Android Open Source - anode Types

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License

The source code is released under:
Apache License
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Java Source Code

/*
 * Copyright 2011-2012 Paddy Byers/* w ww .  j ava 2  s.  c o m*/
 *
 *   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 org.meshpoint.anode.idl;

import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.HashMap;
import java.util.List;

import org.w3c.dom.Array;
import org.w3c.dom.ByteArray;
import org.w3c.dom.DoubleArray;
import org.w3c.dom.IntegerArray;
import org.w3c.dom.LongArray;
import org.w3c.dom.ObjectArray;

/**
 * A single integer is used to represent a type of any argument
 * or return value of an operation.
 * For interface types, and array<interface> types, the type
 * includes the class id as (TYPE_INTERFACE | (classid << 16))
 * or (TYPE_INTERFACE | [TYPE_ARRAY|TYPE_SEQUENCE|TYPE_MAP] | (classid << 16))
 * @author paddy
 *
 */
public class Types {
  
  public static Object jsNull;
  public static Object jsUndefined;
  
  public static class TypeError extends RuntimeException {
    private static final long serialVersionUID = 4694411268187181961L;
  }

  /*
   * basic types
   */
  public static final int TYPE_INVALID   = -1;
  public static final int TYPE_NONE      = 0;
  public static final int TYPE_UNDEFINED = 1;
  public static final int TYPE_NULL      = 2;
  public static final int TYPE_BOOL      = 3;
  public static final int TYPE_BYTE      = 4;
  public static final int TYPE_SHORT     = 5;
  public static final int TYPE_INT       = 6;
  public static final int TYPE_LONG      = 7;
  public static final int TYPE_DOUBLE    = 8;
  public static final int TYPE_STRING    = 9;
  public static final int TYPE_FUNCTION  = 10;
  public static final int TYPE_DATE      = 11;

  public static final int TYPE_OBJECT    = 16;
  public static final int TYPE_SEQUENCE  = 32;
  public static final int TYPE_ARRAY     = 64;
  public static final int TYPE_INTERFACE = 128;
  public static final int TYPE_MAP       = 256;
  
  public static boolean isInterface(int type) {
    return (type & TYPE_INTERFACE) != 0;
  }
  
  public static boolean isSequence(int type) {
    return (type & TYPE_SEQUENCE) != 0;
  }

  public static boolean isArray(int type) {
    return (type & TYPE_ARRAY) != 0;
  }
  
  public static short getClassId(int type) {
    return type2classid(type);
  }
  
  public static int classid2Type(int classid) { return TYPE_INTERFACE | (classid << 16); }
  public static int classid2Type(short classid) { return TYPE_INTERFACE | (((int)classid) << 16); }
  public static short type2classid(int type) { return (short)(type >> 16); }
  
  public static int fromJavaType(InterfaceManager interfaceManager, Type javaType) {
    /* parameterised types are only supported for ObjectArray<T> */
    if(javaType instanceof ParameterizedType) {
      ParameterizedType paramType = (ParameterizedType)javaType;
      if(paramType.getRawType() == ObjectArray.class) {
        Type[] typeArgs = paramType.getActualTypeArguments();
        if(typeArgs.length == 1)
          return TYPE_ARRAY | fromJavaType(interfaceManager, typeArgs[0]);
      }
      else if(paramType.getRawType() == HashMap.class) {
        Type[] typeArgs = paramType.getActualTypeArguments();
        if(typeArgs.length == 2) {
          if(typeArgs[0] == String.class)
            return TYPE_MAP | fromJavaType(interfaceManager, typeArgs[1]);
        }
      }
      return TYPE_INVALID;
    }
    /* handle sequence types; mutidimensional types are not supported */
    Class<?> javaClass = (Class<?>)javaType;
    if(javaClass.isArray()) {
      Class<?> componentClass = javaClass.getComponentType();
      if(componentClass.isArray()) throw new IllegalArgumentException("Types.fromJavaType: mutidimensional arrays are not supported");
      return TYPE_SEQUENCE | fromJavaType(interfaceManager, componentClass);
    }
    /* handle array types; mutidimensional types are not supported */
    if(Array.class.isAssignableFrom(javaClass)) {
      int componentType = getArrayComponentType(javaClass);
      if(componentType != TYPE_INVALID)
        componentType |= TYPE_ARRAY;
      return componentType;
    }
    /* handle dictionary types */
    if(Dictionary.class.isAssignableFrom(javaClass)) {
      while(javaClass != Object.class) {
        IDLInterface iface = interfaceManager.getByClass(javaClass);
        if(iface != null) return classid2Type(iface.getId());
        javaClass = javaClass.getSuperclass();
      }
      return TYPE_INVALID;
    }
    /* handle basic types */
    int baseClassIndex = classMap.indexOf(javaClass);
    if(baseClassIndex != -1)
      return baseClassIndex;
    /* handle interface types */
    String canonicalName = javaClass.getCanonicalName();
    IDLInterface iface = interfaceManager.getByName(canonicalName);
    if(iface != null)
      return classid2Type(iface.getId());

    return TYPE_INVALID;
  }
  
  public static int getInterfaceType(InterfaceManager interfaceManager, IDLInterface obj) {
    int result;
    Class<?> class_ = obj.getClass();
    while(class_ != null) {
      result = fromJavaType(interfaceManager, class_);
      if(result != TYPE_INVALID) return result;
      for(Class<?> interface_ : class_.getInterfaces()) {
        result = fromJavaType(interfaceManager, interface_);
        if(result != TYPE_INVALID) return result;
      }
      class_ = class_.getSuperclass();
    }
    return TYPE_INVALID;
  }
  
  public static int getArrayComponentType(Class <?> javaClass) {
    int result = TYPE_INVALID;
    if(ByteArray.class.isAssignableFrom(javaClass))
      result = TYPE_BYTE;
    else if(IntegerArray.class.isAssignableFrom(javaClass))
      result = TYPE_INT;
    else if(LongArray.class.isAssignableFrom(javaClass))
      result = TYPE_LONG;
    else if(DoubleArray.class.isAssignableFrom(javaClass))
      result = TYPE_DOUBLE;
    return result;
  }
  
  public static IDLInterface baseInterface(InterfaceManager interfaceManager, int type) {
    if((type & (TYPE_SEQUENCE | TYPE_MAP | TYPE_ARRAY)) != 0)
      return baseInterface(interfaceManager, type & ~(TYPE_SEQUENCE | TYPE_MAP | TYPE_ARRAY));
    if(isInterface(type))
      return interfaceManager.getById(getClassId(type));
    return null;
  }

  public class Function {}

  /******************
   * private state
   ******************/
  private static List<Class<?>> classMap = new ArrayList<Class<?>>(Arrays.asList(new Class<?>[] {
    null,
    Void.TYPE,
    Void.TYPE,
    Boolean.TYPE,
    Byte.TYPE,
    Short.TYPE,
    Integer.TYPE,
    Long.TYPE,
    Double.TYPE,
    String.class,
    Function.class,
    Date.class,
    null,
    null,
    null,
    null,
    Object.class,
    null,
    null,
    Boolean.class,
    Byte.class,
    Short.class,
    Integer.class,
    Long.class,
    Double.class,
  }));
}
Java Source Code List
