1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 package org.apache.tika.mime; 18 19 import java.io.ByteArrayInputStream; 20 import java.io.IOException; 21 22 import org.apache.tika.detect.MagicDetector; 23 import org.apache.tika.metadata.Metadata; 24 25 /** 26 * Defines a magic match. 27 */ 28 class MagicMatch implements Clause { 29 30 private final MagicDetector detector; 31 32 private final int length; 33 34 MagicMatch(MagicDetector detector, int length) throws MimeTypeException { 35 this.detector = detector; 36 this.length = length; 37 } 38 39 public boolean eval(byte[] data) { 40 try { 41 return detector.detect( 42 new ByteArrayInputStream(data), new Metadata()) 43 != MediaType.OCTET_STREAM; 44 } catch (IOException e) { 45 // Should never happen with a ByteArrayInputStream 46 return false; 47 } 48 } 49 50 public int size() { 51 return length; 52 } 53 54 public String toString() { 55 return detector.toString(); 56 } 57 58 }