/* See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* Esri Inc. 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 com.esri.gpt.framework.isodate;
import java.io.IOException;
import java.io.InputStream;
class IsoDateInputStream extends InputStream {
private String isoDate;
private IsoDateContext isoDateContext;
private boolean filterOn = true;
public IsoDateInputStream(String isoDate, IsoDateContext isoDateContext) {
super();
this.isoDate = isoDate;
this.isoDateContext = isoDateContext;
}
public void filterOn() {
this.filterOn = true;
}
public void filterOff() {
this.filterOn = false;
}
@Override
public int read() throws IOException {
int ch = hasMore() ? isoDate.charAt(incIndex()) : -1;
if (filterOn) {
while (ch == ':' || (ch == '-' && getIndex() > 0)) {
ch = getIndex() < isoDate.length() ? isoDate.charAt(incIndex()) : -1;
}
}
return ch;
}
private void unread() {
if (getIndex()>=0) {
decIndex();
if (isoDate!=null) {
if (filterOn) {
while (getIndex()>0 && getIndex()<isoDate.length() && (isoDate.charAt(getIndex())==':' || isoDate.charAt(getIndex())=='-')) {
decIndex();
}
}
}
}
}
public void unread(int size) {
while (size-->0) unread();
}
int getIndex() {
return isoDateContext.getIndex();
}
int decIndex() {
isoDateContext.setIndex(isoDateContext.getIndex()-1);
return isoDateContext.getIndex();
}
int incIndex() {
isoDateContext.setIndex(isoDateContext.getIndex()+1);
return isoDateContext.getIndex();
}
public boolean hasMore() {
return isoDate != null && getIndex()+1 < isoDate.length();
}
}