com.avaje.ebeaninternal.server.text.json.ReadJsonRawReader Maven / Gradle / Ivy

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/**
 * Copyright (C) 2009 Authors
 * 
 * This file is part of Ebean.
 * 
 * Ebean is free software; you can redistribute it and/or modify it 
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *  
 * Ebean 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 Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with Ebean; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA  
 */
package com.avaje.ebeaninternal.server.text.json;

import com.avaje.ebean.text.json.JsonElementArray;
import com.avaje.ebean.text.json.JsonElementBoolean;
import com.avaje.ebean.text.json.JsonElementNull;
import com.avaje.ebean.text.json.JsonElementNumber;
import com.avaje.ebean.text.json.JsonElementObject;
import com.avaje.ebean.text.json.JsonElementString;
import com.avaje.ebean.text.json.JsonElement;



public class ReadJsonRawReader {

    private final ReadJsonContext ctx;
    
    public ReadJsonRawReader(ReadJsonContext ctx){
        this.ctx = ctx;
    }

    public JsonElement readUnknownValue() {
        return readValue();
    }
    
    private JsonElement readValue() {
        
        ctx.ignoreWhiteSpace();
        
        char c = ctx.nextChar();
        
        switch (c) {
        case '{':
            return readObject();
            
        case '[':
            return readArray();
            
        case '"':
            return readString();

        default:
            return readUnquoted(c);
        }
    }

    private JsonElement readArray() {
        
        JsonElementArray a = new JsonElementArray();
                
        do {
            JsonElement value = readValue();
            a.add(value);            
            if (!ctx.readArrayNext()){
                break;
            }
        } while(true);
        
        return a;
    }

    private JsonElement readObject() {
        
        JsonElementObject o = new JsonElementObject();
        
        do {
            if (!ctx.readKeyNext()){
                break;
            } else {
                // we read a property key ...
                String key = ctx.getTokenKey();
                JsonElement value = readValue();
                
                o.put(key, value);
                
                if (!ctx.readValueNext()){
                    break;
                }
            } 
        } while(true);
        
        return o;
    }
    
    private JsonElement readString() {
        String s = ctx.readQuotedValue();
        return new JsonElementString(s);
    }
    
    private JsonElement readUnquoted(char c) {
        String s = ctx.readUnquotedValue(c);
        if ("null".equals(s)){
            return JsonElementNull.NULL;
 
        } else if ("true".equals(s)){
            return JsonElementBoolean.TRUE;
            
        } else if ("false".equals(s)) {
            return JsonElementBoolean.FALSE;
            
        }
        return new JsonElementNumber(s);
    }
}