package com.smartandroid.sa.sql.util;
/*
* Copyright (C) 2014 Markus Pfeiffer
*
* 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.
*/
import java.io.IOException;
import java.io.InputStream;
public class Tokenizer {
private final InputStream mStream;
private boolean mIsNext;
private int mCurrent;
public Tokenizer(final InputStream in) {
this.mStream = in;
}
public boolean hasNext() throws IOException {
if (!this.mIsNext) {
this.mIsNext = true;
this.mCurrent = this.mStream.read();
}
return this.mCurrent != -1;
}
public int next() throws IOException {
if (!this.mIsNext) {
this.mCurrent = this.mStream.read();
}
this.mIsNext = false;
return this.mCurrent;
}
public boolean skip(final String s) throws IOException {
if (s == null || s.length() == 0) {
return false;
}
if (s.charAt(0) != this.mCurrent) {
return false;
}
final int len = s.length();
this.mStream.mark(len - 1);
for (int n = 1; n < len; n++) {
final int value = this.mStream.read();
if (value != s.charAt(n)) {
this.mStream.reset();
return false;
}
}
return true;
}
}