/*

 * 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 8003280

 * @summary Add lambda tests

 *  compile crashes on partial lambda expressions

 */

import com.sun.source.util.JavacTask;

import java.net.URI;

import java.util.Arrays;

import javax.tools.Diagnostic;

import javax.tools.JavaCompiler;

import javax.tools.JavaFileObject;

import javax.tools.SimpleJavaFileObject;

import javax.tools.StandardJavaFileManager;

import javax.tools.ToolProvider;

public class BadLambdaExpr {

    static int checkCount = 0;

    enum ParameterListKind {

        ZERO_ARY("()"),

        UNARY("(#P)"),

        TWO_ARY("(#P, #P)"),

        THREE_ARY("(#P, #P, #P)");

        String parametersTemplateStr;

        ParameterListKind(String parametersTemplateStr) {

            this.parametersTemplateStr = parametersTemplateStr;

        }

        String getParameterString(ParameterKind pk) {

            return parametersTemplateStr.replaceAll("#P", pk.parameterStr);

        }

    }

    enum ParameterKind {

        IMPLICIT("a"),

        EXPLIICT("A a");

        String parameterStr;

        ParameterKind(String parameterStr) {

            this.parameterStr = parameterStr;

        }

    }

    enum ArrowKind {

        NONE(""),

        SEMI("-"),

        FULL("->");

        String arrowStr;

        ArrowKind(String arrowStr) {

            this.arrowStr = arrowStr;

        }

    }

    enum ExprKind {

        NONE("#P#A"),

        METHOD_CALL("m(#P#A)"),

        CONSTR_CALL("new Foo(#P#A)");

        String expressionTemplate;

        ExprKind(String expressionTemplate) {

            this.expressionTemplate = expressionTemplate;

        }

        String expressionString(ParameterListKind plk, ParameterKind pk,

                ArrowKind ak) {

            return expressionTemplate.replaceAll("#P", plk.getParameterString(pk))

                    .replaceAll("#A", ak.arrowStr);

        }

    }

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

        //create default shared JavaCompiler - reused across multiple compilations

        JavaCompiler comp = ToolProvider.getSystemJavaCompiler();

        try (StandardJavaFileManager fm = comp.getStandardFileManager(null, null, null)) {

            for (ParameterListKind plk : ParameterListKind.values()) {

                for (ParameterKind pk : ParameterKind.values()) {

                    for (ArrowKind ak : ArrowKind.values()) {

                        for (ExprKind ek : ExprKind.values()) {

                            new BadLambdaExpr(plk, pk, ak, ek).run(comp, fm);

                        }

                    }

                }

            }

            System.out.println("Total check executed: " + checkCount);

        }

    }

    ParameterListKind plk;

    ParameterKind pk;

    ArrowKind ak;

    ExprKind ek;

    JavaSource source;

    DiagnosticChecker diagChecker;

    BadLambdaExpr(ParameterListKind plk, ParameterKind pk, ArrowKind ak, ExprKind ek) {

        this.plk = plk;

        this.pk = pk;

        this.ak = ak;

        this.ek = ek;

        this.source = new JavaSource();

        this.diagChecker = new DiagnosticChecker();

    }

    class JavaSource extends SimpleJavaFileObject {

        String template = "class Test {\n" +

                          "   SAM s = #E;\n" +

                          "}";

        String source;

        public JavaSource() {

            super(URI.create("myfo:/Test.java"), JavaFileObject.Kind.SOURCE);

            source = template.replaceAll("#E", ek.expressionString(plk, pk, ak));

        }

        @Override

        public CharSequence getCharContent(boolean ignoreEncodingErrors) {

            return source;

        }

    }

    void run(JavaCompiler tool, StandardJavaFileManager fm) throws Exception {

        JavacTask ct = (JavacTask)tool.getTask(null, fm, diagChecker,

                null, null, Arrays.asList(source));

        try {

            ct.parse();

        } catch (Throwable ex) {

            throw new AssertionError("Error thron when parsing the following source:\n" + source.getCharContent(true));

        }

        check();

    }

    void check() {

        boolean errorExpected =

                ak != ArrowKind.NONE ||

                plk != ParameterListKind.UNARY ||

                pk != ParameterKind.IMPLICIT;

        if (errorExpected != diagChecker.errorFound) {

            throw new Error("bad diag for source:\n" +

                source.getCharContent(true));

        }

        checkCount++;

    }

    static class DiagnosticChecker implements javax.tools.DiagnosticListener<JavaFileObject> {

        boolean errorFound;

        @Override

        public void report(Diagnostic<? extends JavaFileObject> diagnostic) {

            if (diagnostic.getKind() == Diagnostic.Kind.ERROR) {

                errorFound = true;

            }

        }

    }

}