JsonJavaArray.java

/*
 * © Copyright IBM Corp. 2012-2013
 * 
 * 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.ibm.commons.util.io.json;

import java.io.IOException;
import java.text.ParseException;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Map;

import com.ibm.commons.Platform;


/**
 *
 */
public class JsonJavaArray extends ArrayList<Object> implements JsonArray {

	private static final long serialVersionUID = 1L;

	public JsonJavaArray() {
	}

	public JsonJavaArray(int initialCapacity) {
		super(initialCapacity);
	}

	public JsonJavaArray(List<Object> list) {
		if(list!=null) {
			addAll(list);
		}
	}
	
	// Convert to a string
	public String toString() {
		try {
			return JsonGenerator.toJson(JsonJavaFactory.instanceEx, this);
		} catch(Exception ex) {
			Platform.getInstance().log(ex);
			return "";
		}
	}

	/** @ibm-api */
	public int length() {
		return size();
	}

	/** @ibm-api */
	public String getString(int index) {
		Object o = get(index);
		if(o!=null) {
			return (String)o;
		}
		return null;
	}

	/** @ibm-api */
	public double getNumber(int index) {
		Object o = get(index);
		if(o!=null) {
			return ((Number)o).doubleValue();
		}
		return 0.0;
	}

	/** @ibm-api */
	public boolean getBoolean(int index) {
		Object o = get(index);
		if(o!=null) {
			return (Boolean)o;
		}
		return false;
	}

	/** @ibm-api */
	public JsonObject getObject(int index) {
		Object o = get(index);
		if(o!=null) {
			return (JsonObject)o;
		}
		return null;
	}

	/** @ibm-api */
	public JsonArray getArray(int index) {
		Object o = get(index);
		if(o!=null) {
			return (JsonArray)o;
		}
		return null;
	}
	
	
	/** @ibm-api */
	public void put(int index, Object value) {
		// Emulate JavaScript with put: add the missing elements, if needed
		while(size()<=index) {
			add((Object)null);
		}
		set(index, value);
	}
	/** @ibm-api */
	public void putString(int index, String value) {
		put(index,value);
	}
	/** @ibm-api */
	public void putNumber(int index, double value) {
		put(index,value);
	}
	/** @ibm-api */
	public void putBoolean(int index, boolean value) {
		put(index,value);
	}
	/** @ibm-api */
	public void putObject(int index, JsonObject value) {
		put(index,value);
	}
	/** @ibm-api */
	public void putArray(int index, JsonArray value) {
		put(index,value);
	}
	
	/** @ibm-api */
	public void add(Object[] values) {
		if(values!=null) {
			for(int i=0; i<values.length; i++) {
				add(values[i]);
			}
		}
	}
	
	
	//
	// Typed helpers
	//
	
	/** @ibm-api */
	public String getAsString(int index) {
		Object v = get(index);
		if(v!=null) {
			return v.toString();
		}
		return null;
	}

	/** @ibm-api */
	public double getAsDouble(int index) {
		Object v = get(index);
		if(v instanceof Number) {
			return ((Number)v).doubleValue();
		}
		if(v instanceof String) {
			return Double.parseDouble((String)v);
		}
		if(v instanceof Boolean) {
			return (Boolean)v ? 1 : 0;
		}
		return 0;
	}

	/** @ibm-api */
	public int getAsInt(int index) {
		Object v = get(index);
		if(v instanceof Number) {
			return ((Number)v).intValue();
		}
		if(v instanceof String) {
			return Integer.parseInt((String)v);
		}
		if(v instanceof Boolean) {
			return (Boolean)v ? 1 : 0;
		}
		return 0;
	}

	/** @ibm-api */
	public long getAsLong(JsonObject o, int index) {
		Object v = get(index);
		if(v instanceof Number) {
			return ((Number)v).longValue();
		}
		if(v instanceof String) {
			return Long.parseLong((String)v);
		}
		if(v instanceof Boolean) {
			return (Boolean)v ? 1 : 0;
		}
		return 0;
	}

	/** @ibm-api */
	public boolean getAsBoolean(JsonObject o, int index) {
		Object v = get(index);
		if(v instanceof Boolean) {
			return ((Boolean)v).booleanValue();
		}
		if(v instanceof String) {
			String s = (String)v;
			if(s.equalsIgnoreCase("false") || s.equals("0")) {
				return false;
			}
			return true;
		}
		if(v instanceof Number) {
			return ((Number)o).doubleValue()!=0.0;
		}
		return v!=null;
	}

	/** @ibm-api */
	@SuppressWarnings({ "rawtypes", "unchecked" })
	public JsonJavaObject getAsObject(int index) {
		Object v = get(index);
		if(v instanceof JsonJavaObject) {
			return (JsonJavaObject)v;
		}
		if(v instanceof Map) {
			return new JsonJavaObject((Map)v);
		}
		return null;
	}

	/** @ibm-api */
	@SuppressWarnings({ "rawtypes", "unchecked" })
	public Map<String,Object> getAsMap(int index) {
		Object v = get(index);
		if(v instanceof Map) {
			return (Map)v;
		}
		return null;
	}

	/** @ibm-api */
	@SuppressWarnings({ "rawtypes", "unchecked" })
	public JsonJavaArray getAsArray(int index) {
		Object v = get(index);
		if(v instanceof JsonJavaArray) {
			return (JsonJavaArray)v;
		}
		if(v instanceof List) {
			return new JsonJavaArray((List)v);
		}
		return null;
	}

	/** @ibm-api */
	@SuppressWarnings("unchecked")
	public List<Object> getAsList(int index) {
		Object v = get(index);
		if(v instanceof List) {
			return (List<Object>)v;
		}
		return null;
	}

	
	//
	// Extensions
	//
	/** @ibm-api */
    public Date getJavaDate(int index) throws IOException, ParseException {
        String s = getString(index);
        if (s != null) {
            return JsonGenerator.stringToDate(s);
        }
        return null;
    }

	/** @ibm-api */
    public void putJavaDate(int index, Date value) throws IOException {
        if (value != null) {
            String dt = JsonGenerator.dateToString(value);
            put(index, dt);
        }
    }	
	
}