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## org.apache.lucene.util.mutable
Class MutableValue

    java.lang.Object
      org.apache.lucene.util.mutable.MutableValue

All Implemented Interfaces:
  Comparable<MutableValue>

Direct Known Subclasses:
  MutableValueBool, MutableValueDouble, MutableValueFloat, MutableValueInt, MutableValueLong, MutableValueStr

    public abstract class MutableValue

extends Object
implements Comparable<MutableValue>

Base class for all mutable values.

NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.

Field Summary
`boolean` | `exists`

Constructor Summary
`MutableValue()`

Method Summary
`abstract int` | `compareSameType(Object other)`
`int` | `compareTo(MutableValue other)`
`abstract void` | `copy(MutableValue source)`
`abstract MutableValue` | `duplicate()`
`boolean` | `equals(Object other)`
`abstract boolean` | `equalsSameType(Object other)`
`boolean` | `exists()`
`abstract int` | `hashCode()`
`abstract Object` | `toObject()`
`String` | `toString()`

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

Field Detail

### exists

    public boolean exists

Constructor Detail

### MutableValue

    public MutableValue()

Method Detail

### copy

    public abstract void copy(MutableValue source)

### duplicate

    public abstract MutableValue duplicate()

### equalsSameType

    public abstract boolean equalsSameType(Object other)

### compareSameType

    public abstract int compareSameType(Object other)

### toObject

    public abstract Object toObject()

### exists

    public boolean exists()

### compareTo

    public int compareTo(MutableValue other)

  Specified by:
    `compareTo` in interface `Comparable<MutableValue>`

### equals

    public boolean equals(Object other)

  Overrides:
    `equals` in class `Object`

### hashCode

    public abstract int hashCode()

  Overrides:
    `hashCode` in class `Object`

### toString

    public String toString()

  Overrides:
    `toString` in class `Object`

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