jdk8-mips64-public/jaxws: src/share/jaxws_classes/com/sun/tools/internal/xjc/reader/TypeUtil.java@9c07ef4934dd (annotated)

src/share/jaxws_classes/com/sun/tools/internal/xjc/reader/TypeUtil.java@9c07ef4934dd (annotated)

src/share/jaxws_classes/com/sun/tools/internal/xjc/reader/TypeUtil.java

Thu, 31 Aug 2017 15:18:52 +0800

author: aoqi
date: Thu, 31 Aug 2017 15:18:52 +0800
changeset 637: 9c07ef4934dd
parent 368: 0989ad8c0860
parent 0: 373ffda63c9a
permissions: -rw-r--r--

merge

 /*
  * Copyright (c) 1997, 2011, 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.internal.xjc.reader;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Comparator;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Set;
 import java.util.TreeSet;
 import com.sun.codemodel.internal.JClass;
 import com.sun.codemodel.internal.JCodeModel;
 import com.sun.codemodel.internal.JDefinedClass;
 import com.sun.codemodel.internal.JType;
 import com.sun.tools.internal.xjc.ErrorReceiver;
 import org.xml.sax.Locator;
 import org.xml.sax.SAXParseException;
 /**
  * Type-related utility methods.
  *
  * @author
  *    <a href="mailto:kohsuke.kawaguchi@sun.com">Kohsuke KAWAGUCHI</a>
  */
 public class TypeUtil {
     /**
      * Computes the common base type of two types.
      *
      * @param types
      *      set of {@link JType} objects.
      */
     public static JType getCommonBaseType( JCodeModel codeModel, Collection<? extends JType> types ) {
         return getCommonBaseType( codeModel, types.toArray(new JType[types.size()]) );
     }
     /**
      * Computes the common base type of types.
      *
      * TODO: this is a very interesting problem. Since one type has possibly
      * multiple base types, it's not an easy problem.
      * The current implementation is very naive.
      *
      * To make the result deterministic across differente JVMs, we have to
      * use a Set whose ordering is deterministic.
      */
     public static JType getCommonBaseType(JCodeModel codeModel, JType... t) {
         // first, eliminate duplicates.
         Set<JType> uniqueTypes = new TreeSet<JType>(typeComparator);
         for (JType type : t)
             uniqueTypes.add(type);
         // if this yields only one type. return now.
         // this is the only case where we can return a primitive type
         // from this method
         if (uniqueTypes.size() == 1)
             return uniqueTypes.iterator().next();
         // assertion failed. nullType can be used only under a very special circumstance
         assert !uniqueTypes.isEmpty();
         // the null type doesn't need to be taken into account.
         uniqueTypes.remove(codeModel.NULL);
         // box all the types and compute the intersection of all types
         Set<JClass> s = null;
         for (JType type : uniqueTypes) {
             JClass cls = type.boxify();
             if (s == null)
                 s = getAssignableTypes(cls);
             else
                 s.retainAll(getAssignableTypes(cls));
         }
         // any JClass can be casted to Object, so make sure it's always there
         s.add( codeModel.ref(Object.class));
         // refine 's' by removing "lower" types.
         // for example, if we have both java.lang.Object and
         // java.io.InputStream, then we don't want to use java.lang.Object.
         JClass[] raw = s.toArray(new JClass[s.size()]);
         s.clear();
         for (int i = 0; i < raw.length; i++) { // for each raw[i]
             int j;
             for (j = 0; j < raw.length; j++) { // see if raw[j] "includes" raw[i]
                 if (i == j)
                     continue;
                 if (raw[i].isAssignableFrom(raw[j]))
                     break; // raw[j] is derived from raw[i], hence j includes i.
             }
             if (j == raw.length)
                 // no other type inclueds raw[i]. remember this value.
                 s.add(raw[i]);
         }
         assert !s.isEmpty(); // since at least java.lang.Object has to be there
         // we now pick the candidate for the return type
         JClass result = pickOne(s);
         // finally, sometimes this method is used to compute the base type of types like
         // JAXBElement<A>, JAXBElement<B>, and JAXBElement<C>.
         // for those inputs, at this point result=JAXBElement.
         //
         // here, we'll try to figure out the parameterization
         // so that we can return JAXBElement<? extends D> instead of just "JAXBElement".
         if(result.isParameterized())
             return result;
         // for each uniqueType we store the list of base type parameterization
         List<List<JClass>> parameters = new ArrayList<List<JClass>>(uniqueTypes.size());
         int paramLen = -1;
         for (JType type : uniqueTypes) {
             JClass cls = type.boxify();
             JClass bp = cls.getBaseClass(result);
             // if there's no parameterization in the base type,
             // we won't do any better than <?>. Thus no point in trying to figure out the parameterization.
             // just return the base type.
             if(bp.equals(result))
                 return result;
             assert bp.isParameterized();
             List<JClass> tp = bp.getTypeParameters();
             parameters.add(tp);
             assert paramLen==-1 || paramLen==tp.size();
                 // since 'bp' always is a parameterized version of 'result', it should always
                 // have the same number of parameters.
             paramLen = tp.size();
         }
         List<JClass> paramResult = new ArrayList<JClass>();
         List<JClass> argList = new ArrayList<JClass>(parameters.size());
         // for each type parameter compute the common base type
         for( int i=0; i<paramLen; i++ ) {
             argList.clear();
             for (List<JClass> list : parameters)
                 argList.add(list.get(i));
             // compute the lower bound.
             JClass bound = (JClass)getCommonBaseType(codeModel,argList);
             boolean allSame = true;
             for (JClass a : argList)
                 allSame &= a.equals(bound);
             if(!allSame)
                 bound = bound.wildcard();
             paramResult.add(bound);
         }
         return result.narrow(paramResult);
     }
     private static JClass pickOne(Set<JClass> s) {
         // we may have more than one candidates at this point.
         // any user-defined generated types should have
         // precedence over system-defined existing types.
         //
         // so try to return such a type if any.
         for (JClass c : s)
             if (c instanceof JDefinedClass)
                 return c;
         // we can do more if we like. for example,
         // we can avoid types in the RI runtime.
         // but for now, just return the first one.
         return s.iterator().next();
     }
     private static Set<JClass> getAssignableTypes( JClass t ) {
         Set<JClass> r = new TreeSet<JClass>(typeComparator);
         getAssignableTypes(t,r);
         return r;
     }
     /**
      * Returns the set of all classes/interfaces that a given type
      * implements/extends, including itself.
      *
      * For example, if you pass java.io.FilterInputStream, then the returned
      * set will contain java.lang.Object, java.lang.InputStream, and
      * java.lang.FilterInputStream.
      */
     private static void getAssignableTypes( JClass t, Set<JClass> s ) {
         if(!s.add(t))
             return;
         // add its raw type
         s.add(t.erasure());
         // if this type is added for the first time,
         // recursively process the super class.
         JClass _super = t._extends();
         if(_super!=null)
             getAssignableTypes(_super,s);
         // recursively process all implemented interfaces
         Iterator<JClass> itr = t._implements();
         while(itr.hasNext())
             getAssignableTypes(itr.next(),s);
     }
     /**
      * Obtains a {@link JType} object for the string representation
      * of a type.
      */
     public static JType getType( JCodeModel codeModel,
         String typeName, ErrorReceiver errorHandler, Locator errorSource ) {
         try {
             return codeModel.parseType(typeName);
         } catch( ClassNotFoundException ee ) {
             // make it a warning
             errorHandler.warning( new SAXParseException(
                 Messages.ERR_CLASS_NOT_FOUND.format(typeName)
                 ,errorSource));
             // recover by assuming that it's a class that derives from Object
             return codeModel.directClass(typeName);
         }
     }
     /**
      * Compares {@link JType} objects by their names.
      */
     private static final Comparator<JType> typeComparator = new Comparator<JType>() {
         public int compare(JType t1, JType t2) {
             return t1.fullName().compareTo(t2.fullName());
         }
     };
 }

Mercurial > jdk8-mips64-public > jaxws / annotate

src/share/jaxws_classes/com/sun/tools/internal/xjc/reader/TypeUtil.java@9c07ef4934dd (annotated)

src/share/jaxws_classes/com/sun/tools/internal/xjc/reader/TypeUtil.java