Java ClassVisitor.visitMethod方法代码示例

import jdk.internal.org.objectweb.asm.ClassVisitor; //导入方法依赖的package包/类
static void addGetter(final ClassVisitor cv, final String owner, final MemberInfo memInfo) {
    final int access = ACC_PUBLIC;
    final String name = GETTER_PREFIX + memInfo.getJavaName();
    final String desc = getterDesc(memInfo);
    final MethodVisitor mv = cv.visitMethod(access, name, desc, null, null);
    final MethodGenerator mi = new MethodGenerator(mv, access, name, desc);
    mi.visitCode();
    if (memInfo.isStatic() && memInfo.getKind() == Kind.PROPERTY) {
        mi.getStatic(owner, memInfo.getJavaName(), memInfo.getJavaDesc());
    } else {
        mi.loadLocal(0);
        mi.getField(owner, memInfo.getJavaName(), memInfo.getJavaDesc());
    }
    mi.returnValue();
    mi.computeMaxs();
    mi.visitEnd();
}
 

import jdk.internal.org.objectweb.asm.ClassVisitor; //导入方法依赖的package包/类
static void addSetter(final ClassVisitor cv, final String owner, final MemberInfo memInfo) {
    final int access = ACC_PUBLIC;
    final String name = SETTER_PREFIX + memInfo.getJavaName();
    final String desc = setterDesc(memInfo);
    final MethodVisitor mv = cv.visitMethod(access, name, desc, null, null);
    final MethodGenerator mi = new MethodGenerator(mv, access, name, desc);
    mi.visitCode();
    if (memInfo.isStatic() && memInfo.getKind() == Kind.PROPERTY) {
        mi.loadLocal(1);
        mi.putStatic(owner, memInfo.getJavaName(), memInfo.getJavaDesc());
    } else {
        mi.loadLocal(0);
        mi.loadLocal(1);
        mi.putField(owner, memInfo.getJavaName(), memInfo.getJavaDesc());
    }
    mi.returnVoid();
    mi.computeMaxs();
    mi.visitEnd();
}
 

import jdk.internal.org.objectweb.asm.ClassVisitor; //导入方法依赖的package包/类
/**
 * Makes the given class visitor visit this method.
 *
 * @param cv
 *            a class visitor.
 */
public void accept(final ClassVisitor cv) {
    String[] exceptions = new String[this.exceptions.size()];
    this.exceptions.toArray(exceptions);
    MethodVisitor mv = cv.visitMethod(access, name, desc, signature,
            exceptions);
    if (mv != null) {
        accept(mv);
    }
}
 

import jdk.internal.org.objectweb.asm.ClassVisitor; //导入方法依赖的package包/类
static MethodGenerator makeConstructor(final ClassVisitor cv) {
    final int access = 0;
    final String name = INIT;
    final String desc = DEFAULT_INIT_DESC;
    final MethodVisitor mv = cv.visitMethod(access, name, desc, null, null);
    return new MethodGenerator(mv, access, name, desc);
}
 

import jdk.internal.org.objectweb.asm.ClassVisitor; //导入方法依赖的package包/类
public Method(ClassConstruct ownerClass, ClassVisitor cv, String name, String descriptor, int access,
              ClassBuilder.ExecutionMode execMode) {
    this.ownerClassName = ownerClass.getName();
    this.ownerClass = ownerClass;
    this.execMode = execMode;
    this.cv = cv;
    mv = cv.visitMethod(access, name, descriptor, null, null);
    mv.visitCode();
}
 

import jdk.internal.org.objectweb.asm.ClassVisitor; //导入方法依赖的package包/类
private static void generateTestMethod(ClassVisitor cv,
        Label unstableIfLocation) {
    MethodVisitor mv = cv.visitMethod(ACC_PUBLIC | ACC_STATIC, METHOD_NAME,
            "(Z)V", null, null);
    mv.visitCode();

    Label end = new Label();
    Label falseBranch = new Label();

    // push "field" field's value and 1 to stack
    mv.visitFieldInsn(GETSTATIC, CLASS_NAME, FIELD_NAME, "I");
    mv.visitInsn(ICONST_1);
    // load argument's value
    mv.visitVarInsn(ILOAD, 0); // alwaysTrue
    // here is our unstable if
    mv.visitLabel(unstableIfLocation);
    mv.visitJumpInsn(IFEQ, falseBranch);
    // increment on "true"
    mv.visitInsn(IADD);
    mv.visitJumpInsn(GOTO, end);
    // decrement on "false"
    mv.visitLabel(falseBranch);
    mv.visitInsn(ISUB);
    mv.visitLabel(end);
    // bye bye
    mv.visitInsn(RETURN);

    mv.visitMaxs(0, 0);
    mv.visitEnd();
}
 

import jdk.internal.org.objectweb.asm.ClassVisitor; //导入方法依赖的package包/类
public Method(ClassConstruct ownerClass, ClassVisitor cv, String name, String descriptor, int access,
              ClassBuilder.ExecutionMode execMode) {
    this.ownerClassName = ownerClass.getName();
    this.ownerClass = ownerClass;
    this.isInterface = ownerClass.isInterface();
    this.execMode = execMode;
    this.cv = cv;
    mv = cv.visitMethod(access, name, descriptor, null, null);
    mv.visitCode();
}
 

import jdk.internal.org.objectweb.asm.ClassVisitor; //导入方法依赖的package包/类
static MethodGenerator makeStaticInitializer(final ClassVisitor cv, final String name) {
    final int access =  ACC_PUBLIC | ACC_STATIC;
    final String desc = DEFAULT_INIT_DESC;
    final MethodVisitor mv = cv.visitMethod(access, name, desc, null, null);
    return new MethodGenerator(mv, access, name, desc);
}
 

import jdk.internal.org.objectweb.asm.ClassVisitor; //导入方法依赖的package包/类
static MethodGenerator makeMethod(final ClassVisitor cv, final int access, final String name, final String desc) {
    final MethodVisitor mv = cv.visitMethod(access, name, desc, null, null);
    return new MethodGenerator(mv, access, name, desc);
}
 

import jdk.internal.org.objectweb.asm.ClassVisitor; //导入方法依赖的package包/类
/**
 * Creates a new {@link GeneratorAdapter}. <i>Subclasses must not use this
 * constructor</i>. Instead, they must use the
 * {@link #GeneratorAdapter(int, MethodVisitor, int, String, String)}
 * version.
 *
 * @param access
 *            access flags of the adapted method.
 * @param method
 *            the adapted method.
 * @param signature
 *            the signature of the adapted method (may be <tt>null</tt>).
 * @param exceptions
 *            the exceptions thrown by the adapted method (may be
 *            <tt>null</tt>).
 * @param cv
 *            the class visitor to which this adapter delegates calls.
 */
public GeneratorAdapter(final int access, final Method method,
        final String signature, final Type[] exceptions,
        final ClassVisitor cv) {
    this(access, method, cv
            .visitMethod(access, method.getName(), method.getDescriptor(),
                    signature, getInternalNames(exceptions)));
}