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Posted to commits@xmlgraphics.apache.org by ac...@apache.org on 2008/08/04 11:38:03 UTC
svn commit: r682305 - in /xmlgraphics/commons/trunk: ./
src/java/org/apache/xmlgraphics/store/
Author: acumiskey
Date: Mon Aug 4 02:38:02 2008
New Revision: 682305
URL: http://svn.apache.org/viewvc?rev=682305&view=rev
Log:
Added the new org.apache.xmlgraphics.store package to provide temporary storage features.
Added:
xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/
xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/FileStore.java (with props)
xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/InputStreamStorer.java (with props)
xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/StoreRecord.java (with props)
xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/Storer.java (with props)
xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/Writable.java (with props)
xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/WritableStorer.java (with props)
xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/WriteSession.java (with props)
Modified:
xmlgraphics/commons/trunk/status.xml
Added: xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/FileStore.java
URL: http://svn.apache.org/viewvc/xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/FileStore.java?rev=682305&view=auto
==============================================================================
--- xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/FileStore.java (added)
+++ xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/FileStore.java Mon Aug 4 02:38:02 2008
@@ -0,0 +1,166 @@
+/*
+ * 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.
+ */
+
+/* $Id$ */
+
+package org.apache.xmlgraphics.store;
+
+import java.io.File;
+import java.io.FileDescriptor;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.RandomAccessFile;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.apache.xmlgraphics.image.loader.ImageManager;
+
+/**
+ * A useful class which is able to easily store and retrieve large resources (such as images)
+ */
+public class FileStore {
+
+ /** logger */
+ protected static Log log = LogFactory.getLog(ImageManager.class);
+
+ /** Internal temporary storage buffer size */
+ private static final int BUFFER_SIZE = 4096;
+
+ /** Used for storage of data objects */
+ protected RandomAccessFile raFile;
+
+ /** The temporary cache file */
+ private File tempFile;
+
+ /** The file outputstream */
+ protected FileOutputStream fos;
+
+ /**
+ * Default constructor
+ *
+ * @param prefix file store prefix
+ */
+ public FileStore(String prefix) {
+ try {
+ this.tempFile = File.createTempFile(prefix, null);
+ this.raFile = new RandomAccessFile(tempFile, "rw");
+ FileDescriptor fd = raFile.getFD();
+ this.fos = new FileOutputStream(fd);
+ } catch (IOException e) {
+ // TODO
+ log.error(e.getMessage());
+ }
+ }
+
+ /**
+ * Clears the resource store.
+ *
+ * @throws IOException if an error occurs while clearing the store
+ */
+ public void clear() throws IOException {
+ if (tempFile != null) {
+ raFile.close();
+ raFile = null;
+ fos = null;
+ if (tempFile.exists() && !tempFile.delete()) {
+ throw new IOException("Could not delete temporary file: " + tempFile);
+ }
+ tempFile = null;
+ }
+ }
+
+ /** {@inheritDoc} */
+ public void finalize() throws Throwable {
+ try {
+ clear();
+ } finally {
+ super.finalize();
+ }
+ }
+
+ /**
+ * Returns the storer of a given object
+ *
+ * @param object an object to be stored
+ * @return a storer of the object
+ */
+ protected Storer getStorer(Object object) {
+ Storer storer;
+ if (object instanceof Writable) {
+ storer = new WritableStorer(this, (Writable)object);
+ } else if (object instanceof InputStream) {
+ storer = new InputStreamStorer(this, (InputStream)object);
+ } else {
+ throw new IllegalArgumentException("Unsupported object " + object);
+ }
+ return storer;
+ }
+
+ /**
+ * Stores an object in the cache
+ *
+ * @param object the object to store
+ * @return a new save information record
+ *
+ * @throws java.io.IOException an I/O exception of some sort has occurred.
+ */
+ public StoreRecord write(Object object) throws IOException {
+ return getStorer(object).store();
+ }
+
+ /**
+ * Reads all the data from a given store information record
+ * and returns it in a byte array.
+ * This is potentially a memory hungry operation so use with care.
+ *
+ * @param storeInfo a store information record
+ * @return the stored data in a byte array.
+ * @throws java.io.IOException an I/O exception of some sort has occurred.
+ */
+ public byte[] read(StoreRecord storeInfo) throws IOException {
+ raFile.seek(storeInfo.position);
+ byte[] buff = new byte[storeInfo.size];
+ raFile.read(buff);
+ return buff;
+ }
+
+ /**
+ * Writes out the resource in full using the store information to the given outputstream.
+ *
+ * @param storeInfo the save information
+ * @param os the outputstream to write to
+ *
+ * @throws java.io.IOException an I/O exception of some sort has occurred.
+ */
+ public void writeToStream(StoreRecord storeInfo, OutputStream os) throws IOException {
+ if (storeInfo == null) {
+ throw new IllegalArgumentException("save is null");
+ }
+ double chunkCount = storeInfo.size / BUFFER_SIZE;
+ byte[] buffer = new byte[BUFFER_SIZE];
+ raFile.seek(storeInfo.position);
+ for (int cnt = 0; cnt < chunkCount; cnt++) {
+ raFile.read(buffer, 0, BUFFER_SIZE);
+ os.write(buffer, 0, BUFFER_SIZE);
+ }
+ int lastChunkLength = storeInfo.size % BUFFER_SIZE;
+ raFile.read(buffer, 0, lastChunkLength);
+ os.write(buffer, 0, lastChunkLength);
+ }
+}
Propchange: xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/FileStore.java
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Added: xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/InputStreamStorer.java
URL: http://svn.apache.org/viewvc/xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/InputStreamStorer.java?rev=682305&view=auto
==============================================================================
--- xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/InputStreamStorer.java (added)
+++ xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/InputStreamStorer.java Mon Aug 4 02:38:02 2008
@@ -0,0 +1,31 @@
+package org.apache.xmlgraphics.store;
+
+import java.io.IOException;
+import java.io.InputStream;
+
+import org.apache.commons.io.IOUtils;
+
+/**
+ * Storer of InputStreams
+ */
+public final class InputStreamStorer extends Storer {
+
+ /** an inputstream */
+ private final InputStream in;
+
+ /**
+ * Constructor
+ *
+ * @param store our resource store
+ * @param in an inputstream
+ */
+ protected InputStreamStorer(FileStore store, InputStream in) {
+ super(store);
+ this.in = in;
+ }
+
+ /** {@inheritDoc} */
+ protected void doStore() throws IOException {
+ IOUtils.copy(in, store.fos);
+ }
+}
\ No newline at end of file
Propchange: xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/InputStreamStorer.java
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Added: xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/StoreRecord.java
URL: http://svn.apache.org/viewvc/xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/StoreRecord.java?rev=682305&view=auto
==============================================================================
--- xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/StoreRecord.java (added)
+++ xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/StoreRecord.java Mon Aug 4 02:38:02 2008
@@ -0,0 +1,90 @@
+/*
+ * 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.
+ */
+
+/* $Id$ */
+
+package org.apache.xmlgraphics.store;
+
+import java.io.IOException;
+import java.io.OutputStream;
+
+/**
+ * Store save information
+ */
+public class StoreRecord {
+
+ /** the resource store associated with this store information */
+ private final FileStore store;
+
+ /** data position */
+ protected long position;
+
+ /** data chunk size */
+ protected int size;
+
+ /**
+ * Main constructor
+ *
+ * @param store our resource store
+ */
+ public StoreRecord(FileStore store) {
+ this.store = store;
+ }
+
+ /**
+ * Returns the storage position
+ *
+ * @return the storage position
+ */
+ public long getPosition() {
+ return this.position;
+ }
+
+ /**
+ * Returns the storage size
+ *
+ * @return the storage size
+ */
+ public int getLength() {
+ return this.size;
+ }
+
+ /**
+ * Returns the resource store associated with this store record
+ *
+ * @return the resource store associated with this store record
+ */
+ public FileStore getStore() {
+ return this.store;
+ }
+
+ /**
+ * Convenience method used to writes the data referenced
+ * by this storage record to an outputstream
+ *
+ * @param os the outputstream to write to
+ * @throws java.io.IOException an I/O exception of some sort has occurred.
+ */
+ public void writeToStream(OutputStream os) throws IOException {
+ store.writeToStream(this, os);
+ }
+
+ /** {@inheritDoc} */
+ public String toString() {
+ return "pos=" + position + ", size=" + size;
+ }
+}
\ No newline at end of file
Propchange: xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/StoreRecord.java
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svn:keywords = Revision Id
Added: xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/Storer.java
URL: http://svn.apache.org/viewvc/xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/Storer.java?rev=682305&view=auto
==============================================================================
--- xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/Storer.java (added)
+++ xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/Storer.java Mon Aug 4 02:38:02 2008
@@ -0,0 +1,87 @@
+/*
+ * 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.
+ */
+
+/* $Id$ */
+
+package org.apache.xmlgraphics.store;
+
+import java.io.IOException;
+
+/**
+ * Base storer class
+ */
+public class Storer {
+
+ /** write session */
+ protected final WriteSession session;
+
+ /** file store */
+ protected final FileStore store;
+
+ /**
+ * Constructor
+ *
+ * @param store our resource store
+ */
+ public Storer(FileStore store) {
+ this.store = store;
+ this.session = new WriteSession(this);
+ }
+
+ /**
+ * Instantiates the store information record
+ *
+ * @return a new store information record
+ */
+ protected StoreRecord createRecord() {
+ return new StoreRecord(store);
+ }
+
+ /**
+ * Stores the object
+ *
+ * @return a store information record
+ * @throws IOException thrown if an I/O exception of some sort has occurred.
+ */
+ public StoreRecord store() throws IOException {
+ StoreRecord record = null;
+ session.begin();
+ try {
+ doStore();
+ } finally {
+ record = session.end();
+ }
+ return record;
+ }
+
+ /**
+ * Actually performs the store operation
+ *
+ * @throws IOException thrown if an I/O exception of some sort has occurred.
+ */
+ protected void doStore() throws IOException {
+ }
+
+ /**
+ * Returns the file store associated with this storer
+ *
+ * @return the file store associated with this storer
+ */
+ protected FileStore getStore() {
+ return store;
+ }
+}
Propchange: xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/Storer.java
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Added: xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/Writable.java
URL: http://svn.apache.org/viewvc/xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/Writable.java?rev=682305&view=auto
==============================================================================
--- xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/Writable.java (added)
+++ xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/Writable.java Mon Aug 4 02:38:02 2008
@@ -0,0 +1,38 @@
+/*
+ * 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.
+ */
+
+/* $Id$ */
+
+package org.apache.xmlgraphics.store;
+
+import java.io.IOException;
+import java.io.OutputStream;
+
+/**
+ * Implementing object is able to write to an OutputStream
+ */
+public interface Writable {
+
+ /**
+ * DataStream objects must implement the writeToStream()
+ * method to write its data to the given OutputStream
+ *
+ * @param outputStream The outputsteam stream
+ * @throws java.io.IOException an I/O exception of some sort has occurred.
+ */
+ void writeToStream(OutputStream outputStream) throws IOException;
+}
Propchange: xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/Writable.java
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Added: xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/WritableStorer.java
URL: http://svn.apache.org/viewvc/xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/WritableStorer.java?rev=682305&view=auto
==============================================================================
--- xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/WritableStorer.java (added)
+++ xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/WritableStorer.java Mon Aug 4 02:38:02 2008
@@ -0,0 +1,47 @@
+/*
+ * 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.
+ */
+
+/* $Id$ */
+
+package org.apache.xmlgraphics.store;
+
+import java.io.IOException;
+
+/**
+ * Storer of objects that implement the Writable interface
+ */
+public class WritableStorer extends Storer {
+
+ /** a Writable object */
+ protected final Writable writable;
+
+ /**
+ * Constructor
+ *
+ * @param store our resource store
+ * @param writable an object implementing the Writable interface
+ */
+ public WritableStorer(FileStore store, Writable writable) {
+ super(store);
+ this.writable = writable;
+ }
+
+ /** {@inheritDoc} */
+ protected void doStore() throws IOException {
+ writable.writeToStream(store.fos);
+ }
+}
Propchange: xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/WritableStorer.java
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Added: xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/WriteSession.java
URL: http://svn.apache.org/viewvc/xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/WriteSession.java?rev=682305&view=auto
==============================================================================
--- xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/WriteSession.java (added)
+++ xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/WriteSession.java Mon Aug 4 02:38:02 2008
@@ -0,0 +1,109 @@
+/*
+ * 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.
+ */
+
+/* $Id$ */
+
+package org.apache.xmlgraphics.store;
+
+import java.io.IOException;
+import java.io.OutputStream;
+
+/**
+ * A Write session
+ */
+public class WriteSession {
+ /** true if the session output was flushed */
+ protected boolean flushed = false;
+
+ /** the session storer */
+ private final Storer storer;
+
+ /** the storer's file store */
+ private final FileStore store;
+
+ /** the store information record */
+ protected StoreRecord record;
+
+ /**
+ * Constructor
+ *
+ * @param store our store
+ */
+ public WriteSession(FileStore store) {
+ this.storer = new Storer(store);
+ this.store = store;
+ }
+
+ /**
+ * Constructor
+ *
+ * @param storer our storer
+ */
+ public WriteSession(Storer storer) {
+ this.storer = storer;
+ this.store = storer.getStore();
+ }
+
+ /**
+ * Begins the session
+ *
+ * @throws IOException thrown if an I/O exception of some sort has occurred.
+ */
+ public void begin() throws IOException {
+ // always write to the end of the store
+ long length = store.raFile.length();
+ if (store.raFile.getFilePointer() < length) {
+ store.raFile.seek(length);
+ }
+
+ this.record = storer.createRecord();
+ record.position = store.raFile.getFilePointer();
+ }
+
+ /**
+ * Ends the session
+ *
+ * @return a new store information record
+ * @throws IOException thrown if an I/O exception of some sort has occurred.
+ */
+ public StoreRecord end() throws IOException {
+ if (!flushed) {
+ store.fos.flush();
+ flushed = true;
+ }
+ record.size = (int)(store.raFile.getFilePointer() - record.position);
+ return record;
+ }
+
+ /**
+ * Returns the outputstream of this store
+ *
+ * @return the outputstream of this store
+ */
+ public OutputStream getOutputStream() {
+ return store.fos;
+ }
+
+ /**
+ * Returns the store record
+ *
+ * @return the store record
+ */
+ public StoreRecord getRecord() {
+ return record;
+ }
+}
\ No newline at end of file
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Modified: xmlgraphics/commons/trunk/status.xml
URL: http://svn.apache.org/viewvc/xmlgraphics/commons/trunk/status.xml?rev=682305&r1=682304&r2=682305&view=diff
==============================================================================
--- xmlgraphics/commons/trunk/status.xml (original)
+++ xmlgraphics/commons/trunk/status.xml Mon Aug 4 02:38:02 2008
@@ -40,6 +40,9 @@
</contexts>
<changes>
<release version="Trunk" date="n/a">
+ <action context="Code" dev="AC" type="add">
+ Added the new org.apache.xmlgraphics.store package to provide temporary storage features.
+ </action>
<action context="Code" dev="JM" type="fix">
Bugfix: Added missing start/endPrefixMapping() calls when serializing XMP packets.
</action>
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Re: svn commit: r682305 - in /xmlgraphics/commons/trunk: ./ src/java/org/apache/xmlgraphics/store/
Posted by Jeremias Maerki <de...@jeremias-maerki.ch>.
Sorry Adrian, but I'm -1 on that commit. You barely left the weekend to
react on your proposal. IMO, XGC is not the right place for this. I
don't see a high reusability factor in this code, it has very little to
do with XML and graphics and it is only used by one component inside FOP.
I don't see that Batik will ever need this package. Will reply in to
your proposal as well.
On 04.08.2008 11:38:03 acumiskey wrote:
> Author: acumiskey
> Date: Mon Aug 4 02:38:02 2008
> New Revision: 682305
>
> URL: http://svn.apache.org/viewvc?rev=682305&view=rev
> Log:
> Added the new org.apache.xmlgraphics.store package to provide temporary storage features.
>
> Added:
> xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/
> xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/FileStore.java (with props)
> xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/InputStreamStorer.java (with props)
> xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/StoreRecord.java (with props)
> xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/Storer.java (with props)
> xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/Writable.java (with props)
> xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/WritableStorer.java (with props)
> xmlgraphics/commons/trunk/src/java/org/apache/xmlgraphics/store/WriteSession.java (with props)
> Modified:
> xmlgraphics/commons/trunk/status.xml
<snip/>
Jeremias Maerki
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