org.activiti.cloud.services.query.rest.ProcessInstanceVariableController Maven / Gradle / Ivy

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/*
 * Copyright 2018 Alfresco, Inc. and/or its affiliates.
 *
 * 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.activiti.cloud.services.query.rest;

import com.querydsl.core.types.Predicate;
import com.querydsl.core.types.dsl.BooleanExpression;
import org.activiti.cloud.alfresco.data.domain.AlfrescoPagedResourcesAssembler;
import org.activiti.cloud.services.query.app.repository.VariableRepository;
import org.activiti.cloud.services.query.model.QVariableEntity;
import org.activiti.cloud.services.query.model.VariableEntity;
import org.activiti.cloud.services.query.resources.VariableResource;
import org.activiti.cloud.services.query.rest.assembler.VariableResourceAssembler;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.querydsl.binding.QuerydslPredicate;
import org.springframework.hateoas.MediaTypes;
import org.springframework.hateoas.PagedResources;
import org.springframework.http.MediaType;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping(
        value = "/v1/process-instances/{processInstanceId}",
        produces = {
                MediaTypes.HAL_JSON_VALUE,
                MediaType.APPLICATION_JSON_VALUE
        })
public class ProcessInstanceVariableController {

    private final VariableRepository variableRepository;

    private VariableResourceAssembler variableResourceAssembler;

    private AlfrescoPagedResourcesAssembler pagedResourcesAssembler;

    @Autowired
    public ProcessInstanceVariableController(VariableResourceAssembler variableResourceAssembler,
                                             VariableRepository variableRepository,
                                             AlfrescoPagedResourcesAssembler pagedResourcesAssembler) {
        this.variableRepository = variableRepository;
        this.variableResourceAssembler = variableResourceAssembler;
        this.pagedResourcesAssembler = pagedResourcesAssembler;
    }

    @RequestMapping(value = "/variables", method = RequestMethod.GET)
    public PagedResources getVariables(@PathVariable String processInstanceId,
                                                         @QuerydslPredicate(root = VariableEntity.class) Predicate predicate,
                                                         Pageable pageable) {

        QVariableEntity variable = QVariableEntity.variableEntity;
        BooleanExpression expression = variable.processInstanceId.eq(processInstanceId);

        Predicate extendedPredicate = expression;
        if (predicate != null) {
            extendedPredicate = expression.and(predicate);
        }

        Page variables = variableRepository.findAll(extendedPredicate,
                                                                    pageable);

        return pagedResourcesAssembler.toResource(pageable,
                                                  variables,
                                                  variableResourceAssembler);
    }
}