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Java example source code file (TestNewCastArray.java)

This example Java source code file (TestNewCastArray.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

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Java - Java tags/keywords

annotation, code_attribute, field, hello, integer, method, retention, string, target, test1, test3a, type_use, util

The TestNewCastArray.java Java example source code

/*
 * Copyright (c) 2013, 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.
 *
 * 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.
 */

/*
 * @test
 * @bug 8005681
 * @summary Repeated annotations on new,array,cast.
 */
import java.lang.annotation.*;
import java.io.*;
import java.util.List;
import com.sun.tools.classfile.*;

import java.lang.annotation.*;
import static java.lang.annotation.RetentionPolicy.*;
import static java.lang.annotation.ElementType.*;

public class TestNewCastArray {
    int errors = 0;
    List<String> failedTests = new java.util.LinkedList<>();

    // 'b' tests fail with only even numbers of annotations (8005681).
    String[] testclasses = {"Test1",
        "Test2a", "Test3a", "Test4a", "Test5a",
        "Test2b", "Test3b", "Test4b", "Test5b"
    };

    public static void main(String[] args) throws Exception {
        new TestNewCastArray().run();
    }

    void check(String testcase, int expected, int actual) {
        String res = testcase + ": (expected) " + expected + ", " + actual + " (actual): ";
        if(expected == actual) {
            res = res.concat("PASS");
        } else {
            errors++;
            res = res.concat("FAIL");
            failedTests.add(res);
        }
        System.out.println(res);
    }

    void report() {
        if(errors!=0) {
            System.err.println("Failed tests: " + errors +
                                   "\nfailed test cases:\n");
            for(String t: failedTests)
                System.err.println("  " + t);
           throw new RuntimeException("FAIL: There were test failures.");
           } else
            System.out.println("PASS");
    }

    void test(String clazz, String ttype, ClassFile cf, Method m, Field f,
              String name, boolean codeattr) {
        int actual = 0;
        int expected = 0, cexpected = 0;
        int index = 0;
        String memberName = null;
        Attribute attr = null;
        Code_attribute cAttr = null;
        String testcase = "undefined";
        try {
        switch(ttype) {
            case "METHOD":
                index = m.attributes.getIndex(cf.constant_pool, name);
                memberName = m.getName(cf.constant_pool);
                if(index != -1)
                    attr = m.attributes.get(index);
                break;
            case "MCODE":
                memberName = m.getName(cf.constant_pool);
                //fetch index of and code attribute and annotations from code attribute.
                index = m.attributes.getIndex(cf.constant_pool, Attribute.Code);
                if(index!= -1) {
                    attr = m.attributes.get(index);
                    assert attr instanceof Code_attribute;
                    cAttr = (Code_attribute)attr;
                    index = cAttr.attributes.getIndex(cf.constant_pool, name);
                    if(index!= -1)
                        attr = cAttr.attributes.get(index);
                }
                break;
            case "FIELD":
                index = f.attributes.getIndex(cf.constant_pool, name);
                memberName = f.getName(cf.constant_pool);
                if(index != -1)
                    attr = f.attributes.get(index);
                break;
            case "CODE":
                memberName = f.getName(cf.constant_pool);
                //fetch index of and code attribute and annotations from code attribute.
                index = cf.attributes.getIndex(cf.constant_pool, Attribute.Code);
                if(index!= -1) {
                    attr = cf.attributes.get(index);
                    assert attr instanceof Code_attribute;
                    cAttr = (Code_attribute)attr;
                    index = cAttr.attributes.getIndex(cf.constant_pool, name);
                    if(index!= -1)
                        attr = cAttr.attributes.get(index);
                }
                break;
            default:
                break;
        }
        } catch(ConstantPoolException cpe) { cpe.printStackTrace(); }
        testcase = clazz+" "+ttype + ": " + memberName + ", " + name;
        if(index != -1) {
            //count RuntimeTypeAnnotations
            assert attr instanceof RuntimeTypeAnnotations_attribute;
            RuntimeTypeAnnotations_attribute tAttr =
                    (RuntimeTypeAnnotations_attribute)attr;
                actual += tAttr.annotations.length;
        }
        if(memberName.compareTo("<init>")==0) memberName=clazz+memberName;
        switch ( memberName ) {
            //METHOD:
            case "Test1<init>": expected=0; break;
            case "testr22_22": expected=4; break;
            case "testr11_11": expected=4; break;
            case "testr12_21": expected=4; break;
            case "testr20_02": expected=2; break;

            case "Test2a<init>": cexpected=0; break;
            case "test00_00_11_11": cexpected=4; break;
            case "test21_12_21_12": cexpected=8; break;
            case "test_new1": cexpected=2; break;
            case "test_new2": cexpected=2; break;
            case "test_cast1": cexpected=2; break;
            case "test_cast2": cexpected=2; break;

            case "Test2b<init>": cexpected=0; break;
            case "test20_02_20_02": cexpected=4; break;
            case "test22_22_22_22": cexpected=8; break;
            case "test_new3": cexpected=1; break;
            case "test_new4": cexpected=1; break;
            case "test_new5": cexpected=2; break;
            case "test_cast3": cexpected=1; break;
            case "test_cast4": cexpected=2; break;

            case "Test3a<init>": cexpected=10; break;
            case "SA_21_12c": cexpected = 0; break;
            case "SA_01_10c": expected = 0; break;
            case "SA_11_11c": expected = 0; break;

            case "Test3b<init>": cexpected=6; break;
            case "SA_22_22c": cexpected = 0; break;
            case "SA_20_02c": cexpected = 0; break;

            case "Test3c<init>": cexpected=8; break;
            case "SA_10_10": cexpected = 0; break;
            case "SA_10_01": cexpected = 0; break;
            case "SA_21_12": cexpected = 0; break;

            case "Test3d<init>": cexpected=6; break;
            case "SA_20_02": cexpected = 0; break;
            case "SA_22_22": cexpected = 0; break;

            case "Test4a<init>": cexpected=4; break;
            case "nS_21": cexpected = 0; break;
            case "nS_12": cexpected = 0; break;

            case "Test4b<init>": cexpected=4; break;
            case "nS20":  cexpected = 0; break;
            case "nS02":  cexpected = 0; break;
            case "nS22":  cexpected = 0; break;

            case "Test5a<init>": cexpected=4; break;
            case "ci11": expected = 0; break;
            case "ci21": expected = 0; break;

            case "Test5b<init>": cexpected=3; break;
            case "ci2":  expected = 0; break;
            case "ci22": expected = 0; break;

            default: expected = 0; break;
        }
        if(codeattr)
            check(testcase, cexpected, actual);
        else
            check(testcase, expected, actual);
    }

    public void run() {
        ClassFile cf = null;
        InputStream in = null;
        for( String clazz : testclasses) {
            String testclazz = "TestNewCastArray$" + clazz + ".class";
            System.out.println("Testing " + testclazz);
            try {
                in = getClass().getResource(testclazz).openStream();
                cf = ClassFile.read(in);
                in.close();
            } catch(Exception e) { e.printStackTrace();  }

            if(clazz.startsWith("Test1")) {
                for (Field f: cf.fields)
                    test(clazz, "FIELD", cf, null, f, Attribute.RuntimeVisibleTypeAnnotations, false);
                for (Method m: cf.methods)
                    test(clazz, "METHOD", cf, m, null, Attribute.RuntimeVisibleTypeAnnotations, false);
            } else {
                for (Field f: cf.fields)
                    test(clazz, "CODE", cf, null, f, Attribute.RuntimeVisibleTypeAnnotations, true);
                for (Method m: cf.methods)
                    test(clazz, "MCODE", cf, m, null, Attribute.RuntimeVisibleTypeAnnotations, true);
            }
        }
        report();
    }

    //////// test class //////////////////////////
    // "Test1" not in code attribute.
    // on arrays on and in method return
    static class Test1 {
        Test1(){}
        // OK expect 5, got 5
        String @A @A @B @B[] @A @A @B @B [] testr22_22(Test1 this, String param, String ... vararg) {
            String [][] sarray = new String [2][2];
            return sarray;
        }
        // OK expect 5, got 5
        String @A @B [] @A @B [] testr11_11(Test1 this, String param, String ... vararg) {
            String [][] sarray = new String [2][2];
            return sarray;
        }
        // OK expect 5, got 5
        String @A @B @B []@B @B @A[] testr12_21(Test1 this, String param, String ... vararg) {
            String [][] sarray = new String [2][2];
            return sarray;
        }
        // OK expect 3, got 3
        String @A @A [] @B @B [] testr20_02(Test1 this, String param, String ... vararg) {
            String [][] sarray = new String [2][2];
            return sarray;
        }
    }

    // Inside method body (in method's code attribute)
    static class Test2a {
        Test2a(){}
        Object o = new Integer(1);
        // expect 4
        String[][] test00_00_11_11(Test2a this, String param, String ... vararg) {
            String [] [] sarray = new String @A @B[2] @A @B [2];
            return sarray;
        }

        // expect 8
        String[][] test21_12_21_12(Test2a this, String param, String ... vararg) {
            String @A @A @B [] @A @B @B [] sarray = new String @A @A @B[2] @A @B @B [2];
            return sarray;
        }

        void test_new1() { String nS_21 = new @A @A @B String("Hello");   }
        void test_new2() { String nS_12 = new @A @B @B String("Hello");   }
        void test_cast1() { String tcs11 = (@A @B String)o;      }
        void test_cast2() { String tcs21 = (@A @A @B String)o;   }
    }

    static class Test2b {
        Test2b(){}
        Object o = new Integer(1);
        // expect 4
        String[][] test20_02_20_02(Test2b this, String param, String ... vararg) {
            String @A @A [] @B @B [] sarray = new String @A @A[2] @B @B [2];
            return sarray;
        }

        // expect 8
        String[][] test22_22_22_22(Test2b this, String param, String ... vararg) {
            String @A @A @B @B [] @A @A @B @B [] sarray = new String @A @A @B @B [2] @A @A @B @B [2];
            return sarray;
        }

        void test_new3() { String nS20 = new @A @A String("Hello");       }
        void test_new4() { String nS02 = new @B @B String("Hello");       }
        void test_new5() { String nS22 = new @A @A @B @B String("Hello"); }
        void test_cast3() { String tcs2 =  (@A @A String)o;      }
        void test_cast4() { String tcs22 = (@A @A @B @B String)o;}
    }

    // array levels
    static class Test3a {
        Test3a(){}
        // expect 4+2+4=10
        String [][] SA_21_12c  = new  String @A @A @B [2] @A @B @B[2];
        String [][] SA_01_10c  = new  String @B [2] @A [2];
        String [][] SA_11_11c = new  String @A @B [2] @A @B [2];
    }

    static class Test3b {
        Test3b(){}
        // expect 4+2=6
        String [][] SA_22_22c  = new  String @A @A @B @B[2] @A @A @B @B[2];
        String [][] SA_20_02c  = new  String @A @A [2] @B @B[2];
    }
    static class Test3c {
        Test3c(){}
        // OK expect 4
        String @A [] @A[] SA_10_10  = new  String [2][2];
        String @A [] @B[] SA_10_01  = new  String [2][2];
        String @A @A @B[] @A @B @B [] SA_21_12  = new  String [2][2];
    }

    static class Test3d {
        Test3d(){}
        // OK expect 4
        String @A @A [] @B @B [] SA_20_02  = new  String [2][2];
        String @A @A @B @B[] @A @A @B @B [] SA_22_22  = new  String [2][2];
    }

    // on new
    static class Test4a {
        Test4a(){}
        // expect 2+2=4
        String nS_21 = new @A @A @B String("Hello");
        String nS_12 = new @A @B @B String("Hello");
    }

    static class Test4b {
        Test4b(){}
        // expect 1+1+2=4
        String nS20 = new @A @A String("Hello");
        String nS02 = new @B @B String("Hello");
        String nS22 = new @A @A @B @B String("Hello");
    }

    // Cast expressions
    static class Test5a {
        Test5a(){}
        Object o = new Integer(1);
        // expect 2+2=4
        Integer ci11 = (@A @B Integer)o;       // OK expect 3, got 3
        Integer ci21 = (@A @A @B Integer)o;    // OK expect 3, got 3
    }

    static class Test5b {
        Test5b(){}
        Object o = new Integer(1);
        // Cast expressions
        // expect 1+2=3
        Integer ci2 =  (@A @A Integer)o;       // FAIL expect 2, got 1
        Integer ci22 = (@A @A @B @B Integer)o; // FAIL expect 3, got 1
    }

@Retention(RUNTIME) @Target({TYPE_USE}) @Repeatable( AC.class ) @interface A { }
@Retention(RUNTIME) @Target({TYPE_USE}) @Repeatable( BC.class ) @interface B { }
@Retention(RUNTIME) @Target({FIELD}) @Repeatable( FC.class ) @interface F { }
@Retention(RUNTIME) @Target({TYPE_USE}) @interface AC { A[] value(); }
@Retention(RUNTIME) @Target({TYPE_USE}) @interface BC { B[] value(); }
@Retention(RUNTIME) @Target({FIELD}) @interface FC { F[] value(); }

}

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