org.tinfour.gis.shapefile.DbfFieldLogical Maven / Gradle / Ivy
/* --------------------------------------------------------------------
* Copyright (C) 2018 Gary W. Lucas.
*
* 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.
* ---------------------------------------------------------------------
*/
/*
* -----------------------------------------------------------------------
*
* Revision History:
* Date Name Description
* ------ --------- -------------------------------------------------
* 11/2018 G. Lucas Created
*
* Notes:
*
* -----------------------------------------------------------------------
*/
package org.tinfour.gis.shapefile;
import java.io.IOException;
import org.tinfour.io.BufferedRandomAccessReader;
/**
* Represents logical data field types.
*/
class DbfFieldLogical extends DbfField {
boolean value;
boolean valid;
DbfFieldLogical(String name, char fieldType, int dataAddress, int fieldLength, int fieldDecimalCount, int offset) {
super(name, fieldType, dataAddress, fieldLength, fieldDecimalCount, offset);
}
@Override
void read(BufferedRandomAccessReader brad, long recordFilePos) throws IOException {
brad.seek(recordFilePos + offset);
builder.setLength(0);
valid = false;
value = false;
for (int i = 0; i < fieldLength; i++) {
int b = brad.readUnsignedByte();
builder.append((char) b);
if (b == 'Y' || b == 'y' || b == 'T' || b == 't') {
value = true;
valid = true;
} else if (b == 'N' || b == 'n' || b == 'F' || b == 'f') {
value = true;
valid = true;
}
}
}
/**
* Gets a logical value.
* @return true if the field contains a logical value of TRUE; otherwise
* false.
*/
@Override
public boolean getLogicalValue(){
return value;
}
public Object getApplicationData(){
return value;
}
}