ru.ydn.wicket.wicketconsole.EmbeddedScriptEngine Maven / Gradle / Ivy

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package ru.ydn.wicket.wicketconsole;

import java.io.PrintWriter;
import java.io.StringReader;
import java.io.StringWriter;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;

import javax.script.Bindings;
import javax.script.ScriptContext;
import javax.script.ScriptEngine;
import javax.script.ScriptException;
import javax.script.SimpleScriptContext;

import org.apache.wicket.ajax.json.JSONException;
import org.apache.wicket.ajax.json.JSONObject;

public class EmbeddedScriptEngine implements IScriptEngine{

	private String name;
	private ScriptEngine engine;

	private transient ScriptContext ctx;
	
	private boolean asJSONComatibleAvailable = true;

	
	public EmbeddedScriptEngine(String name, ScriptEngine engine) {
		this.name = name;
		this.engine = engine;
		this.ctx = new SimpleScriptContext();
		ctx.setWriter(new StringWriter());
		ctx.setErrorWriter(new StringWriter());
		ctx.setReader(new StringReader(""));
	}

	@Override
	public String getName() {
		return name;
	}
	
	private static String getContentAndClear(StringWriter writer)
	{
		StringBuffer buf = writer.getBuffer();
		String ret = buf.toString();
		buf.setLength(0);
		return ret;
	}
	
	@Override
	public ScriptResult eval(String command,IScriptContext context) {
		ScriptResult result = new ScriptResult(name, command);
		if (context!=null){
			Set> bindings = context.getBindings().entrySet();
			for (Entry binding : bindings) {
				ctx.setAttribute(binding.getKey(), binding.getValue(), ScriptContext.ENGINE_SCOPE);
			}
		}
		
		try {
			Object ret = engine.eval(command, ctx);
			ctx.getBindings(ScriptContext.ENGINE_SCOPE).put("$result", ret);
			ret = tryConvertToJSON(ret);
			result.setResultModel(new StorageModel