/*
 * Copyright (C) 2014, United States Government, as represented by the
 * Administrator of the National Aeronautics and Space Administration.
 * All rights reserved.
 *
 * The Java Pathfinder core (jpf-core) platform is 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 gov.nasa.jpf.util.json;

import gov.nasa.jpf.vm.ElementInfo;
import gov.nasa.jpf.vm.MJIEnv;

import java.util.HashMap;

public class CreatorsFactory {

  static private final HashMap<String, Creator> creatorsTable = new HashMap<String, Creator>();

  static {
    creatorsTable.put("java.lang.Boolean", new BoxedBoolCreator());
    creatorsTable.put("java.lang.Byte", new BoxedByteCreator());
    creatorsTable.put("java.lang.Short", new BoxedShortCreator());
    creatorsTable.put("java.lang.Integer", new BoxedIntCreator());
    creatorsTable.put("java.lang.Long", new BoxedLongCreator());
    creatorsTable.put("java.lang.Float", new BoxedFloatCreator());
    creatorsTable.put("java.lang.Double", new BoxedDoubleCreator());
    creatorsTable.put("java.lang.String", new StringCreator());
  }

  public static Creator getCreator(String typeName) {

    return creatorsTable.get(typeName);
  }
}


class BoxedBoolCreator implements Creator {
  @Override
  public int create(MJIEnv env, String typeName, Value value) {
    Boolean read = value.getBoolean();
    int boolRef = MJIEnv.NULL;

    if (read != null) {
      boolRef = env.newObject("java.lang.Boolean");
      ElementInfo ei = env.getModifiableElementInfo(boolRef);
      ei.setBooleanField("value", (read == true));
    }

    return boolRef;
  }
}

class BoxedByteCreator implements Creator {
  @Override
  public int create(MJIEnv env, String typeName, Value value) {
    Double read = value.getDouble();
    int byteRef = MJIEnv.NULL;

    if (read != null) {
      byteRef = env.newObject("java.lang.Byte");
      ElementInfo ei = env.getModifiableElementInfo(byteRef);
      ei.setByteField("value", read.byteValue());
    }

    return byteRef;
  }
}

class BoxedShortCreator implements Creator {
  @Override
  public int create(MJIEnv env, String typeName, Value value) {
    Double read = value.getDouble();
    int shortRef = MJIEnv.NULL;

    if (read != null) {
      shortRef = env.newObject("java.lang.Short");
      ElementInfo ei = env.getModifiableElementInfo(shortRef);
      ei.setShortField("value", read.shortValue());
    }

    return shortRef;
  }
}

class BoxedIntCreator implements Creator {
  @Override
  public int create(MJIEnv env, String typeName, Value value) {
    Double read = value.getDouble();
    int intRef = MJIEnv.NULL;

    if (read != null) {
      intRef = env.newObject("java.lang.Integer");
      ElementInfo ei = env.getModifiableElementInfo(intRef);
      ei.setIntField("value", read.intValue());
    }

    return intRef;
  }
}

class BoxedLongCreator implements Creator {
  @Override
  public int create(MJIEnv env, String typeName, Value value) {
    Double read = value.getDouble();
    int longRef = MJIEnv.NULL;

    if (read != null) {
      longRef = env.newObject("java.lang.Long");
      ElementInfo ei = env.getModifiableElementInfo(longRef);
      ei.setLongField("value", read.longValue());
    }

    return longRef;
  }
}

class BoxedFloatCreator implements Creator {
  @Override
  public int create(MJIEnv env, String typeName, Value value) {
    Double read = value.getDouble();
    int floatRef = MJIEnv.NULL;

    if (read != null) {
      floatRef = env.newObject("java.lang.Float");
      ElementInfo ei = env.getModifiableElementInfo(floatRef);
      ei.setFloatField("value", read.floatValue());
    }

    return floatRef;
  }
}

class BoxedDoubleCreator implements Creator {
  @Override
  public int create(MJIEnv env, String typeName, Value value) {
    Double read = value.getDouble();
    int doubleRef = MJIEnv.NULL;

    if (read != null) {
      doubleRef = env.newObject("java.lang.Double");
      ElementInfo ei = env.getModifiableElementInfo(doubleRef);
      ei.setDoubleField("value", read.doubleValue());
    }

    return doubleRef;
  }
}

class StringCreator implements Creator {

  @Override
  public int create(MJIEnv env, String typeName, Value value) {
    String strVal = value.getString();
    int stringRef = MJIEnv.NULL;

    if (strVal != null) {
      stringRef = env.newString(strVal);
    }

    return stringRef;
  }
}