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uniVocity's open source parsers for processing different text formats using a consistent API
/*******************************************************************************
* Copyright 2019 Univocity Software Pty Ltd
*
* 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.univocity.parsers.common.fields;
import com.univocity.parsers.annotations.*;
import java.util.*;
/**
* A utility that allows users to manually define mappings from
* attributes/methods of a given class to columns to be parsed or written.
*
* This removes the requirement of having classes annotated with {@link Parsed} or
* {@link Nested}.
*
* Mappings defined manually take precedence over annotations.
*
* @see ColumnMapping
*/
public interface ColumnMapper extends Cloneable {
/**
* Maps an attribute to a column name.
*
* @param attributeName the name of the attribute.
* Use the dot character to access attributes of nested objects,
* e.g. {@code contact.mobile} will target the attribute "mobile"
* from a Contact attribute inside a Customer class.
* @param columnName the name of the column that:
* (a) when parsing, will be read from to populate the given attribute of an object;
* (b) when writing, will receive the value of the given attribute of an object;
*/
void attributeToColumnName(String attributeName, String columnName);
/**
* Maps an attribute to a column.
*
* @param attributeName the name of the attribute.
* Use the dot character to access attributes of nested objects,
* e.g. {@code contact.mobile} will target the attribute "mobile"
* from a Contact attribute inside a Customer class.
* @param column an enumeration representing the column that:
* (a) when parsing, will be read from to populate the given attribute of an object;
* (b) when writing, will receive the value of the given attribute of an object;
*/
void attributeToColumn(String attributeName, Enum column);
/**
* Maps an attribute to a column position.
*
* @param attributeName the name of the attribute.
* Use the dot character to access attributes of nested objects,
* e.g. {@code contact.mobile} will target the attribute "mobile"
* from a Contact attribute inside a Customer class.
* @param columnIndex the position of the column that:
* (a) when parsing, will be read from to populate the given attribute of an object;
* (b) when writing, will receive the value of the given attribute of an object;
*/
void attributeToIndex(String attributeName, int columnIndex);
/**
* Maps multiple attributes to multiple column names.
*
* @param mappings a map of attribute names associated with a corresponding column name, where:
*
*
* - Each key is the name of the attribute. Use the dot character to access attributes of nested objects,
* e.g. {@code contact.mobile} will target the attribute "mobile"
* from a Contact attribute inside a Customer class.
*
* - Each value is the name of the column that:
* (a) when parsing, will be read from to populate the given attribute of an object;
* (b) when writing, will receive the value of the given attribute of an object;
*
*
*/
void attributesToColumnNames(Map mappings);
/**
* Maps multiple attributes to multiple columns.
*
* @param mappings a map of attribute names associated with a corresponding column, where:
*
*
* - Each key is the name of the attribute. Use the dot character to access attributes of nested objects,
* e.g. {@code contact.mobile} will target the attribute "mobile"
* from a Contact attribute inside a Customer class.
*
* - Each value is an enumeration representing the column that:
* (a) when parsing, will be read from to populate the given attribute of an object;
* (b) when writing, will receive the value of the given attribute of an object;
*
*
*/
void attributesToColumns(Map> mappings);
/**
* Maps multiple attributes to multiple column positions.
*
* @param mappings a map of attribute names associated with a corresponding column, where:
*
*
* - Each key is the name of the attribute. Use the dot character to access attributes of nested objects,
* e.g. {@code contact.mobile} will target the attribute "mobile"
* from a Contact attribute inside a Customer class.
*
* - Each value is an integer representing the position of the column that:
* (a) when parsing, will be read from to populate the given attribute of an object;
* (b) when writing, will receive the value of the given attribute of an object;
*
*
*/
void attributesToIndexes(Map mappings);
/**
* Maps a setter method to a column name. Use when {@link #methodToColumnName(String, String)}
* is not enough to uniquely identify the method you need (e.g. when there are
* overloaded methods with different parameter types)
*
* Used only for parsing. Will be ignored when writing.
*
* @param setterName the name of the setter method.
* Use the dot character to access methods of nested objects,
* e.g. {@code contact.mobile} will target the setter method "mobile(String)"
* from a Contact attribute inside a Customer class.
* @param parameterType the type of the parameter used in the given setter name.
* @param columnName the name of the column that when parsing, will be read from to invoke given setter method of an object
*
*/
void methodToColumnName(String setterName, Class parameterType, String columnName);
/**
* Maps a setter method to a column. Use when {@link #methodToColumnName(String, String)}
* is not enough to uniquely identify the method you need (e.g. when there are
* overloaded methods with different parameter types)
*
* Used only for parsing. Will be ignored when writing.
*
* @param setterName the name of the setter method.
* Use the dot character to access methods of nested objects,
* e.g. {@code contact.mobile} will target the setter method "mobile(String)"
* from a Contact attribute inside a Customer class.
* @param parameterType the type of the parameter used in the given setter name.
* @param column an enumeration representing the column that when parsing, will be read from to invoke given setter method of an object
*/
void methodToColumn(String setterName, Class parameterType, Enum column);
/**
* Maps a setter method to a column position. Use when {@link #methodToColumnName(String, String)}
* is not enough to uniquely identify the method you need (e.g. when there are
* overloaded methods with different parameter types)
*
* Used only for parsing. Will be ignored when writing.
*
* @param setterName the name of the setter method.
* Use the dot character to access methods of nested objects,
* e.g. {@code contact.mobile} will target the setter method "mobile(String)"
* from a Contact attribute inside a Customer class.
* @param parameterType the type of the parameter used in the given setter name.
* @param columnIndex the position of the column that when parsing, will be read from to invoke given setter method of an object
*/
void methodToIndex(String setterName, Class parameterType, int columnIndex);
/**
* Maps a method to a column name.
*
* When parsing, only "setter" methods will be used i.e. the given method accepts one parameter.
* If the method is overridden, use {@link #methodToColumnName(String, Class, String)}
* to specify the exact parameter type to match the appropriate setter method.
*
* When writing, only "getter" methods will be used i.e. the given method
* doesn't accept any parameters and returns a value.
*
* @param methodName the name of the method.
* Use the dot character to access methods of nested objects,
* e.g. {@code contact.mobile} will target the method "mobile(String)" when parsing, or "String mobile()" when writing,
* from a Contact attribute inside a Customer class.
* @param columnName the name of the column that:
* (a) when parsing, will be read from to invoke given setter method of an object;
* (b) when writing, will receive the value returned by the given getter method of an object;
*
*/
void methodToColumnName(String methodName, String columnName);
/**
* Maps a method to a column.
*
* When parsing, only "setter" methods will be used i.e. the given method accepts one parameter.
* If the method is overridden, use {@link #methodToColumnName(String, Class, String)}
* to specify the exact parameter type to match the appropriate setter method.
*
* When writing, only "getter" methods will be used i.e. the given method
* doesn't accept any parameters and returns a value.
*
* @param methodName the name of the method.
* Use the dot character to access methods of nested objects,
* * e.g. {@code contact.mobile} will target the method "mobile(String)" when parsing, or "String mobile()" when writing,
* * from a Contact attribute inside a Customer class.
* @param column an enumeration representing the column that:
* (a) when parsing, will be read from to invoke given setter method of an object;
* (b) when writing, will receive the value returned by the given getter method of an object;
*
*/
void methodToColumn(String methodName, Enum column);
/**
* Maps a method to a column position.
*
* When parsing, only "setter" methods will be used i.e. the given method accepts one parameter.
* If the method is overridden, use {@link #methodToColumnName(String, Class, String)}
* to specify the exact parameter type to match the appropriate setter method.
*
* When writing, only "getter" methods will be used i.e. the given method
* doesn't accept any parameters and returns a value.
*
* @param methodName the name of the method.
* Use the dot character to access methods of nested objects,
* * e.g. {@code contact.mobile} will target the method "mobile(String)" when parsing, or "String mobile()" when writing,
* * from a Contact attribute inside a Customer class.
* @param columnIndex the position of the column that:
* (a) when parsing, will be read from to invoke given setter method of an object;
* (b) when writing, will receive the value returned by the given getter method of an object;
*
*/
void methodToIndex(String methodName, int columnIndex);
/**
* Maps multiple methods to multiple column names.
*
* @param mappings a map of methods names associated with a corresponding column name, where:
*
*
* - Each key is the name of a method. Use the dot character to access attributes of nested objects,
* e.g. {@code contact.mobile} will target the method "mobile(String)" when parsing, or "String mobile()" when writing,
* from a Contact attribute inside a Customer class.
*
* - Each value is the name of the column that:
* (a) when parsing, will be read from to invoke given setter method of an object;
* (b) when writing, will receive the value returned by the given getter method of an object;
*
*
*/
void methodsToColumnNames(Map mappings);
/**
* Maps multiple methods to multiple columns.
*
* @param mappings a map of methods names associated with a corresponding column, where:
*
*
* - Each key is the name of a method. Use the dot character to access attributes of nested objects,
* e.g. {@code contact.mobile} will target the method "mobile(String)" when parsing, or "String mobile()" when writing,
* from a Contact attribute inside a Customer class.
*
* - Each value is an enumeration representing the column that:
* (a) when parsing, will be read from to invoke given setter method of an object;
* (b) when writing, will receive the value returned by the given getter method of an object;
*
*
*/
void methodsToColumns(Map> mappings);
/**
* Maps multiple methods to multiple column positions.
*
* @param mappings a map of methods names associated with a corresponding column position, where:
*
*
* - Each key is the name of a method. Use the dot character to access attributes of nested objects,
* e.g. {@code contact.mobile} will target the method "mobile(String)" when parsing, or "String mobile()" when writing,
* from a Contact attribute inside a Customer class.
*
* - Each value is an integer representing the position of the column that:
* (a) when parsing, will be read from to invoke given setter method of an object;
* (b) when writing, will receive the value returned by the given getter method of an object;
*
*
*/
void methodsToIndexes(Map mappings);
/**
* Creates a deep copy of this object with all its mappings. Changes to the clone won't affect the original instance.
* @return a clone of the current mappings.
*/
ColumnMapper clone();
/**
* Removes any mappings that target a given method or attribute name.
* @param methodOrAttributeName the name of the method or attribute to be removed.
*/
void remove(String methodOrAttributeName);
}
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