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package org.apache.velocity.util.introspection;
/*
* 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.
*/
import java.util.Iterator;
/**
* Default implementation of a {@link ChainableUberspector chainable uberspector} that forwards all calls to the wrapped
* uberspector (when that is possible). It should be used as the base class for all chainable uberspectors.
*
* @version $Id: $
* @since 1.6
* @see ChainableUberspector
*/
public abstract class AbstractChainableUberspector extends UberspectImpl implements ChainableUberspector
{
/** The wrapped (decorated) uberspector. */
protected Uberspect inner;
/**
* {@inheritDoc}
*
* @see ChainableUberspector#wrap(org.apache.velocity.util.introspection.Uberspect)
* @see #inner
*/
@Override
public void wrap(Uberspect inner)
{
this.inner = inner;
}
/**
* init - the chainable uberspector is responsible for the initialization of the wrapped uberspector
*
* @see org.apache.velocity.util.introspection.Uberspect#init()
*/
//@Override
@Override
public void init()
{
if (this.inner != null) {
try {
this.inner.init();
} catch (Exception e) {
log.error(e.getMessage(), e);
this.inner = null;
}
}
}
/**
* {@inheritDoc}
*
* @see org.apache.velocity.util.introspection.Uberspect#getIterator(java.lang.Object,
* org.apache.velocity.util.introspection.Info)
*/
//@SuppressWarnings("unchecked")
//@Override
@Override
public Iterator getIterator(Object obj, Info i)
{
return (this.inner != null) ? this.inner.getIterator(obj, i) : null;
}
/**
* {@inheritDoc}
*
* @see org.apache.velocity.util.introspection.Uberspect#getMethod(java.lang.Object, java.lang.String,
* java.lang.Object[], org.apache.velocity.util.introspection.Info)
*/
//@Override
@Override
public VelMethod getMethod(Object obj, String methodName, Object[] args, Info i)
{
return (this.inner != null) ? this.inner.getMethod(obj, methodName, args, i) : null;
}
/**
* {@inheritDoc}
*
* @see org.apache.velocity.util.introspection.Uberspect#getPropertyGet(java.lang.Object, java.lang.String,
* org.apache.velocity.util.introspection.Info)
*/
//@Override
@Override
public VelPropertyGet getPropertyGet(Object obj, String identifier, Info i)
{
return (this.inner != null) ? this.inner.getPropertyGet(obj, identifier, i) : null;
}
/**
* {@inheritDoc}
*
* @see org.apache.velocity.util.introspection.Uberspect#getPropertySet(java.lang.Object, java.lang.String,
* java.lang.Object, org.apache.velocity.util.introspection.Info)
*/
//@Override
@Override
public VelPropertySet getPropertySet(Object obj, String identifier, Object arg, Info i)
{
return (this.inner != null) ? this.inner.getPropertySet(obj, identifier, arg, i) : null;
}
}
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