InvokeDynamicEntry (Java SE 25 & JDK 25)
Description: declaration: module: java.base, package: java.lang.classfile.constantpool, interface: InvokeDynamicEntry
Keywords: java.lang.classfile.constantpool.InvokeDynamicEntry interface

# Interface InvokeDynamicEntry

All Superinterfaces:
  `DynamicConstantPoolEntry, PoolEntry`

public sealed interface InvokeDynamicEntry extends DynamicConstantPoolEntry
Models a `CONSTANT_InvokeDynamic_info` structure, or the symbolic reference to a dynamically-computed call site, in the constant pool of a `class` file.

The use of a `InvokeDynamicEntry` is modeled by a `DynamicCallSiteDesc` symbolic descriptor. It can be obtained from `InvokeDynamicEntry::asSymbol` and converted back to a constant pool entry through `ConstantPoolBuilder::invokeDynamicEntry`.

An invoke dynamic entry is composite:

    InvokeDynamicEntry(
        BootstrapMethodEntry bootstrap,
        NameAndTypeEntry nameAndType
    )

where the `type` in the `nameAndType` is a method descriptor string.

API Note:
  A dynamically-computed call site is frequently called a dynamic call site, or an indy, from the abbreviation of "invoke dynamic".
See Java Virtual Machine Specification:
  4.4.10 The `CONSTANT_Dynamic_info` and `CONSTANT_InvokeDynamic_info` Structures
Since:
  24
See Also:
  - `ConstantPoolBuilder::invokeDynamicEntry`
  - `DynamicCallSiteDesc`
  - Dynamically-computed call sites

- ## Field Summary

  ### Fields declared in interface PoolEntry

  `TAG_CLASS, TAG_DOUBLE, TAG_DYNAMIC, TAG_FIELDREF, TAG_FLOAT, TAG_INTEGER, TAG_INTERFACE_METHODREF, TAG_INVOKE_DYNAMIC, TAG_LONG, TAG_METHOD_HANDLE, TAG_METHOD_TYPE, TAG_METHODREF, TAG_MODULE, TAG_NAME_AND_TYPE, TAG_PACKAGE, TAG_STRING, TAG_UTF8`

- ## Method Summary

  Modifier and Type
  Method
  Description
  `default DynamicCallSiteDesc`
  `asSymbol()`
  Returns a symbolic descriptor for this dynamic call site.
  `default MethodTypeDesc`
  `typeSymbol()`
  Returns a symbolic descriptor for the invocation type of this dynamic call site.

  ### Methods declared in interface DynamicConstantPoolEntry

  `bootstrap, bootstrapMethodIndex, name, nameAndType, type`

  ### Methods declared in interface PoolEntry

  `constantPool, index, tag, width`

- ## Method Details

  - ### typeSymbol

    default MethodTypeDesc typeSymbol()
    Returns a symbolic descriptor for the invocation type of this dynamic call site.
    Returns:
      a symbolic descriptor for the invocation type of this dynamic call site

  - ### asSymbol

    default DynamicCallSiteDesc asSymbol()
    Returns a symbolic descriptor for this dynamic call site.
    Returns:
      a symbolic descriptor for this dynamic call site
    See Also:
      - `ConstantPoolBuilder::invokeDynamicEntry(DynamicCallSiteDesc)`