Package org.apache.clerezza.triaxrs

Source Code of org.apache.clerezza.triaxrs.RootResourceDescriptor

/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership.  The ASF licenses this file
* to you 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.apache.clerezza.triaxrs;

import java.util.Map;

import javax.ws.rs.ext.Providers;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.clerezza.triaxrs.parameterinjectors.UnsupportedFieldType;
import org.apache.clerezza.triaxrs.util.URITemplate;
import org.wymiwyg.wrhapi.HandlerException;

class RootResourceDescriptor implements Comparable<RootResourceDescriptor> {

  //questionable
  //private Set<Class> httpMethodsOfClass;
  private Class<?> clazz;
  private URITemplate uriTemplate;
  private Object instance;
  private Logger logger = LoggerFactory.getLogger(RootResourceDescriptor.class);

  public RootResourceDescriptor(Class<?> clazz, String pathTemplate) {
    super();
    uriTemplate = new URITemplate(pathTemplate);
    this.clazz = clazz;
  //store methods of the class
  //httpMethodsOfClass = ReflectionUtil.getMethodsOfClass(clazz);
  }

  public RootResourceDescriptor(Class<?> clazz, Object instance,
      String pathTemplate, Providers providers) {
    super();
    uriTemplate = new URITemplate(pathTemplate);
    this.clazz = clazz;
    this.instance = instance;
    if (instance != null) {
      try {
        WebRequest requestProxy = WebRequestProxy.createProxy();
        InjectionUtilities.injectFields(requestProxy, null, providers, instance);
      } catch (HandlerException ex) {
        logger.debug("Exception {}", ex);
        throw new RuntimeException(ex);
      } catch (UnsupportedFieldType ex) {
        logger.debug("Exception {}", ex);
        throw new RuntimeException(ex);
      }
    }
  }

  public Object getInstance(WebRequest request, Map<String, String> pathParams) {
    if (instance != null) {
      return instance;
    } else {
      try {
        return InjectionUtilities.createPreparedInstance(request, pathParams, JaxRsHandler.providers, clazz);
      } catch (HandlerException e) {
        throw new RuntimeException(e);
      } catch (UnsupportedFieldType e) {
        throw new RuntimeException(e);
      }
    }
  }

  public URITemplate getUriTemplate() {
    return uriTemplate;
  }

  @Override
  public boolean equals(Object obj) {
    if (obj == null) {
      return false;
    }
    if (getClass() != obj.getClass()) {
      return false;
    }
    final RootResourceDescriptor other = (RootResourceDescriptor) obj;
    if (this.clazz != other.clazz && (this.clazz == null || !this.clazz.
        equals(other.clazz))) {
      return false;
    }
    if (this.uriTemplate != other.uriTemplate && (this.uriTemplate == null || !this.uriTemplate.
        equals(other.uriTemplate))) {
      return false;
    }
    if (this.instance != other.instance && (this.instance == null || !this.instance.
        equals(other.instance))) {
      return false;
    }
    return true;
  }

  @Override
  public int hashCode() {
    int hash = 7;
    hash = 37 * hash + (this.clazz != null ? this.clazz.hashCode() : 0);
    hash =
        37 * hash + (this.instance != null ? this.instance.hashCode() : 0);
    return hash;
  }

  @Override
  public int compareTo(RootResourceDescriptor o) {

    //compare uri template. If Uri template is the same, use the instance as the second key
    int uriCompare = uriTemplate.compareTo(o.uriTemplate);

    if (uriCompare != 0) {
      return uriCompare;
    }

    //instance is first
    if ((this.instance != null) && (o.instance == null)) {
      return -1;
    } else if ((o.instance != null) && (this.instance == null)) {
      return 1;
    }

    return 0;
  }
}
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