/*
* 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.karaf.shell.impl.console.parsing;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import org.apache.felix.gogo.jline.ParsedLineImpl;
import org.apache.felix.gogo.runtime.EOFError;
import org.apache.felix.gogo.runtime.Parser.Program;
import org.apache.felix.gogo.runtime.Parser.Statement;
import org.apache.felix.gogo.runtime.SyntaxError;
import org.apache.felix.gogo.runtime.Token;
import org.apache.karaf.shell.api.console.Command;
import org.apache.karaf.shell.api.console.CommandLine;
import org.apache.karaf.shell.api.console.Parser;
import org.apache.karaf.shell.api.console.Session;
import org.apache.karaf.shell.support.parsing.DefaultParser;
import org.jline.reader.ParsedLine;
public class KarafParser implements org.jline.reader.Parser {
private final Session session;
public KarafParser(Session session) {
this.session = session;
}
@Override
public ParsedLine parse(String line, int cursor, ParseContext parseContext) throws SyntaxError {
try {
return doParse(line, cursor);
} catch (EOFError e) {
throw new org.jline.reader.EOFError(e.line(), e.column(), e.getMessage(), e.missing());
} catch (SyntaxError e) {
throw new org.jline.reader.SyntaxError(e.line(), e.column(), e.getMessage());
}
}
private ParsedLine doParse(CharSequence line, int cursor) throws SyntaxError {
org.apache.felix.gogo.runtime.Parser parser = new org.apache.felix.gogo.runtime.Parser(line);
Program program = parser.program();
List<Statement> statements = parser.statements();
// Find corresponding statement
Statement statement = null;
for (int i = statements.size() - 1; i >= 0; i--) {
Statement s = statements.get(i);
if (s.start() <= cursor) {
boolean isOk = true;
// check if there are only spaces after the previous statement
if (s.start() + s.length() < cursor) {
for (int j = s.start() + s.length(); isOk && j < cursor; j++) {
isOk = Character.isWhitespace(line.charAt(j));
}
}
statement = s;
break;
}
}
if (statement != null && statement.tokens() != null && !statement.tokens().isEmpty()) {
String cmdName = session.resolveCommand(statement.tokens().get(0).toString());
String[] parts = cmdName.split(":");
Command cmd = parts.length == 2 ? session.getRegistry().getCommand(parts[0], parts[1]) : null;
Parser cmdParser = cmd != null ? cmd.getParser() : null;
if (cmdParser != null) {
final CommandLine cmdLine = cmdParser.parse(session, statement.toString(), cursor - statement.start());
return new ParsedLine() {
@Override
public String word() {
return cmdLine.getCursorArgument();
}
@Override
public int wordCursor() {
return cmdLine.getArgumentPosition();
}
@Override
public int wordIndex() {
return cmdLine.getCursorArgumentIndex();
}
@Override
public List<String> words() {
return Arrays.asList(cmdLine.getArguments());
}
@Override
public String line() {
return cmdLine.getBuffer();
}
@Override
public int cursor() {
return cmdLine.getBufferPosition();
}
};
}
return new ParsedLineImpl(program, statement, cursor, statement.tokens());
} else {
// TODO:
return new ParsedLineImpl(program, program, cursor, Collections.<Token>singletonList(program));
}
}
}