com.abubusoft.kripton.processor.sqlite.SelectBeanHelper Maven / Gradle / Ivy

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/**
 * Copyright 2015, 2017 Francesco Benincasa ([email protected]).
 * 
 * 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.abubusoft.kripton.processor.sqlite;

import com.abubusoft.kripton.common.SQLTypeAdapterUtils;
import com.abubusoft.kripton.processor.core.ImmutableUtility;
import com.abubusoft.kripton.processor.sqlite.grammars.jql.JQLProjection;
import com.abubusoft.kripton.processor.sqlite.model.SQLProperty;
import com.abubusoft.kripton.processor.sqlite.model.SQLiteEntity;
import com.abubusoft.kripton.processor.sqlite.model.SQLiteModelMethod;
import com.abubusoft.kripton.processor.sqlite.transform.SQLTransformer;
import com.squareup.javapoet.MethodSpec;
import com.squareup.javapoet.TypeName;
import com.squareup.javapoet.TypeSpec;

import java.util.Optional;
import java.util.Set;

import static com.abubusoft.kripton.processor.core.reflect.TypeUtility.typeName;

/**
 * The Class SelectBeanHelper.
 *
 * @author Francesco Benincasa ([email protected])
 * @since 17/mag/2016
 */
public class SelectBeanHelper extends AbstractSelectCodeGenerator {

  /*
   * (non-Javadoc)
   *
   * @see com.abubusoft.kripton.processor.sqlite.AbstractSelectCodeGenerator#generateSpecializedPart(com.abubusoft.kripton.processor.sqlite.model.SQLiteModelMethod,
   * com.squareup.javapoet.TypeSpec.Builder, com.squareup.javapoet.MethodSpec.Builder, java.util.Set, boolean)
   */
  @Override
  public void generateSpecializedPart(SQLiteModelMethod method, TypeSpec.Builder classBuilder,
                                      MethodSpec.Builder methodBuilder, Set fieldList, boolean mapFields) {
    SQLiteEntity entity = method.getEntity();

    // List fields = fieldList.value1;

    // TypeName collectionClass;
    TypeName entityClass = typeName(entity.getElement());

    methodBuilder.addCode("\n");
    methodBuilder.addCode("$T resultBean=null;\n", entityClass);
    // immutable management
    if (entity.isImmutablePojo()) {
      methodBuilder.addCode("\n");
      methodBuilder.addComment("initialize temporary variable for immutable POJO");
      ImmutableUtility.generateImmutableVariableInit(entity, methodBuilder);
    }

    methodBuilder.addCode("\n");

    methodBuilder.beginControlFlow("if (_cursor.moveToFirst())");

    // generate index from columns
    methodBuilder.addCode("\n");
    {
      int i = 0;
      for (JQLProjection a : fieldList) {
        SQLProperty item = a.property;
        methodBuilder.addStatement("int index$L=_cursor.getColumnIndex($S)", (i++), item.columnName);
        if (item.hasTypeAdapter()) {
          methodBuilder.addStatement("$T $LAdapter=$T.getAdapter($T.class)",
                  item.typeAdapter.getAdapterTypeName(), item.getName(), SQLTypeAdapterUtils.class,
                  item.typeAdapter.getAdapterTypeName());
        }
      }
    }
    methodBuilder.addCode("\n");

    // immutable management
    if (entity.isImmutablePojo()) {
      methodBuilder.addComment("reset temporary variable for immutable POJO");
      ImmutableUtility.generateImmutableVariableReset(entity, methodBuilder);
    } else {
      methodBuilder.addCode("resultBean=new $T();\n\n", entityClass);
    }

    // generate mapping
    int i = 0;
    for (JQLProjection a : fieldList) {
      SQLProperty item = a.property;
      if (item.isNullable()) {
        methodBuilder.addCode("if (!_cursor.isNull(index$L)) { ", i);
      }
      SQLTransformer.cursor2Java(method.getParent().getEntity(), methodBuilder, entityClass, item, "resultBean", "_cursor", "index" + i + "");
      methodBuilder.addCode(";");
      if (item.isNullable()) {
        methodBuilder.addCode(" }");
      }
      methodBuilder.addCode("\n");

      i++;
    }

    // subqueries are executed after all
    generateSubQueries(methodBuilder, method);

    methodBuilder.addCode("\n");

    // immutable management
    if (entity.isImmutablePojo()) {
      methodBuilder.addComment("define immutable POJO");
      ImmutableUtility.generateImmutableEntityCreation(entity, methodBuilder, "resultBean", false);
    }

    methodBuilder.endControlFlow();

    if (method.hasOptionalResult()) {
      methodBuilder.addCode("return $T.ofNullable(resultBean);\n", Optional.class);
    } else {
      methodBuilder.addCode("return resultBean;\n");
    }
    // close try { open cursor
    methodBuilder.endControlFlow();

  }

}