org.eclim.plugin.jdt.command.src.NewCommand.java Source code

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Here is the source code for org.eclim.plugin.jdt.command.src.NewCommand.java

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/**
 * Copyright (C) 2005 - 2014  Eric Van Dewoestine
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.eclim.plugin.jdt.command.src;

import java.io.File;

import java.util.ArrayList;

import org.eclim.annotation.Command;

import org.eclim.command.CommandLine;
import org.eclim.command.Options;

import org.eclim.plugin.core.command.AbstractCommand;

import org.eclim.plugin.jdt.util.JavaUtils;

import org.eclipse.core.resources.IResource;

import org.eclipse.core.runtime.NullProgressMonitor;

import org.eclipse.jdt.core.ICompilationUnit;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.IPackageFragment;
import org.eclipse.jdt.core.IPackageFragmentRoot;

import org.eclipse.jdt.core.formatter.CodeFormatter;

/**
 * Command to generate a new Java Type file
 *
 * @author Daniel Leong, Eric Van Dewoestine
 */
@Command(name = "java_new", options = "REQUIRED p project ARG," + "REQUIRED t type ARG," + "REQUIRED n name ARG,"
        + "OPTIONAL r root ARG")
public class NewCommand extends AbstractCommand {
    static final String TEMPLATE = "package %1$s;\n\n" + "public %2$s %3$s {\n" + "}";

    @Override
    public Object execute(CommandLine commandLine) throws Exception {
        String projectName = commandLine.getValue(Options.PROJECT_OPTION);
        String type = commandLine.getValue(Options.TYPE_OPTION);
        String name = commandLine.getValue(Options.NAME_OPTION);
        String srcRoot = commandLine.getValue(Options.ROOT_OPTION);

        // handle someone typing a file path instead of a fully qualified class name
        if (name.endsWith(".java")) {
            name = name.substring(0, name.length() - 5);
        }
        name = name.replace('/', '.');

        int classStart = name.lastIndexOf('.');
        final String packageName = classStart >= 0 ? name.substring(0, classStart) : name;
        final String typeName = classStart >= 0 ? name.substring(classStart + 1) : name;
        final String fileName = typeName + ".java";

        IJavaProject javaProject = JavaUtils.getJavaProject(projectName);

        ArrayList<IPackageFragmentRoot> roots = new ArrayList<IPackageFragmentRoot>();

        // find all roots the requested package is found in.
        for (IPackageFragment f : javaProject.getPackageFragments()) {
            if (f.getElementName().equals(packageName)) {
                IJavaElement parent = f.getParent();
                while (parent != null) {
                    if (parent instanceof IPackageFragmentRoot) {
                        IPackageFragmentRoot root = (IPackageFragmentRoot) parent;
                        if (root.getKind() == IPackageFragmentRoot.K_SOURCE) {
                            roots.add(root);
                        }
                        break;
                    }
                    parent = parent.getParent();
                }
            }
        }

        // the package isn't found in any roots
        if (roots.size() == 0) {
            // no root supplied, so we have to add all src roots to a list for the
            // user to choose from.
            for (IPackageFragmentRoot root : javaProject.getPackageFragmentRoots()) {
                if (root.getKind() == IPackageFragmentRoot.K_SOURCE) {
                    roots.add(root);
                }
            }
        }

        // still no source roots, so we have to fail
        if (roots.size() == 0) {
            throw new RuntimeException("No project source directories found.");
        }

        if (roots.size() > 1) {
            // user chosen root supplied, so grab that one.
            if (srcRoot != null) {
                roots.clear();
                for (IPackageFragmentRoot root : javaProject.getPackageFragmentRoots()) {
                    if (root.getKind() == IPackageFragmentRoot.K_SOURCE && getPath(root).equals(srcRoot)) {
                        roots.add(root);
                        break;
                    }
                }

                if (roots.size() == 0) {
                    throw new RuntimeException("Unable to find project source directory: " + srcRoot);
                }
            }

            if (roots.size() > 1) {
                ArrayList<String> srcRoots = new ArrayList<String>();
                for (IPackageFragmentRoot root : roots) {
                    srcRoots.add(getPath(root));
                }
                return srcRoots;
            }
        }

        IPackageFragmentRoot root = roots.get(0);
        IPackageFragment fragment = root.createPackageFragment(packageName, false, null);

        // locate the to-be created file
        File fragmentPath = fragment.getUnderlyingResource().getLocation().toFile();
        final File file = new File(fragmentPath, fileName);

        // make sure eclipse is up to date, in case the user
        //  deleted the file outside of eclipse's knowledge
        fragment.getUnderlyingResource().refreshLocal(IResource.DEPTH_ONE, new NullProgressMonitor());

        // create!
        final String content = String.format(TEMPLATE, packageName, getType(type), typeName);

        // NB: If we delete the file outside of Eclipse'
        //  awareness, it will whine if we then try to
        //  recreate it. So, if we *know* the file doesn't
        //  exist, force it.
        ICompilationUnit unit = fragment.createCompilationUnit(fileName, content, false, new NullProgressMonitor());

        if (unit == null || !file.exists()) {
            throw new RuntimeException("Could not create " + file);
        }

        JavaUtils.format(unit, CodeFormatter.K_COMPILATION_UNIT, 0, unit.getBuffer().getLength());

        return file.getAbsolutePath();
    }

    private String getType(String type) {
        if ("abstract".equals(type)) {
            return "abstract class";
        }

        return type;
    }

    private String getPath(IPackageFragmentRoot root) throws Exception {
        return root.getRawClasspathEntry().getPath().toString();
    }
}