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/**
* 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 org.apache.metamodel.csv;
import java.io.Serializable;
import java.util.List;
import org.apache.metamodel.schema.naming.ColumnNamingStrategies;
import org.apache.metamodel.schema.naming.ColumnNamingStrategy;
import org.apache.metamodel.util.BaseObject;
import org.apache.metamodel.util.FileHelper;
/**
* Represents the configuration for reading/parsing CSV files.
*/
public final class CsvConfiguration extends BaseObject implements Serializable {
private static final long serialVersionUID = 1L;
/**
* The value is '\\uFFFF', the "not a character" value which should not
* occur in any valid Unicode string. This special char can be used to
* disable either quote chars or escape chars.
*/
public static final char NOT_A_CHAR = '\uFFFF';
public static final int NO_COLUMN_NAME_LINE = 0;
public static final int DEFAULT_COLUMN_NAME_LINE = 1;
public static final char DEFAULT_SEPARATOR_CHAR = ',';
public static final char DEFAULT_QUOTE_CHAR = '"';
public static final char DEFAULT_ESCAPE_CHAR = '\\';
private final int columnNameLineNumber;
private final String encoding;
private final char separatorChar;
private final char quoteChar;
private final char escapeChar;
private final boolean failOnInconsistentRowLength;
private final boolean multilineValues;
private final ColumnNamingStrategy columnNamingStrategy;
public CsvConfiguration() {
this(DEFAULT_COLUMN_NAME_LINE);
}
public CsvConfiguration(int columnNameLineNumber) {
this(columnNameLineNumber, FileHelper.DEFAULT_ENCODING, DEFAULT_SEPARATOR_CHAR, DEFAULT_QUOTE_CHAR,
DEFAULT_ESCAPE_CHAR);
}
public CsvConfiguration(int columnNameLineNumber, boolean failOnInconsistentRowLength, boolean multilineValues) {
this(columnNameLineNumber, FileHelper.DEFAULT_ENCODING, DEFAULT_SEPARATOR_CHAR, DEFAULT_QUOTE_CHAR,
DEFAULT_ESCAPE_CHAR, failOnInconsistentRowLength, multilineValues);
}
public CsvConfiguration(int columnNameLineNumber, String encoding, char separatorChar, char quoteChar,
char escapeChar) {
this(columnNameLineNumber, encoding, separatorChar, quoteChar, escapeChar, false);
}
public CsvConfiguration(int columnNameLineNumber, String encoding, char separatorChar, char quoteChar,
char escapeChar, boolean failOnInconsistentRowLength) {
this(columnNameLineNumber, encoding, separatorChar, quoteChar, escapeChar, failOnInconsistentRowLength, true);
}
public CsvConfiguration(int columnNameLineNumber, String encoding, char separatorChar, char quoteChar,
char escapeChar, boolean failOnInconsistentRowLength, boolean multilineValues) {
this(columnNameLineNumber, null, encoding, separatorChar, quoteChar, escapeChar, failOnInconsistentRowLength,
multilineValues);
}
public CsvConfiguration(int columnNameLineNumber, ColumnNamingStrategy columnNamingStrategy, String encoding,
char separatorChar, char quoteChar, char escapeChar, boolean failOnInconsistentRowLength,
boolean multilineValues) {
this.columnNameLineNumber = columnNameLineNumber;
this.encoding = encoding;
this.separatorChar = separatorChar;
this.quoteChar = quoteChar;
this.escapeChar = escapeChar;
this.failOnInconsistentRowLength = failOnInconsistentRowLength;
this.multilineValues = multilineValues;
this.columnNamingStrategy = columnNamingStrategy;
}
/**
* Gets a {@link ColumnNamingStrategy} to use if needed.
* @return
*/
public ColumnNamingStrategy getColumnNamingStrategy() {
if (columnNamingStrategy == null) {
return ColumnNamingStrategies.defaultStrategy();
}
return columnNamingStrategy;
}
/**
* Determines whether to fail (by throwing an
* {@link InconsistentRowLengthException}) if a line in the CSV file has
* inconsistent amounts of columns.
*
* If set to false (default) MetaModel will gracefully fill in missing null
* values in or ignore additional values in a line.
*
* @return a boolean indicating whether to fail or gracefully compensate for
* inconsistent lines in the CSV files.
*/
public boolean isFailOnInconsistentRowLength() {
return failOnInconsistentRowLength;
}
/**
* Determines whether the CSV files read using this configuration should be
* allowed to have multiline values in them.
*
* @return
*/
public boolean isMultilineValues() {
return multilineValues;
}
/**
* The line number (1 based) from which to get the names of the columns.
*
* @return the line number (1 based)
*/
public int getColumnNameLineNumber() {
return columnNameLineNumber;
}
/**
* Gets the file encoding to use for reading the file.
*
* @return the text encoding of the file.
*/
public String getEncoding() {
return encoding;
}
/**
* Gets the separator char (typically comma or semicolon) for separating
* values.
*
* @return the separator char
*/
public char getSeparatorChar() {
return separatorChar;
}
/**
* Gets the quote char, used for encapsulating values.
*
* @return the quote char
*/
public char getQuoteChar() {
return quoteChar;
}
/**
* Gets the escape char, used for escaping eg. quote chars inside values.
*
* @return the escape char
*/
public char getEscapeChar() {
return escapeChar;
}
@Override
protected void decorateIdentity(List
