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Functions for converting strings from and to various formats, such as roman numbers, alpha indices, Java identifiers, and format strings.

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package org.cthul.strings;

import org.cthul.strings.format.FormatterConfiguration;

/**
 * Helper for creating formatted exceptions.
 */
public class Exceptions {
    
    public static  T create(FormatterConfiguration c, Factory f, String msg, Object... args) {
        String m = msg(c, msg, args);
        Throwable t = t(args);
        return f.create(m, t);
    }

    protected static String msg(FormatterConfiguration c, String msg, Object[] args) {
        String m = Strings.format(c, msg, args);
        return m;
    }

    protected static Throwable t(Object[] args) {
        Throwable t = args.length > 0 && args[0] instanceof Throwable ? (Throwable) args[0] : null;
        return t;
    }
    
    public static interface Factory {
        T create(String message, Throwable cause);
    }
    
    public static final Factory RUNTIME_EXCEPTION = new Factory() {
        @Override
        public RuntimeException create(String message, Throwable cause) {
            return new RuntimeException(message, cause);
        }
    };
    
    public static final Factory ILLEGAL_ARGUMENT = new Factory() {
        @Override
        public IllegalArgumentException create(String message, Throwable cause) {
            return new IllegalArgumentException(message, cause);
        }
    };
    
    public static final Factory ILLEGAL_STATE = new Factory() {
        @Override
        public IllegalStateException create(String message, Throwable cause) {
            return new IllegalStateException(message, cause);
        }
    };
    
    public static final Factory UNSUPPORTED_OPERATION = new Factory() {
        @Override
        public UnsupportedOperationException create(String message, Throwable cause) {
            return new UnsupportedOperationException(message, cause);
        }
    };
    
}