com.github.talberto.easybeans.atg.RepositoryBeansExtractor.java Source code

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Here is the source code for com.github.talberto.easybeans.atg.RepositoryBeansExtractor.java

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/**
 * Copyright 2014 Tomas Rodriguez 
 * 
 * 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.github.talberto.easybeans.atg;

import java.util.List;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import atg.beans.DynamicPropertyDescriptor;
import atg.repository.Repository;
import atg.repository.RepositoryException;
import atg.repository.RepositoryItemDescriptor;

import com.github.talberto.easybeans.api.MappingException;
import com.github.talberto.easybeans.gen.MetaBean;
import com.github.talberto.easybeans.gen.MetaProperty;
import com.github.talberto.easybeans.gen.MetaType;
import com.google.common.base.Function;
import com.google.common.base.Joiner;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Lists;
import com.google.common.reflect.TypeToken;

public class RepositoryBeansExtractor {
    protected Logger mLog = LoggerFactory.getLogger(this.getClass());

    public List<MetaBean> extractBeans(Repository pRepo, List<String> pBeanNames) {
        mLog.info("Extracting beans [{}] from repository [{}]", Joiner.on(",").join(pBeanNames), pRepo.toString());
        List<MetaBean> extractedBeans = Lists.newLinkedList();

        for (String beanName : pBeanNames) {
            try {
                RepositoryItemDescriptor descriptor = pRepo.getItemDescriptor(beanName);

                if (descriptor == null) {
                    throw new IllegalArgumentException(
                            String.format("Doesn't exist an item descriptor named [%s]", beanName));
                }

                List<MetaProperty> properties = extractProperties(descriptor);
                extractedBeans.add(new MetaBean(beanName, properties));
            } catch (RepositoryException e) {
                throw new MappingException(e);
            }
        }

        return extractedBeans;
    }

    private List<MetaProperty> extractProperties(RepositoryItemDescriptor pItemDescriptor) {
        List<DynamicPropertyDescriptor> propertyDescriptors = ImmutableList
                .copyOf(pItemDescriptor.getPropertyDescriptors());
        List<MetaProperty> properties = Lists.transform(propertyDescriptors,
                new Function<DynamicPropertyDescriptor, MetaProperty>() {
                    @Override
                    public MetaProperty apply(DynamicPropertyDescriptor pPropDesc) {
                        return extractProperty(pPropDesc);
                    }
                });

        return ImmutableList.copyOf(properties);
    }

    private MetaProperty extractProperty(DynamicPropertyDescriptor pPropDesc) {
        String name = pPropDesc.getName();
        Class<?> type = pPropDesc.getPropertyType();

        MetaType metaType = MetaType.of(TypeToken.of(type));
        MetaProperty property = new MetaProperty(name, metaType);

        mLog.debug("Extracted property [{}]", property);

        return property;
    }
}