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.*;
016
017import java.lang.reflect.*;
018
019/**
020 * Utilities.
021 */
022public class HttpUtils {
023
024   /**
025    * Given a method name, infers the REST method name.
026    *
027    * @param m The Java method.
028    * @param detectMethod Whether we should auto-detect the HTTP method name from the Java method name.
029    * @param def The default HTTP method if not detected.
030    * @return The REST method name, or the default value if not found.
031    */
032   public static String detectHttpMethod(Method m, boolean detectMethod, String def) {
033      String n = m.getName();
034      if (detectMethod) {
035         if (n.startsWith("do") && n.length() > 2) {
036            String n2 = n.substring(2).toUpperCase();
037            if (isOneOf(n2, "GET","PUT","POST","DELETE","OPTIONS","HEAD","CONNECT","TRACE","PATCH"))
038               return n2;
039         }
040         for (String t : new String[]{"get","put","post","delete","options","head","connect","trace","patch"})
041            if (n.startsWith(t) && (n.length() == t.length() || Character.isUpperCase(n.charAt(t.length()))))
042               return t.toUpperCase();
043      }
044      return def;
045   }
046
047   /**
048    * Given a Java method, infers the REST path.
049    *
050    * @param m The Java method.
051    * @param detectMethod Whether we should auto-detect the HTTP method name from the Java method name.
052    * @return The REST path or <jk>null</jk> if not detected.
053    */
054   public static String detectHttpPath(Method m, boolean detectMethod) {
055      String n = m.getName();
056      if (detectMethod) {
057         if (n.startsWith("do") && n.length() > 2) {
058            String n2 = n.substring(2).toUpperCase();
059            if (isOneOf(n2, "GET","PUT","POST","DELETE","OPTIONS","HEAD","CONNECT","TRACE","PATCH"))
060               return "/";
061         }
062         for (String t : new String[]{"get","put","post","delete","options","head","connect","trace","patch"}) {
063            if (n.startsWith(t) && (n.length() == t.length() || Character.isUpperCase(n.charAt(t.length())))) {
064               return '/' + java.beans.Introspector.decapitalize(n.substring(t.length()));
065            }
066         }
067      }
068      return '/' + n;
069   }
070
071   /**
072    * Given a Java method, returns the arguments signature.
073    *
074    * @param m The Java method.
075    * @param full Whether fully-qualified names should be used for arguments.
076    * @return The arguments signature for the specified method.
077    */
078   public static String getMethodArgsSignature(Method m, boolean full) {
079      StringBuilder sb = new StringBuilder();
080      Class<?>[] pt = m.getParameterTypes();
081      if (pt.length == 0)
082         return "";
083      sb.append('(');
084      for (int i = 0; i < pt.length; i++) {
085         if (i > 0)
086            sb.append(',');
087         sb.append(full ? ClassUtils.getReadableClassName(pt[i]) : ClassUtils.getSimpleName(pt[i]));
088      }
089      sb.append(')');
090      return sb.toString();
091   }
092}