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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.
*
*/
package org.apache.qpid.transport;
import java.util.List;
import java.util.Map;
import org.apache.qpid.transport.codec.Decoder;
import org.apache.qpid.transport.codec.Encodable;
import org.apache.qpid.transport.codec.Encoder;
/**
* Struct
*
* @author Rafael H. Schloming
*/
public abstract class Struct implements Encodable
{
public static Struct create(int type)
{
return StructFactory.create(type);
}
boolean dirty = true;
public boolean isDirty()
{
return dirty;
}
public void setDirty(boolean dirty)
{
this.dirty = dirty;
}
public abstract int getStructType();
public abstract int getSizeWidth();
public abstract int getPackWidth();
public final int getEncodedType()
{
int type = getStructType();
if (type < 0)
{
throw new UnsupportedOperationException();
}
return type;
}
private final boolean isBit(Field<?,?> f)
{
return f.getType().equals(Boolean.class);
}
private final boolean packed()
{
return getPackWidth() > 0;
}
private final boolean encoded(Field<?,?> f)
{
return !packed() || !isBit(f) && f.has(this);
}
private final int getFlagWidth()
{
return (getFields().size() + 7)/8;
}
private final int getPaddWidth()
{
int pw = getPackWidth() - getFlagWidth();
assert pw > 0;
return pw;
}
private final int getFlagCount()
{
return 8*getPackWidth();
}
private final int getReservedFlagCount()
{
return getFlagCount() - getFields().size();
}
public abstract void read(Decoder dec);
public abstract void write(Encoder enc);
public abstract Map<String,Object> getFields();
public String toString()
{
StringBuilder str = new StringBuilder();
str.append(getClass().getSimpleName());
str.append("(");
boolean first = true;
for (Map.Entry<String,Object> me : getFields().entrySet())
{
if (first)
{
first = false;
}
else
{
str.append(", ");
}
str.append(me.getKey());
str.append("=");
str.append(me.getValue());
}
str.append(")");
return str.toString();
}
}
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