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/*
 * Copyright 2008-2013 the original author or authors.
 *
 * 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 org.broadleafcommerce.openadmin.server.service;

import org.apache.commons.collections.MapUtils;
import org.apache.commons.lang.StringEscapeUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.broadleafcommerce.common.exception.ServiceException;
import org.broadleafcommerce.common.security.service.CleanStringException;
import org.broadleafcommerce.common.security.service.ExploitProtectionService;
import org.broadleafcommerce.openadmin.dto.BatchDynamicResultSet;
import org.broadleafcommerce.openadmin.dto.BatchPersistencePackage;
import org.broadleafcommerce.openadmin.dto.CriteriaTransferObject;
import org.broadleafcommerce.openadmin.dto.DynamicResultSet;
import org.broadleafcommerce.openadmin.dto.Entity;
import org.broadleafcommerce.openadmin.dto.PersistencePackage;
import org.broadleafcommerce.openadmin.dto.Property;
import org.broadleafcommerce.openadmin.server.service.persistence.PersistenceManager;
import org.broadleafcommerce.openadmin.server.service.persistence.TargetModeType;
import org.codehaus.jackson.map.util.LRUMap;
import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.lang.reflect.Constructor;
import java.util.Map;

import javax.annotation.Resource;
/**
 * @author jfischer
 */
@Service("blDynamicEntityRemoteService")
public class DynamicEntityRemoteService implements DynamicEntityService, DynamicEntityRemote, ApplicationContextAware {

    public static final String DEFAULTPERSISTENCEMANAGERREF = "blPersistenceManager";
    private static final Log LOG = LogFactory.getLog(DynamicEntityRemoteService.class);
    protected static final Map METADATA_CACHE = MapUtils.synchronizedMap(new LRUMap(100, 1000));

    protected String persistenceManagerRef = DEFAULTPERSISTENCEMANAGERREF;
    private ApplicationContext applicationContext;

    @Resource(name="blExploitProtectionService")
    protected ExploitProtectionService exploitProtectionService;

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        this.applicationContext = applicationContext;
    }

    protected ServiceException recreateSpecificServiceException(ServiceException e, String message, Throwable cause) {
        try {
            ServiceException newException;
            if (cause == null) {
                Constructor constructor = e.getClass().getConstructor(String.class);
                newException = (ServiceException) constructor.newInstance(message);
            } else {
                Constructor constructor = e.getClass().getConstructor(String.class, Throwable.class);
                newException = (ServiceException) constructor.newInstance(message, cause);
            }

            return newException;
        } catch (Exception e1) {
            throw new RuntimeException(e1);
        }
    }

    @Override
    public DynamicResultSet inspect(PersistencePackage persistencePackage) throws ServiceException {
        String ceilingEntityFullyQualifiedClassname = persistencePackage.getCeilingEntityFullyQualifiedClassname();
        try {
            PersistenceManager persistenceManager = (PersistenceManager) applicationContext.getBean(persistenceManagerRef);
            persistenceManager.setTargetMode(TargetModeType.SANDBOX);
            return persistenceManager.inspect(persistencePackage);
        } catch (ServiceException e) {
            String message = exploitProtectionService.cleanString(e.getMessage());
            throw recreateSpecificServiceException(e, message, e.getCause());
        } catch (Exception e) {
            LOG.error("Problem inspecting results for " + ceilingEntityFullyQualifiedClassname, e);
            throw new ServiceException(exploitProtectionService.cleanString("Unable to fetch results for " + ceilingEntityFullyQualifiedClassname), e);
        }
    }

    @Override
    public DynamicResultSet fetch(PersistencePackage persistencePackage, CriteriaTransferObject cto) throws ServiceException {
        try {
            PersistenceManager persistenceManager = (PersistenceManager) applicationContext.getBean(persistenceManagerRef);
            persistenceManager.setTargetMode(TargetModeType.SANDBOX);
            return persistenceManager.fetch(persistencePackage, cto);
        } catch (ServiceException e) {
            LOG.error("Problem fetching results for " + persistencePackage.getCeilingEntityFullyQualifiedClassname(), e);
            String message = exploitProtectionService.cleanString(e.getMessage());
            throw recreateSpecificServiceException(e, message, e.getCause());
        }
    }

    protected void cleanEntity(Entity entity) throws ServiceException {
        Property currentProperty = null;
        try {
            for (Property property : entity.getProperties()) {
                currentProperty = property;
                property.setRawValue(property.getValue());
                property.setValue(exploitProtectionService.cleanStringWithResults(property.getValue()));
                property.setUnHtmlEncodedValue(StringEscapeUtils.unescapeHtml(property.getValue()));
            }
        } catch (CleanStringException e) {
            StringBuilder sb = new StringBuilder();
            for (int j=0;j