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## org.springframework.core
Class PrioritizedParameterNameDiscoverer

    java.lang.Object
      org.springframework.core.PrioritizedParameterNameDiscoverer

All Implemented Interfaces:
  ParameterNameDiscoverer

    public class PrioritizedParameterNameDiscoverer

extends Object
implements ParameterNameDiscoverer

ParameterNameDiscoverer implementation that tries several ParameterNameDiscoverers in succession. Those added first in the `addDiscoverer` method have highest priority. If one returns `null`, the next will be tried.

The default behavior is always to return `null` if no discoverer matches.

Since:
  2.0
Author:
  Rod Johnson, Juergen Hoeller

Constructor Summary
`PrioritizedParameterNameDiscoverer()`

Method Summary
`void` | `addDiscoverer(ParameterNameDiscoverer pnd)` Add a further ParameterNameDiscoverer to the list of discoverers that this PrioritizedParameterNameDiscoverer checks.
`String[]` | `getParameterNames(Constructor ctor)` Return parameter names for this constructor, or `null` if they cannot be determined.
`String[]` | `getParameterNames(Method method)` Return parameter names for this method, or `null` if they cannot be determined.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### PrioritizedParameterNameDiscoverer

    public PrioritizedParameterNameDiscoverer()

Method Detail

### addDiscoverer

    public void addDiscoverer(ParameterNameDiscoverer pnd)

  Add a further ParameterNameDiscoverer to the list of discoverers that this PrioritizedParameterNameDiscoverer checks.

### getParameterNames

    public String[] getParameterNames(Method method)

  Description copied from interface: `ParameterNameDiscoverer`
  Return parameter names for this method, or `null` if they cannot be determined.

  Specified by:
    `getParameterNames` in interface `ParameterNameDiscoverer`
  Parameters:
    `method` - method to find parameter names for
  Returns:
    an array of parameter names if the names can be resolved, or `null` if they cannot

### getParameterNames

    public String[] getParameterNames(Constructor ctor)

  Description copied from interface: `ParameterNameDiscoverer`
  Return parameter names for this constructor, or `null` if they cannot be determined.

  Specified by:
    `getParameterNames` in interface `ParameterNameDiscoverer`
  Parameters:
    `ctor` - constructor to find parameter names for
  Returns:
    an array of parameter names if the names can be resolved, or `null` if they cannot

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