001// ***************************************************************************************************************************
002// * Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements.  See the NOTICE file *
003// * distributed with this work for additional information regarding copyright ownership.  The ASF licenses this file        *
004// * to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance            *
005// * with the License.  You may obtain a copy of the License at                                                              *
006// *                                                                                                                         *
007// *  http://www.apache.org/licenses/LICENSE-2.0                                                                             *
008// *                                                                                                                         *
009// * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an  *
010// * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the License for the        *
011// * specific language governing permissions and limitations under the License.                                              *
012// ***************************************************************************************************************************
013package org.apache.juneau.internal;
014
015import static org.apache.juneau.internal.StringUtils.*;
016import static org.apache.juneau.internal.ClassUtils.*;
017
018import java.lang.reflect.*;
019
020import org.apache.juneau.reflect.*;
021
022/**
023 * Utilities.
024 */
025public class HttpUtils {
026
027   /**
028    * Given a method name, infers the REST method name.
029    *
030    * @param m The Java method.
031    * @param detectMethod Whether we should auto-detect the HTTP method name from the Java method name.
032    * @param def The default HTTP method if not detected.
033    * @return The REST method name, or the default value if not found.
034    */
035   public static String detectHttpMethod(Method m, boolean detectMethod, String def) {
036      String n = m.getName();
037      if (detectMethod) {
038         if (n.startsWith("do") && n.length() > 2) {
039            String n2 = n.substring(2).toUpperCase();
040            if (isOneOf(n2, "GET","PUT","POST","DELETE","OPTIONS","HEAD","CONNECT","TRACE","PATCH"))
041               return n2;
042         }
043         for (String t : new String[]{"get","put","post","delete","options","head","connect","trace","patch"})
044            if (n.startsWith(t) && (n.length() == t.length() || Character.isUpperCase(n.charAt(t.length()))))
045               return t.toUpperCase();
046      }
047      return def;
048   }
049
050   /**
051    * Given a Java method, infers the REST path.
052    *
053    * @param m The Java method.
054    * @param detectMethod Whether we should auto-detect the HTTP method name from the Java method name.
055    * @return The REST path or <jk>null</jk> if not detected.
056    */
057   public static String detectHttpPath(Method m, boolean detectMethod) {
058      String n = m.getName();
059      if (detectMethod) {
060         if (n.startsWith("do") && n.length() > 2) {
061            String n2 = n.substring(2).toUpperCase();
062            if (isOneOf(n2, "GET","PUT","POST","DELETE","OPTIONS","HEAD","CONNECT","TRACE","PATCH"))
063               return "/";
064         }
065         for (String t : new String[]{"get","put","post","delete","options","head","connect","trace","patch"}) {
066            if (n.startsWith(t) && (n.length() == t.length() || Character.isUpperCase(n.charAt(t.length())))) {
067               return '/' + java.beans.Introspector.decapitalize(n.substring(t.length()));
068            }
069         }
070      }
071      return '/' + n;
072   }
073
074   /**
075    * Given a Java method, returns the arguments signature.
076    *
077    * @param m The Java method.
078    * @param full Whether fully-qualified names should be used for arguments.
079    * @return The arguments signature for the specified method.
080    */
081   public static String getMethodArgsSignature(Method m, boolean full) {
082      StringBuilder sb = new StringBuilder(128);
083      Class<?>[] pt = m.getParameterTypes();
084      if (pt.length == 0)
085         return "";
086      sb.append('(');
087      for (int i = 0; i < pt.length; i++) {
088         ClassInfo pti = getClassInfo(pt[i]);
089         if (i > 0)
090            sb.append(',');
091         if (full)
092            pti.appendFullName(sb);
093         else
094            pti.appendShortName(sb);
095      }
096      sb.append(')');
097      return sb.toString();
098   }
099}