| /* |
| * 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.axiom.util.stax.dialect; |
| |
| import javax.xml.stream.XMLStreamException; |
| |
| final class Scanner { |
| private final String s; |
| private int pos; |
| |
| Scanner(String s) { |
| this.s = s; |
| } |
| |
| int peek() { |
| return pos == s.length() ? -1 : s.charAt(pos); |
| } |
| |
| String getName() { |
| int start = pos; |
| while (pos < s.length()) { |
| char c = s.charAt(pos); |
| // This corresponds to the NameChar production, except for characters above 0x80. |
| // We expect that the underlying parser strictly enforces the grammar and we don't |
| // care here about NameStartChar and characters above 0x80. |
| if ('a' <= c && c <= 'z' || 'A' <= c && c <= 'Z' || '0' <= c && c <= '9' || c == ':' || c == '_' || c == '-' || c == '.' || c > 0x80) { |
| pos++; |
| } else { |
| break; |
| } |
| } |
| return pos == start ? null : s.substring(start, pos); |
| } |
| |
| String getQuotedString() throws XMLStreamException { |
| int quoteChar = peek(); |
| if (quoteChar == '\'' || quoteChar == '"') { |
| pos++; |
| int start = pos; |
| while (pos < s.length() && s.charAt(pos) != quoteChar) { |
| pos++; |
| } |
| if (peek() == quoteChar) { |
| return s.substring(start, pos++); |
| } else { |
| throw new XMLStreamException("Untermined quoted string"); |
| } |
| } else { |
| throw new XMLStreamException("Expected quote char at position " + pos); |
| } |
| } |
| |
| void expect(String seq) throws XMLStreamException { |
| boolean found; |
| if (pos+seq.length() > s.length()) { |
| found = false; |
| } else { |
| found = true; |
| for (int i=0; i<seq.length(); i++) { |
| if (s.charAt(pos+i) != seq.charAt(i)) { |
| found = false; |
| break; |
| } |
| } |
| } |
| if (found) { |
| pos += seq.length(); |
| } else { |
| throw new XMLStreamException("Expected \"" + seq + "\" at position " + pos); |
| } |
| } |
| |
| void skipSpace() { |
| while (pos < s.length()) { |
| char c = s.charAt(pos); |
| if (c == ' ' || c == '\t' || c == '\r' || c == '\n') { |
| pos++; |
| } else { |
| break; |
| } |
| } |
| } |
| } |