aoqi@0: /*
aoqi@0:  * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0:  *
aoqi@0:  * This code is free software; you can redistribute it and/or modify it
aoqi@0:  * under the terms of the GNU General Public License version 2 only, as
aoqi@0:  * published by the Free Software Foundation.
aoqi@0:  *
aoqi@0:  * This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0:  * version 2 for more details (a copy is included in the LICENSE file that
aoqi@0:  * accompanied this code).
aoqi@0:  *
aoqi@0:  * You should have received a copy of the GNU General Public License version
aoqi@0:  * 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0:  *
aoqi@0:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0:  * or visit www.oracle.com if you need additional information or have any
aoqi@0:  * questions.
aoqi@0:  */
aoqi@0: 
aoqi@0: /*
aoqi@0:  * @test
aoqi@0:  * @bug     8011738
aoqi@0:  * @author  sogoel
aoqi@0:  * @summary Code translation test for Lambda expressions, method references
aoqi@0:  * @run main ByteCodeTest
aoqi@0:  */
aoqi@0: 
aoqi@0: import com.sun.tools.classfile.Attribute;
aoqi@0: import com.sun.tools.classfile.BootstrapMethods_attribute;
aoqi@0: import com.sun.tools.classfile.ClassFile;
aoqi@0: import com.sun.tools.classfile.ConstantPool;
aoqi@0: import com.sun.tools.classfile.ConstantPoolException;
aoqi@0: import com.sun.tools.classfile.ConstantPool.*;
aoqi@0: 
aoqi@0: import java.io.BufferedWriter;
aoqi@0: import java.io.File;
aoqi@0: import java.io.FileWriter;
aoqi@0: import java.io.IOException;
aoqi@0: import java.io.PrintWriter;
aoqi@0: import java.util.ArrayList;
aoqi@0: import java.util.Collections;
aoqi@0: import java.util.HashMap;
aoqi@0: import java.util.HashSet;
aoqi@0: import java.util.List;
aoqi@0: import java.util.Map;
aoqi@0: 
aoqi@0: public class ByteCodeTest {
aoqi@0: 
aoqi@0:     static boolean IS_DEBUG = false;
aoqi@0:     public static void main(String[] args) {
aoqi@0:         File classFile = null;
aoqi@0:         int err = 0;
aoqi@0:         boolean verifyResult = false;
aoqi@0:         for(TestCases tc : TestCases.values()) {
aoqi@0:             classFile = getCompiledFile(tc.name(), tc.srcCode);
aoqi@0:             if(classFile == null) { // either testFile or classFile was not created
aoqi@0:                err++;
aoqi@0:             } else {
aoqi@0:                 verifyResult = verifyClassFileAttributes(classFile, tc);
aoqi@0:                 if(!verifyResult)
aoqi@0:                     System.out.println("Bootstrap class file attributes did not match for " + tc.name());
aoqi@0:             }
aoqi@0:         }
aoqi@0:         if(err > 0)
aoqi@0:             throw new RuntimeException("Found " + err + " found");
aoqi@0:         else
aoqi@0:             System.out.println("Test passed");
aoqi@0:     }
aoqi@0: 
aoqi@0:     private static boolean verifyClassFileAttributes(File classFile, TestCases tc) {
aoqi@0:         ClassFile c = null;
aoqi@0:         try {
aoqi@0:             c = ClassFile.read(classFile);
aoqi@0:         } catch (IOException | ConstantPoolException e) {
aoqi@0:             e.printStackTrace();
aoqi@0:         }
aoqi@0:         ConstantPoolVisitor cpv = new ConstantPoolVisitor(c, c.constant_pool.size());
aoqi@0:         Map<Integer, String> hm = cpv.getBSMMap();
aoqi@0: 
aoqi@0:         List<String> expectedValList = tc.getExpectedArgValues();
aoqi@0:         expectedValList.add(tc.bsmSpecifier.specifier);
aoqi@0:         if(!(hm.values().containsAll(new HashSet<String>(expectedValList)))) {
aoqi@0:             System.out.println("Values do not match");
aoqi@0:             return false;
aoqi@0:         }
aoqi@0:         return true;
aoqi@0:     }
aoqi@0: 
aoqi@0:     private static File getCompiledFile(String fname, String srcString) {
aoqi@0:         File testFile = null, classFile = null;
aoqi@0:         boolean isTestFileCreated = true;
aoqi@0: 
aoqi@0:         try {
aoqi@0:             testFile = writeTestFile(fname+".java", srcString);
aoqi@0:         } catch(IOException ioe) {
aoqi@0:             isTestFileCreated = false;
aoqi@0:             System.err.println("fail to write" + ioe);
aoqi@0:         }
aoqi@0: 
aoqi@0:         if(isTestFileCreated) {
aoqi@0:             try {
aoqi@0:                 classFile = compile(testFile);
aoqi@0:             } catch (Error err) {
aoqi@0:                 System.err.println("fail compile. Source:\n" + srcString);
aoqi@0:                 throw err;
aoqi@0:             }
aoqi@0:         }
aoqi@0:         return classFile;
aoqi@0:     }
aoqi@0: 
aoqi@0:     static File writeTestFile(String fname, String source) throws IOException {
aoqi@0:         File f = new File(fname);
aoqi@0:           PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(f)));
aoqi@0:           out.println(source);
aoqi@0:           out.close();
aoqi@0:           return f;
aoqi@0:     }
aoqi@0: 
aoqi@0:     static File compile(File f) {
aoqi@0:         int rc = com.sun.tools.javac.Main.compile(new String[] {
aoqi@0:                 "-source", "1.8", "-g", f.getPath() });
aoqi@0:         if (rc != 0)
aoqi@0:                 throw new Error("compilation failed. rc=" + rc);
aoqi@0:             String path = f.getPath();
aoqi@0:             return new File(path.substring(0, path.length() - 5) + ".class");
aoqi@0:     }
aoqi@0: 
aoqi@0:     static void debugln(String str) {
aoqi@0:         if(IS_DEBUG)
aoqi@0:             System.out.println(str);
aoqi@0:     }
aoqi@0: 
aoqi@0:     enum BSMSpecifier {
aoqi@0:         SPECIFIER1("REF_invokeStatic java/lang/invoke/LambdaMetafactory metaFactory " +
aoqi@0:                 "(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;" +
aoqi@0:                 "Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)" +
aoqi@0:                 "Ljava/lang/invoke/CallSite;"),
aoqi@0:         SPECIFIER2("REF_invokeStatic java/lang/invoke/LambdaMetafactory altMetaFactory " +
aoqi@0:                         "(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;" +
aoqi@0:                         "[Ljava/lang/Object;)Ljava/lang/invoke/CallSite;");
aoqi@0: 
aoqi@0:         String specifier;
aoqi@0:         private BSMSpecifier(String specifier) {
aoqi@0:             this.specifier = specifier;
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     enum TestCases {
aoqi@0:         // Single line lambda expression
aoqi@0:         TC1("class TC1 {\n" +
aoqi@0:             "    public static void main(String[] args) {\n" +
aoqi@0:             "        Object o = (Runnable) () -> { System.out.println(\"hi\");};\n" +
aoqi@0:             "    }\n"+
aoqi@0:             "}", BSMSpecifier.SPECIFIER1) {
aoqi@0: 
aoqi@0:             @Override
aoqi@0:             List<String> getExpectedArgValues() {
aoqi@0:                 List<String> valList = new ArrayList<>();
aoqi@0:                 valList.add("REF_invokeInterface java/lang/Runnable run ()V");
aoqi@0:                 valList.add("REF_invokeStatic TC1 lambda$0 ()V");
aoqi@0:                 valList.add("()V");
aoqi@0:                 return valList;
aoqi@0:             }
aoqi@0:         },
aoqi@0: 
aoqi@0:         // Lambda expression in a for loop
aoqi@0:         TC2("import java.util.*;\n" +
aoqi@0:             "public class TC2 {\n" +
aoqi@0:             "    void TC2_test() {\n" +
aoqi@0:             "        List<String> list = new ArrayList<>();\n" +
aoqi@0:             "        list.add(\"A\");\n" +
aoqi@0:             "        list.add(\"B\");\n" +
aoqi@0:             "        list.stream().forEach( s -> { System.out.println(s); } );\n" +
aoqi@0:             "    }\n" +
aoqi@0:             "    public static void main(String[] args) {\n" +
aoqi@0:             "        new TC2().TC2_test();\n" +
aoqi@0:             "    }\n" +
aoqi@0:             "}", BSMSpecifier.SPECIFIER1) {
aoqi@0: 
aoqi@0:             @Override
aoqi@0:             List<String> getExpectedArgValues() {
aoqi@0:                 List<String> valList = new ArrayList<>();
aoqi@0:                 valList.add("REF_invokeInterface java/util/function/Consumer accept (Ljava/lang/Object;)V");
aoqi@0:                 valList.add("REF_invokeStatic TC2 lambda$0 (Ljava/lang/String;)V");
aoqi@0:                 valList.add("(Ljava/lang/String;)V");
aoqi@0:                 return valList;
aoqi@0:             }
aoqi@0:         },
aoqi@0: 
aoqi@0:         // Lambda initializer
aoqi@0:         TC3("class TC3 {\n" +
aoqi@0:             "    interface SAM {\n" +
aoqi@0:             "        void m(int i);\n" +
aoqi@0:             "    }\n" +
aoqi@0:             "    SAM lambda_03 = (int pos) -> { };\n" +
aoqi@0:             "}", BSMSpecifier.SPECIFIER1) {
aoqi@0: 
aoqi@0:             @Override
aoqi@0:             List<String> getExpectedArgValues() {
aoqi@0:                 List<String> valList = new ArrayList<>();
aoqi@0:                 valList.add("REF_invokeInterface TC3$SAM m (I)V");
aoqi@0:                 valList.add("REF_invokeStatic TC3 lambda$0 (I)V");
aoqi@0:                 valList.add("(I)V");
aoqi@0:                 return valList;
aoqi@0:             }
aoqi@0:         },
aoqi@0: 
aoqi@0:         // Array initializer
aoqi@0:         TC4("class TC4 {\n" +
aoqi@0:             "    interface Block<T> {\n" +
aoqi@0:             "        void m(T t);\n" +
aoqi@0:             "     }\n" +
aoqi@0:             "     void test1() {\n" +
aoqi@0:             "         Block<?>[] arr1 =  { t -> { }, t -> { } };\n" +
aoqi@0:             "     }\n" +
aoqi@0:             "}", BSMSpecifier.SPECIFIER1) {
aoqi@0: 
aoqi@0:             @Override
aoqi@0:             List<String> getExpectedArgValues() {
aoqi@0:                 List<String> valList = new ArrayList<>();
aoqi@0:                 valList.add("REF_invokeInterface TC4$Block m (Ljava/lang/Object;)V");
aoqi@0:                 valList.add("REF_invokeStatic TC4 lambda$0 (Ljava/lang/Object;)V");
aoqi@0:                 valList.add("(Ljava/lang/Object;)V");
aoqi@0:                 valList.add("REF_invokeStatic TC4 lambda$1 (Ljava/lang/Object;)V");
aoqi@0:                 return valList;
aoqi@0:             }
aoqi@0:         },
aoqi@0: 
aoqi@0:         //Lambda expression as a method arg
aoqi@0:         TC5("class TC5 {\n"+
aoqi@0:             "    interface MapFun<T,R> {  R m( T n); }\n" +
aoqi@0:             "    void meth( MapFun<String,Integer> mf ) {\n" +
aoqi@0:             "        assert( mf.m(\"four\") == 4);\n" +
aoqi@0:             "    }\n"+
aoqi@0:             "    void test(Integer i) {\n" +
aoqi@0:             "        meth(s -> { Integer len = s.length(); return len; } );\n" +
aoqi@0:             "    }\n"+
aoqi@0:             "}", BSMSpecifier.SPECIFIER1) {
aoqi@0: 
aoqi@0:             @Override
aoqi@0:             List<String> getExpectedArgValues() {
aoqi@0:                 List<String> valList = new ArrayList<>();
aoqi@0:                 valList.add("REF_invokeInterface TC5$MapFun m (Ljava/lang/Object;)Ljava/lang/Object;");
aoqi@0:                 valList.add("REF_invokeStatic TC5 lambda$0 (Ljava/lang/String;)Ljava/lang/Integer;");
aoqi@0:                 valList.add("(Ljava/lang/String;)Ljava/lang/Integer;");
aoqi@0:                 return valList;
aoqi@0:             }
aoqi@0:         },
aoqi@0: 
aoqi@0:         //Inner class of Lambda expression
aoqi@0:         TC6("class TC6 {\n" +
aoqi@0:             "    interface MapFun<T, R> {  R m( T n); }\n" +
aoqi@0:             "    MapFun<Class<?>,String> cs;\n" +
aoqi@0:             "    void test() {\n" +
aoqi@0:             "        cs = c -> {\n" +
aoqi@0:             "                 class innerClass   {\n" +
aoqi@0:             "                    Class<?> icc;\n" +
aoqi@0:             "                    innerClass(Class<?> _c) { icc = _c; }\n" +
aoqi@0:             "                    String getString() { return icc.toString(); }\n" +
aoqi@0:             "                  }\n" +
aoqi@0:             "             return new innerClass(c).getString();\n"+
aoqi@0:             "             };\n" +
aoqi@0:             "    }\n" +
aoqi@0:             "}\n", BSMSpecifier.SPECIFIER1) {
aoqi@0: 
aoqi@0:             @Override
aoqi@0:             List<String> getExpectedArgValues() {
aoqi@0:                 List<String> valList = new ArrayList<>();
aoqi@0:                 valList.add("REF_invokeInterface TC6$MapFun m (Ljava/lang/Object;)Ljava/lang/Object;");
aoqi@0:                 valList.add("REF_invokeSpecial TC6 lambda$0 (Ljava/lang/Class;)Ljava/lang/String;");
aoqi@0:                 valList.add("(Ljava/lang/Class;)Ljava/lang/String;");
aoqi@0:                 return valList;
aoqi@0:             }
aoqi@0:         },
aoqi@0: 
aoqi@0:         // Method reference
aoqi@0:         TC7("class TC7 {\n" +
aoqi@0:             "    static interface SAM {\n" +
aoqi@0:             "       void m(Integer i);\n" +
aoqi@0:             "    }\n" +
aoqi@0:             "    void m(Integer i) {}\n" +
aoqi@0:             "       SAM s = this::m;\n" +
aoqi@0:             "}\n", BSMSpecifier.SPECIFIER1) {
aoqi@0: 
aoqi@0:             @Override
aoqi@0:             List<String> getExpectedArgValues() {
aoqi@0:                 List<String> valList = new ArrayList<>();
aoqi@0:                 valList.add("REF_invokeInterface TC7$SAM m (Ljava/lang/Integer;)V");
aoqi@0:                 valList.add("REF_invokeVirtual TC7 m (Ljava/lang/Integer;)V");
aoqi@0:                 valList.add("(Ljava/lang/Integer;)V");
aoqi@0:                 return valList;
aoqi@0:             }
aoqi@0:         },
aoqi@0: 
aoqi@0:         // Constructor reference
aoqi@0:         TC8("public class TC8 {\n" +
aoqi@0:             "    static interface A {Fee<String> m();}\n" +
aoqi@0:             "    static class Fee<T> {\n" +
aoqi@0:             "        private T t;\n" +
aoqi@0:             "        public Fee() {}\n" +
aoqi@0:             "    }\n" +
aoqi@0:             "    public static void main(String[] args) {\n" +
aoqi@0:             "        A a = Fee<String>::new; \n" +
aoqi@0:             "    }\n" +
aoqi@0:             "}\n", BSMSpecifier.SPECIFIER1) {
aoqi@0: 
aoqi@0:             @Override
aoqi@0:             List<String> getExpectedArgValues() {
aoqi@0:                 List<String> valList = new ArrayList<>();
aoqi@0:                 valList.add("REF_invokeInterface TC8$A m ()LTC8$Fee;");
aoqi@0:                 valList.add("REF_newInvokeSpecial TC8$Fee <init> ()V");
aoqi@0:                 valList.add("()LTC8$Fee;");
aoqi@0:                 return valList;
aoqi@0:             }
aoqi@0:         },
aoqi@0: 
aoqi@0:         // Recursive lambda expression
aoqi@0:         TC9("class TC9 {\n" +
aoqi@0:             "    interface Recursive<T, R> { T apply(R n); };\n" +
aoqi@0:             "    Recursive<Integer,Integer> factorial;\n" +
aoqi@0:             "    void test(Integer j) {\n" +
aoqi@0:             "        factorial = i -> { return i == 0 ? 1 : i * factorial.apply( i - 1 ); };\n" +
aoqi@0:             "    }\n" +
aoqi@0:             "}\n", BSMSpecifier.SPECIFIER1) {
aoqi@0: 
aoqi@0:             @Override
aoqi@0:             List<String> getExpectedArgValues() {
aoqi@0:                 List<String> valList = new ArrayList<>();
aoqi@0:                 valList.add("REF_invokeInterface TC9$Recursive apply (Ljava/lang/Object;)Ljava/lang/Object;");
aoqi@0:                 valList.add("REF_invokeSpecial TC9 lambda$0 (Ljava/lang/Integer;)Ljava/lang/Integer;");
aoqi@0:                 valList.add("(Ljava/lang/Integer;)Ljava/lang/Integer;");
aoqi@0:                 return valList;
aoqi@0:             }
aoqi@0:         },
aoqi@0: 
aoqi@0:         //Serializable Lambda
aoqi@0:         TC10("import java.io.Serializable;\n" +
aoqi@0:               "class TC10 {\n" +
aoqi@0:               "    interface Foo { int m(); }\n" +
aoqi@0:               "    public static void main(String[] args) {\n" +
aoqi@0:               "        Foo f1 = (Foo & Serializable)() -> 3;\n" +
aoqi@0:               "    }\n" +
aoqi@0:               "}\n", BSMSpecifier.SPECIFIER2) {
aoqi@0: 
aoqi@0:             @Override
aoqi@0:             List<String> getExpectedArgValues() {
aoqi@0:                 List<String> valList = new ArrayList<>();
aoqi@0:                 valList.add("REF_invokeStatic java/lang/invoke/LambdaMetafactory altMetaFactory (Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;[Ljava/lang/Object;)Ljava/lang/invoke/CallSite;");
aoqi@0:                 valList.add("REF_invokeInterface TC10$Foo m ()I");
aoqi@0:                 valList.add("REF_invokeStatic TC10 lambda$main$3231c38a$0 ()I");
aoqi@0:                 valList.add("()I");
aoqi@0:                 valList.add("1");
aoqi@0:                 return valList;
aoqi@0:             }
aoqi@0:         };
aoqi@0: 
aoqi@0:         String srcCode;
aoqi@0:         BSMSpecifier bsmSpecifier;
aoqi@0: 
aoqi@0:         TestCases(String src, BSMSpecifier bsmSpecifier) {
aoqi@0:             this.srcCode = src;
aoqi@0:             // By default, all test cases will have bootstrap method specifier as Lambda.MetaFactory
aoqi@0:             // For serializable lambda test cases, bootstrap method specifier changed to altMetaFactory
aoqi@0:             this.bsmSpecifier = bsmSpecifier;
aoqi@0:         }
aoqi@0: 
aoqi@0:         List<String> getExpectedArgValues() {
aoqi@0:             return null;
aoqi@0:         }
aoqi@0: 
aoqi@0:         void setSrcCode(String src) {
aoqi@0:             srcCode = src;
aoqi@0:         }
aoqi@0:     }
aoqi@0: 
aoqi@0:     static class ConstantPoolVisitor implements ConstantPool.Visitor<String, Integer> {
aoqi@0:         final List<String> slist;
aoqi@0:         final ClassFile cf;
aoqi@0:         final ConstantPool cfpool;
aoqi@0:         final Map<Integer, String> bsmMap;
aoqi@0: 
aoqi@0: 
aoqi@0:         public ConstantPoolVisitor(ClassFile cf, int size) {
aoqi@0:             slist = new ArrayList<>(size);
aoqi@0:             for (int i = 0 ; i < size; i++) {
aoqi@0:                 slist.add(null);
aoqi@0:             }
aoqi@0:             this.cf = cf;
aoqi@0:             this.cfpool = cf.constant_pool;
aoqi@0:             bsmMap = readBSM();
aoqi@0:         }
aoqi@0: 
aoqi@0:         public Map<Integer, String> getBSMMap() {
aoqi@0:             return Collections.unmodifiableMap(bsmMap);
aoqi@0:         }
aoqi@0: 
aoqi@0:         public String visit(CPInfo c, int index) {
aoqi@0:             return c.accept(this, index);
aoqi@0:         }
aoqi@0: 
aoqi@0:         private Map<Integer, String> readBSM() {
aoqi@0:             BootstrapMethods_attribute bsmAttr =
aoqi@0:                     (BootstrapMethods_attribute) cf.getAttribute(Attribute.BootstrapMethods);
aoqi@0:             if (bsmAttr != null) {
aoqi@0:                 Map<Integer, String> out =
aoqi@0:                         new HashMap<>(bsmAttr.bootstrap_method_specifiers.length);
aoqi@0:                 for (BootstrapMethods_attribute.BootstrapMethodSpecifier bsms :
aoqi@0:                         bsmAttr.bootstrap_method_specifiers) {
aoqi@0:                     int index = bsms.bootstrap_method_ref;
aoqi@0:                     try {
aoqi@0:                         String value = slist.get(index);
aoqi@0:                         if (value == null) {
aoqi@0:                             value = visit(cfpool.get(index), index);
aoqi@0:                             debugln("[SG]: index " + index);
aoqi@0:                             debugln("[SG]: value " + value);
aoqi@0:                             slist.set(index, value);
aoqi@0:                             out.put(index, value);
aoqi@0:                         }
aoqi@0:                         for (int idx : bsms.bootstrap_arguments) {
aoqi@0:                             value = slist.get(idx);
aoqi@0:                             if (value == null) {
aoqi@0:                                 value = visit(cfpool.get(idx), idx);
aoqi@0:                                 debugln("[SG]: idx " + idx);
aoqi@0:                                 debugln("[SG]: value " + value);
aoqi@0:                                 slist.set(idx, value);
aoqi@0:                                 out.put(idx, value);
aoqi@0:                             }
aoqi@0:                         }
aoqi@0:                     } catch (InvalidIndex ex) {
aoqi@0:                         ex.printStackTrace();
aoqi@0:                     }
aoqi@0:                 }
aoqi@0:                 return out;
aoqi@0:             }
aoqi@0:             return new HashMap<>(0);
aoqi@0:         }
aoqi@0: 
aoqi@0:         @Override
aoqi@0:         public String visitClass(CONSTANT_Class_info c, Integer p) {
aoqi@0: 
aoqi@0:             String value = slist.get(p);
aoqi@0:             if (value == null) {
aoqi@0:                 try {
aoqi@0:                     value = visit(cfpool.get(c.name_index), c.name_index);
aoqi@0:                     slist.set(p, value);
aoqi@0:                 } catch (ConstantPoolException ex) {
aoqi@0:                     ex.printStackTrace();
aoqi@0:                 }
aoqi@0:             }
aoqi@0:             return value;
aoqi@0:         }
aoqi@0: 
aoqi@0:         @Override
aoqi@0:         public String visitDouble(CONSTANT_Double_info c, Integer p) {
aoqi@0: 
aoqi@0:             String value = slist.get(p);
aoqi@0:             if (value == null) {
aoqi@0:                 value = Double.toString(c.value);
aoqi@0:                 slist.set(p, value);
aoqi@0:             }
aoqi@0:             return value;
aoqi@0:         }
aoqi@0: 
aoqi@0:         @Override
aoqi@0:         public String visitFieldref(CONSTANT_Fieldref_info c, Integer p) {
aoqi@0: 
aoqi@0:         String value = slist.get(p);
aoqi@0:             if (value == null) {
aoqi@0:                 try {
aoqi@0:                     value = visit(cfpool.get(c.class_index), c.class_index);
aoqi@0:                     value = value.concat(" " + visit(cfpool.get(c.name_and_type_index),
aoqi@0:                                          c.name_and_type_index));
aoqi@0:                     slist.set(p, value);
aoqi@0:                 } catch (ConstantPoolException ex) {
aoqi@0:                     ex.printStackTrace();
aoqi@0:                 }
aoqi@0:             }
aoqi@0:             return value;
aoqi@0:         }
aoqi@0: 
aoqi@0:         @Override
aoqi@0:         public String visitFloat(CONSTANT_Float_info c, Integer p) {
aoqi@0: 
aoqi@0:             String value = slist.get(p);
aoqi@0:             if (value == null) {
aoqi@0:                 value = Float.toString(c.value);
aoqi@0:                 slist.set(p, value);
aoqi@0:             }
aoqi@0:             return value;
aoqi@0:         }
aoqi@0: 
aoqi@0:         @Override
aoqi@0:         public String visitInteger(CONSTANT_Integer_info cnstnt, Integer p) {
aoqi@0: 
aoqi@0:             String value = slist.get(p);
aoqi@0:             if (value == null) {
aoqi@0:                 value = Integer.toString(cnstnt.value);
aoqi@0:                 slist.set(p, value);
aoqi@0:             }
aoqi@0:             return value;
aoqi@0:         }
aoqi@0: 
aoqi@0:         @Override
aoqi@0:         public String visitInterfaceMethodref(CONSTANT_InterfaceMethodref_info c,
aoqi@0:                                               Integer p) {
aoqi@0: 
aoqi@0:             String value = slist.get(p);
aoqi@0:             if (value == null) {
aoqi@0:                 try {
aoqi@0:                     value = visit(cfpool.get(c.class_index), c.class_index);
aoqi@0:                     value = value.concat(" " +
aoqi@0:                                          visit(cfpool.get(c.name_and_type_index),
aoqi@0:                                          c.name_and_type_index));
aoqi@0:                     slist.set(p, value);
aoqi@0:                 } catch (ConstantPoolException ex) {
aoqi@0:                     ex.printStackTrace();
aoqi@0:                 }
aoqi@0:             }
aoqi@0:             return value;
aoqi@0:         }
aoqi@0: 
aoqi@0:         @Override
aoqi@0:         public String visitInvokeDynamic(CONSTANT_InvokeDynamic_info c, Integer p) {
aoqi@0: 
aoqi@0:             String value = slist.get(p);
aoqi@0:             if (value == null) {
aoqi@0:                 try {
aoqi@0:                     value = bsmMap.get(c.bootstrap_method_attr_index) + " "
aoqi@0:                             + visit(cfpool.get(c.name_and_type_index), c.name_and_type_index);
aoqi@0:                     slist.set(p, value);
aoqi@0:                 } catch (ConstantPoolException ex) {
aoqi@0:                     ex.printStackTrace();
aoqi@0:                 }
aoqi@0:             }
aoqi@0:             return value;
aoqi@0:         }
aoqi@0: 
aoqi@0:         @Override
aoqi@0:         public String visitLong(CONSTANT_Long_info c, Integer p) {
aoqi@0: 
aoqi@0:             String value = slist.get(p);
aoqi@0:             if (value == null) {
aoqi@0:                 value = Long.toString(c.value);
aoqi@0:                 slist.set(p, value);
aoqi@0:             }
aoqi@0:             return value;
aoqi@0:         }
aoqi@0: 
aoqi@0:         @Override
aoqi@0:         public String visitNameAndType(CONSTANT_NameAndType_info c, Integer p) {
aoqi@0: 
aoqi@0:             String value = slist.get(p);
aoqi@0:             if (value == null) {
aoqi@0:                 try {
aoqi@0:                     value = visit(cfpool.get(c.name_index), c.name_index);
aoqi@0:                     value = value.concat(" " +
aoqi@0:                             visit(cfpool.get(c.type_index), c.type_index));
aoqi@0:                     slist.set(p, value);
aoqi@0:                 } catch (InvalidIndex ex) {
aoqi@0:                     ex.printStackTrace();
aoqi@0:                 }
aoqi@0:             }
aoqi@0:             return value;
aoqi@0:         }
aoqi@0: 
aoqi@0:         @Override
aoqi@0:         public String visitMethodref(CONSTANT_Methodref_info c, Integer p) {
aoqi@0: 
aoqi@0:             String value = slist.get(p);
aoqi@0:             if (value == null) {
aoqi@0:                 try {
aoqi@0:                     value = visit(cfpool.get(c.class_index), c.class_index);
aoqi@0:                     value = value.concat(" " +
aoqi@0:                                          visit(cfpool.get(c.name_and_type_index),
aoqi@0:                                          c.name_and_type_index));
aoqi@0:                     slist.set(p, value);
aoqi@0:                 } catch (ConstantPoolException ex) {
aoqi@0:                     ex.printStackTrace();
aoqi@0:                 }
aoqi@0:             }
aoqi@0:             return value;
aoqi@0:         }
aoqi@0: 
aoqi@0:         @Override
aoqi@0:         public String visitMethodHandle(CONSTANT_MethodHandle_info c, Integer p) {
aoqi@0: 
aoqi@0:         String value = slist.get(p);
aoqi@0:             if (value == null) {
aoqi@0:                 try {
aoqi@0:                     value = c.reference_kind.name();
aoqi@0:                     value = value.concat(" "
aoqi@0:                             + visit(cfpool.get(c.reference_index), c.reference_index));
aoqi@0:                     slist.set(p, value);
aoqi@0:                 } catch (ConstantPoolException ex) {
aoqi@0:                     ex.printStackTrace();
aoqi@0:                 }
aoqi@0:             }
aoqi@0:             return value;
aoqi@0:         }
aoqi@0: 
aoqi@0:         @Override
aoqi@0:         public String visitMethodType(CONSTANT_MethodType_info c, Integer p) {
aoqi@0: 
aoqi@0:             String value = slist.get(p);
aoqi@0:             if (value == null) {
aoqi@0:                 try {
aoqi@0:                     value = visit(cfpool.get(c.descriptor_index), c.descriptor_index);
aoqi@0:                     slist.set(p, value);
aoqi@0:                 } catch (ConstantPoolException ex) {
aoqi@0:                     ex.printStackTrace();
aoqi@0:                 }
aoqi@0:             }
aoqi@0:             return value;
aoqi@0:         }
aoqi@0: 
aoqi@0:         @Override
aoqi@0:         public String visitString(CONSTANT_String_info c, Integer p) {
aoqi@0: 
aoqi@0:             try {
aoqi@0:                 String value = slist.get(p);
aoqi@0:                 if (value == null) {
aoqi@0:                     value = c.getString();
aoqi@0:                     slist.set(p, value);
aoqi@0:                 }
aoqi@0:                 return value;
aoqi@0:             } catch (ConstantPoolException ex) {
aoqi@0:                 throw new RuntimeException("Fatal error", ex);
aoqi@0:             }
aoqi@0:         }
aoqi@0: 
aoqi@0:         @Override
aoqi@0:         public String  visitUtf8(CONSTANT_Utf8_info cnstnt, Integer p) {
aoqi@0: 
aoqi@0:             String value = slist.get(p);
aoqi@0:             if (value == null) {
aoqi@0:                 value = cnstnt.value;
aoqi@0:                 slist.set(p, value);
aoqi@0:             }
aoqi@0:             return value;
aoqi@0:         }
aoqi@0:     }
aoqi@0: }
aoqi@0: