https://github.com/spring-projects/spring-framework: Spring Core (Spring IO)
  • Juergen Hoeller 
// ASM: a very small and fast Java bytecode manipulation framework
// Copyright (c) 2000-2011 INRIA, France Telecom
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//
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package org.springframework.asm;


A reference to a field or a method.

Author:Remi Forax, Eric Bruneton
/**
 * A reference to a field or a method.
 *
 * @author Remi Forax
 * @author Eric Bruneton
 */
public final class Handle {

  /**
   * The kind of field or method designated by this Handle. Should be {@link Opcodes#H_GETFIELD},
   * {@link Opcodes#H_GETSTATIC}, {@link Opcodes#H_PUTFIELD}, {@link Opcodes#H_PUTSTATIC}, {@link
   * Opcodes#H_INVOKEVIRTUAL}, {@link Opcodes#H_INVOKESTATIC}, {@link Opcodes#H_INVOKESPECIAL},
   * {@link Opcodes#H_NEWINVOKESPECIAL} or {@link Opcodes#H_INVOKEINTERFACE}.
   */
  private final int tag;

  
The internal name of the class that owns the field or method designated by this handle. 
/** The internal name of the class that owns the field or method designated by this handle. */
  private final String owner;

  
The name of the field or method designated by this handle. 
/** The name of the field or method designated by this handle. */
  private final String name;

  
The descriptor of the field or method designated by this handle. 
/** The descriptor of the field or method designated by this handle. */
  private final String descriptor;

  
Whether the owner is an interface or not. 
/** Whether the owner is an interface or not. */
  private final boolean isInterface;

  
Constructs a new field or method handle.

Params:
Deprecated:this constructor has been superseded by Handle(int, String, String, String, boolean).
/**
   * Constructs a new field or method handle.
   *
   * @param tag the kind of field or method designated by this Handle. Must be {@link
   *     Opcodes#H_GETFIELD}, {@link Opcodes#H_GETSTATIC}, {@link Opcodes#H_PUTFIELD}, {@link
   *     Opcodes#H_PUTSTATIC}, {@link Opcodes#H_INVOKEVIRTUAL}, {@link Opcodes#H_INVOKESTATIC},
   *     {@link Opcodes#H_INVOKESPECIAL}, {@link Opcodes#H_NEWINVOKESPECIAL} or {@link
   *     Opcodes#H_INVOKEINTERFACE}.
   * @param owner the internal name of the class that owns the field or method designated by this
   *     handle.
   * @param name the name of the field or method designated by this handle.
   * @param descriptor the descriptor of the field or method designated by this handle.
   * @deprecated this constructor has been superseded by {@link #Handle(int, String, String, String,
   *     boolean)}.
   */
  @Deprecated
  public Handle(final int tag, final String owner, final String name, final String descriptor) {
    this(tag, owner, name, descriptor, tag == Opcodes.H_INVOKEINTERFACE);
  }

  
Constructs a new field or method handle.

Params:
/**
   * Constructs a new field or method handle.
   *
   * @param tag the kind of field or method designated by this Handle. Must be {@link
   *     Opcodes#H_GETFIELD}, {@link Opcodes#H_GETSTATIC}, {@link Opcodes#H_PUTFIELD}, {@link
   *     Opcodes#H_PUTSTATIC}, {@link Opcodes#H_INVOKEVIRTUAL}, {@link Opcodes#H_INVOKESTATIC},
   *     {@link Opcodes#H_INVOKESPECIAL}, {@link Opcodes#H_NEWINVOKESPECIAL} or {@link
   *     Opcodes#H_INVOKEINTERFACE}.
   * @param owner the internal name of the class that owns the field or method designated by this
   *     handle.
   * @param name the name of the field or method designated by this handle.
   * @param descriptor the descriptor of the field or method designated by this handle.
   * @param isInterface whether the owner is an interface or not.
   */
  public Handle(
      final int tag,
      final String owner,
      final String name,
      final String descriptor,
      final boolean isInterface) {
    this.tag = tag;
    this.owner = owner;
    this.name = name;
    this.descriptor = descriptor;
    this.isInterface = isInterface;
  }

  
Returns the kind of field or method designated by this handle.

Returns:Opcodes.H_GETFIELD, Opcodes.H_GETSTATIC, Opcodes.H_PUTFIELD, Opcodes.H_PUTSTATIC, Opcodes.H_INVOKEVIRTUAL, Opcodes.H_INVOKESTATIC, Opcodes.H_INVOKESPECIAL, Opcodes.H_NEWINVOKESPECIAL or Opcodes.H_INVOKEINTERFACE.
/**
   * Returns the kind of field or method designated by this handle.
   *
   * @return {@link Opcodes#H_GETFIELD}, {@link Opcodes#H_GETSTATIC}, {@link Opcodes#H_PUTFIELD},
   *     {@link Opcodes#H_PUTSTATIC}, {@link Opcodes#H_INVOKEVIRTUAL}, {@link
   *     Opcodes#H_INVOKESTATIC}, {@link Opcodes#H_INVOKESPECIAL}, {@link
   *     Opcodes#H_NEWINVOKESPECIAL} or {@link Opcodes#H_INVOKEINTERFACE}.
   */
  public int getTag() {
    return tag;
  }

  
Returns the internal name of the class that owns the field or method designated by this handle.

Returns:the internal name of the class that owns the field or method designated by this handle.
/**
   * Returns the internal name of the class that owns the field or method designated by this handle.
   *
   * @return the internal name of the class that owns the field or method designated by this handle.
   */
  public String getOwner() {
    return owner;
  }

  
Returns the name of the field or method designated by this handle.

Returns:the name of the field or method designated by this handle.
/**
   * Returns the name of the field or method designated by this handle.
   *
   * @return the name of the field or method designated by this handle.
   */
  public String getName() {
    return name;
  }

  
Returns the descriptor of the field or method designated by this handle.

Returns:the descriptor of the field or method designated by this handle.
/**
   * Returns the descriptor of the field or method designated by this handle.
   *
   * @return the descriptor of the field or method designated by this handle.
   */
  public String getDesc() {
    return descriptor;
  }

  
Returns true if the owner of the field or method designated by this handle is an interface.

Returns:true if the owner of the field or method designated by this handle is an interface.
/**
   * Returns true if the owner of the field or method designated by this handle is an interface.
   *
   * @return true if the owner of the field or method designated by this handle is an interface.
   */
  public boolean isInterface() {
    return isInterface;
  }

  @Override
  public boolean equals(final Object object) {
    if (object == this) {
      return true;
    }
    if (!(object instanceof Handle)) {
      return false;
    }
    Handle handle = (Handle) object;
    return tag == handle.tag
        && isInterface == handle.isInterface
        && owner.equals(handle.owner)
        && name.equals(handle.name)
        && descriptor.equals(handle.descriptor);
  }

  @Override
  public int hashCode() {
    return tag
        + (isInterface ? 64 : 0)
        + owner.hashCode() * name.hashCode() * descriptor.hashCode();
  }

  
Returns the textual representation of this handle. The textual representation is:

    
  
  • for a reference to a class: owner "." name descriptor " (" tag ")",
  
  • for a reference to an interface: owner "." name descriptor " (" tag " itf)".



/**
   * Returns the textual representation of this handle. The textual representation is:
   *
   * <ul>
   *   <li>for a reference to a class: owner "." name descriptor " (" tag ")",
   *   <li>for a reference to an interface: owner "." name descriptor " (" tag " itf)".
   * </ul>
   */
  @Override
  public String toString() {
    return owner + '.' + name + descriptor + " (" + tag + (isInterface ? " itf" : "") + ')';
  }
}