org.eclipse.jdt.internal.core.JarEntryFile.java Source code

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Here is the source code for org.eclipse.jdt.internal.core.JarEntryFile.java

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/*******************************************************************************
 * Copyright (c) 2000, 2016 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jdt.internal.core;

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

import org.eclipse.core.resources.IStorage;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.jdt.core.IJarEntryResource;
import org.eclipse.jdt.core.IJavaModelStatusConstants;
import org.eclipse.jdt.core.IPackageFragmentRoot;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.internal.compiler.util.JRTUtil;
import org.eclipse.jdt.internal.compiler.util.Util;

/**
 * A jar entry that represents a non-java file found in a JAR.
 *
 * @see IStorage
 */
public class JarEntryFile extends JarEntryResource {
    private static final IJarEntryResource[] NO_CHILDREN = new IJarEntryResource[0];

    public JarEntryFile(String simpleName) {
        super(simpleName);
    }

    @Override
    public JarEntryResource clone(Object newParent) {
        JarEntryFile file = new JarEntryFile(this.simpleName);
        file.setParent(newParent);
        return file;
    }

    @Override
    public InputStream getContents() throws CoreException {
        IPackageFragmentRoot root = getPackageFragmentRoot();
        if (Util.isJrt(root.getPath().toOSString())) {
            try {
                IPath rootPath = root.getPath();
                Object target = JavaModel.getTarget(rootPath, false);
                if (target != null && target instanceof File) {
                    return JRTUtil.getContentFromJrt((File) target, getEntryName(), root.getElementName());
                }
            } catch (IOException e) {
                throw new JavaModelException(e, IJavaModelStatusConstants.IO_EXCEPTION);
            }
            return null;
        } else {
            ZipFile zipFile = null;
            try {
                zipFile = getZipFile();
                if (JavaModelManager.ZIP_ACCESS_VERBOSE) {
                    System.out.println("(" + Thread.currentThread() //$NON-NLS-1$
                            + ") [JarEntryFile.getContents()] Creating ZipFile on " + zipFile.getName()); //$NON-NLS-1$
                }
                String entryName = getEntryName();
                ZipEntry zipEntry = zipFile.getEntry(entryName);
                if (zipEntry == null) {
                    throw new JavaModelException(
                            new JavaModelStatus(IJavaModelStatusConstants.INVALID_PATH, entryName));
                }
                byte[] contents = Util.getZipEntryByteContent(zipEntry, zipFile);
                return new ByteArrayInputStream(contents);
            } catch (IOException e) {
                throw new JavaModelException(e, IJavaModelStatusConstants.IO_EXCEPTION);
            } finally {
                // avoid leaking ZipFiles
                JavaModelManager.getJavaModelManager().closeZipFile(zipFile);
            }
        }
    }

    @Override
    public IJarEntryResource[] getChildren() {
        return NO_CHILDREN;
    }

    @Override
    public boolean isFile() {
        return true;
    }

    @Override
    public String toString() {
        return "JarEntryFile[" + getEntryName() + "]"; //$NON-NLS-2$ //$NON-NLS-1$
    }
}