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/**
 * Copyright © 2013 Sven Ruppert ([email protected])
 *
 * Licensed 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.reflections.vfs;

import java.io.IOException;
import java.io.InputStream;
import java.util.zip.ZipEntry;

/**
 *
 */
public class JarInputFile implements Vfs.File {
  private final ZipEntry entry;
  private final JarInputDir jarInputDir;
  private final long fromIndex;
  private final long endIndex;

  public JarInputFile(ZipEntry entry , JarInputDir jarInputDir , long cursor , long nextCursor) {
    this.entry = entry;
    this.jarInputDir = jarInputDir;
    fromIndex = cursor;
    endIndex = nextCursor;
  }

  public String getName() {
    String name = entry.getName();
    return name.substring(name.lastIndexOf("/") + 1);
  }

  public String getRelativePath() {
    return entry.getName();
  }

  public InputStream openInputStream() throws IOException {
    return new InputStream() {
      @Override
      public int read() throws IOException {
        if (jarInputDir.cursor >= fromIndex && jarInputDir.cursor <= endIndex) {
          int read = jarInputDir.jarInputStream.read();
          jarInputDir.cursor++;
          return read;
        } else {
          return - 1;
        }
      }
    };
  }
}