// 
// Decompiled by Procyon v0.6.0
// 

package com.google.common.flogger.util;

public class Checks
{
    private Checks() {
    }
    
    public static <T> T checkNotNull(final T value, final String name) {
        if (value == null) {
            throw new NullPointerException(name + " must not be null");
        }
        return value;
    }
    
    public static void checkArgument(final boolean condition, final String message) {
        if (!condition) {
            throw new IllegalArgumentException(message);
        }
    }
    
    public static void checkState(final boolean condition, final String message) {
        if (!condition) {
            throw new IllegalStateException(message);
        }
    }
    
    public static String checkMetadataIdentifier(final String s) {
        if (s.isEmpty()) {
            throw new IllegalArgumentException("identifier must not be empty");
        }
        if (!isLetter(s.charAt(0))) {
            throw new IllegalArgumentException("identifier must start with an ASCII letter: " + s);
        }
        for (int n = 1; n < s.length(); ++n) {
            final char c = s.charAt(n);
            if (!isLetter(c) && (c < '0' || c > '9') && c != '_') {
                throw new IllegalArgumentException("identifier must contain only ASCII letters, digits or underscore: " + s);
            }
        }
        return s;
    }
    
    private static boolean isLetter(final char c) {
        return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z');
    }
}