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00029 package org.openmobileis.database.fastobjectdb.db.index;
00030
00031 import java.io.IOException;
00032 import java.lang.reflect.*;
00033 import org.openmobileis.common.util.collection.*;
00034 import org.openmobileis.database.fastobjectdb.FODBIndexDescriptor;
00035 import org.openmobileis.database.fastobjectdb.FODBStringIndexDescriptor;
00036 import org.openmobileis.database.fastobjectdb.db.exception.FODBException;
00037 import org.openmobileis.database.fastobjectdb.db.index.node.*;
00038 import org.openmobileis.database.fastobjectdb.db.query.soda.BaseConstraint;
00039 import org.openmobileis.database.fastobjectdb.db.query.soda.SodaStringIndexComparator;
00040 import org.openmobileis.database.fastobjectdb.db.store.*;
00041
00044 public class FODBUniqueStringIndex extends FODBStringIndex implements FODBUniqueIndex {
00045
00046 public FODBUniqueStringIndex(FODBIndexHeader newHeader, FODBCollectionIndexFile cFile, AccessibleObject accObj) throws FODBException {
00047 super(newHeader, cFile, accObj);
00048 }
00049
00050 public FODBUniqueStringIndex(FODBStringIndexDescriptor descriptor, FODBCollectionIndexFile cFile, AccessibleObject accObj) throws FODBException {
00051 super(descriptor, cFile, accObj);
00052 }
00053
00054 public int getType() {
00055 return FODBIndex.UNIQUE;
00056 }
00057
00058 protected void writeKeyPtr(Node node, int pos, long newptr) throws IOException, ClassNotFoundException {
00059 throw new IOException("rewrite unique String index Ptr not allowed");
00060 }
00061
00062
00063
00064
00065
00066
00067 protected void addSearchResult(StringNode node, int pos, LongArray array, SodaStringIndexComparator comparator) throws IOException, ClassNotFoundException {
00068 array.add(node.getNodePtrAtPos(pos));
00069 }
00070
00071
00072
00073 public long getKeyPosition(Object keytosearch) throws FODBException {
00074 if (keytosearch == null) {
00075 return Node.NO_NODE;
00076 }
00077 if (!(keytosearch instanceof String)) {
00078 throw new FODBException("Key type in getKeyPosition for StringUniqueIndex");
00079 }
00080 String key = (String) keytosearch;
00081 if (key.length() == 0) {
00082 return Node.NO_NODE;
00083 }
00084
00085 try {
00086 SodaStringIndexComparator comparator = new SodaStringIndexComparator(((FODBStringIndexDescriptor)this.getIndexDescriptor()).isCaseSensitive());
00087 comparator.setOperand(key);
00088 comparator.addComparator(BaseConstraint.EQUALS);
00089 long preResult[] = this.query(comparator);
00090
00091 if (preResult == null) {
00092 throw new FODBException("Internal error !!!");
00093 }
00094 if (preResult.length > 1) {
00095 throw new FODBException("Internal error !!!");
00096 }
00097
00098 if (preResult.length == 0) {
00099 return Node.NO_NODE;
00100 }
00101
00102
00103 return preResult[0];
00104 } catch (Throwable ex) {
00105 throw new FODBException(ex);
00106 }
00107 }
00108
00109 protected boolean removeKeyPtr(Node pg, int pos, long pointer) throws IOException, ClassNotFoundException {
00110 return true;
00111 }
00112
00113 public FODBIndexDescriptor getIndexDescriptor() {
00114 return new FODBStringIndexDescriptor(this.header.getName(), FODBIndexDescriptor.UNIQUE, this.header.getMemberName(), this.header.order, this.header.keyLen);
00115 }
00116
00117 }