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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.qmf2.common;
// Misc Imports
import java.util.Map;
import java.util.UUID;
/**
* Schema are identified by a combination of their package name and class name. A hash value over the body of
* the schema provides a revision identifier. The class SchemaClassId represents this Schema identifier.
* <p>
* If the hash value is not supplied, then the value of the hash string will be set to None. This will be the
* case when a SchemaClass is being dynamically constructed, and a proper hash is not yet available.
*
* @author Fraser Adams
*/
public final class SchemaClassId extends QmfData
{
private String _packageName = "";
private String _className = "";
private String _type = "";
private UUID _hash = null;
/**
* The main constructor, taking a java.util.Map as a parameter.
*
* @param m the map used to construct the SchemaClassId.
*/
public SchemaClassId(final Map m)
{
super(m);
_packageName = getStringValue("_package_name");
_className = getStringValue("_class_name");
_type = getStringValue("_type");
_hash = hasValue("_hash") ? (UUID)getValue("_hash") : null;
}
/**
* Construct a SchemaClassId from a given class name.
*
* @param className the class name.
*/
public SchemaClassId(final String className)
{
this(null, className, null, null);
}
/**
* Construct a SchemaClassId from a given package name and class name.
*
* @param packageName the package name.
* @param className the class name.
*/
public SchemaClassId(final String packageName, final String className)
{
this(packageName, className, null, null);
}
/**
* Construct a SchemaClassId from a given package name and class name and type (_data or _event).
*
* @param packageName the package name.
* @param className the class name.
* @param type the schema type (_data or _event).
*/
public SchemaClassId(final String packageName, final String className, final String type)
{
this(packageName, className, type, null);
}
/**
* Construct a SchemaClassId from a given package name and class name, type (_data or _event) and hash.
*
* @param packageName the package name.
* @param className the class name.
* @param type the schema type (_data or _event).
* @param hash a UUID representation of the md5 hash of the Schema,
*/
public SchemaClassId(final String packageName, final String className, final String type, final UUID hash)
{
if (packageName != null)
{
setValue("_package_name", packageName);
_packageName = packageName;
}
if (className != null)
{
setValue("_class_name", className);
_className = className;
}
if (type != null)
{
setValue("_type", type);
_type = type;
}
if (hash != null)
{
setValue("_hash", hash);
_hash = hash;
}
}
/**
* Return The name of the associated package.
* @return The name of the associated package. Returns empty String if there's no package name.
*/
public String getPackageName()
{
return _packageName;
}
/**
* Return The name of the class within the package.
* @return The name of the class within the package. Returns empty String if there's no class name.
*/
public String getClassName()
{
return _className;
}
/**
* Return The type of schema, either "_data" or "_event".
* @return The type of schema, either "_data" or "_event". Returns empty String if type is unknown.
*/
public String getType()
{
return _type;
}
/**
* Return The MD5 hash of the schema.
* @return The MD5 hash of the schema, in the format "%08x-%08x-%08x-%08x"
*/
public UUID getHashString()
{
return _hash;
}
/**
* Compares two SchemaClassId objects for equality.
* @param rhs the right hands side SchemaClassId in the comparison.
* @return true if the two SchemaClassId objects are equal otherwise returns false.
*/
@Override
public boolean equals(final Object rhs)
{
if (rhs instanceof SchemaClassId)
{
SchemaClassId that = (SchemaClassId)rhs;
String lvalue = _packageName + _className + _hash;
String rvalue = that._packageName + that._className + that._hash;
return lvalue.equals(rvalue);
}
return false;
}
/**
* Returns the SchemaClassId hashCode.
* @return the SchemaClassId hashCode.
*/
@Override
public int hashCode()
{
String lvalue = _packageName + _className + _hash;
return lvalue.hashCode();
}
/**
* Helper/debug method to list the QMF Object properties and their type.
*/
@Override
public void listValues()
{
System.out.println("_package_name: " + getPackageName());
System.out.println("_class_name: " + getClassName());
System.out.println("_type: " + getType());
System.out.println("_hash: " + getHashString());
}
}
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