/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You under the Apache License, Version 2.0
 *  (the "License"); you may not use this file except in compliance with
 *  the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 */

package org.apache.tools.ant.taskdefs.compilers;

import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.types.Commandline;
import org.apache.tools.ant.types.Path;

/**
 * The implementation of the xajavac compiler.
 */
public class Xajavac extends DefaultCompilerAdapter {

    /**
     * Performs a compile using the Xajavac compiler.
     * @return true if the compilation succeeded
     * @throws BuildException on error
     */
    public boolean execute() throws BuildException {
        attributes.log("Using xajavac compiler", Project.MSG_VERBOSE);
        String xajavac = "xajavac.jar";
        if (project.getProperty("xajavac.path")!=null) {
          xajavac = project.getProperty("xajavac.path");
        }
        
        Commandline cmd = new Commandline();
        
        cmd.createArgument().setValue("-Xbootclasspath/p:"+xajavac);
        cmd.createArgument().setValue("com.sun.tools.javac.Main");
        
        Path classpath = getCompileClasspath();
        // For -sourcepath, use the "sourcepath" value if present.
        // Otherwise default to the "srcdir" value.
        Path sourcepath = null;
        if (compileSourcepath != null) {
            sourcepath = compileSourcepath;
        } else {
            sourcepath = src;
        }

        String memoryParameterPrefix = assumeJava11() ? "-J-" : "-J-X";
        if (memoryInitialSize != null) {
            if (!attributes.isForkedJavac()) {
                attributes.log("Since fork is false, ignoring "
                               + "memoryInitialSize setting.",
                               Project.MSG_WARN);
            } else {
                cmd.createArgument().setValue(memoryParameterPrefix
                                              + "ms" + memoryInitialSize);
            }
        }

        if (memoryMaximumSize != null) {
            if (!attributes.isForkedJavac()) {
                attributes.log("Since fork is false, ignoring "
                               + "memoryMaximumSize setting.",
                               Project.MSG_WARN);
            } else {
                cmd.createArgument().setValue(memoryParameterPrefix
                                              + "mx" + memoryMaximumSize);
            }
        }

        if (attributes.getNowarn()) {
            cmd.createArgument().setValue("-nowarn");
        }

        if (deprecation) {
            cmd.createArgument().setValue("-deprecation");
        }

        if (destDir != null) {
            cmd.createArgument().setValue("-d");
            cmd.createArgument().setFile(destDir);
        }

        cmd.createArgument().setValue("-classpath");

        // Just add "sourcepath" to classpath ( for JDK1.1 )
        // as well as "bootclasspath" and "extdirs"
        if (assumeJava11()) {
            Path cp = new Path(project);

            Path bp = getBootClassPath();
            if (bp.size() > 0) {
                cp.append(bp);
            }

            if (extdirs != null) {
                cp.addExtdirs(extdirs);
            }
            cp.append(classpath);
            cp.append(sourcepath);
            cmd.createArgument().setPath(cp);
        } else {
            cmd.createArgument().setPath(classpath);
            // If the buildfile specifies sourcepath="", then don't
            // output any sourcepath.
            if (sourcepath.size() > 0) {
                cmd.createArgument().setValue("-sourcepath");
                cmd.createArgument().setPath(sourcepath);
            }
            if (target != null) {
                cmd.createArgument().setValue("-target");
                cmd.createArgument().setValue(target);
            }

            Path bp = getBootClassPath();
            if (bp.size() > 0) {
                cmd.createArgument().setValue("-bootclasspath");
                cmd.createArgument().setPath(bp);
            }

            if (extdirs != null && extdirs.size() > 0) {
                cmd.createArgument().setValue("-extdirs");
                cmd.createArgument().setPath(extdirs);
            }
        }

        if (encoding != null) {
            cmd.createArgument().setValue("-encoding");
            cmd.createArgument().setValue(encoding);
        }
        if (debug) {
            String debugLevel = attributes.getDebugLevel();
            if (debugLevel != null) {
                cmd.createArgument().setValue("-g:" + debugLevel);
            } else {
                cmd.createArgument().setValue("-g");
            }
        } else if (getNoDebugArgument() != null) {
            cmd.createArgument().setValue(getNoDebugArgument());
        }
        if (optimize) {
            cmd.createArgument().setValue("-O");
        }

        if (depend) {
            if (assumeJava11()) {
                cmd.createArgument().setValue("-depend");
            } else if (assumeJava12()) {
                cmd.createArgument().setValue("-Xdepend");
            } else {
                attributes.log("depend attribute is not supported by the "
                               + "modern compiler", Project.MSG_WARN);
            }
        }

        if (verbose) {
            cmd.createArgument().setValue("-verbose");
        }

        addCurrentCompilerArgs(cmd);

        int firstFileName = cmd.size();

        Path boot = getBootClassPath();
        if (boot.size() > 0) {
            cmd.createArgument().setValue("-bootclasspath");
            cmd.createArgument().setPath(boot);
        }

        if (attributes.getSource() != null && !assumeJava13()) {
            cmd.createArgument().setValue("-source");
            String source = attributes.getSource();
            if ((assumeJava14() || assumeJava15())
                && (source.equals("1.1") || source.equals("1.2"))) {
                // support for -source 1.1 and -source 1.2 has been
                // added with JDK 1.4.2 - and isn't present in 1.5.0 either
                cmd.createArgument().setValue("1.3");
            } else {
                cmd.createArgument().setValue(source);
            }
        } else if ((assumeJava15() || assumeJava16())
                   && attributes.getTarget() != null) {
            String t = attributes.getTarget();
            if (t.equals("1.1") || t.equals("1.2") || t.equals("1.3")
                || t.equals("1.4")) {
                String s = t;
                if (t.equals("1.1")) {
                    // 1.5.0 doesn't support -source 1.1
                    s = "1.2";
                }
                attributes.log("", Project.MSG_WARN);
                attributes.log("          WARNING", Project.MSG_WARN);
                attributes.log("", Project.MSG_WARN);
                attributes.log("The -source switch defaults to 1.5 in JDK 1.5 and 1.6.",
                               Project.MSG_WARN);
                attributes.log("If you specify -target " + t
                               + " you now must also specify -source " + s
                               + ".", Project.MSG_WARN);
                attributes.log("Ant will implicitly add -source " + s
                               + " for you.  Please change your build file.",
                               Project.MSG_WARN);
                cmd.createArgument().setValue("-source");
                cmd.createArgument().setValue(s);
            }
        }
        
        logAndAddFilesToCompile(cmd);

        String exec = getJavac().getExecutable();
        cmd.setExecutable(exec == null ? "java" : exec);

        attributes.log("Command line: "+cmd.toString(), Project.MSG_VERBOSE);

        return executeExternalCompile(cmd.getCommandline(), firstFileName) == 0;
    }


}