Examples with Injection org.pentaho.di.core.injection.Injection used on opensource projects

Example 1 with Injection

use of org.pentaho.di.core.injection.Injection in project pentaho-kettle by pentaho.

the class BeanLevelInfo method introspect.

/**
 * Introspect fields and methods of some class.
 */
protected void introspect(BeanInjectionInfo info, Field[] fields, Method[] methods, Map<String, Type> genericsInfo) {
    for (Field f : fields) {
        Injection annotationInjection = f.getAnnotation(Injection.class);
        InjectionDeep annotationInjectionDeep = f.getAnnotation(InjectionDeep.class);
        if (annotationInjection == null && annotationInjectionDeep == null) {
            // no injection annotations
            continue;
        }
        if (annotationInjection != null && annotationInjectionDeep != null) {
            // both annotations exist - wrong
            throw new RuntimeException("Field can't be annotated twice for injection " + f);
        }
        if (f.isSynthetic() || f.isEnumConstant() || Modifier.isStatic(f.getModifiers())) {
            // fields can't contain real data with such modifier
            throw new RuntimeException("Wrong modifier for anotated field " + f);
        }
        BeanLevelInfo leaf = new BeanLevelInfo();
        leaf.parent = this;
        leaf.field = f;
        Type t;
        if (f.getType().isArray()) {
            Type ff = f.getGenericType();
            leaf.dim = DIMENSION.ARRAY;
            if (ff instanceof GenericArrayType) {
                GenericArrayType ffg = (GenericArrayType) ff;
                t = resolveGenericType(ffg.getGenericComponentType(), genericsInfo);
            } else {
                t = f.getType().getComponentType();
            }
        } else if (List.class.equals(f.getType())) {
            leaf.dim = DIMENSION.LIST;
            Type fieldType = f.getGenericType();
            Type listType = ((ParameterizedType) fieldType).getActualTypeArguments()[0];
            try {
                t = resolveGenericType(listType, genericsInfo);
            } catch (Throwable ex) {
                throw new RuntimeException("Can't retrieve type from List for " + f, ex);
            }
        } else {
            leaf.dim = DIMENSION.NONE;
            t = resolveGenericType(f.getGenericType(), genericsInfo);
        }
        if (t instanceof ParameterizedType) {
            ParameterizedType pt = (ParameterizedType) t;
            leaf.leafClass = (Class<?>) pt.getRawType();
        } else {
            leaf.leafClass = (Class<?>) t;
        }
        if (annotationInjection != null) {
            try {
                leaf.converter = annotationInjection.converter().newInstance();
            } catch (Exception ex) {
                throw new RuntimeException("Error instantiate converter for " + f, ex);
            }
            leaf.convertEmpty = annotationInjection.convertEmpty();
            info.addInjectionProperty(annotationInjection, leaf);
        } else if (annotationInjectionDeep != null) {
            // introspect deeper
            leaf.prefix = annotationInjectionDeep.prefix();
            TreeMap<String, Type> gi = new TreeMap<>(genericsInfo);
            leaf.introspect(info, t, gi);
        }
    }
    for (Method m : methods) {
        Injection annotationInjection = m.getAnnotation(Injection.class);
        InjectionDeep annotationInjectionDeep = m.getAnnotation(InjectionDeep.class);
        if (annotationInjection == null && annotationInjectionDeep == null) {
            // no injection annotations
            continue;
        }
        if (annotationInjection != null && annotationInjectionDeep != null) {
            // both annotations exist - wrong
            throw new RuntimeException("Method can't be annotated twice for injection " + m);
        }
        if (m.isSynthetic() || Modifier.isStatic(m.getModifiers())) {
            // method is static
            throw new RuntimeException("Wrong modifier for anotated method " + m);
        }
        BeanLevelInfo leaf = new BeanLevelInfo();
        leaf.parent = this;
        if (annotationInjectionDeep != null) {
            Type getterClass = isGetter(m);
            if (getterClass == null) {
                throw new RuntimeException("Method should be getter: " + m);
            }
            if (m.getReturnType() != null && List.class.equals(m.getReturnType())) {
                // returns list
                leaf.dim = DIMENSION.LIST;
                ParameterizedType getterType = (ParameterizedType) getterClass;
                getterClass = getterType.getActualTypeArguments()[0];
            }
            Class<?> getter = (Class<?>) resolveGenericType(getterClass, genericsInfo);
            if (getter.isArray()) {
                throw new RuntimeException("Method should be getter: " + m);
            }
            leaf.getter = m;
            leaf.leafClass = getter;
            leaf.prefix = annotationInjectionDeep.prefix();
            leaf.init(info);
        } else {
            Class<?> setterClass = isSetter(m);
            if (setterClass == null || setterClass.isArray()) {
                throw new RuntimeException("Method should be setter: " + m);
            }
            leaf.setter = m;
            leaf.leafClass = setterClass;
            try {
                leaf.converter = annotationInjection.converter().newInstance();
            } catch (Exception ex) {
                throw new RuntimeException("Error instantiate converter for " + m, ex);
            }
            leaf.convertEmpty = annotationInjection.convertEmpty();
            info.addInjectionProperty(annotationInjection, leaf);
        }
    }
}