org.flowable.engine.impl.cmd.GetDeploymentResourceCmd Maven / Gradle / Ivy

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/* 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.flowable.engine.impl.cmd;

import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.Serializable;

import org.flowable.common.engine.api.FlowableIllegalArgumentException;
import org.flowable.common.engine.api.FlowableObjectNotFoundException;
import org.flowable.common.engine.impl.interceptor.Command;
import org.flowable.common.engine.impl.interceptor.CommandContext;
import org.flowable.engine.impl.persistence.entity.ResourceEntity;
import org.flowable.engine.impl.util.CommandContextUtil;
import org.flowable.engine.repository.Deployment;

/**
 * @author Joram Barrez
 */
public class GetDeploymentResourceCmd implements Command, Serializable {

    private static final long serialVersionUID = 1L;
    protected String deploymentId;
    protected String resourceName;

    public GetDeploymentResourceCmd(String deploymentId, String resourceName) {
        this.deploymentId = deploymentId;
        this.resourceName = resourceName;
    }

    @Override
    public InputStream execute(CommandContext commandContext) {
        if (deploymentId == null) {
            throw new FlowableIllegalArgumentException("deploymentId is null");
        }
        if (resourceName == null) {
            throw new FlowableIllegalArgumentException("resourceName is null");
        }

        ResourceEntity resource = CommandContextUtil.getResourceEntityManager().findResourceByDeploymentIdAndResourceName(deploymentId, resourceName);
        if (resource == null) {
            if (CommandContextUtil.getDeploymentEntityManager(commandContext).findById(deploymentId) == null) {
                throw new FlowableObjectNotFoundException("deployment does not exist: " + deploymentId, Deployment.class);
            } else {
                throw new FlowableObjectNotFoundException("no resource found with name '" + resourceName + "' in deployment '" + deploymentId + "'", InputStream.class);
            }
        }
        return new ByteArrayInputStream(resource.getBytes());
    }

}