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Java implementation of the raml parser
/*
* Copyright (c) MuleSoft, Inc.
* Copyright 2009-2010 Igor Polevoy
*
* 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.raml.parser.utils;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.StringTokenizer;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Inflector
{
private static List singulars, plurals, irregulars;
private static List uncountables;
static
{
singulars = new ArrayList();
plurals = new ArrayList();
irregulars = new ArrayList();
uncountables = new ArrayList();
addPlural("$", "s");
addPlural("s$", "s");
addPlural("(ax|test)is$", "$1es");
addPlural("(octop|vir)us$", "$1i");
addPlural("(alias|status)$", "$1es");
addPlural("(bu)s$", "$1ses");
addPlural("(buffal|tomat)o$", "$1oes");
addPlural("([ti])um$", "$1a");
addPlural("sis$", "ses");
addPlural("(?:([^f])fe|([lr])f)$", "$1$2ves");
addPlural("(hive)$", "$1s");
addPlural("([^aeiouy]|qu)y$", "$1ies");
addPlural("(x|ch|ss|sh)$", "$1es");
addPlural("(matr|vert|ind)(?:ix|ex)$", "$1ices");
addPlural("([m|l])ouse$", "$1ice");
addPlural("^(ox)$", "$1en");
addPlural("(quiz)$", "$1zes");
addSingular("s$", "");
addSingular("(n)ews$", "$1ews");
addSingular("([ti])a$", "$1um");
addSingular("((a)naly|(b)a|(d)iagno|(p)arenthe|(p)rogno|(s)ynop|(t)he)ses$", "$1sis");
addSingular("(^analy)ses$", "$1sis");
addSingular("([^f])ves$", "$1fe");
addSingular("(hive)s$", "$1");
addSingular("(tive)s$", "$1");
addSingular("([lr])ves$", "$1f");
addSingular("([^aeiouy]|qu)ies$", "$1y");
addSingular("(s)eries$", "$1eries");
addSingular("(m)ovies$", "$1ovie");
addSingular("(x|ch|ss|sh)es$", "$1");
addSingular("([m|l])ice$", "$1ouse");
addSingular("(bus)es$", "$1");
addSingular("(o)es$", "$1");
addSingular("(shoe)s$", "$1");
addSingular("(cris|ax|test)es$", "$1is");
addSingular("(octop|vir)i$", "$1us");
addSingular("(alias|status)es$", "$1");
addSingular("^(ox)en", "$1");
addSingular("(vert|ind)ices$", "$1ex");
addSingular("(matr)ices$", "$1ix");
addSingular("(quiz)zes$", "$1");
addSingular("(database)s$", "$1");
addIrregular("person", "people");
addIrregular("man", "men");
addIrregular("child", "children");
addIrregular("sex", "sexes");
addIrregular("move", "moves");
addIrregular("foot", "feet");
addIrregular("tooth", "teeth");
uncountables = Arrays.asList("equipment", "information", "rice", "money", "species", "series", "fish", "sheep");
}
private static void addPlural(String rule, String replacement)
{
plurals.add(0, new String[] {rule, replacement});
}
private static void addSingular(String rule, String replacement)
{
singulars.add(0, new String[] {rule, replacement});
}
private static void addIrregular(String rule, String replacement)
{
irregulars.add(new String[] {rule, replacement});
}
/**
* Replaces a found pattern in a word and returns a transformed word.
*
* @return Replaces a found pattern in a word and returns a transformed word. Null is pattern does not match.
*/
private static String gsub(String word, String rule, String replacement)
{
Pattern pattern = Pattern.compile(rule, Pattern.CASE_INSENSITIVE);
Matcher matcher = pattern.matcher(word);
return matcher.find() ? matcher.replaceFirst(replacement) : null;
}
public static String pluralize(String word)
{
if (uncountables.contains(word))
{
return word;
}
for (String[] irregular : irregulars)
{
if (irregular[0].equalsIgnoreCase(word))
{
return irregular[1];
}
}
for (String[] pair : plurals)
{
String plural = gsub(word, pair[0], pair[1]);
if (plural != null)
{
return plural;
}
}
return word;
}
public static String singularize(String word)
{
if (uncountables.contains(word))
{
return word;
}
for (String[] irregular : irregulars)
{
if (irregular[1].equalsIgnoreCase(word))
{
return irregular[0];
}
}
for (String[] pair : singulars)
{
String singular = gsub(word, pair[0], pair[1]);
if (singular != null)
{
return singular;
}
}
return word;
}
/**
* Converts a camel case to underscore and then pluralizes.
*
* Example: "GrayDuck" is converted to "gray_ducks".
*
* @param camelCase any CamelCase phrase.
* @return pluralized version of underscored CamelCase.
*/
private static String tableize(String camelCase)
{
return pluralize(underscore(camelCase));
}
private static String underscore(String camel)
{
List upper = new ArrayList();
byte[] bytes = camel.getBytes();
for (int i = 0; i < bytes.length; i++)
{
byte b = bytes[i];
if (b < 97 || b > 122)
{
upper.add(i);
}
}
StringBuffer b = new StringBuffer(camel);
for (int i = upper.size() - 1; i >= 0; i--)
{
Integer index = upper.get(i);
if (index != 0)
{
b.insert(index, "_");
}
}
return b.toString().toLowerCase();
}
/**
* Generates a camel case version of a phrase from dash.
*
* @param dash dash version of a word to converted to camel case.
* @return camel case version of dash.
*/
public static String camelize(String dash)
{
return camelize(dash, true);
}
/**
* Generates a camel case version of a phrase from dash.
*
* @param dash dash version of a word to converted to camel case.
* @param capitalizeFirstChar set to true if first character needs to be capitalized, false if not.
* @return camel case version of dash.
*/
private static String camelize(String dash, boolean capitalizeFirstChar)
{
StringBuilder result = new StringBuilder("");
StringTokenizer st = new StringTokenizer(dash, "-");
while (st.hasMoreTokens())
{
result.append(capitalize(st.nextToken()));
}
return capitalizeFirstChar ? result.toString() : result.substring(0, 1).toLowerCase() + result.substring(1);
}
/**
* Capitalizes a word - only a first character is converted to upper case.
*
* @param word word/phrase to capitalize.
* @return same as input argument, but the first character is capitalized.
*/
public static String capitalize(String word)
{
return word.substring(0, 1).toUpperCase() + word.substring(1);
}
private static String shortName(String className)
{
return className.substring(className.lastIndexOf('.') + 1);
}
private static String getIdName(String tableName)
{
String idName = Inflector.singularize(tableName) + "_id";
return idName.toLowerCase();
}
/**
* If a table name is made of two other table names (as is typical for many to many relationships),
* this method retrieves a name of "another" table from a join table name.
* For instance, if a source table is "payer" and the target is "player_game", then the returned value
* will be "game".
*
* @param source known table name. It may or may not exist in the target table name.
* @param target this is a potential "join" table name.
* @return a name of "another" table from a join table name.
*/
private static String getOtherName(String source, String target)
{
String other;
if (target.contains(source) && !target.equals(source))
{
int start = target.indexOf(source);
other = start == 0 ? target.substring(source.length()) : target.substring(0, start);
}
else
{
return null;
}
if (other.startsWith("_"))
{
other = other.replaceFirst("_", " ");
}
if (other.endsWith("_"))
{
byte[] otherb = other.getBytes();
otherb[otherb.length - 1] = ' ';
other = new String(otherb);
}
return other.trim();
}
}
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