public class DefaultContext extends java.lang.Object implements Context
Constructor and Description |
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DefaultContext()
Create a Context with no parent.
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DefaultContext(Context parent)
Create a Context with specified parent.
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DefaultContext(java.util.Map contextData)
Create a Context with specified data.
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DefaultContext(java.util.Map contextData,
Context parent)
Create a Context with specified data and parent.
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Modifier and Type | Method and Description |
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protected void |
checkWriteable()
Utility method to check if context is writeable and if not throw exception.
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java.lang.Object |
get(java.lang.Object key)
Retrieve an item from the Context.
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protected java.util.Map |
getContextData()
Utility method to retrieve context data.
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protected Context |
getParent()
Get parent context if any.
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void |
hide(java.lang.Object key)
Hides the item in the context.
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void |
makeReadOnly()
Make the context read-only.
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void |
put(java.lang.Object key,
java.lang.Object value)
Helper method fo adding items to Context.
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public DefaultContext(java.util.Map contextData, Context parent)
contextData
- the context dataparent
- the parent Context (may be null)public DefaultContext(java.util.Map contextData)
contextData
- the context datapublic DefaultContext(Context parent)
parent
- the parent Context (may be null)public DefaultContext()
public java.lang.Object get(java.lang.Object key) throws ContextException
get
in interface Context
key
- the key of itemContextException
- if item not presentpublic void put(java.lang.Object key, java.lang.Object value) throws java.lang.IllegalStateException
key
- the items keyvalue
- the itemjava.lang.IllegalStateException
- if context is read onlypublic void hide(java.lang.Object key) throws java.lang.IllegalStateException
key
- the items keyjava.lang.IllegalStateException
- if context is read onlyprotected final java.util.Map getContextData()
protected final Context getParent()
public void makeReadOnly()
protected final void checkWriteable() throws java.lang.IllegalStateException
java.lang.IllegalStateException
- if context is read only