org.eclim.plugin.jdt.command.include.UnusedImportsCommand.java Source code

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Here is the source code for org.eclim.plugin.jdt.command.include.UnusedImportsCommand.java

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/**
 * Copyright (C) 2005 - 2009  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.include;

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.jdt.core.ICompilationUnit;
import org.eclipse.jdt.core.IJavaElement;

import org.eclipse.jdt.core.compiler.IProblem;

/**
 * Command which reports all unused imports for the specified file.
 *
 * @author Eric Van Dewoestine
 */
@Command(name = "java_imports_unused", options = "REQUIRED p project ARG," + "REQUIRED f file ARG")
public class UnusedImportsCommand extends AbstractCommand {
    private static final int[] UNUSED_IMPORTS = { IProblem.UnusedImport };

    /**
     * {@inheritDoc}
     */
    public String execute(CommandLine commandLine) throws Exception {
        String file = commandLine.getValue(Options.FILE_OPTION);
        String projectName = commandLine.getValue(Options.PROJECT_OPTION);

        ICompilationUnit src = JavaUtils.getCompilationUnit(projectName, file);

        IProblem[] problems = JavaUtils.getProblems(src, UNUSED_IMPORTS);
        ArrayList<String> results = new ArrayList<String>();
        for (int ii = 0; ii < problems.length; ii++) {
            IJavaElement element = src.getElementAt(problems[ii].getSourceStart());
            if (element != null) {
                results.add(element.getElementName());
            }
        }
        return UnusedImportsFilter.instance.filter(commandLine, results);
    }
}