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package com.avaje.ebean.text.json;

import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;

/**
 * JSON Object element.
 * 
 * You will only use the JsonElements when you register a JsonReadBeanVisitor.
 * The JSON elements that are not mapped to a bean property are made available
 * to the JsonReadBeanVisitor.
 * 
 * 
 * @see JsonReadBeanVisitor
 * 
 * @author rbygrave
 */
public class JsonElementObject implements JsonElement {

  private final Map map = new LinkedHashMap();

  public void put(String key, JsonElement value) {
    map.put(key, value);
  }

  private String[] split(String exp) {
    int pos = exp.indexOf('.');
    if (pos == -1) {
      return new String[] { exp, null };
    }
    String exp0 = exp.substring(0, pos);
    String exp1 = exp.substring(pos + 1);
    return new String[] { exp0, exp1 };
  }

  public Object eval(String exp) {
    String[] e = split(exp);
    return eval(e[0], e[1]);
  }

  public int evalInt(String exp) {
    String[] e = split(exp);
    return evalInt(e[0], e[1]);
  }

  public String evalString(String exp) {
    if (exp == null) {
      return map.toString();
    }
    String[] e = split(exp);
    return evalString(e[0], e[1]);
  }

  public boolean evalBoolean(String exp) {
    String[] e = split(exp);
    return evalBoolean(e[0], e[1]);
  }

  private Object eval(String exp0, String exp1) {
    JsonElement e = map.get(exp0);
    return e == null ? null : e.eval(exp1);
  }

  private int evalInt(String exp0, String exp1) {
    JsonElement e = map.get(exp0);
    return e == null ? 0 : e.evalInt(exp1);
  }

  private String evalString(String exp0, String exp1) {
    JsonElement e = map.get(exp0);
    return e == null ? "" : e.evalString(exp1);
  }

  private boolean evalBoolean(String exp0, String exp1) {
    JsonElement e = map.get(exp0);
    return e == null ? false : e.evalBoolean(exp1);
  }

  public JsonElement get(String key) {
    return map.get(key);
  }

  public JsonElement getValue(String key) {
    return map.get(key);
  }

  public Set keySet() {
    return map.keySet();
  }

  public Set> entrySet() {
    return map.entrySet();
  }

  public String toString() {
    return map.toString();
  }

  public boolean isPrimitive() {
    return false;
  }

  public String toPrimitiveString() {
    return null;
  }

}