| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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.epam.datalab.module; |
| |
| import com.epam.datalab.core.AdapterBase; |
| import com.epam.datalab.core.parser.CommonFormat; |
| import com.epam.datalab.exceptions.AdapterException; |
| import com.epam.datalab.model.aws.ReportLine; |
| import com.fasterxml.jackson.annotation.JsonClassDescription; |
| import com.fasterxml.jackson.annotation.JsonIgnore; |
| import com.fasterxml.jackson.annotation.JsonProperty; |
| import com.fasterxml.jackson.annotation.JsonTypeName; |
| import com.google.common.base.MoreObjects.ToStringHelper; |
| import org.bson.Document; |
| |
| import javax.validation.constraints.NotNull; |
| import java.io.BufferedReader; |
| import java.io.BufferedWriter; |
| import java.io.FileReader; |
| import java.io.FileWriter; |
| import java.io.IOException; |
| import java.util.List; |
| |
| /** |
| * The adapter for file system. |
| */ |
| @JsonTypeName(ModuleName.ADAPTER_FILE) |
| @JsonClassDescription( |
| "File adapter.\n" + |
| "Read source or write converted data to the file.\n" + |
| " - type: " + ModuleName.ADAPTER_FILE + "\n" + |
| " [writeHeader: <true | false>] - write header of data to the adapterOut.\n" + |
| " file: <filename> - the name of file." |
| ) |
| public class AdapterFile extends AdapterBase { |
| |
| /** |
| * The name of file. |
| */ |
| @NotNull |
| @JsonProperty |
| private String file; |
| /** |
| * Reader for adapter. |
| */ |
| @JsonIgnore |
| private BufferedReader reader; |
| /** |
| * Writer for adapter. |
| */ |
| @JsonIgnore |
| private BufferedWriter writer; |
| |
| /** |
| * Return the name of file. |
| */ |
| public String getFile() { |
| return file; |
| } |
| |
| /** |
| * Set the name of file. |
| */ |
| public void setFile(String file) { |
| this.file = file; |
| } |
| |
| @Override |
| public void open() throws AdapterException { |
| try { |
| if (getMode() == Mode.READ) { |
| reader = new BufferedReader(new FileReader(file)); |
| } else if (getMode() == Mode.WRITE) { |
| writer = new BufferedWriter(new FileWriter(file)); |
| } else { |
| throw new AdapterException("Mode of adapter unknown or not defined. Set mode to " + Mode.READ + " or " + Mode.WRITE + "."); |
| } |
| } catch (Exception e) { |
| throw new AdapterException("Cannot open file " + file + ". " + e.getLocalizedMessage(), e); |
| } |
| } |
| |
| @Override |
| public void close() throws AdapterException { |
| if (reader != null) { |
| try { |
| reader.close(); |
| } catch (IOException e) { |
| throw new AdapterException("Cannot close file " + file + ". " + e.getLocalizedMessage(), e); |
| } finally { |
| reader = null; |
| } |
| } |
| |
| if (writer != null) { |
| try { |
| writer.close(); |
| } catch (IOException e) { |
| throw new AdapterException("Cannot close file " + file + ". " + e.getLocalizedMessage(), e); |
| } finally { |
| writer = null; |
| } |
| } |
| } |
| |
| @Override |
| public String getEntryName() { |
| return getFile(); |
| } |
| |
| @Override |
| public String readLine() throws AdapterException { |
| try { |
| return reader.readLine(); |
| } catch (IOException e) { |
| throw new AdapterException("Cannot read file " + file + ". " + e.getLocalizedMessage(), e); |
| } |
| } |
| |
| @Override |
| public void writeHeader(List<String> header) throws AdapterException { |
| try { |
| writer.write(CommonFormat.rowToString(header)); |
| writer.write(System.lineSeparator()); |
| } catch (IOException e) { |
| throw new AdapterException("Cannot write file " + file + ". " + e.getLocalizedMessage(), e); |
| } |
| } |
| |
| @Override |
| public Document writeRow(ReportLine row) throws AdapterException { |
| try { |
| writer.write(CommonFormat.rowToString(row)); |
| writer.write(System.lineSeparator()); |
| } catch (IOException e) { |
| throw new AdapterException("Cannot write file " + file + ". " + e.getLocalizedMessage(), e); |
| } |
| return null; |
| } |
| |
| |
| @Override |
| public ToStringHelper toStringHelper(Object self) { |
| return super.toStringHelper(self) |
| .add("file", file); |
| } |
| } |