com.vectorprint.configuration.binding.parameters.ParameterizableBindingFactoryImpl Maven / Gradle / Ivy

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This project is about configuration of applications and about parameterization of Objects. This library offers annotations (and annotation processors), parsers, typing, observing changes, serialization, cloning and more when working with settings and/or object parameters. Settings and its features can be declared using an xml format. The library offers syntax support for settings and parameters in a loosely coupled manner. You are not restricted to built in syntax, you can provide your own. At runtime this library tracks keys for which a default is used because they are not found in settings. Also it tracks unused keys. You can stack features for settings such as caching, preparing keys and values, readonlyness, threadsafety, helpsupport, reading / parsing from input. You can easily develop your own features for settings.

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/*
 * Copyright 2015 VectorPrint.
 *
 * 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.vectorprint.configuration.binding.parameters;

/*
 * #%L
 * Config
 * %%
 * Copyright (C) 2015 VectorPrint
 * %%
 * 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.
 * #L%
 */

import com.vectorprint.VectorPrintRuntimeException;
import com.vectorprint.configuration.generated.parser.ParameterizableParserImpl;
import java.io.Reader;
import java.io.StringReader;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;

/**
 * This implementation supports the fast built in syntax for parameters.
 * @see ParamBindingService
 * @author Eduard Drenth at VectorPrint.nl
 */
public class ParameterizableBindingFactoryImpl implements ParameterizableBindingFactory {

   private static final ParamBindingHelper bindingHelper = new EscapingBindingHelper();
   private static Constructor constructor;
   
   static {
      try {
         constructor = ParameterizableParserImpl.class.getConstructor(Reader.class);
      } catch (NoSuchMethodException | SecurityException ex) {
         throw new VectorPrintRuntimeException(ex);
      }
   }

   /**
    * instantiate parser, call {@link ParameterizableParser#setBindingHelper(com.vectorprint.configuration.binding.parameters.ParamBindingHelper) } and return the parser.
    * @param input
    * @return 
    */
   @Override
   public ParameterizableParser getParser(Reader input) {
      try {
         ParameterizableParser newInstance = constructor.newInstance(input);
         newInstance.setBindingHelper(getBindingHelper());
         return newInstance;
      } catch (InstantiationException | IllegalAccessException | IllegalArgumentException | InvocationTargetException | SecurityException ex) {
         throw new VectorPrintRuntimeException(ex);
      }
   }

   private static final Reader r = new StringReader("");

   /**
    * instantiate serializer, call {@link ParameterizableSerializer#setBindingHelper(com.vectorprint.configuration.binding.parameters.ParamBindingHelper)  } and return the serializer.
    * @return 
    */
   @Override
   public ParameterizableSerializer getSerializer() {
      try {
         ParameterizableSerializer ps = (ParameterizableSerializer) constructor.newInstance(r);
         ps.setBindingHelper(getBindingHelper());
         return ps;
      } catch (InstantiationException | IllegalAccessException | IllegalArgumentException | InvocationTargetException | SecurityException ex) {
         throw new VectorPrintRuntimeException(ex);
      }
   }

   @Override
   public ParamBindingHelper getBindingHelper() {
      return bindingHelper;
   }

   @Override
   public String toString() {
      return "ParameterizableBindingFactoryImpl{" + "bindingHelper=" + getBindingHelper().getClass() + ", parserClass=" + ParameterizableParserImpl.class + ", serializerClass=" + ParameterizableParserImpl.class + '}';
   }

}