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us.monoid.web.jp.javacc.json.jj Maven / Gradle / Ivy

/*@bgen(jjtree) Generated By:JJTree: Do not edit this line. json.jj */
/*@egen*/options
{
  STATIC = false;
  DEBUG_PARSER = false;
  ERROR_REPORTING = true;
                           
                                    
                              
}

PARSER_BEGIN(JSONPathCompiler)
package us.monoid.web.jp.javacc;

import us.monoid.json.*;
import java.util.*;

public class JSONPathCompiler/*@bgen(jjtree)*/implements JSONPathCompilerTreeConstants/*@egen*/ {/*@bgen(jjtree)*/
  protected JJTJSONPathCompilerState jjtree = new JJTJSONPathCompilerState();

/*@egen*/
  
  public static class JSONPathExpr extends AbstractJSONExpr {
    JSONPathExpr(int i) {
      super (i);
    }
    public void dump(String prefix) {
      System.out.println(prefix + toString());
      if (children != null && children.length > 0) {
        System.out.println(prefix + " [");
        for (int i = 0; children != null && i < children.length; ++i) {
          System.out.print(prefix + " (" + (i + 1) + ")");
          SimpleNode c = (SimpleNode) children [i];
          if (c == null) {
            System.out.println("null");
          } else {
            c.dump(prefix + " ");
          }
        }
        System.out.println(prefix + " ]");
      }
    }

    public Object eval(Object o) throws JSONException {
      if (o == null) return null;
      switch (this.id) {
        case JJTIMAGE:
        {
			return this.value;
        }
        case JJTEXPRESSION: {
          if (getChildrenCount() == 0) return null;
          for (int i = 0; o != null && i < getChildrenCount(); ++i) {
            o = at(i).eval(o);
          }
          return o;
        }
        case JJTARRAY: {
          if (this.value instanceof Integer) {
          int index = Integer.class.cast(this.value);
          if (o instanceof JSONArray) {
            JSONArray array = JSONArray.class.cast(o);
            return array.get(index);
     	   } else {
    	    return null;
    	   }
    	 } else { // AST contains a selector expression. evaluate it against all objects in array
 			if (o instanceof JSONArray) {
            	JSONArray array = JSONArray.class.cast(o);
            	// match first strategy. only one item is returned
            	Object result = null;
            	match:
            	for (int i = 0, len = array.length(); i < len; i++) {
            	  Object item = array.get(i);
            	  boolean test = at(0).test(item);
           		  if (test) {
           		    result = item; // evaluation can continue on this item
           		  	break;
           		 }
            	}
            	return result;
        	}  	
    	 }
        }
        case JJTOBJECT: {
          if (o instanceof JSONObject) {
            JSONObject json = JSONObject.class.cast(o);
            return json.get(this.value.toString());
          } else if (o instanceof JSONArray)
          {
            JSONArray array = JSONArray.class.cast(o);
           // return all items
           List