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TIBCO ComputeDB store based off Pivotal GemFireXD
/*
Derby - Class com.pivotal.gemfirexd.internal.iapi.services.classfile.MemberTable
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF 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.pivotal.gemfirexd.internal.iapi.services.classfile;
import java.io.IOException;
import java.util.Hashtable;
import java.util.Vector;
class MemberTable {
protected Vector entries;
private Hashtable hashtable;
private MemberTableHash mutableMTH = null;
public MemberTable(int count) {
entries = new Vector(count);
hashtable = new Hashtable((count > 50) ? count : 50);
mutableMTH = new MemberTableHash(null, null);
}
void addEntry(ClassMember item) {
MemberTableHash mth= new MemberTableHash(
item.getName(),
item.getDescriptor(),
entries.size());
/* Add to the Vector */
entries.addElement(item);
/* Add to the Hashtable */
hashtable.put(mth, mth);
}
ClassMember find(String name, String descriptor) {
/* Set up the mutable MTH for the search */
mutableMTH.name = name;
mutableMTH.descriptor = descriptor;
mutableMTH.setHashCode();
/* search the hash table */
MemberTableHash mth = (MemberTableHash) hashtable.get(mutableMTH);
if (mth == null)
{
return null;
}
return (ClassMember) entries.elementAt(mth.index);
}
void put(ClassFormatOutput out) throws IOException {
Vector lentries = entries;
int count = lentries.size();
for (int i = 0; i < count; i++) {
((ClassMember) lentries.elementAt(i)).put(out);
}
}
int size() {
return entries.size();
}
int classFileSize() {
int size = 0;
Vector lentries = entries;
int count = lentries.size();
for (int i = 0; i < count; i++) {
size += ((ClassMember) lentries.elementAt(i)).classFileSize();
}
return size;
}
}
class MemberTableHash
{
String name;
String descriptor;
int index;
int hashCode;
MemberTableHash(String name, String descriptor, int index)
{
this.name = name;
this.descriptor = descriptor;
this.index = index;
/* Only set hashCode if both name and descriptor are non-null */
if (name != null && descriptor != null)
{
setHashCode();
}
}
MemberTableHash(String name, String descriptor)
{
this(name, descriptor, -1);
}
void setHashCode()
{
hashCode = name.hashCode() + descriptor.hashCode();
}
public boolean equals(Object other)
{
MemberTableHash mth = (MemberTableHash) other;
if (other == null)
{
return false;
}
if (name.equals(mth.name) && descriptor.equals(mth.descriptor))
{
return true;
}
else
{
return false;
}
}
public int hashCode()
{
return hashCode;
}
}