jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javadoc/DocletInvoker.java@c75be5bc5283 (annotated)

src/share/classes/com/sun/tools/javadoc/DocletInvoker.java@c75be5bc5283 (annotated)

src/share/classes/com/sun/tools/javadoc/DocletInvoker.java

Tue, 09 Oct 2012 19:10:00 -0700

author: jjg
date: Tue, 09 Oct 2012 19:10:00 -0700
changeset 1357: c75be5bc5283
parent 1116: d830d28fc72e
child 1359: 25e14ad23cef
permissions: -rw-r--r--

8000663: clean up langtools imports
Reviewed-by: darcy

 /*
  * Copyright (c) 1998, 2012, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Oracle in the LICENSE file that accompanied this code.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
 package com.sun.tools.javadoc;
 import java.io.File;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.lang.reflect.Modifier;
 import java.net.URL;
 import java.net.URLClassLoader;
 import com.sun.javadoc.*;
 import com.sun.tools.javac.util.List;
 import static com.sun.javadoc.LanguageVersion.*;
 /**
  * Class creates, controls and invokes doclets.
  * @author Neal Gafter (rewrite)
  */
 public class DocletInvoker {
     private final Class<?> docletClass;
     private final String docletClassName;
     private final ClassLoader appClassLoader;
     private final Messager messager;
     private static class DocletInvokeException extends Exception {
         private static final long serialVersionUID = 0;
     }
     private String appendPath(String path1, String path2) {
         if (path1 == null || path1.length() == 0) {
             return path2 == null ? "." : path2;
         } else if (path2 == null || path2.length() == 0) {
             return path1;
         } else {
             return path1  + File.pathSeparator + path2;
         }
     }
     public DocletInvoker(Messager messager,
                          String docletClassName, String docletPath,
                          ClassLoader docletParentClassLoader) {
         this.messager = messager;
         this.docletClassName = docletClassName;
         // construct class loader
         String cpString = null;   // make sure env.class.path defaults to dot
         // do prepends to get correct ordering
         cpString = appendPath(System.getProperty("env.class.path"), cpString);
         cpString = appendPath(System.getProperty("java.class.path"), cpString);
         cpString = appendPath(docletPath, cpString);
         URL[] urls = com.sun.tools.javac.file.Locations.pathToURLs(cpString);
         if (docletParentClassLoader == null)
             appClassLoader = new URLClassLoader(urls, getDelegationClassLoader(docletClassName));
         else
             appClassLoader = new URLClassLoader(urls, docletParentClassLoader);
         // attempt to find doclet
         Class<?> dc = null;
         try {
             dc = appClassLoader.loadClass(docletClassName);
         } catch (ClassNotFoundException exc) {
             messager.error(null, "main.doclet_class_not_found", docletClassName);
             messager.exit();
         }
         docletClass = dc;
     }
     /*
      * Returns the delegation class loader to use when creating
      * appClassLoader (used to load the doclet).  The context class
      * loader is the best choice, but legacy behavior was to use the
      * default delegation class loader (aka system class loader).
      *
      * Here we favor using the context class loader.  To ensure
      * compatibility with existing apps, we revert to legacy
      * behavior if either or both of the following conditions hold:
      *
      * 1) the doclet is loadable from the system class loader but not
      *    from the context class loader,
      *
      * 2) this.getClass() is loadable from the system class loader but not
      *    from the context class loader.
      */
     private ClassLoader getDelegationClassLoader(String docletClassName) {
         ClassLoader ctxCL = Thread.currentThread().getContextClassLoader();
         ClassLoader sysCL = ClassLoader.getSystemClassLoader();
         if (sysCL == null)
             return ctxCL;
         if (ctxCL == null)
             return sysCL;
         // Condition 1.
         try {
             sysCL.loadClass(docletClassName);
             try {
                 ctxCL.loadClass(docletClassName);
             } catch (ClassNotFoundException e) {
                 return sysCL;
             }
         } catch (ClassNotFoundException e) {
         }
         // Condition 2.
         try {
             if (getClass() == sysCL.loadClass(getClass().getName())) {
                 try {
                     if (getClass() != ctxCL.loadClass(getClass().getName()))
                         return sysCL;
                 } catch (ClassNotFoundException e) {
                     return sysCL;
                 }
             }
         } catch (ClassNotFoundException e) {
         }
         return ctxCL;
     }
     /**
      * Generate documentation here.  Return true on success.
      */
     public boolean start(RootDoc root) {
         Object retVal;
         String methodName = "start";
         Class<?>[] paramTypes = { RootDoc.class };
         Object[] params = { root };
         try {
             retVal = invoke(methodName, null, paramTypes, params);
         } catch (DocletInvokeException exc) {
             return false;
         }
         if (retVal instanceof Boolean) {
             return ((Boolean)retVal).booleanValue();
         } else {
             messager.error(null, "main.must_return_boolean",
                            docletClassName, methodName);
             return false;
         }
     }
     /**
      * Check for doclet added options here. Zero return means
      * option not known.  Positive value indicates number of
      * arguments to option.  Negative value means error occurred.
      */
     public int optionLength(String option) {
         Object retVal;
         String methodName = "optionLength";
         Class<?>[] paramTypes = { String.class };
         Object[] params = { option };
         try {
             retVal = invoke(methodName, new Integer(0), paramTypes, params);
         } catch (DocletInvokeException exc) {
             return -1;
         }
         if (retVal instanceof Integer) {
             return ((Integer)retVal).intValue();
         } else {
             messager.error(null, "main.must_return_int",
                            docletClassName, methodName);
             return -1;
         }
     }
     /**
      * Let doclet check that all options are OK. Returning true means
      * options are OK.  If method does not exist, assume true.
      */
     public boolean validOptions(List<String[]> optlist) {
         Object retVal;
         String options[][] = optlist.toArray(new String[optlist.length()][]);
         String methodName = "validOptions";
         DocErrorReporter reporter = messager;
         Class<?>[] paramTypes = { String[][].class, DocErrorReporter.class };
         Object[] params = { options, reporter };
         try {
             retVal = invoke(methodName, Boolean.TRUE, paramTypes, params);
         } catch (DocletInvokeException exc) {
             return false;
         }
         if (retVal instanceof Boolean) {
             return ((Boolean)retVal).booleanValue();
         } else {
             messager.error(null, "main.must_return_boolean",
                            docletClassName, methodName);
             return false;
         }
     }
     /**
      * Return the language version supported by this doclet.
      * If the method does not exist in the doclet, assume version 1.1.
      */
     public LanguageVersion languageVersion() {
         try {
             Object retVal;
             String methodName = "languageVersion";
             Class<?>[] paramTypes = new Class<?>[0];
             Object[] params = new Object[0];
             try {
                 retVal = invoke(methodName, JAVA_1_1, paramTypes, params);
             } catch (DocletInvokeException exc) {
                 return JAVA_1_1;
             }
             if (retVal instanceof LanguageVersion) {
                 return (LanguageVersion)retVal;
             } else {
                 messager.error(null, "main.must_return_languageversion",
                                docletClassName, methodName);
                 return JAVA_1_1;
             }
         } catch (NoClassDefFoundError ex) { // for boostrapping, no Enum class.
             return null;
         }
     }
     /**
      * Utility method for calling doclet functionality
      */
     private Object invoke(String methodName, Object returnValueIfNonExistent,
                           Class<?>[] paramTypes, Object[] params)
         throws DocletInvokeException {
             Method meth;
             try {
                 meth = docletClass.getMethod(methodName, paramTypes);
             } catch (NoSuchMethodException exc) {
                 if (returnValueIfNonExistent == null) {
                     messager.error(null, "main.doclet_method_not_found",
                                    docletClassName, methodName);
                     throw new DocletInvokeException();
                 } else {
                     return returnValueIfNonExistent;
                 }
             } catch (SecurityException exc) {
                 messager.error(null, "main.doclet_method_not_accessible",
                                docletClassName, methodName);
                 throw new DocletInvokeException();
             }
             if (!Modifier.isStatic(meth.getModifiers())) {
                 messager.error(null, "main.doclet_method_must_be_static",
                                docletClassName, methodName);
                 throw new DocletInvokeException();
             }
             ClassLoader savedCCL =
                 Thread.currentThread().getContextClassLoader();
             try {
                 Thread.currentThread().setContextClassLoader(appClassLoader);
                 return meth.invoke(null , params);
             } catch (IllegalArgumentException exc) {
                 messager.error(null, "main.internal_error_exception_thrown",
                                docletClassName, methodName, exc.toString());
                 throw new DocletInvokeException();
             } catch (IllegalAccessException exc) {
                 messager.error(null, "main.doclet_method_not_accessible",
                                docletClassName, methodName);
                 throw new DocletInvokeException();
             } catch (NullPointerException exc) {
                 messager.error(null, "main.internal_error_exception_thrown",
                                docletClassName, methodName, exc.toString());
                 throw new DocletInvokeException();
             } catch (InvocationTargetException exc) {
                 Throwable err = exc.getTargetException();
                 if (err instanceof java.lang.OutOfMemoryError) {
                     messager.error(null, "main.out.of.memory");
                 } else {
                 messager.error(null, "main.exception_thrown",
                                docletClassName, methodName, exc.toString());
                     exc.getTargetException().printStackTrace();
                 }
                 throw new DocletInvokeException();
             } finally {
                 Thread.currentThread().setContextClassLoader(savedCCL);
             }
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

src/share/classes/com/sun/tools/javadoc/DocletInvoker.java@c75be5bc5283 (annotated)

src/share/classes/com/sun/tools/javadoc/DocletInvoker.java