FieldInstruction (jakarta-bcel 5.2 API)
Keywords: org.apache.bcel.generic.FieldInstruction class

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## org.apache.bcel.generic
Class FieldInstruction

    java.lang.Object
      org.apache.bcel.generic.Instruction
          org.apache.bcel.generic.CPInstruction
              org.apache.bcel.generic.FieldOrMethod
                  org.apache.bcel.generic.FieldInstruction

All Implemented Interfaces:
  Serializable, Cloneable, IndexedInstruction, LoadClass, TypedInstruction

Direct Known Subclasses:
  GETFIELD, GETSTATIC, PUTFIELD, PUTSTATIC

    public abstract class FieldInstruction

extends FieldOrMethod
implements TypedInstruction

Super class for the GET/PUTxxx family of instructions.

Version:
  $Id: FieldInstruction.java 386056 2006-03-15 11:31:56Z tcurdt $
See Also:
  Serialized Form

Field Summary

Fields inherited from class org.apache.bcel.generic.CPInstruction
`index`

Fields inherited from class org.apache.bcel.generic.Instruction
`length, opcode`

Constructor Summary
`protected` | `FieldInstruction(short opcode, int index)`

Method Summary
`String` | `getFieldName(ConstantPoolGen cpg)`
`protected int` | `getFieldSize(ConstantPoolGen cpg)`
`Type` | `getFieldType(ConstantPoolGen cpg)`
`Type` | `getType(ConstantPoolGen cpg)` Returns the type associated with this instruction.
`String` | `toString(ConstantPool cp)`

Methods inherited from class org.apache.bcel.generic.FieldOrMethod
`getClassName, getClassType, getLoadClassType, getName, getReferenceType, getSignature`

Methods inherited from class org.apache.bcel.generic.CPInstruction
`dump, getIndex, initFromFile, setIndex, toString`

Methods inherited from class org.apache.bcel.generic.Instruction
`accept, consumeStack, copy, equals, getComparator, getLength, getName, getOpcode, produceStack, readInstruction, setComparator, toString`

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

Constructor Detail

### FieldInstruction

    protected FieldInstruction(short opcode,
                               int index)

Parameters:
  `index` - to constant pool

Method Detail

### toString

    public String toString(ConstantPool cp)

  Overrides:
    `toString` in class `CPInstruction`
  Returns:
    mnemonic for instruction with symbolic references resolved

### getFieldSize

    protected int getFieldSize(ConstantPoolGen cpg)

  Returns:
    size of field (1 or 2)

### getType

    public Type getType(ConstantPoolGen cpg)

  Description copied from interface: `LoadClass`
  Returns the type associated with this instruction. LoadClass instances are always typed, but this type does not always refer to the type of the class or interface that it possibly forces to load. For example, GETFIELD would return the type of the field and not the type of the class where the field is defined. If no class is forced to be loaded, null is returned. An example for this is an ANEWARRAY instruction that creates an int[][].

  Specified by:
    `getType` in interface `LoadClass`
  Specified by:
    `getType` in interface `TypedInstruction`
  Overrides:
    `getType` in class `CPInstruction`
  Returns:
    return type of referenced field
  See Also:
    `LoadClass.getLoadClassType(ConstantPoolGen)`

### getFieldType

    public Type getFieldType(ConstantPoolGen cpg)

  Returns:
    type of field

### getFieldName

    public String getFieldName(ConstantPoolGen cpg)

  Returns:
    name of referenced field.

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