程序包 cn.taketoday.expression.spel.ast

类 ConstructorReference

java.lang.Object
cn.taketoday.expression.spel.ast.SpelNodeImpl
cn.taketoday.expression.spel.ast.ConstructorReference
所有已实现的接口:
Opcodes, SpelNode
public class ConstructorReference extends SpelNodeImpl
Represents the invocation of a constructor. Either a constructor on a regular type or construction of an array. When an array is constructed, an initializer can be specified.

Examples

  • new example.Foo()
  • new String('hello world')
  • new int[] {1,2,3,4}
  • new String[] {'abc','xyz'}
  • new int[5]
  • new int[3][4]
从以下版本开始:
4.0
作者:
Andy Clement, Harry Yang, Juergen Hoeller, Sam Brannen

  • 字段详细资料

    • MAX_ARRAY_ELEMENTS

      private static final int MAX_ARRAY_ELEMENTS
      Maximum number of elements permitted in an array declaration, applying to one-dimensional as well as multi-dimensional arrays.
      另请参阅:

    • isArrayConstructor

      private final boolean isArrayConstructor

    • dimensions

      @Nullable private final SpelNodeImpl[] dimensions

    • cachedExecutor

      @Nullable private volatile ConstructorExecutor cachedExecutor
      The cached executor that may be reused on subsequent evaluations.

  • 构造器详细资料

    • ConstructorReference

      public ConstructorReference(int startPos, int endPos, SpelNodeImpl... arguments)
      Create a constructor reference. The first argument is the type, the rest are the parameters to the constructor call

    • ConstructorReference

      public ConstructorReference(int startPos, int endPos, SpelNodeImpl[] dimensions, SpelNodeImpl... arguments)
      Create a constructor reference. The first argument is the type, the rest are the parameters to the constructor call

  • 方法详细资料

    • getValueInternal

      public TypedValue getValueInternal(ExpressionState state) throws EvaluationException
      Implements getValue() - delegating to the code for building an array or a simple type.
      指定者:
      getValueInternal 在类中 SpelNodeImpl
      抛出:
      EvaluationException

    • createNewInstance

      private TypedValue createNewInstance(ExpressionState state) throws EvaluationException
      Create a new ordinary object and return it.
      参数:
      state - the expression state within which this expression is being evaluated
      返回:
      the new object
      抛出:
      EvaluationException - if there is a problem creating the object

    • findExecutorForConstructor

      private ConstructorExecutor findExecutorForConstructor(String typeName, List<TypeDescriptor> argumentTypes, ExpressionState state) throws SpelEvaluationException
      Go through the list of registered constructor resolvers and see if any can find a constructor that takes the specified set of arguments.
      参数:
      typeName - the type trying to be constructed
      argumentTypes - the types of the arguments supplied that the constructor must take
      state - the current state of the expression
      返回:
      a reusable ConstructorExecutor that can be invoked to run the constructor or null
      抛出:
      SpelEvaluationException - if there is a problem locating the constructor

    • toStringAST

      public String toStringAST()
      从接口复制的说明: SpelNode
      Return the string form the this AST node.
      返回:
      the string form

    • createArray

      private TypedValue createArray(ExpressionState state) throws EvaluationException
      Create an array and return it.
      参数:
      state - the expression state within which this expression is being evaluated
      返回:
      the new array
      抛出:
      EvaluationException - if there is a problem creating the array

    • checkNumElements

      private void checkNumElements(long numElements)

    • createReferenceTypeArray

      private Object createReferenceTypeArray(ExpressionState state, TypeConverter typeConverter, SpelNodeImpl[] children, Class<?> componentType)

    • createByteArray

      private byte[] createByteArray(ExpressionState state, TypeConverter converter, SpelNodeImpl[] children)

    • createFloatArray

      private float[] createFloatArray(ExpressionState state, TypeConverter typeConverter, SpelNodeImpl[] children)

    • createDoubleArray

      private double[] createDoubleArray(ExpressionState state, TypeConverter typeConverter, SpelNodeImpl[] children)

    • createShortArray

      private short[] createShortArray(ExpressionState state, TypeConverter typeConverter, SpelNodeImpl[] children)

    • createLongArray

      private long[] createLongArray(ExpressionState state, TypeConverter converter, SpelNodeImpl[] children)

    • createCharArray

      private char[] createCharArray(ExpressionState state, TypeConverter typeConverter, SpelNodeImpl[] children)

    • createBooleanArray

      private boolean[] createBooleanArray(ExpressionState state, TypeConverter typeConverter, SpelNodeImpl[] children)

    • createIntArray

      private int[] createIntArray(ExpressionState state, TypeConverter typeConverter, SpelNodeImpl[] children)

    • hasInitializer

      private boolean hasInitializer()

    • isCompilable

      public boolean isCompilable()
      从类复制的说明: SpelNodeImpl
      Check whether a node can be compiled to bytecode. The reasoning in each node may be different but will typically involve checking whether the exit type descriptor of the node is known and any relevant child nodes are compilable.
      覆盖:
      isCompilable 在类中 SpelNodeImpl
      返回:
      true if this node can be compiled to bytecode

    • generateCode

      public void generateCode(MethodVisitor mv, CodeFlow cf)
      从类复制的说明: SpelNodeImpl
      Generate the bytecode for this node into the supplied visitor. Context info about the current expression being compiled is available in the codeflow object, e.g. including information about the type of the object currently on the stack.
      覆盖:
      generateCode 在类中 SpelNodeImpl
      参数:
      mv - the ASM MethodVisitor into which code should be generated
      cf - a context object with info about what is on the stack