//
// Copyright 2013 Mike Friesen
//
// Licensed 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 ca.gobits.bnf.parser;
import ca.gobits.bnf.parser.states.BNFState;
import ca.gobits.bnf.tokenizer.BNFToken;
public class BNFPathStateDefinition implements BNFPath {
private BNFStateDefinition stateDefinition;
private BNFToken token;
private int position;
public BNFPathStateDefinition() {
this.position = 0;
}
public BNFStateDefinition getStateDefinition() {
return this.stateDefinition;
}
public void setStateDefinition(BNFStateDefinition stateDefinition) {
this.stateDefinition = stateDefinition;
}
@Override
public BNFToken getToken() {
return this.token;
}
public void setToken(BNFToken token) {
this.token = token;
}
@Override
public boolean isStateEnd() {
return false;
}
@Override
public String toString() {
return "state definition " + stateDefinition.getName() + " token " + token.getStringValue();
}
@Override
public boolean isStateDefinition() {
return true;
}
public boolean hasNextSequence()
{
BNFState state = null;
if (position < stateDefinition.getStates().size()) {
state = stateDefinition.getStates().get(position);
}
return state != null;
}
public BNFState getNextSequence() {
BNFState state = null;
if (position < stateDefinition.getStates().size()) {
state = stateDefinition.getStates().get(position);
position++;
}
return state;
}
@Override
public BNFState getNextState() {
BNFState state = null;
if (position < stateDefinition.getStates().size()) {
state = stateDefinition.getStates().get(position).getNextState();
}
return state;
}
}