ClassFileMetaData (Lombok)

java.lang.Object
- lombok.bytecode.ClassFileMetaData

```
public class ClassFileMetaData
extends java.lang.Object
```
Utility to read the constant pool, header, and inheritance information of any class file.

Constructor Summary

Constructors
Constructor and Description

ClassFileMetaData(byte[] byteCode)

Constructors
Constructor and Description
`ClassFileMetaData(byte[] byteCode)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`boolean`	`containsDouble(double value)` Checks if the constant pool contains the provided double constant, which implies the constant is used somewhere in the code.
`boolean`	`containsFloat(float value)` Checks if the constant pool contains the provided float constant, which implies the constant is used somewhere in the code.
`boolean`	`containsInteger(int value)` Checks if the constant pool contains the provided int constant, which implies the constant is used somewhere in the code.
`boolean`	`containsLong(long value)` Checks if the constant pool contains the provided long constant, which implies the constant is used somewhere in the code.
`boolean`	`containsStringConstant(java.lang.String value)` Checks if the constant pool contains the provided string constant, which implies the constant is used somewhere in the code.
`boolean`	`containsUtf8(java.lang.String value)` Checks if the constant pool contains the provided 'raw' string.
`java.lang.String`	`getClassName()` Returns the name of the class in JVM format, such as `java/lang/String`
`java.util.List<java.lang.String>`	`getInterfaces()` Returns the name of all implemented interfaces.
`java.lang.String`	`getSuperClassName()` Returns the name of the superclass in JVM format, such as `java/lang/Object` NB: If you try this on Object itself, you'll get `null`. NB2: For interfaces and annotation interfaces, you'll always get `java/lang/Object`
`java.lang.String`	`poolContent()` A `toString()` like utility to dump all contents of the constant pool into a string.
`boolean`	`usesClass(java.lang.String className)` Checks if the constant pool contains a reference to the provided class.
`boolean`	`usesField(java.lang.String className, java.lang.String fieldName)` Checks if the constant pool contains a reference to a given field, either for writing or reading.
`boolean`	`usesMethod(java.lang.String className, java.lang.String methodName)` Checks if the constant pool contains a reference to a given method, with any signature (return type and parameter types).
`boolean`	`usesMethod(java.lang.String className, java.lang.String methodName, java.lang.String descriptor)` Checks if the constant pool contains a reference to a given method.

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

- Constructor Detail
  - ClassFileMetaData
```
public ClassFileMetaData(byte[] byteCode)
```
- Method Detail
  - containsUtf8
```
public boolean containsUtf8(java.lang.String value)
```
    Checks if the constant pool contains the provided 'raw' string. These are used as source material for further JVM types, such as string constants, type references, etcetera.
  - usesClass
```
public boolean usesClass(java.lang.String className)
```
    Checks if the constant pool contains a reference to the provided class. NB: Most uses of a type do NOT show up as a class in the constant pool. For example, the parameter types and return type of any method you invoke or declare, are stored as signatures and not as type references, but the type to which any method you invoke belongs, is. Read the JVM Specification for more information.
    
    Parameters:
    
    className - must be provided JVM-style, such as java/lang/String
  - usesField
```
public boolean usesField(java.lang.String className,
                         java.lang.String fieldName)
```
    Checks if the constant pool contains a reference to a given field, either for writing or reading.
    
    Parameters:
    
    className - must be provided JVM-style, such as java/lang/String
  - usesMethod
```
public boolean usesMethod(java.lang.String className,
                          java.lang.String methodName)
```
    Checks if the constant pool contains a reference to a given method, with any signature (return type and parameter types).
    
    Parameters:
    
    className - must be provided JVM-style, such as java/lang/String
  - usesMethod
```
public boolean usesMethod(java.lang.String className,
                          java.lang.String methodName,
                          java.lang.String descriptor)
```
    Checks if the constant pool contains a reference to a given method.
    
    Parameters:
    
    className - must be provided JVM-style, such as java/lang/String
    
    descriptor - must be provided JVM-style, such as (IZ)Ljava/lang/String;
  - containsStringConstant
```
public boolean containsStringConstant(java.lang.String value)
```
    Checks if the constant pool contains the provided string constant, which implies the constant is used somewhere in the code. NB: String literals get concatenated by the compiler. NB2: This method does NOT do any kind of normalization.
  - containsLong
```
public boolean containsLong(long value)
```
    Checks if the constant pool contains the provided long constant, which implies the constant is used somewhere in the code. NB: compile-time constant expressions are evaluated at compile time.
  - containsDouble
```
public boolean containsDouble(double value)
```
    Checks if the constant pool contains the provided double constant, which implies the constant is used somewhere in the code. NB: compile-time constant expressions are evaluated at compile time.
  - containsInteger
```
public boolean containsInteger(int value)
```
    Checks if the constant pool contains the provided int constant, which implies the constant is used somewhere in the code. NB: compile-time constant expressions are evaluated at compile time.
  - containsFloat
```
public boolean containsFloat(float value)
```
    Checks if the constant pool contains the provided float constant, which implies the constant is used somewhere in the code. NB: compile-time constant expressions are evaluated at compile time.
  - getClassName
```
public java.lang.String getClassName()
```
    Returns the name of the class in JVM format, such as java/lang/String
  - getSuperClassName
```
public java.lang.String getSuperClassName()
```
    Returns the name of the superclass in JVM format, such as java/lang/Object NB: If you try this on Object itself, you'll get null.
    NB2: For interfaces and annotation interfaces, you'll always get java/lang/Object
  - getInterfaces
```
public java.util.List<java.lang.String> getInterfaces()
```
    Returns the name of all implemented interfaces.
  - poolContent
```
public java.lang.String poolContent()
```
    A toString() like utility to dump all contents of the constant pool into a string. NB: No guarantees are made about the exact layout of this string. It is for informational purposes only, don't try to parse it.
    NB2: After a double or long, there's a JVM spec-mandated gap, which is listed as (cont.) in the returned string.

Class ClassFileMetaData

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

ClassFileMetaData

Method Detail

containsUtf8

usesClass

usesField

usesMethod

usesMethod

containsStringConstant

containsLong

containsDouble

containsInteger

containsFloat

getClassName

getSuperClassName

getInterfaces

poolContent