Spring/spring-integration
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Adding a slew of classes that can be genericized and then reused whole in the File, SFTP, and FTP adapters. This is experimental and may just as soon prove a dead end.

Browse Source
This commit is contained in:
Josh Long
2010-08-18 10:23:36 +00:00
parent b5556a664d
commit c22ccb1d26
6 changed files with 273 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

40
spring-integration-file/src/main/java/org/springframework/integration/file/entries/AbstractEntryListFilter.java Normal file
View File

@@ -0,0 +1,40 @@
/*
* Copyright 2002-2010 the original author or authors.
*
* Licensed 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 org.springframework.integration.file.entries;
import java.util.ArrayList;
import java.util.List;
public abstract class AbstractEntryListFilter<T> implements EntryListFilter<T> {
protected abstract boolean accept(T t);
public List<T> filterEntries(T[] entries) {
List<T> accepted = new ArrayList<T>();
if (entries != null) {
for (T t : entries) {
if (this.accept(t)) {
accepted.add(t);
}
}
}
return accepted;
}
}

61
spring-integration-file/src/main/java/org/springframework/integration/file/entries/AcceptOnceEntryFileListFilter.java Normal file
View File

@@ -0,0 +1,61 @@
/*
* Copyright 2002-2010 the original author or authors.
*
* Licensed 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 org.springframework.integration.file.entries;
import java.util.Queue;
import java.util.concurrent.LinkedBlockingQueue;
public class AcceptOnceEntryFileListFilter<T> extends AbstractEntryListFilter<T> {
private final Queue<T> seen;
private final Object monitor = new Object();
/**
* Creates an AcceptOnceFileFilter that is based on a bounded queue. If the
* queue overflows, files that fall out will be passed through this filter
* again if passed to the {@link #filterEntries(Object[])} method.
*
* @param maxCapacity the maximum number of Files to maintain in the 'seen'
* queue.
*/
public AcceptOnceEntryFileListFilter(int maxCapacity) {
this.seen = new LinkedBlockingQueue<T>(maxCapacity);
}
/**
* Creates an AcceptOnceFileFilter based on an unbounded queue.
*/
public AcceptOnceEntryFileListFilter() {
this.seen = new LinkedBlockingQueue<T>();
}
protected boolean accept(T pathname) {
synchronized (this.monitor) {
if (seen.contains(pathname)) {
return false;
}
if (!seen.offer(pathname)) {
seen.poll();
seen.add(pathname);
}
return true;
}
}
}

67
spring-integration-file/src/main/java/org/springframework/integration/file/entries/CompositeEntryListFilter.java Normal file
View File

@@ -0,0 +1,67 @@
/*
* Copyright 2002-2010 the original author or authors.
*
* Licensed 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 org.springframework.integration.file.entries;
import org.springframework.util.Assert;
import java.util.*;
public class CompositeEntryListFilter<T> implements EntryListFilter<T> {
private final Set<EntryListFilter> fileFilters;
public CompositeEntryListFilter(EntryListFilter... fileFilters) {
this.fileFilters = new LinkedHashSet<EntryListFilter>(Arrays.asList(fileFilters));
}
public CompositeEntryListFilter(Collection<EntryListFilter> fileFilters) {
this.fileFilters = new LinkedHashSet<EntryListFilter>(fileFilters);
}
@SuppressWarnings("unchecked")
public List<T> filterEntries(T[] entries) {
Assert.notNull(entries, "'files' should not be null");
List<T> leftOver = Arrays.asList(entries);
for (EntryListFilter fileFilter : this.fileFilters) {
T[] ts =(T[]) leftOver.toArray();
leftOver = fileFilter.filterEntries(ts);
}
return leftOver;
}
/**
* @param filters one or more new filters to add
* @return this CompositeFileFilter instance with the added filters
* @see #addFilters(Collection)
*/
public CompositeEntryListFilter addFilter(EntryListFilter... filters) {
return addFilters(Arrays.asList(filters));
}
/**
* Not thread safe. Only a single thread may add filters at a time.
* <p/>
* Add the new filters to this CompositeFileFilter while maintaining the existing filters.
*
* @param filtersToAdd a list of filters to add
* @return this CompositeEntryListFilter instance with the added filters
*/
public CompositeEntryListFilter addFilters(Collection<EntryListFilter> filtersToAdd) {
this.fileFilters.addAll(filtersToAdd);
return this;
}
}

23
spring-integration-file/src/main/java/org/springframework/integration/file/entries/EntryListFilter.java Normal file
View File

@@ -0,0 +1,23 @@
/*
* Copyright 2002-2010 the original author or authors.
*
* Licensed 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 org.springframework.integration.file.entries;
import java.util.List;
public interface EntryListFilter <T> {
List<T> filterEntries(T [] entries );
}

20
spring-integration-file/src/main/java/org/springframework/integration/file/entries/EntryNamer.java Normal file
View File

@@ -0,0 +1,20 @@
/*
* Copyright 2002-2010 the original author or authors.
*
* Licensed 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 org.springframework.integration.file.entries;
public interface EntryNamer<T> {
String nameOf(T entry);
}

62
spring-integration-file/src/main/java/org/springframework/integration/file/entries/PatternMatchingEntryListFilter.java Normal file
View File

@@ -0,0 +1,62 @@
/*
* Copyright 2002-2010 the original author or authors.
*
* Licensed 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 org.springframework.integration.file.entries;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.util.Assert;
import org.springframework.util.StringUtils;
import java.util.regex.Pattern;
/**
* experimental
*
* @author Josh Long
* @param <T> the type of entry
*/
public abstract class PatternMatchingEntryListFilter<T> extends AbstractEntryListFilter<T> implements InitializingBean {
private Pattern pattern;
private String patternExpression;
private EntryNamer<T> entryNamer;
public void setPattern(Pattern pattern) {
this.pattern = pattern;
}
public void setPatternExpression(String patternExpression) {
this.patternExpression = patternExpression;
}
public void afterPropertiesSet() throws Exception {
if (StringUtils.hasText(this.patternExpression) && (pattern == null)) {
this.pattern = Pattern.compile(this.patternExpression);
}
Assert.notNull(this.entryNamer,"'entryNamer' must not be null!");
Assert.notNull(this.pattern, "'pattern' mustn't be null!");
}
@Override
protected boolean accept(T t) {
return (t != null) && this.pattern.matcher(this.entryNamer.nameOf(t)).matches();
}
public void setEntryNamer(EntryNamer<T> entryNamer) {
this.entryNamer = entryNamer;
}
}