org.apache.struts2.views.velocity.StrutsVelocityContext Maven / Gradle / Ivy
/*
* 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.struts2.views.velocity;
import com.opensymphony.xwork2.util.ValueStack;
import org.apache.velocity.VelocityContext;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
public class StrutsVelocityContext extends VelocityContext {
private final ValueStack stack;
private final List chainedContexts;
/**
* Creates a content with link to the ValueStack and any other Velocity contexts
*
* @param chainedContexts Existing Velocity contexts to chain to
* @param stack Struts ValueStack
* @since 6.0.0
*/
public StrutsVelocityContext(List chainedContexts, ValueStack stack) {
this.chainedContexts = chainedContexts;
this.stack = stack;
}
/**
* @deprecated please use {@link #StrutsVelocityContext(List, ValueStack)}
* and pass {null} or empty list if no chained contexts were defined
*/
@Deprecated
public StrutsVelocityContext(ValueStack stack) {
this((List) null, stack);
}
/**
* @deprecated please use {@link #StrutsVelocityContext(List, ValueStack)}
*/
@Deprecated()
public StrutsVelocityContext(VelocityContext[] chainedContexts, ValueStack stack) {
this(new ArrayList<>(Arrays.asList(chainedContexts)), stack);
}
public boolean internalContainsKey(String key) {
return internalGet(key) != null;
}
public Object internalGet(String key) {
Object val = super.internalGet(key);
if (val != null) {
return val;
}
if (stack != null) {
val = stack.findValue(key);
if (val != null) {
return val;
}
val = stack.getContext().get(key);
if (val != null) {
return val;
}
}
if (chainedContexts != null) {
for (VelocityContext chainedContext : chainedContexts) {
val = chainedContext.internalGet(key);
if (val != null) {
return val;
}
}
}
return null;
}
}