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/*
* 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.
*/
/*
* ===================== Java Helper Methods ==========================
* Defines helper methods in support of typemaps.
* These methods are placed in the respective module.
* ===================================================================
*/
%pragma(java) moduleimports=%{
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
%}
%pragma(java) modulecode=%{
/** Checks if the buffer passed is a direct buffer
* This method could also convert a non direct buffer into a direct buffer.
* However the extra copying deafeats the purpose of the binding.
*/
static protected java.nio.ByteBuffer isBufferDirect(java.nio.ByteBuffer buff)
{
if (buff.isDirect())
{
return buff;
}
else
{
throw new RuntimeException("The ByteBuffer passed is not allocated direct");
}
}
static protected void checkVariantMapKey(Object key)
{
if (key == null)
{
throw new NullPointerException("Key cannot be null");
}
if (! (key instanceof String))
{
throw new ClassCastException("Key should be of type java.lang.String");
}
}
static long getVariantMap(final Map<String,Object> m)
{
//optimizing for the null & empty map case.
if (m == null || m.size() == 0) { return 0; }
WriteOnlyVariantMapWrapper map = new WriteOnlyVariantMapWrapper();
for (String key: m.keySet())
{
map.put(key,m.get(key));
}
return WriteOnlyVariantMapWrapper.getCPtr(map);
}
static Map<String, Object> getJavaMap(final ReadOnlyVariantMapWrapper map)
{
if (map == null)
{
return Collections.emptyMap();
}
return new Map<String, Object>()
{
@Override
public int size()
{
return map.size();
}
@Override
public boolean isEmpty()
{
return map.isEmpty();
}
@Override
public boolean containsKey(Object key)
{
checkVariantMapKey(key);
return map.containsKey((String)key);
}
@Override
public boolean containsValue(Object value)
{
throw new UnsupportedOperationException("Unsupported at the native layer for efficiency");
}
@Override
public Object get(Object key)
{
checkVariantMapKey(key);
return map.get((String)key);
}
@Override
public Object put(String key, Object value)
{
throw new UnsupportedOperationException("This map is read-only");
}
@Override
public Object remove(Object key)
{
throw new UnsupportedOperationException("This map is read-only");
}
@Override
public void putAll(Map<? extends String, ? extends Object> m)
{
throw new UnsupportedOperationException("This map is read-only");
}
@Override
public void clear()
{
throw new UnsupportedOperationException("This map is read-only");
}
@Override
public Set<String> keySet()
{
Set<String> keys = new HashSet<String>();
for (String key:(String[])map.keys())
{
keys.add(key);
}
return keys;
}
@Override
public Collection<Object> values()
{
throw new UnsupportedOperationException("Unsupported at the native layer for efficiency");
}
@Override
public Set<Entry<String, Object>> entrySet()
{
Set<Entry<String, Object>> entries = new HashSet<Entry<String, Object>>();
for (final String key: keySet())
{
final Object value = map.get(key);
entries.add(new Entry<String, Object>()
{
@Override
public String getKey()
{
return key;
}
@Override
public Object getValue()
{
return value;
}
@Override
public Object setValue(Object value)
{
throw new UnsupportedOperationException("This set is read-only");
}
});
}
return entries;
}
};
}
%}
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