/* $Id$ */
/**
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (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.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.manifoldcf.scriptengine;
/** Insert command. This command inserts an object into an array, either at the specified position, or at the end. */
public class InsertCommand implements Command
{
/** Parse and execute. Parsing begins right after the command name, and should stop before the trailing semicolon.
*@param sp is the script parser to use to help in the parsing.
*@param currentStream is the current token stream.
*@return true to send a break signal, false otherwise.
*/
public boolean parseAndExecute(ScriptParser sp, TokenStream currentStream)
throws ScriptException
{
// Insert xxx into yyy [at zzz]
VariableReference objectRef = sp.evaluateExpression(currentStream);
if (objectRef == null)
sp.syntaxError(currentStream,"Missing object expression");
Variable object = objectRef.resolve();
Token t = currentStream.peek();
if (t == null || t.getToken() == null || !t.getToken().equals("into"))
sp.syntaxError(currentStream,"Missing 'into'");
currentStream.skip();
VariableReference targetRef = sp.evaluateExpression(currentStream);
if (targetRef == null)
sp.syntaxError(currentStream,"Missing target expression");
Variable target = sp.resolveMustExist(currentStream,targetRef);
t = currentStream.peek();
if (t != null && t.getToken() != null && t.getToken().equals("at"))
{
currentStream.skip();
VariableReference indexRef = sp.evaluateExpression(currentStream);
if (indexRef == null)
sp.syntaxError(currentStream,"Missing expression after 'at'");
target.insertAt(object,indexRef.resolve());
}
else
{
target.insertAt(object,null);
}
return false;
}
/** Parse and skip. Parsing begins right after the command name, and should stop before the trailing semicolon.
*@param sp is the script parser to use to help in the parsing.
*@param currentStream is the current token stream.
*/
public void parseAndSkip(ScriptParser sp, TokenStream currentStream)
throws ScriptException
{
if (sp.skipExpression(currentStream) == false)
sp.syntaxError(currentStream,"Missing object expression");
Token t = currentStream.peek();
if (t == null || t.getToken() == null || !t.getToken().equals("into"))
sp.syntaxError(currentStream,"Missing 'into'");
currentStream.skip();
if (sp.skipExpression(currentStream) == false)
sp.syntaxError(currentStream,"Missing target expression");
t = currentStream.peek();
if (t != null && t.getToken() != null && t.getToken().equals("at"))
{
currentStream.skip();
if (sp.skipExpression(currentStream) == false)
sp.syntaxError(currentStream,"Missing expression after 'at'");
}
}
}