Examples with MethodVisitor org.eclipse.persistence.internal.libraries.asm.MethodVisitor used on opensource projects

Example 1 with MethodVisitor

use of org.eclipse.persistence.internal.libraries.asm.MethodVisitor in project eclipselink by eclipse-ee4j.

the class MetadataDynamicClassWriter method addMethods.

/**
 * Add get methods for all virtual attributes
 */
@Override
protected void addMethods(ClassWriter cw, String parentClassType) {
    for (MappingAccessor accessor : getDescriptor().getMappingAccessors()) {
        String propertyName = propertyName(accessor.getAttributeName());
        Type returnType = getAsmType(accessor);
        // Add getter
        MethodVisitor mv = cw.visitMethod(ACC_PUBLIC, GET + propertyName, "()" + returnType.getDescriptor(), null, new String[] { DYNAMIC_EXCEPTION });
        mv.visitCode();
        mv.visitVarInsn(ALOAD, 0);
        mv.visitLdcInsn(accessor.getAttributeName());
        mv.visitMethodInsn(INVOKESPECIAL, parentClassType, "get", "(" + LJAVA_LANG_STRING + ")" + LJAVA_LANG_OBJECT, false);
        mv.visitTypeInsn(CHECKCAST, returnType.getInternalName());
        mv.visitInsn(ARETURN);
        mv.visitMaxs(2, 1);
        mv.visitEnd();
        // Add setter
        mv = cw.visitMethod(ACC_PUBLIC, SET + propertyName, "(" + returnType.getDescriptor() + ")V", null, new String[] { DYNAMIC_EXCEPTION });
        mv.visitCode();
        mv.visitVarInsn(ALOAD, 0);
        mv.visitLdcInsn("id");
        mv.visitVarInsn(ALOAD, 1);
        mv.visitMethodInsn(INVOKESPECIAL, parentClassType, SET, "(" + LJAVA_LANG_STRING + LJAVA_LANG_OBJECT + ")" + LDYNAMIC_ENTITY, false);
        mv.visitInsn(POP);
        mv.visitInsn(RETURN);
        mv.visitMaxs(3, 2);
        mv.visitEnd();
    }
}

Example 2 with MethodVisitor

use of org.eclipse.persistence.internal.libraries.asm.MethodVisitor in project eclipselink by eclipse-ee4j.

the class ClassWeaver method addPropertyChange.

/**
 * Add a method to track property changes. The method will look as follows:
 *
 * public void _toplink_propertyChange(String s, Object obj, Object obj1){
 * if(_persistence_listener != null {@literal &&} obj != obj1){
 * _persistence_listener.propertyChange(new PropertyChangeEvent(this, s,
 * obj, obj1)); } }
 */
public void addPropertyChange(ClassDetails classDetails) {
    // create the _toplink_propertyChange() method
    MethodVisitor cv_addPC = cv.visitMethod(ACC_PUBLIC, "_persistence_propertyChange", "(Ljava/lang/String;Ljava/lang/Object;Ljava/lang/Object;)V", null, null);
    // if (_toplink_Listener != null)
    cv_addPC.visitVarInsn(ALOAD, 0);
    cv_addPC.visitFieldInsn(GETFIELD, classDetails.getClassName(), "_persistence_listener", PCL_SIGNATURE);
    Label l0 = new Label();
    cv_addPC.visitJumpInsn(IFNULL, l0);
    // if (obj != obj1)
    cv_addPC.visitVarInsn(ALOAD, 2);
    cv_addPC.visitVarInsn(ALOAD, 3);
    cv_addPC.visitJumpInsn(IF_ACMPEQ, l0);
    // _toplink_listener.propertyChange(...);
    cv_addPC.visitVarInsn(ALOAD, 0);
    cv_addPC.visitFieldInsn(GETFIELD, classDetails.getClassName(), "_persistence_listener", PCL_SIGNATURE);
    cv_addPC.visitTypeInsn(NEW, PCE_SHORT_SIGNATURE);
    cv_addPC.visitInsn(DUP);
    // new PropertyChangeEvent(this, s, obj, obj1)
    cv_addPC.visitVarInsn(ALOAD, 0);
    cv_addPC.visitVarInsn(ALOAD, 1);
    cv_addPC.visitVarInsn(ALOAD, 2);
    cv_addPC.visitVarInsn(ALOAD, 3);
    cv_addPC.visitMethodInsn(INVOKESPECIAL, PCE_SHORT_SIGNATURE, "<init>", "(Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;Ljava/lang/Object;)V", false);
    cv_addPC.visitMethodInsn(INVOKEINTERFACE, PCL_SHORT_SIGNATURE, "propertyChange", "(" + PCE_SIGNATURE + ")V", true);
    // }
    cv_addPC.visitLabel(l0);
    cv_addPC.visitInsn(RETURN);
    cv_addPC.visitMaxs(0, 0);
}

Example 3 with MethodVisitor

use of org.eclipse.persistence.internal.libraries.asm.MethodVisitor in project eclipselink by eclipse-ee4j.

the class ClassWeaver method addFetchGroupMethods.

/**
 * Adds get/set method for FetchGroupTracker interface. This adds the
 * following methods:
 *
 * public Session _persistence_getSession() { return _persistence_session; }
 * public void _persistence_setSession(Session session) {
 * this._persistence_session = session; }
 *
 * public FetchGroup _persistence_getFetchGroup() { return
 * _persistence_fetchGroup; } public void
 * _persistence_setFetchGroup(FetchGroup fetchGroup) {
 * this._persistence_fetchGroup = fetchGroup; }
 *
 * public boolean _persistence_shouldRefreshFetchGroup() { return
 * _persistence_shouldRefreshFetchGroup; } public void
 * _persistence_setShouldRefreshFetchGroup(boolean shouldRefreshFetchGroup)
 * { this._persistence_shouldRefreshFetchGroup = shouldRefreshFetchGroup; }
 *
 * public void _persistence_resetFetchGroup() { }
 *
 * public void _persistence_isAttributeFetched(String attribute) { return
 * this._persistence_fetchGroup == null ||
 * _persistence_fetchGroup.containsAttribute(attribute); }
 *
 * public void _persistence_checkFetched(String attribute) { if
 * (this._persistence_fetchGroup != null) {
 * EntityManagerImpl.processUnfetchedAttribute(this, attribute); } }
 *
 * public void _persistence_checkSetFetched(String attribute) { if
 * (this._persistence_fetchGroup != null) {
 * EntityManagerImpl.processUnfetchedAttributeForSet(this, attribute); } }
 */
public void addFetchGroupMethods(ClassDetails classDetails) {
    MethodVisitor cv_getSession = cv.visitMethod(ACC_PUBLIC, "_persistence_getSession", "()" + SESSION_SIGNATURE, null, null);
    cv_getSession.visitVarInsn(ALOAD, 0);
    cv_getSession.visitFieldInsn(GETFIELD, classDetails.getClassName(), "_persistence_session", SESSION_SIGNATURE);
    cv_getSession.visitInsn(ARETURN);
    cv_getSession.visitMaxs(0, 0);
    MethodVisitor cv_setSession = cv.visitMethod(ACC_PUBLIC, "_persistence_setSession", "(" + SESSION_SIGNATURE + ")V", null, null);
    cv_setSession.visitVarInsn(ALOAD, 0);
    cv_setSession.visitVarInsn(ALOAD, 1);
    cv_setSession.visitFieldInsn(PUTFIELD, classDetails.getClassName(), "_persistence_session", SESSION_SIGNATURE);
    cv_setSession.visitInsn(RETURN);
    cv_setSession.visitMaxs(0, 0);
    MethodVisitor cv_getFetchGroup = cv.visitMethod(ACC_PUBLIC, "_persistence_getFetchGroup", "()" + FETCHGROUP_SIGNATURE, null, null);
    cv_getFetchGroup.visitVarInsn(ALOAD, 0);
    cv_getFetchGroup.visitFieldInsn(GETFIELD, classDetails.getClassName(), "_persistence_fetchGroup", FETCHGROUP_SIGNATURE);
    cv_getFetchGroup.visitInsn(ARETURN);
    cv_getFetchGroup.visitMaxs(0, 0);
    MethodVisitor cv_setFetchGroup = cv.visitMethod(ACC_PUBLIC, "_persistence_setFetchGroup", "(" + FETCHGROUP_SIGNATURE + ")V", null, null);
    cv_setFetchGroup.visitVarInsn(ALOAD, 0);
    cv_setFetchGroup.visitVarInsn(ALOAD, 1);
    cv_setFetchGroup.visitFieldInsn(PUTFIELD, classDetails.getClassName(), "_persistence_fetchGroup", FETCHGROUP_SIGNATURE);
    cv_setFetchGroup.visitInsn(RETURN);
    cv_setFetchGroup.visitMaxs(0, 0);
    MethodVisitor cv_shouldRefreshFetchGroup = cv.visitMethod(ACC_PUBLIC, "_persistence_shouldRefreshFetchGroup", "()" + PBOOLEAN_SIGNATURE, null, null);
    cv_shouldRefreshFetchGroup.visitVarInsn(ALOAD, 0);
    cv_shouldRefreshFetchGroup.visitFieldInsn(GETFIELD, classDetails.getClassName(), "_persistence_shouldRefreshFetchGroup", PBOOLEAN_SIGNATURE);
    cv_shouldRefreshFetchGroup.visitInsn(IRETURN);
    cv_shouldRefreshFetchGroup.visitMaxs(0, 0);
    MethodVisitor cv_setShouldRefreshFetchGroup = cv.visitMethod(ACC_PUBLIC, "_persistence_setShouldRefreshFetchGroup", "(" + PBOOLEAN_SIGNATURE + ")V", null, null);
    cv_setShouldRefreshFetchGroup.visitVarInsn(ALOAD, 0);
    cv_setShouldRefreshFetchGroup.visitVarInsn(ILOAD, 1);
    cv_setShouldRefreshFetchGroup.visitFieldInsn(PUTFIELD, classDetails.getClassName(), "_persistence_shouldRefreshFetchGroup", PBOOLEAN_SIGNATURE);
    cv_setShouldRefreshFetchGroup.visitInsn(RETURN);
    cv_setShouldRefreshFetchGroup.visitMaxs(0, 0);
    MethodVisitor cv_resetFetchGroup = cv.visitMethod(ACC_PUBLIC, "_persistence_resetFetchGroup", "()V", null, null);
    cv_resetFetchGroup.visitInsn(RETURN);
    cv_resetFetchGroup.visitMaxs(0, 0);
    MethodVisitor cv_isAttributeFetched = cv.visitMethod(ACC_PUBLIC, "_persistence_isAttributeFetched", "(Ljava/lang/String;)Z", null, null);
    cv_isAttributeFetched.visitVarInsn(ALOAD, 0);
    cv_isAttributeFetched.visitFieldInsn(GETFIELD, classDetails.getClassName(), "_persistence_fetchGroup", FETCHGROUP_SIGNATURE);
    Label gotoTrue = new Label();
    cv_isAttributeFetched.visitJumpInsn(IFNULL, gotoTrue);
    cv_isAttributeFetched.visitVarInsn(ALOAD, 0);
    cv_isAttributeFetched.visitFieldInsn(GETFIELD, classDetails.getClassName(), "_persistence_fetchGroup", FETCHGROUP_SIGNATURE);
    cv_isAttributeFetched.visitVarInsn(ALOAD, 1);
    cv_isAttributeFetched.visitMethodInsn(INVOKEVIRTUAL, FETCHGROUP_SHORT_SIGNATURE, "containsAttributeInternal", "(Ljava/lang/String;)Z", false);
    Label gotoFalse = new Label();
    cv_isAttributeFetched.visitJumpInsn(IFEQ, gotoFalse);
    cv_isAttributeFetched.visitLabel(gotoTrue);
    cv_isAttributeFetched.visitInsn(ICONST_1);
    Label gotoReturn = new Label();
    cv_isAttributeFetched.visitJumpInsn(GOTO, gotoReturn);
    cv_isAttributeFetched.visitLabel(gotoFalse);
    cv_isAttributeFetched.visitInsn(ICONST_0);
    cv_isAttributeFetched.visitLabel(gotoReturn);
    cv_isAttributeFetched.visitInsn(IRETURN);
    cv_isAttributeFetched.visitMaxs(0, 0);
    MethodVisitor cv_checkFetched = cv.visitMethod(ACC_PUBLIC, "_persistence_checkFetched", "(Ljava/lang/String;)V", null, null);
    cv_checkFetched.visitVarInsn(ALOAD, 0);
    cv_checkFetched.visitVarInsn(ALOAD, 1);
    cv_checkFetched.visitMethodInsn(INVOKEVIRTUAL, classDetails.getClassName(), "_persistence_isAttributeFetched", "(Ljava/lang/String;)Z", false);
    gotoReturn = new Label();
    cv_checkFetched.visitJumpInsn(IFNE, gotoReturn);
    cv_checkFetched.visitVarInsn(ALOAD, 0);
    cv_checkFetched.visitTypeInsn(CHECKCAST, FETCHGROUP_TRACKER_SHORT_SIGNATURE);
    cv_checkFetched.visitVarInsn(ALOAD, 1);
    cv_checkFetched.visitMethodInsn(INVOKESTATIC, ENTITY_MANAGER_IMPL_SHORT_SIGNATURE, "processUnfetchedAttribute", "(" + FETCHGROUP_TRACKER_SIGNATURE + "Ljava/lang/String;)V", false);
    cv_checkFetched.visitLabel(gotoReturn);
    cv_checkFetched.visitInsn(RETURN);
    cv_checkFetched.visitMaxs(0, 0);
    MethodVisitor cv_checkFetchedForSet = cv.visitMethod(ACC_PUBLIC, "_persistence_checkFetchedForSet", "(Ljava/lang/String;)V", null, null);
    cv_checkFetchedForSet.visitVarInsn(ALOAD, 0);
    cv_checkFetchedForSet.visitVarInsn(ALOAD, 1);
    cv_checkFetchedForSet.visitMethodInsn(INVOKEVIRTUAL, classDetails.getClassName(), "_persistence_isAttributeFetched", "(Ljava/lang/String;)Z", false);
    gotoReturn = new Label();
    cv_checkFetchedForSet.visitJumpInsn(IFNE, gotoReturn);
    cv_checkFetchedForSet.visitVarInsn(ALOAD, 0);
    cv_checkFetchedForSet.visitTypeInsn(CHECKCAST, FETCHGROUP_TRACKER_SHORT_SIGNATURE);
    cv_checkFetchedForSet.visitVarInsn(ALOAD, 1);
    cv_checkFetchedForSet.visitMethodInsn(INVOKESTATIC, ENTITY_MANAGER_IMPL_SHORT_SIGNATURE, "processUnfetchedAttributeForSet", "(" + FETCHGROUP_TRACKER_SIGNATURE + "Ljava/lang/String;)V", false);
    cv_checkFetchedForSet.visitLabel(gotoReturn);
    cv_checkFetchedForSet.visitInsn(RETURN);
    cv_checkFetchedForSet.visitMaxs(0, 0);
}

Example 4 with MethodVisitor

use of org.eclipse.persistence.internal.libraries.asm.MethodVisitor in project eclipselink by eclipse-ee4j.

the class ClassWeaver method addGetterMethodForFieldAccess.

/**
 * Adds a convenience method used to replace a GETFIELD when field access is
 * used. The method follows the following form:
 *
 * public (VariableClass) _persistence_get_variableName() {
 * _persistence_checkFetched("variableName");
 * _persistence_initialize_variableName_vh(); this.variableName =
 * ((VariableClass))_persistence_variableName_vh.getValue(); return
 * this.variableName; }
 */
public void addGetterMethodForFieldAccess(ClassDetails classDetails, AttributeDetails attributeDetails) {
    String attribute = attributeDetails.getAttributeName();
    // create the _persistenc_getvariableName method
    MethodVisitor cv_get = cv.visitMethod(ACC_PUBLIC, PERSISTENCE_GET + attribute, "()" + attributeDetails.getReferenceClassType().getDescriptor(), null, null);
    if (classDetails.shouldWeaveFetchGroups()) {
        cv_get.visitVarInsn(ALOAD, 0);
        cv_get.visitLdcInsn(attribute);
        // _persistence_checkFetched("variableName");
        cv_get.visitMethodInsn(INVOKEVIRTUAL, classDetails.getClassName(), "_persistence_checkFetched", "(Ljava/lang/String;)V", false);
    }
    if (attributeDetails.weaveValueHolders()) {
        // _persistence_initialize_variableName_vh();
        cv_get.visitVarInsn(ALOAD, 0);
        cv_get.visitMethodInsn(INVOKEVIRTUAL, classDetails.getClassName(), "_persistence_initialize_" + attributeDetails.getAttributeName() + PERSISTENCE_FIELDNAME_POSTFIX, "()V", false);
        // _persistenc_variableName_vh.getValue();
        cv_get.visitVarInsn(ALOAD, 0);
        cv_get.visitVarInsn(ALOAD, 0);
        cv_get.visitFieldInsn(GETFIELD, classDetails.getClassName(), PERSISTENCE_FIELDNAME_PREFIX + attribute + PERSISTENCE_FIELDNAME_POSTFIX, ClassWeaver.VHI_SIGNATURE);
        cv_get.visitMethodInsn(INVOKEINTERFACE, ClassWeaver.VHI_SHORT_SIGNATURE, "getValue", "()Ljava/lang/Object;", true);
        // Add the cast:
        // (<VariableClass>)_persistenc_variableName_vh.getValue()
        cv_get.visitTypeInsn(CHECKCAST, attributeDetails.getReferenceClassName().replace('.', '/'));
        // add the assignment: this.variableName =
        // (<VariableClass>)_persistenc_variableName_vh.getValue();
        cv_get.visitFieldInsn(PUTFIELD, classDetails.getClassName(), attribute, attributeDetails.getReferenceClassType().getDescriptor());
    }
    // return this.variableName;
    cv_get.visitVarInsn(ALOAD, 0);
    cv_get.visitFieldInsn(GETFIELD, classDetails.getClassName(), attribute, attributeDetails.getReferenceClassType().getDescriptor());
    // Get the opcode for the return insturction. This may be different
    // depending on the type.
    int opcode = attributeDetails.getReferenceClassType().getOpcode(IRETURN);
    cv_get.visitInsn(opcode);
    cv_get.visitMaxs(0, 0);
}

Example 5 with MethodVisitor

use of org.eclipse.persistence.internal.libraries.asm.MethodVisitor in project eclipselink by eclipse-ee4j.

the class ClassWeaver method addGetPropertyChangeListener.

/**
 * Add the implementation of the changeTracker_getPropertyChangeListener
 * method to the class. The result is a method that looks as follows:
 *
 * public PropertyChangeListener _persistence_getPropertyChangeListener() {
 * return _persistence_listener; }
 */
public void addGetPropertyChangeListener(ClassDetails classDetails) {
    MethodVisitor cv_getPCL = cv.visitMethod(ACC_PUBLIC, "_persistence_getPropertyChangeListener", "()" + PCL_SIGNATURE, null, null);
    cv_getPCL.visitVarInsn(ALOAD, 0);
    cv_getPCL.visitFieldInsn(GETFIELD, classDetails.getClassName(), "_persistence_listener", PCL_SIGNATURE);
    cv_getPCL.visitInsn(ARETURN);
    cv_getPCL.visitMaxs(0, 0);
}