/**
* Copyright (c) 2013, Institute of Information Systems (Sven Groppe and contributors of LUPOSDATE), University of Luebeck
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
* following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice, this list of conditions and the following
* disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other materials provided with the distribution.
* - Neither the name of the University of Luebeck nor the names of its contributors may be used to endorse or promote
* products derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package lupos.io;
import java.io.EOFException;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.Serializable;
import java.net.URISyntaxException;
import java.util.Collection;
import java.util.Comparator;
import java.util.LinkedList;
import java.util.SortedSet;
import java.util.TreeSet;
import lupos.datastructures.bindings.Bindings;
import lupos.datastructures.dbmergesortedds.DBMergeSortedMap;
import lupos.datastructures.dbmergesortedds.DBMergeSortedSet;
import lupos.datastructures.dbmergesortedds.DiskCollection;
import lupos.datastructures.dbmergesortedds.Entry;
import lupos.datastructures.dbmergesortedds.SortConfiguration;
import lupos.datastructures.items.Triple;
import lupos.datastructures.items.TripleKey;
import lupos.datastructures.smallerinmemorylargerondisk.SetImplementation;
import lupos.io.helper.InputHelper;
public class LuposObjectInputStream<E> extends ObjectInputStream {
public static final String UTF8 = "UTF-8";
public static final int LITERAL = 0;
public static final int URILITERAL = 1;
public static final int LANGUAGETAGGEDLITERAL = 2;
public static final int TYPEDLITERAL = 3;
public static final int ANONYMOUSLITERAL = 4;
public static final int LAZYLITERAL = 5;
public static final int LAZYLITERALMATERIALIZED = 6;
public static final int LAZYLITERALORIGINALCONTENT = 7;
public static final int LAZYLITERALORIGINALCONTENTMATERIALIZED = 8;
public static final int PLAINSTRINGLITERAL = 9;
public InputStream is;
protected Class<? extends E> classOfElements;
private final static int memoryLimit = 10000;
public LuposObjectInputStream() throws IOException {
}
public LuposObjectInputStream(final InputStream arg0, final Class<? extends E> classOfElements) throws IOException, EOFException {
super(arg0);
this.is = arg0;
this.classOfElements = classOfElements;
}
public E readLuposObject() throws IOException, ClassNotFoundException, URISyntaxException {
return Registration.deserializeWithoutId(this.classOfElements, this);
}
public <TT> TT readLuposObject(final Class classOfElements) throws IOException, ClassNotFoundException, URISyntaxException {
return (TT) Registration.deserializeWithoutId(classOfElements, this);
}
private Bindings previousBindings = null;
private Triple lastTriple = null;
// the last stored string as byte array...
protected byte[] lastString = null;
public Triple readLuposTriple() throws IOException, URISyntaxException, ClassNotFoundException {
this.lastTriple = InputHelper.readLuposTriple(this.lastTriple, this.is);
return this.lastTriple;
}
public TripleKey readLuposTripleKey() throws IOException, ClassNotFoundException {
// it is expected that the triple key contains the key computed from the
// last read triple
return InputHelper.readLuposTripleKey(this.lastTriple, this.is);
}
public String readLuposDifferenceString() throws IOException {
this.lastString = InputHelper.readLuposDifferenceString(this.lastString, this.is);
if(this.lastString==null){
return null;
} else {
return new String(this.lastString, LuposObjectInputStream.UTF8);
}
}
public Bindings readLuposBindings() throws IOException, ClassNotFoundException {
this.previousBindings = InputHelper.readLuposBindings(this.previousBindings, this.is);
return this.previousBindings;
}
@SuppressWarnings("rawtypes")
public DiskCollection readLuposDiskCollection() throws ClassNotFoundException, IOException {
return DiskCollection.readAndCreateLuposObject(this);
}
@SuppressWarnings({ "rawtypes", "unchecked" })
public Collection readLuposCollection() throws IOException, ClassNotFoundException {
final int size = this.is.read();
if (size == 255) {
return DiskCollection.readAndCreateLuposObject(this);
} else {
final LinkedList ll = new LinkedList();
final Class type = Registration.deserializeId(this)[0];
for (int i = 0; i < size; i++) {
try {
ll.add(Registration.deserializeWithoutId(type, this));
} catch (final URISyntaxException e) {
e.printStackTrace();
throw new IOException(e.getMessage());
}
}
return ll;
}
}
@SuppressWarnings({ "rawtypes", "unchecked" })
public E readLuposTreeSet() throws IOException, ClassNotFoundException {
final Comparator comparator = (Comparator) this.readObject();
final int size = InputHelper.readLuposInt(this.is);
if (size == 0) {
return (E) new TreeSet(comparator);
}
final Class c = Registration.deserializeId(this)[0];
final TreeSet ts = new TreeSet(comparator);
for (int i = 0; i < size; i++) {
try {
ts.add(Registration.deserializeWithoutId(c, this));
} catch (final URISyntaxException e) {
throw new IOException(e.getMessage());
}
}
return (E) ts;
}
@SuppressWarnings({ "rawtypes", "unchecked" })
public E readLuposSortedSet() throws IOException, ClassNotFoundException {
final Comparator comparator = (Comparator) this.readObject();
final int size = InputHelper.readLuposInt(this.is);
if (size < 0) {
return null;
}
if (size == 0){
final SortConfiguration sortConfiguration = new SortConfiguration();
sortConfiguration.useReplacementSelection(2, 2);
return (E) new DBMergeSortedSet(sortConfiguration, comparator, null);
}
final Class type = Registration.deserializeId(this)[0];
final SortedSet ms;
if (size < memoryLimit) {
if (type == Triple.class) {
ms = new TreeSet<Triple>(comparator);
} else {
ms = new TreeSet(comparator);
}
} else {
final SortConfiguration sortConfiguration = new SortConfiguration();
sortConfiguration.useReplacementSelection(2, 2);
if (type == Triple.class) {
ms = new DBMergeSortedSet(sortConfiguration, comparator, Triple.class);
} else {
ms = new DBMergeSortedSet(sortConfiguration, comparator, null);
}
}
for (int i = 0; i < size; i++) {
try {
ms.add(Registration.deserializeWithoutId(type, this));
} catch (final URISyntaxException e) {
throw new IOException(e.getMessage());
}
}
return (E) ms;
}
@SuppressWarnings({ "rawtypes", "unchecked" })
public SetImplementation readLuposSetImplementation() throws IOException, ClassNotFoundException {
final int size = InputHelper.readLuposInt(this.is);
if (size < 0){
return null;
}
final SetImplementation set = new SetImplementation();
if(size==0){
return set;
}
final Class type = Registration.deserializeId(this)[0];
for (int i = 0; i < size; i++) {
try {
set.add((Serializable)Registration.deserializeWithoutId(type, this));
} catch (final URISyntaxException e) {
throw new IOException(e.getMessage());
}
}
return set;
}
public E readLuposSortedMap() throws IOException, URISyntaxException, ClassNotFoundException {
final int type = InputHelper.readLuposByte(this.is);
if (type == 1) {
return this.readLuposDBMergeSortedMapBasic();
} else {
System.err.println("LuposObjectInputStream: Not supported!");
return null;
}
}
@SuppressWarnings({ "rawtypes", "unchecked" })
private E readLuposDBMergeSortedMapBasic() throws IOException, ClassNotFoundException {
final Comparator comparator = (Comparator) this.readObject();
final int size = InputHelper.readLuposInt(this.is);
if (size < 0) {
return null;
}
final SortConfiguration sortConfiguration = new SortConfiguration();
sortConfiguration.useReplacementSelection(2, 2);
final DBMergeSortedMap ms = new DBMergeSortedMap(sortConfiguration, comparator, null);
if (size == 0) {
return (E) ms;
}
final Class typeKey = Registration.deserializeId(this)[0];
final Class typeValue = Registration.deserializeId(this)[0];
for (int i = 0; i < size; i++) {
Serializable value;
Serializable key;
try {
value = (Serializable) Registration.deserializeWithoutId(typeValue, this);
key = (Serializable) Registration.deserializeWithoutId(typeKey, this);
ms.put(key, value);
} catch (final URISyntaxException e) {
System.out.println(e);
e.printStackTrace();
}
}
return (E) ms;
}
@SuppressWarnings("rawtypes")
public Entry readLuposEntry() throws ClassNotFoundException, IOException {
return InputHelper.readLuposEntry(this);
}
}