/* * Copyright 2012 Sebastian Annies, Hamburg * * 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 com.coremedia.iso; import com.coremedia.iso.boxes.Box; import java.io.BufferedInputStream; import java.io.IOException; import java.io.InputStream; import java.lang.reflect.Constructor; import java.lang.reflect.InvocationTargetException; import java.net.URL; import java.util.Enumeration; import java.util.Properties; import java.util.regex.Matcher; import java.util.regex.Pattern; /** * A Property file based BoxFactory */ public class PropertyBoxParserImpl extends AbstractBoxParser { Properties mapping; Pattern constuctorPattern = Pattern.compile("(.*)\\((.*?)\\)"); public PropertyBoxParserImpl(String... customProperties) { InputStream is = getClass().getResourceAsStream("/isoparser-default.properties"); try { mapping = new Properties(); try { mapping.load(is); ClassLoader cl = Thread.currentThread().getContextClassLoader(); if (cl == null) { cl = ClassLoader.getSystemClassLoader(); } Enumeration<URL> enumeration = cl.getResources("isoparser-custom.properties"); while (enumeration.hasMoreElements()) { URL url = enumeration.nextElement(); InputStream customIS = url.openStream(); try { mapping.load(customIS); } finally { customIS.close(); } } for (String customProperty : customProperties) { mapping.load(getClass().getResourceAsStream(customProperty)); } } catch (IOException e) { throw new RuntimeException(e); } } finally { try { is.close(); } catch (IOException e) { e.printStackTrace(); // ignore - I can't help } } } public PropertyBoxParserImpl(Properties mapping) { this.mapping = mapping; } @Override public Box createBox(String type, byte[] userType, String parent) { invoke(type, userType, parent); try { Class<Box> clazz = (Class<Box>) Class.forName(clazzName); if (param.length > 0) { Class[] constructorArgsClazz = new Class[param.length]; Object[] constructorArgs = new Object[param.length]; for (int i = 0; i < param.length; i++) { if ("userType".equals(param[i])) { constructorArgs[i] = userType; constructorArgsClazz[i] = byte[].class; } else if ("type".equals(param[i])) { constructorArgs[i] = type; constructorArgsClazz[i] = String.class; } else if ("parent".equals(param[i])) { constructorArgs[i] = parent; constructorArgsClazz[i] = String.class; } else { throw new InternalError("No such param: " + param[i]); } } Constructor<Box> constructorObject = clazz.getConstructor(constructorArgsClazz); return constructorObject.newInstance(constructorArgs); } else { return clazz.newInstance(); } } catch (ClassNotFoundException e) { throw new RuntimeException(e); } catch (InstantiationException e) { throw new RuntimeException(e); } catch (IllegalAccessException e) { throw new RuntimeException(e); } catch (InvocationTargetException e) { throw new RuntimeException(e); } catch (NoSuchMethodException e) { throw new RuntimeException(e); } } StringBuilder buildLookupStrings = new StringBuilder(); String clazzName; String param[]; static String[] EMPTY_STRING_ARRAY = new String[0]; public void invoke(String type, byte[] userType, String parent) { String constructor; if (userType != null) { if (!"uuid".equals((type))) { throw new RuntimeException("we have a userType but no uuid box type. Something's wrong"); } constructor = mapping.getProperty("uuid[" + Hex.encodeHex(userType).toUpperCase() + "]"); if (constructor == null) { constructor = mapping.getProperty((parent) + "-uuid[" + Hex.encodeHex(userType).toUpperCase() + "]"); } if (constructor == null) { constructor = mapping.getProperty("uuid"); } } else { constructor = mapping.getProperty((type)); if (constructor == null) { String lookup = buildLookupStrings.append(parent).append('-').append(type).toString(); buildLookupStrings.setLength(0); constructor = mapping.getProperty(lookup); } } if (constructor == null) { constructor = mapping.getProperty("default"); } if (constructor == null) { throw new RuntimeException("No box object found for " + type); } if (!constructor.endsWith(")")) { param = EMPTY_STRING_ARRAY; clazzName = constructor; } else { Matcher m = constuctorPattern.matcher(constructor); boolean matches = m.matches(); if (!matches) { throw new RuntimeException("Cannot work with that constructor: " + constructor); } clazzName = m.group(1); if (m.group(2).length() == 0) { param = EMPTY_STRING_ARRAY; } else { param = m.group(2).length() > 0 ? m.group(2).split(",") : new String[]{}; } } } }