org.csource.fastdfs.StructBase Maven / Gradle / Ivy
/**
* Copyright (C) 2008 Happy Fish / YuQing
*
* FastDFS Java Client may be copied only under the terms of the GNU Lesser
* General Public License (LGPL).
* Please visit the FastDFS Home Page http://www.csource.org/ for more detail.
*/
package org.csource.fastdfs;
import java.io.UnsupportedEncodingException;
import java.util.Date;
/**
* C struct body decoder
* @author Happy Fish / YuQing
* @version Version 1.17
*/
public abstract class StructBase {
protected static class FieldInfo {
protected String name;
protected int offset;
protected int size;
public FieldInfo(String name, int offset, int size) {
this.name = name;
this.offset = offset;
this.size = size;
}
}
/**
* set fields
* @param bs byte array
* @param offset start offset
*/
public abstract void setFields(byte[] bs, int offset);
protected String stringValue(byte[] bs, int offset, FieldInfo filedInfo) {
try {
return (new String(bs, offset + filedInfo.offset, filedInfo.size, ClientGlobal.g_charset)).trim();
} catch (UnsupportedEncodingException ex) {
ex.printStackTrace();
return null;
}
}
protected long longValue(byte[] bs, int offset, FieldInfo filedInfo) {
return ProtoCommon.buff2long(bs, offset + filedInfo.offset);
}
protected int intValue(byte[] bs, int offset, FieldInfo filedInfo) {
return (int) ProtoCommon.buff2long(bs, offset + filedInfo.offset);
}
protected int int32Value(byte[] bs, int offset, FieldInfo filedInfo) {
return ProtoCommon.buff2int(bs, offset + filedInfo.offset);
}
protected byte byteValue(byte[] bs, int offset, FieldInfo filedInfo) {
return bs[offset + filedInfo.offset];
}
protected boolean booleanValue(byte[] bs, int offset, FieldInfo filedInfo) {
return bs[offset + filedInfo.offset] != 0;
}
protected Date dateValue(byte[] bs, int offset, FieldInfo filedInfo) {
return new Date(ProtoCommon.buff2long(bs, offset + filedInfo.offset) * 1000);
}
}