| /******************************************************************************* |
| * 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.olingo.odata2.core.uri.expression; |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| |
| import org.apache.olingo.odata2.api.edm.EdmLiteral; |
| |
| public class TokenList implements Iterator<Token> { |
| private ArrayList<Token> tokens = null; |
| int currentToken = 0; |
| |
| public TokenList() { |
| tokens = new ArrayList<Token>(); |
| } |
| |
| /** |
| * Append StringValue Token to tokens parameter |
| * @param position Position of parsed token |
| * @param kind Kind of parsed token |
| * @param uriLiteral String value of parsed token |
| */ |
| public void appendToken(final int position, final TokenKind kind, final String uriLiteral) { |
| Token token = new Token(kind, position, uriLiteral); |
| tokens.add(token); |
| return; |
| } |
| |
| /** |
| * Append CharValue Token to tokens parameter |
| * @param position Position of parsed token |
| * @param kind Kind of parsed token |
| * @param charValue Char value of parsed token |
| */ |
| public void appendToken(final int position, final TokenKind kind, final char charValue) { |
| Token token = new Token(kind, position, Character.toString(charValue)); |
| tokens.add(token); |
| return; |
| } |
| |
| /** |
| * Append UriLiteral Token to tokens parameter |
| * @param position Position of parsed token |
| * @param kind Kind of parsed token |
| * @param javaLiteral EdmLiteral of parsed token containing type and value of UriLiteral |
| */ |
| public void appendEdmTypedToken(final int position, final TokenKind kind, final String uriLiteral, |
| final EdmLiteral javaLiteral) { |
| Token token = new Token(kind, position, uriLiteral, javaLiteral); |
| tokens.add(token); |
| return; |
| } |
| |
| public Token lookToken() { |
| if (currentToken >= tokens.size()) { |
| return null; |
| } |
| |
| return tokens.get(currentToken); |
| } |
| |
| public Token lookPrevToken() { |
| if (currentToken - 1 < 0) { |
| return null; |
| } |
| |
| return tokens.get(currentToken - 1); |
| } |
| |
| public boolean hasTokens() { |
| return (!tokens.isEmpty()); |
| } |
| |
| public int tokenCount() { |
| int i = tokens.size(); |
| |
| return i; |
| } |
| |
| public Token expectToken(final TokenKind comma) throws TokenizerExpectError { |
| Token actual = next(); |
| if (actual == null) { |
| throw TokenizerExpectError.createNO_TOKEN_AVAILABLE(comma.toString()); |
| } |
| |
| if (comma != actual.getKind()) { |
| throw TokenizerExpectError.createINVALID_TOKENKIND_AT(comma, actual); |
| } |
| return actual; |
| } |
| |
| public Token expectToken(final TokenKind comma, final boolean throwFilterExpression) |
| throws ExpressionParserInternalError { |
| Token actual = next(); |
| if (actual == null) { |
| throw ExpressionParserInternalError.createNO_TOKEN_AVAILABLE(comma.toString()); |
| } |
| |
| if (comma != actual.getKind()) { |
| if (throwFilterExpression) { |
| throw ExpressionParserInternalError.createINVALID_TOKENKIND_AT(comma, actual); |
| } |
| } |
| return actual; |
| } |
| |
| public Token expectToken(final String literal) throws TokenizerExpectError { |
| Token actual = next(); |
| if (actual == null) { |
| throw TokenizerExpectError.createNO_TOKEN_AVAILABLE(literal); |
| } |
| |
| if (!literal.equals(actual.getUriLiteral())) { |
| throw TokenizerExpectError.createINVALID_TOKEN_AT(literal, actual); |
| } |
| return actual; |
| } |
| |
| public Token expectToken(final String literal, final boolean throwInternal) throws ExpressionParserInternalError { |
| Token actual = next(); |
| if (actual == null) { |
| throw ExpressionParserInternalError.createNO_TOKEN_AVAILABLE(literal); |
| } |
| |
| if (!literal.equals(actual.getUriLiteral())) { |
| if (throwInternal) { |
| throw ExpressionParserInternalError.createINVALID_TOKEN_AT(literal, actual); |
| } |
| } |
| return actual; |
| } |
| |
| public void skip() { |
| currentToken++; |
| } |
| |
| @Override |
| public boolean hasNext() { |
| return (currentToken < tokens.size()); |
| } |
| |
| @Override |
| public Token next() { |
| if (currentToken >= tokens.size()) { |
| return null; |
| } |
| |
| Token ret = tokens.get(currentToken); |
| currentToken++; |
| return ret; |
| } |
| |
| @Override |
| public void remove() { |
| throw new IllegalArgumentException("Method not allowed"); |
| } |
| |
| public Token elementAt(final int index) { |
| |
| return tokens.get(index); |
| } |
| |
| } |