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Diffstat (limited to 'velocity-engine-core/src/main/java/org/apache/velocity/util/introspection/AbstractChainableUberspector.java')
-rw-r--r-- | velocity-engine-core/src/main/java/org/apache/velocity/util/introspection/AbstractChainableUberspector.java | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/velocity-engine-core/src/main/java/org/apache/velocity/util/introspection/AbstractChainableUberspector.java b/velocity-engine-core/src/main/java/org/apache/velocity/util/introspection/AbstractChainableUberspector.java new file mode 100644 index 00000000..ea722be8 --- /dev/null +++ b/velocity-engine-core/src/main/java/org/apache/velocity/util/introspection/AbstractChainableUberspector.java @@ -0,0 +1,120 @@ +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; + } +} |