Package nxt.addons

Class CloudDataClassLoader

java.lang.Object

java.lang.ClassLoader

java.security.SecureClassLoader

nxt.addons.CloudDataClassLoader

public class CloudDataClassLoader
extends SecureClassLoader

Load a contract and all its classes from data retrieved from the blockchain. The protection domain represents the permissions granted to the contract by aggregating permissions from the policy file in the following order 1. All default permissions provided by Java 2. Permissions from the "file://untrustedContractCode" codebase 3. Permissions from the "file://untrustedContractCode" codebase where signedBy is set to the public key of the account which uploaded the contract to the blockchain 4. Permissions from the "file://untrustedContractCode" codebase where principal is set to TransactionPrincipal followed by the transaction hash (full hash or tagged data hash or hash of the contract data)

Constructor Summary

Constructors

Constructor	Description
CloudDataClassLoader(Map<String,byte[]> classFileData, CodeSigner[] codeSigners, Principal[] principals)

Method Summary

Modifier and Type	Method	Description
protected Class<?>	findClass(String name)
protected Class<?>	loadClass(String name, boolean resolve)

Methods inherited from class java.security.SecureClassLoader

defineClass, defineClass, getPermissions

Methods inherited from class java.lang.ClassLoader

clearAssertionStatus, defineClass, defineClass, defineClass, defineClass, definePackage, findClass, findLibrary, findLoadedClass, findResource, findResource, findResources, findSystemClass, getClassLoadingLock, getDefinedPackage, getDefinedPackages, getName, getPackage, getPackages, getParent, getPlatformClassLoader, getResource, getResourceAsStream, getResources, getSystemClassLoader, getSystemResource, getSystemResourceAsStream, getSystemResources, getUnnamedModule, isRegisteredAsParallelCapable, loadClass, registerAsParallelCapable, resolveClass, resources, setClassAssertionStatus, setDefaultAssertionStatus, setPackageAssertionStatus, setSigners

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

CloudDataClassLoader

public CloudDataClassLoader(Map<String,byte[]> classFileData,
 CodeSigner[] codeSigners,
 Principal[] principals)

Method Details

findClass

protected Class<?> findClass(String name)
                      throws ClassNotFoundException

Overrides:

findClass in class ClassLoader

Throws:

ClassNotFoundException

loadClass

protected Class<?> loadClass(String name,
 boolean resolve)
                      throws ClassNotFoundException

Overrides:

loadClass in class ClassLoader

Throws:

ClassNotFoundException