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/* |
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openisis - an open implementation of the CDS/ISIS database |
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Version 0.8.x (patchlevel see file Version) |
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Copyright (C) 2001-2003 by Erik Grziwotz, erik@openisis.org |
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|
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This library is free software; you can redistribute it and/or |
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modify it under the terms of the GNU Lesser General Public |
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License as published by the Free Software Foundation; either |
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version 2.1 of the License, or (at your option) any later version. |
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|
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This library is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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Lesser General Public License for more details. |
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|
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You should have received a copy of the GNU Lesser General Public |
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License along with this library; if not, write to the Free Software |
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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|
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see README for more information |
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EOH */ |
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|
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package org.openisis; |
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|
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/** |
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Record implementation of openisis java binding. |
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<p> |
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$Id: Rec.java,v 1.4 2003/04/08 00:20:53 kripke Exp $ |
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@version $Revision: 1.4 $ |
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@author $Author: kripke $ |
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*/ |
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public class Rec { |
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|
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private static final int APPEND_LENGTH=10; |
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|
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private int myRowId; |
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private Field[] myFields; |
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private int myLength; |
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|
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public Rec ( int rowid, Field[] fields ) { |
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myRowId = rowid; |
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myFields = fields; |
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myLength=fields.length; |
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} |
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|
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public Rec (int rowid) { |
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myRowId=rowid; |
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myFields=new Field[0]; |
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myLength=0; |
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} |
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|
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public int getRowId () { return myRowId; } |
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|
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public int getLen () { return myLength; } |
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|
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public Field getField ( int i ) { return myFields[i]; } |
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|
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public Field[] getFields () { |
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int len = getLen(); |
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Field[] clone = new Field[ len ]; |
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System.arraycopy( myFields, 0, clone, 0, len ); |
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return clone; |
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} |
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|
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public Field[] getFields(int offset,int len) { |
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Field[] clone=new Field[len]; |
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System.arraycopy(myFields,offset,clone,0,len); |
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return clone; |
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} |
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|
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|
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public boolean append(int tag,String value) { |
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return append(new Field(tag,value)); |
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} |
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|
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public boolean append(Field field) { |
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if (field==null) { |
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System.err.println("FIELD==null"); |
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field=new Field(0,""); |
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} |
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try { |
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if (myFields.length<=myLength) { |
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if (myFields.length<myLength) { |
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System.err.println("Rec.append:myFields.length<myLength !!! ("+myFields.length+","+myLength+")"); |
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myLength=myFields.length; |
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} |
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Field[] tfields=new Field[myLength+APPEND_LENGTH]; |
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System.arraycopy( myFields, 0, tfields, 0, myLength ); |
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myFields=tfields; |
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} |
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myFields[myLength]=field; |
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myLength++; |
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return true; |
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} catch(Exception e) { |
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e.printStackTrace(System.err); |
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return false; |
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} |
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} |
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|
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public boolean append(Field[] fields) { |
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//return false; |
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if (fields!=null && fields.length>0) { |
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for(int i=0;i<fields.length;i++) { |
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if (!append(fields[i])) return false; |
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} |
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} |
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return true; |
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} |
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|
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|
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public boolean wrap(Rec record,int tag) { |
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boolean ok=append(tag,""+record.getLen()); |
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if (!ok) return false; |
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return append(record.getFields()); |
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} |
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|
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public Rec unwrap(int tag) { |
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|
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return null; |
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} |
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|
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protected void set(int pos,Field f) { |
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if (myLength>pos) myFields[pos]=f; |
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} |
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|
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protected Field get(int pos) { |
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if (myLength>pos) return myFields[pos]; |
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else return null; |
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} |
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|
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/** the field selector. |
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format one or more occurences of a field to a StringBuffer, |
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mimicking the ISIS Vn-operator. |
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@param b the StringBuffer to fill |
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@param cpre conditional prefix: printed first, if anything is printed |
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@param rpre repeated prefix: printed before every occ |
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(but not the first, if mode include PP) |
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@param tag the field number (0 = all) |
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@param mode several mode bits as defined in Db + optional subfield char |
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@param occ a 16bit occ | end << 16. |
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if occ is 0, all occurences are printed. |
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if the end (higher bytes) are 0, only this occ is printed, |
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else all up to incl. end (use Db.LOCC for all). |
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@param len a 16bit length constraint | offset << 16 |
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this is passed to Field.v and applied for each occ. |
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@param rsuf repeated suffix: printed after every occ |
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(but not the last, if mode include PS) |
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@param csuf conditional suffix: printed last, if anything was printed |
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@return the number of formatted occurences |
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@see Field#v(StringBuffer,int,String,int) |
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*/ |
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public int v ( StringBuffer b, |
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String cpre, String rpre, |
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int tag, int mode, int occ, int len, |
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String rsuf, String csuf ) |
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{ |
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int end = occ >>> 16; occ &= 0xffff; |
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int o = 0; // occurences seen |
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int did = 0; // occurences done (after range and subfield selection) |
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int lrsuf = -1; // last pos of repeated suffix |
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|
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// data mode ending should not be used with suffix ? |
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// if ( null != rsuf || null != csuf ) mode &= ~Db.MD; |
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|
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// loop all fields |
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int flen=getLen(); |
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for ( int i=0; i<flen; i++ ) { |
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if ( 0 != tag && myFields[i].tag != tag ) |
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continue; |
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o++; // this is the oth occ, counting from 1 |
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System.err.println( "tag: "+tag+" occ: "+o ); |
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if ( 0 != occ ) // occ range limit |
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if ( o < occ ) |
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continue; |
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else if ( o > occ && o > end ) |
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break; |
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System.err.println( "in range"); |
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// seems we are in range |
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int l = b.length(); |
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if ( 0 == did && null != cpre ) |
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b.append( cpre ); |
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if ( null != rpre && (0<did || 0==(mode&Db.PP)) ) |
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b.append( rpre ); |
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boolean ok; |
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if ( 0 == ((Db.DS|Db.NS) & mode) ) // no dummy |
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ok = myFields[i].v( b, mode, len ); // really print it |
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else if ( 0 == (mode & 0xffff) || '*' == (mode & 0xffff) ) |
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ok = true; // no or 1st subfield |
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else { |
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char[] sf = new char[2]; |
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sf[0] = '^'; sf[1] = (char)(mode & 0xffff); |
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ok = 0 > myFields[i].val.indexOf( new String(sf) ); |
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if ( 0 != (Db.NS & mode) ) // the N absence dummy |
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ok = !ok; |
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} |
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if ( ! ok ) { |
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// subfield not found -- however, it counts as an field occ ... |
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// backup to where we were |
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b.delete( l, Integer.MAX_VALUE ); |
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continue; |
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} |
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did++; // gotcha |
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if ( null == rsuf ) |
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continue; |
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lrsuf = b.length(); |
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b.append( rsuf ); |
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} |
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if ( 0 <= lrsuf && 0 != (Db.PS & mode) ) // backup over lrsuf |
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b.delete( lrsuf, Integer.MAX_VALUE ); |
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if ( 0 != did && null != csuf ) |
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b.append( csuf ); |
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return did; |
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} // v |
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|
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/** format fields to a new StringBuffer, return it's content as String. |
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@return a new String or the String Db.EMPTY, iff no fields where done. |
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@see #v(StringBuffer,String,String,int,int,int,int,String,String) |
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*/ |
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public String v ( String cpre, String rpre, |
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int tag, int mode, int occ, int len, |
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String rsuf, String csuf ) |
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{ |
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StringBuffer b = new StringBuffer(); |
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return 0 < v( b, cpre, rpre, tag, mode, occ, len, rsuf, csuf ) |
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? b.toString() : Db.EMPTY; |
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} // v |
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|
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|
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/** format fields to a new StringBuffer, return it's content as String. |
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the conditional pre and suf are null here. |
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@return a new String or the String Db.EMPTY, iff no fields where done. |
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@see #v(StringBuffer,String,String,int,int,int,int,String,String) |
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*/ |
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public String v ( |
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String rpre, int tag, int mode, int occ, int len, String rsuf ) |
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{ |
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return v( null, rpre, tag, mode, occ, len, rsuf, null ); |
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} // v |
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|
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} // Rec |
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