Java example source code file (MapScriptObject.java)

This example Java source code file (MapScriptObject.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

hashmap, invocable, invocablecallable, mapscriptobject, method, methodcallable, object, reflection, string, undefined, util

The MapScriptObject.java Java example source code

/*
 * Copyright (c) 2007, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package sun.jvm.hotspot.utilities.soql;

import java.util.Map;
import java.util.HashMap;
import java.util.Collections;
import java.lang.reflect.Method;
import java.lang.reflect.Constructor;
import javax.script.Invocable;

/**
 * Simple implementation of ScriptObject interface
 * with property storage backed by a Map. This class
 * can be extended to override any of the methods, in
 * particular to add "function" valued properties.
 */
public class MapScriptObject implements ScriptObject {
  // map to store the properties
  private Map map;

  public MapScriptObject() {
    this(new HashMap());
  }

  public MapScriptObject(Map map) {
    // make it synchronized
    this.map = Collections.synchronizedMap(map);
  }

  public Object[] getIds() {
    return map.keySet().toArray();
  }

  public Object get(String name) {
    if (has(name)) {
      return map.get(name);
    } else {
      return UNDEFINED;
    }
  }

  public Object get(int index) {
    if (has(index)) {
      Object key = Integer.valueOf(index);
      return map.get(key);
    } else {
      return UNDEFINED;
    }
  }

  public void put(String name, Object value) {
    map.put(name, value);
  }

  public void put(int index, Object value) {
    map.put(Integer.valueOf(index), value);
  }

  public boolean has(String name) {
    return map.containsKey(name);
  }

  public boolean has(int index) {
    return map.containsKey(Integer.valueOf(index));
  }

  public boolean delete(String name) {
    if (map.containsKey(name)) {
      map.remove(name);
      return true;
    } else {
      return false;
    }
  }

  public boolean delete(int index) {
    Object key = Integer.valueOf(index);
    if (map.containsKey(key)) {
      map.remove(key);
      return true;
    } else {
      return false;
    }
  }

  // add a function valued property that invokes given Method
  protected void putFunction(Object target, Method method) {
    putFunction(target, method, true);
  }

  // add a function valued property that invokes given Method
  protected void putFunction(Object target, Method method, boolean wrapArgs) {
    map.put(method.getName(), new MethodCallable(target, method, wrapArgs));
  }

  // add a function valued property that invokes given script function
  protected void putFunction(Object target, String name, Invocable invocable) {
    map.put(name, new InvocableCallable(target, name, invocable));
  }
}