jsonread.java

/**
 * $Id: jsonread.java 698 2012-06-05 23:17:15Z daldei $
 * $Date: 2012-06-05 19:17:15 -0400 (Tue, 05 Jun 2012) $
 *
 */

package org.xmlsh.modules.json;

import java.io.InputStream;
import java.util.List;

import org.xmlsh.core.BuiltinCommand;
import org.xmlsh.core.InputPort;
import org.xmlsh.core.InvalidArgumentException;
import org.xmlsh.core.Options;
import org.xmlsh.core.XValue;
import org.xmlsh.json.JSONUtils;
import org.xmlsh.sh.shell.SerializeOpts;
import org.xmlsh.types.TypeFamily;
import org.xmlsh.util.JavaUtils;
import org.xmlsh.util.Util;

import com.fasterxml.jackson.databind.JsonNode;

public class jsonread extends BuiltinCommand {

	/*
	 *  Read JSON input and parse it as a JSON object
	 *  
	 */


	@Override
	public int run( List<XValue> args ) throws Exception {


		Options opts = new Options( "+jsonp,p=port:,c=class:,cp=classpath:" ,  SerializeOpts.getOptionDefs());
		opts.parse(args);

		String port = opts.getOptString("p", null);
		boolean jsonp = opts.getOptFlag("jsonp",false);
		String clsName = opts.getOptString("class", null);
		XValue classPath = opts.getOptValue("classpath");
		args = opts.getRemainingArgs();

		if( args.size() != 1 )
			throw new InvalidArgumentException("requires 1 argument");

		mShell.getEnv().unsetVar(args.get(0).toString());

		setSerializeOpts(getSerializeOpts());
		SerializeOpts inputOpts = getSerializeOpts().clone();


		InputPort stdin = mShell.getEnv().getStdin();

		XValue value = null ;
		Class<?> cls = null;
		try (
				InputStream is = stdin.asInputStream( inputOpts );
				){
			if( jsonp ) {
				String jsonpFunc = Util.skipToByte(is, '(');
				if( jsonpFunc == null ) {
					printErr("No JSONP prefix found");
					return 1;
				}
			}
			if( clsName != null ) {
				cls = JavaUtils.findClass(clsName, getClassLoader(classPath) );
				if( cls == null ) {
					printErr("Cannot locate class from name:" + clsName);
					return 1;
				}
			}

			if( cls != null ) {
				Object  obj = JSONUtils.readJsonValue( is , cls );
				if( obj == null ) {
					printErr("Reading json value to class failed");
					return 1;
				}

				value = XValue.newXValue(TypeFamily.JSON, obj );

			} else {
				JsonNode node  = JSONUtils.readJsonNode(is);
				if( node == null ) {
					printErr("Reading json value to json node failed");
					return 1;
				}
				value = XValue.newXValue(TypeFamily.JSON, node);
			}
			mShell.getEnv().setVar(args.get(0).toString(), value);

		} 
		return value == null ? 1 : 0 ;
	}
}


//Copyright (C) 2008-2014    David A. Lee.

//The contents of this file are subject to the "Simplified BSD License" (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.opensource.org/licenses/bsd-license.php 

//Software distributed under the License is distributed on an "AS IS" basis,
//WITHOUT WARRANTY OF ANY KIND, either express or implied.
//See the License for the specific language governing rights and limitations under the License.

//The Original Code is: all this file.

//The Initial Developer of the Original Code is David A. Lee

//Portions created by (your name) are Copyright (C) (your legal entity). All Rights Reserved.

//Contributor(s): none.