com.wavemaker.runtime.data.interceptors.WMEntityInterceptor Maven / Gradle / Ivy

Go to download
/*******************************************************************************
 * Copyright (C) 2022-2023 WaveMaker, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/
package com.wavemaker.runtime.data.interceptors;

import java.beans.PropertyDescriptor;
import java.io.Serializable;
import java.lang.reflect.InvocationTargetException;
import java.util.Collection;
import java.util.Map;

import org.hibernate.EmptyInterceptor;
import org.hibernate.type.Type;

import com.wavemaker.commons.MessageResource;
import com.wavemaker.commons.WMRuntimeException;
import com.wavemaker.runtime.commons.variable.Scope;
import com.wavemaker.runtime.data.replacers.EntityValueReplacer;
import com.wavemaker.runtime.data.replacers.ListenerContext;

/**
 * @author Dilip Kumar
 * @since 20/6/16
 */
public class WMEntityInterceptor extends EmptyInterceptor {

    private InterceptorContext context;

    public WMEntityInterceptor() {
        this.context = new InterceptorContext();
    }

    @Override
    public void onDelete(
        final Object entity, final Serializable id, final Object[] state, final String[] propertyNames,
        final Type[] types) {
//        final EntityValueReplacer valueOverrider = getEntityValueOverrider(entity.getClass());
//        valueOverrider.apply(new ListenerContext(entity, Scope.DELETE));
    }

    @Override
    public boolean onFlushDirty(
        final Object entity, final Serializable id, final Object[] currentState, final Object[] previousState,
        final String[] propertyNames,
        final Type[] types) {
        final EntityValueReplacer valueReplacer = context.getEntityValueOverrider(entity.getClass());
        final boolean applied = valueReplacer.apply(new ListenerContext(entity, Scope.UPDATE));
        if (applied) {
            updateState(entity, currentState, propertyNames, valueReplacer.getPropertyDescriptorMap());
        }

        return applied;
    }

    @Override
    public boolean onLoad(
        final Object entity, final Serializable id, final Object[] state, final String[] propertyNames,
        final Type[] types) {
        final EntityValueReplacer valueReplacer = context.getEntityValueOverrider(entity.getClass());
        final Map descriptorMap = valueReplacer.getPropertyDescriptorMap();
        try {
            for (int i = 0; i < propertyNames.length; i++) {
                final String propertyName = propertyNames[i];
                final PropertyDescriptor descriptor = descriptorMap.get(propertyName);
                if (descriptor != null && descriptor.getWriteMethod() != null) {
                    descriptor.getWriteMethod().invoke(entity, state[i]);
                }
            }
        } catch (IllegalAccessException | InvocationTargetException e) {
            throw new WMRuntimeException(MessageResource.create("com.wavemaker.runtime.error.while.loading.entity"), e);
        }

        final boolean applied = valueReplacer.apply(new ListenerContext(entity, Scope.READ));
        if (applied) {
            updateState(entity, state, propertyNames, descriptorMap);
        }
        return applied;
    }

    @Override
    public boolean onSave(
        final Object entity, final Serializable id, final Object[] state, final String[] propertyNames,
        final Type[] types) {
        final EntityValueReplacer valueReplacer = context.getEntityValueOverrider(entity.getClass());
        final boolean applied = valueReplacer.apply(new ListenerContext(entity, Scope.INSERT));
        if (applied) {
            updateState(entity, state, propertyNames, valueReplacer.getPropertyDescriptorMap());
        }
        return applied;
    }

    private void updateState(
        Object entity, Object[] state, String[] propertyNames, Map
        descriptorMap) {
        try {
            for (int i = 0; i < propertyNames.length; i++) {
                final PropertyDescriptor descriptor = descriptorMap.get(propertyNames[i]);
                if (descriptor != null && descriptor.getReadMethod() != null &&
                    isNotCollectionType(descriptor)) {
                    final Object value = descriptor.getReadMethod().invoke(entity);
                    state[i] = value;
                }
            }
        } catch (IllegalAccessException | InvocationTargetException e) {
            throw new WMRuntimeException(MessageResource.create("com.wavemaker.runtime.state.parameters.update.error"),
                e);
        }
    }

    private boolean isNotCollectionType(final PropertyDescriptor descriptor) {
        return !Collection.class.isAssignableFrom(descriptor.getPropertyType()) &&
            !Map.class.isAssignableFrom(descriptor.getPropertyType());
    }
}