/*

 * Copyright (c) 2013, 2016, 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 8017216 8019422 8019421 8054956

 * @summary verify start and end positions

 * @modules java.compiler

 *          jdk.compiler

 * @run main TreeEndPosTest

 */

import java.io.ByteArrayOutputStream;

import java.io.File;

import java.io.IOException;

import java.io.PrintWriter;

import java.net.URI;

import java.util.ArrayList;

import java.util.List;

import javax.tools.Diagnostic;

import javax.tools.DiagnosticCollector;

import javax.tools.JavaCompiler;

import javax.tools.JavaFileManager;

import javax.tools.JavaFileObject;

import javax.tools.SimpleJavaFileObject;

import javax.tools.ToolProvider;

public class TreeEndPosTest {

    private static JavaFileManager getJavaFileManager(JavaCompiler compiler,

            DiagnosticCollector dc) {

        return compiler.getStandardFileManager(dc, null, null);

    }

    static class JavaSource extends SimpleJavaFileObject {

        final String source;

        int startPos;

        int endPos;

        private JavaSource(String filename, String source) {

            super(URI.create("myfo:/" + filename), JavaFileObject.Kind.SOURCE);

            this.source = source;

        }

        @Override

        public CharSequence getCharContent(boolean ignoreEncodingErrors) {

            return source;

        }

        static JavaSource createJavaSource(String preamble, String body,

                String postamble, String expected) {

            JavaSource js = createJavaSource(preamble, body, postamble, -1, -1);

            js.startPos = js.source.indexOf(expected);

            js.endPos   = js.startPos + expected.length();

            return js;

        }

        static JavaSource createJavaSource(String body, String expected) {

            return createJavaSource(null, body, null, expected);

        }

        private static JavaSource createJavaSource(String preamble, String body,

                String postamble, int start, int end) {

            final String name = "Bug";

            StringBuilder code = new StringBuilder();

            if (preamble != null) {

                code.append(preamble);

            }

            code.append("public class " + name + "{");

            if (body != null) {

                code.append(body);

            }

            code.append("}");

            if (postamble != null) {

                code.append(postamble);

            }

            JavaSource js = new JavaSource(name + ".java", code.toString());

            js.startPos = start;

            js.endPos = end;

            return js;

        }

    }

    public static void main(String... args) throws IOException {

        testUninitializedVariable();

        testMissingAnnotationValue();

        testUnresolvableAnnotationAttribute();

        testFinalVariableWithDefaultConstructor();

        testFinalVariableWithConstructor();

    }

    static void testUninitializedVariable() throws IOException {

        compile(JavaSource.createJavaSource("Object o = new A().new B(); class A { }",

                "B()"));

    }

    static void testMissingAnnotationValue() throws IOException {

        compile(JavaSource.createJavaSource("@Foo(\"vvvv\")",

                null, "@interface Foo { }", "\"vvvv\""));

    }

    static void testUnresolvableAnnotationAttribute() throws IOException {

        compile(JavaSource.createJavaSource("@Foo(value=\"vvvv\")",

                null, "@interface Foo { }", "value"));

    }

    static void testFinalVariableWithDefaultConstructor() throws IOException {

        compile(JavaSource.createJavaSource("private static final String Foo; public void bar() { }",

                "private static final String Foo;"));

    }

    static void testFinalVariableWithConstructor() throws IOException {

        compile(JavaSource.createJavaSource("public Bug (){} private static final String Foo; public void bar() { }",

                "{}"));

    }

    static void compile(JavaSource src) throws IOException {

        ByteArrayOutputStream ba = new ByteArrayOutputStream();

        PrintWriter writer = new PrintWriter(ba);

        File tempDir = new File(".");

        JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();

        DiagnosticCollector dc = new DiagnosticCollector();

        try (JavaFileManager javaFileManager = getJavaFileManager(compiler, dc)) {

            List<String> options = new ArrayList<>();

            options.add("-cp");

            options.add(tempDir.getPath());

            options.add("-d");

            options.add(tempDir.getPath());

            List<JavaFileObject> sources = new ArrayList<>();

            sources.add(src);

            JavaCompiler.CompilationTask task =

                    compiler.getTask(writer, javaFileManager,

                    dc, options, null,

                    sources);

            task.call();

            for (Diagnostic diagnostic : (List<Diagnostic>) dc.getDiagnostics()) {

                long actualStart = diagnostic.getStartPosition();

                long actualEnd = diagnostic.getEndPosition();

                System.out.println("Source: " + src.source);

                System.out.println("Diagnostic: " + diagnostic);

                System.out.print("Start position: Expected: " + src.startPos);

                System.out.println(", Actual: " + actualStart);

                System.out.print("End position: Expected: " + src.endPos);

                System.out.println(", Actual: " + actualEnd);

                if (src.startPos != actualStart || src.endPos != actualEnd) {

                    throw new RuntimeException("error: trees don't match");

                }

            }

        }

    }

}