hazendaz / jmockit1 / 496

Committed 15 Nov 2025 05:33PM UTC coverage: 72.192% (-0.008%) from 72.2%

Build # 496

Build Type

push

github

Committed by

web-flow

Commit Message

Merge pull request #412 from hazendaz/renovate/major-spring-core

Update spring core to v7 (major)

Run Details

5677 of 8360 branches covered (67.91%)

Branch coverage included in aggregate %.

11922 of 16018 relevant lines covered (74.43%)

0.74 hits per line

Source File
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88.46

/main/src/main/java/mockit/internal/classGeneration/ImplementationClass.java

/*
 * MIT License
 * Copyright (c) 2006-2025 JMockit developers
 * See LICENSE file for full license text.
 */
package mockit.internal.classGeneration;

import edu.umd.cs.findbugs.annotations.NonNull;
import edu.umd.cs.findbugs.annotations.Nullable;

import java.lang.reflect.Type;

import mockit.asm.classes.ClassReader;
import mockit.asm.classes.ClassVisitor;
import mockit.internal.ClassFile;
import mockit.internal.util.ClassLoad;
import mockit.internal.util.GeneratedClasses;
import mockit.internal.util.Utilities;

/**
 * Allows the creation of new implementation classes for interfaces and abstract classes.
 */
public abstract class ImplementationClass<T> {
    @NonNull
    protected final Class<?> sourceClass;
    @NonNull
    protected String generatedClassName;
    @Nullable
    private byte[] generatedBytecode;

    protected ImplementationClass(@NonNull Type mockedType) {
        this(Utilities.getClassType(mockedType));
    }

    protected ImplementationClass(@NonNull Class<?> mockedClass) {
        this(mockedClass, GeneratedClasses.getNameForGeneratedClass(mockedClass, null));
    }

    protected ImplementationClass(@NonNull Class<?> sourceClass, @NonNull String desiredClassName) {
        this.sourceClass = sourceClass;
        generatedClassName = desiredClassName;
    }

    @NonNull
    public final Class<T> generateClass() {
        ClassReader classReader = ClassFile.createReaderOrGetFromCache(sourceClass);

        ClassVisitor modifier = createMethodBodyGenerator(classReader);
        classReader.accept(modifier);

        return defineNewClass(modifier);
    }

    @NonNull
    protected abstract ClassVisitor createMethodBodyGenerator(@NonNull ClassReader cr);

    @NonNull
    private Class<T> defineNewClass(@NonNull ClassVisitor modifier) {
        final ClassLoader parentLoader = ClassLoad.getClassLoaderWithAccess(sourceClass);
        final byte[] modifiedClassfile = modifier.toByteArray();

        try {
            @SuppressWarnings("unchecked")
            Class<T> generatedClass = (Class<T>) new ClassLoader(parentLoader) {
                @Override
                protected Class<?> findClass(String name) throws ClassNotFoundException {
                    if (!name.equals(generatedClassName)) {
                        return parentLoader.loadClass(name);
                    }

                    return defineClass(name, modifiedClassfile, 0, modifiedClassfile.length);
                }
            }.findClass(generatedClassName);
            generatedBytecode = modifiedClassfile;

            return generatedClass;
        } catch (ClassNotFoundException e) {
            throw new RuntimeException("Unable to define class: " + generatedClassName, e);
        }
    }

    @Nullable
    public final byte[] getGeneratedBytecode() {
        return generatedBytecode;
    }
}

1	/*
2	* MIT License
3	* Copyright (c) 2006-2025 JMockit developers
4	* See LICENSE file for full license text.
5	*/
6	package mockit.internal.classGeneration;
7
8	import edu.umd.cs.findbugs.annotations.NonNull;
9	import edu.umd.cs.findbugs.annotations.Nullable;
10
11	import java.lang.reflect.Type;
12
13	import mockit.asm.classes.ClassReader;
14	import mockit.asm.classes.ClassVisitor;
15	import mockit.internal.ClassFile;
16	import mockit.internal.util.ClassLoad;
17	import mockit.internal.util.GeneratedClasses;
18	import mockit.internal.util.Utilities;
19
20	/**
21	* Allows the creation of new implementation classes for interfaces and abstract classes.
22	*/
23	public abstract class ImplementationClass<T> {
24	@NonNull
25	protected final Class<?> sourceClass;
26	@NonNull
27	protected String generatedClassName;
28	@Nullable
29	private byte[] generatedBytecode;
30
31	protected ImplementationClass(@NonNull Type mockedType) {
32	this(Utilities.getClassType(mockedType));	1✔
33	}	1✔
34
35	protected ImplementationClass(@NonNull Class<?> mockedClass) {
36	this(mockedClass, GeneratedClasses.getNameForGeneratedClass(mockedClass, null));	1✔
37	}	1✔
38
39	protected ImplementationClass(@NonNull Class<?> sourceClass, @NonNull String desiredClassName) {	1✔
40	this.sourceClass = sourceClass;	1✔
41	generatedClassName = desiredClassName;	1✔
42	}	1✔
43
44	@NonNull
45	public final Class<T> generateClass() {
46	ClassReader classReader = ClassFile.createReaderOrGetFromCache(sourceClass);	1✔
47
48	ClassVisitor modifier = createMethodBodyGenerator(classReader);	1✔
49	classReader.accept(modifier);	1✔
50
51	return defineNewClass(modifier);	1✔
52	}
53
54	@NonNull
55	protected abstract ClassVisitor createMethodBodyGenerator(@NonNull ClassReader cr);
56
57	@NonNull
58	private Class<T> defineNewClass(@NonNull ClassVisitor modifier) {
59	final ClassLoader parentLoader = ClassLoad.getClassLoaderWithAccess(sourceClass);	1✔
60	final byte[] modifiedClassfile = modifier.toByteArray();	1✔
61
62	try {
63	@SuppressWarnings("unchecked")
64	Class<T> generatedClass = (Class<T>) new ClassLoader(parentLoader) {	1✔
65	@Override
66	protected Class<?> findClass(String name) throws ClassNotFoundException {
67	if (!name.equals(generatedClassName)) {	1✔
68	return parentLoader.loadClass(name);	×
69	}
70
71	return defineClass(name, modifiedClassfile, 0, modifiedClassfile.length);	1✔
72	}
73	}.findClass(generatedClassName);	1✔
74	generatedBytecode = modifiedClassfile;	1✔
75
76	return generatedClass;	1✔
77	} catch (ClassNotFoundException e) {	×
78	throw new RuntimeException("Unable to define class: " + generatedClassName, e);	×
79	}
80	}
81
82	@Nullable
83	public final byte[] getGeneratedBytecode() {
84	return generatedBytecode;	1✔
85	}
86	}

hazendaz / jmockit1 / 496

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