de.intarsys.pdf.tools.kernel.PDFFileTools Maven / Gradle / Ivy

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This is a fork of http://sourceforge.net/projects/jpodlib/ as development seems to be frozen. We're providing some bug fixes along with deployments to maven.
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/*
 * Copyright (c) 2007, intarsys consulting GmbH
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 *
 * - Neither the name of intarsys nor the names of its contributors may be used
 *   to endorse or promote products derived from this software without specific
 *   prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
package de.intarsys.pdf.tools.kernel;

import de.intarsys.tools.locator.ILocator;
import de.intarsys.tools.locator.LocatorFactory;
import de.intarsys.tools.locator.URLLocator;
import de.intarsys.tools.system.SystemTools;

import java.io.File;
import java.io.IOException;
import java.net.URL;

public class PDFFileTools {

    private PDFFileTools() {
    }

    protected static ILocator getRoot(ILocator locator) {
        ILocator root = locator;
        while (root.getParent() != null) {
            root = root.getParent();
        }
        return root;
    }

    public static ILocator resolveLocator(String osIndependentPath, ILocator baseLocator) throws IOException {
        if (osIndependentPath.contains("://")) {
            // special case: url
            return new URLLocator(new URL(osIndependentPath));
        }
        String result = toOSPath(osIndependentPath);
        if (baseLocator == null) {
            return LocatorFactory.get().createLocator(result);
        }
        if (result.startsWith("\\") && !result.startsWith("\\\\")) {
            // windows absolute without drive
            return getRoot(baseLocator).getChild(result);
        } else {
            File resultFile = new File(result);
            if (resultFile.isAbsolute()) {
                return LocatorFactory.get().createLocator(result);
            } else {
                return baseLocator.getChild(result);
            }
        }
    }

    public static String toOSIndependentPath(String osPath) {
        // todo mac support
        if (SystemTools.isWindows()) {
            return windowsToOSIndependentPath(osPath);
        } else {
            return osPath;
        }
    }

    public static String toOSPath(String osIndependentPath) {
        // todo mac support
        if (SystemTools.isWindows()) {
            return toWindowsPath(osIndependentPath);
        } else {
            return osIndependentPath;
        }
    }

    protected static String toWindowsPath(String osIndependentPath) {
        if (File.separatorChar == '/') {
            return osIndependentPath;
        }
        if (osIndependentPath.startsWith("///")) {
            // unc
            return "\\\\" + osIndependentPath.substring(3).replace("/", "\\");
        } else if (osIndependentPath.startsWith("//")) {
            // absolute without drive
            return "\\" + osIndependentPath.substring(2).replace("/", "\\");
        } else if (osIndependentPath.startsWith("/")) {
            // absolute with drive
            String windows = osIndependentPath.substring(1).replace("/", "\\");
            int index = windows.indexOf("\\");
            if (index < 0) {
                index = windows.length();
            }
            File drive = new File(windows.substring(0, index) + ":");
            if (drive.isDirectory()) {
                windows = windows.substring(0, index) + ":" + windows.substring(index);
            } else {
                // fallback for Acrobat 5 compatibility
                windows = "\\\\" + windows;
            }
            return windows;
        } else {
            // relative path
            return osIndependentPath.replace("/", "\\");
        }
    }

    protected static String windowsToOSIndependentPath(String osPath) {
        String osIndependentPath = osPath.replaceAll("\\\\", "/");
        int index = osIndependentPath.indexOf(":");
        if ((index >= 0) && (index < osIndependentPath.indexOf("/"))) {
            osIndependentPath = "/" + osIndependentPath.substring(0, index) + osIndependentPath.substring(index + 1);
        }
        return osIndependentPath;
    }
}