TagValue

java.lang.Object
- io.opencensus.tags.TagValue

Direct Known Subclasses:

AutoValue_TagValue
```
@Immutable
public abstract class TagValue
extends java.lang.Object
```
A validated tag value.
Validation ensures that the String has a maximum length of MAX_LENGTH and contains only printable ASCII characters.

Since:

0.8

Field Summary

Fields
Modifier and Type Field Description

static int MAX_LENGTH
The maximum length for a tag value.

Constructor Summary

Constructors
Constructor Description

TagValue()

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`abstract java.lang.String`	`asString()`	Returns the tag value as a `String`.
`static TagValue`	`create(java.lang.String value)`	Constructs a `TagValue` from the given string.
`private static boolean`	`isValid(java.lang.String value)`	Determines whether the given `String` is a valid tag value.

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

- Field Detail
  - MAX_LENGTH
```
public static final int MAX_LENGTH
```
    The maximum length for a tag value. The value is 255.
    
    Since:
    
    0.8
    
    See Also:
    
    Constant Field Values
- Constructor Detail
  - TagValue
```
TagValue()
```
- Method Detail
  - create
```
public static TagValue create(java.lang.String value)
```
    Constructs a TagValue from the given string. The string must meet the following requirements:
    
    It cannot be longer than MAX_LENGTH.
    It can only contain printable ASCII characters.
    Parameters:
    
    value - the tag value.
    
    Throws:
    
    java.lang.IllegalArgumentException - if the String is not valid.
    
    Since:
    
    0.8
  - asString
```
public abstract java.lang.String asString()
```
    Returns the tag value as a String.
    
    Returns:
    
    the tag value as a String.
    
    Since:
    
    0.8
  - isValid
```
private static boolean isValid(java.lang.String value)
```
    Determines whether the given String is a valid tag value.
    
    Parameters:
    
    value - the tag value to be validated.
    
    Returns:
    
    whether the value is valid.