(integerList.get(1));
 // Can update the underlying list.
 integerList.set(1, 345);
 assertEquals(Integer.valueOf(345), integerList.get(1));
 integerList.set(1, null);
 assertNull(integerList.get(1));
 // Can add a member of the wrong type to the underlying list.
 numberList.add(3.1415D);
 assertEquals(4, integerList.size());
 // Access a member which is of the wrong type.
 try {
  integerList.get(3);
  fail("expected exception");
 } catch (ClassCastException e) {
  // ok
 }
}