org.apache.axiom.util.stax.dialect.Scanner Maven / Gradle / Ivy
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* 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("Unterminated 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