org.apache.jackrabbit.oak.spi.state

Class ReadOnlyBuilder

java.lang.Object

org.apache.jackrabbit.oak.spi.state.ReadOnlyBuilder

All Implemented Interfaces:

NodeBuilder

public class ReadOnlyBuilder
extends java.lang.Object
implements NodeBuilder

A node builder that throws an UnsupportedOperationException on all attempts to modify the given base state.

Constructor Summary

Constructors

Constructor and Description
ReadOnlyBuilder(NodeState state)

Method Summary

Modifier and Type	Method and Description
ReadOnlyBuilder	child(java.lang.String name) Returns a builder for constructing changes to the named child node.
Blob	createBlob(java.io.InputStream stream)
boolean	exists() Checks whether this builder represents a node that exists.
NodeState	getBaseState() Returns the original base state that this builder is modifying.
boolean	getBoolean(java.lang.String name) Returns the boolean value of the named property.
NodeBuilder	getChildNode(java.lang.String name) Returns a builder for constructing changes to the named child node.
long	getChildNodeCount(long max) Returns the current number of child nodes.
java.lang.Iterable<java.lang.String>	getChildNodeNames() Returns the names of current child nodes.
java.lang.String	getName(java.lang.String name) Returns the name value of the named property.
java.lang.Iterable<java.lang.String>	getNames(java.lang.String name) Returns the name values of the named property.
NodeState	getNodeState() Returns an immutable node state that matches the current state of the builder.
java.lang.Iterable<? extends PropertyState>	getProperties() Returns the current properties.
PropertyState	getProperty(java.lang.String name) Returns the current state of the named property, or null if the property is not set.
long	getPropertyCount() Returns the current number of properties.
java.lang.String	getString(java.lang.String name) Returns the name value of the named property.
boolean	hasChildNode(java.lang.String name) Checks whether the named child node currently exists.
boolean	hasProperty(java.lang.String name) Checks whether the named property exists.
boolean	isModified() Check whether this builder represents a modified node, which has either modified properties or removed or added child nodes.
boolean	isNew() Check whether this builder represents a new node, which is not present in the base state.
boolean	isNew(java.lang.String name) Check whether the named property is new, i.e.
boolean	isReplaced() Check whether this builder represents a node that used to exist but was then replaced with other content, for example as a result of a NodeBuilder.setChildNode(String) call.
boolean	isReplaced(java.lang.String name) Check whether the named property exists in the base state but is replaced with other content, for example as a result of a NodeBuilder.setProperty(PropertyState) call.
boolean	moveTo(NodeBuilder newParent, java.lang.String newName) Move this child to a new parent with a new name.
boolean	remove() Remove this child node from its parent.
NodeBuilder	removeProperty(java.lang.String name) Remove the named property.
NodeBuilder	setChildNode(java.lang.String name) Adds the named child node and returns a builder for modifying it.
NodeBuilder	setChildNode(java.lang.String name, NodeState nodeState) Adds or replaces a subtree.
NodeBuilder	setProperty(PropertyState property) Set a property state
<T> NodeBuilder	setProperty(java.lang.String name, T value) Set a property state
<T> NodeBuilder	setProperty(java.lang.String name, T value, Type<T> type) Set a property state

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ReadOnlyBuilder

public ReadOnlyBuilder(NodeState state)

Method Detail

exists

public boolean exists()

Description copied from interface: NodeBuilder

Checks whether this builder represents a node that exists.

Specified by:

exists in interface NodeBuilder

Returns:

true if the node exists, false otherwise

isNew

public boolean isNew()

Description copied from interface: NodeBuilder

Check whether this builder represents a new node, which is not present in the base state.

Specified by:

isNew in interface NodeBuilder

Returns:

true for a new node

isNew

public boolean isNew(java.lang.String name)

Description copied from interface: NodeBuilder

Check whether the named property is new, i.e. not present in the base state.

Specified by:

isNew in interface NodeBuilder

Parameters:

name - property name

Returns:

true for a new property

isModified

public boolean isModified()

Description copied from interface: NodeBuilder

Check whether this builder represents a modified node, which has either modified properties or removed or added child nodes.

Specified by:

isModified in interface NodeBuilder

Returns:

true for a modified node

isReplaced

public boolean isReplaced()

Description copied from interface: NodeBuilder

Check whether this builder represents a node that used to exist but was then replaced with other content, for example as a result of a NodeBuilder.setChildNode(String) call.

Specified by:

isReplaced in interface NodeBuilder

Returns:

true for a replaced node

isReplaced

public boolean isReplaced(java.lang.String name)

Description copied from interface: NodeBuilder

Check whether the named property exists in the base state but is replaced with other content, for example as a result of a NodeBuilder.setProperty(PropertyState) call.

Specified by:

isReplaced in interface NodeBuilder

Parameters:

name - property name

Returns:

true for a replaced property

getNodeState

public NodeState getNodeState()

Description copied from interface: NodeBuilder

Returns an immutable node state that matches the current state of the builder.

Specified by:

getNodeState in interface NodeBuilder

Returns:

immutable node state

getBaseState

public NodeState getBaseState()

Description copied from interface: NodeBuilder

Returns the original base state that this builder is modifying. The return value may be non-existent (i.e. its exists method returns false) if this builder represents a new node that didn't exist in the base content tree.

Specified by:

getBaseState in interface NodeBuilder

Returns:

base node state, possibly non-existent

getChildNodeCount

public long getChildNodeCount(long max)

Description copied from interface: NodeBuilder

Returns the current number of child nodes.

If an implementation does know the exact value, it returns it (even if the value is higher than max). If the implementation does not know the exact value, and the child node count is higher than max, it may return Long.MAX_VALUE. The cost of the operation is at most O(max).

Specified by:

getChildNodeCount in interface NodeBuilder

Parameters:

max - the maximum value

Returns:

number of child nodes

hasChildNode

public boolean hasChildNode(java.lang.String name)

Description copied from interface: NodeBuilder

Checks whether the named child node currently exists.

Specified by:

hasChildNode in interface NodeBuilder

Parameters:

name - child node name

Returns:

true if the named child node exists, false otherwise

getChildNodeNames

public java.lang.Iterable<java.lang.String> getChildNodeNames()

Description copied from interface: NodeBuilder

Returns the names of current child nodes.

Specified by:

getChildNodeNames in interface NodeBuilder

Returns:

child node names

setChildNode

public NodeBuilder setChildNode(java.lang.String name,
                                NodeState nodeState)

Description copied from interface: NodeBuilder

Adds or replaces a subtree.

Specified by:

setChildNode in interface NodeBuilder

Parameters:

name - name of the child node containing the new subtree

nodeState - subtree

Returns:

child builder

remove

public boolean remove()

Description copied from interface: NodeBuilder

Remove this child node from its parent.

Specified by:

remove in interface NodeBuilder

Returns:

true for existing nodes, false otherwise

moveTo

public boolean moveTo(NodeBuilder newParent,
                      java.lang.String newName)

Description copied from interface: NodeBuilder

Move this child to a new parent with a new name. When the move succeeded this builder has been moved to newParent as child newName. Otherwise neither this builder nor newParent are modified.

The move succeeds if both, this builder and newParent exist, there is no child with newName at newParent and newParent is not in the subtree of this builder.

The move fails if the this builder or newParent does not exist or if there is already a child newName at newParent.

For all remaining cases (e.g. moving a builder into its own subtree) it is left to the implementation whether the move succeeds or fails as long as the state of the involved builder stays consistent.

Specified by:

moveTo in interface NodeBuilder

Parameters:

newParent - builder for the new parent.

newName - name of this child at the new parent

Returns:

true on success, false otherwise

getPropertyCount

public long getPropertyCount()

Description copied from interface: NodeBuilder

Returns the current number of properties.

Specified by:

getPropertyCount in interface NodeBuilder

Returns:

number of properties

getProperties

public java.lang.Iterable<? extends PropertyState> getProperties()

Description copied from interface: NodeBuilder

Returns the current properties.

Specified by:

getProperties in interface NodeBuilder

Returns:

current properties

hasProperty

public boolean hasProperty(java.lang.String name)

Description copied from interface: NodeBuilder

Checks whether the named property exists. The implementation is equivalent to getProperty(name) != null, but may be optimized to avoid having to load the property value.

Specified by:

hasProperty in interface NodeBuilder

Parameters:

name - property name

Returns:

true if the named property exists, false otherwise

getProperty

public PropertyState getProperty(java.lang.String name)

Description copied from interface: NodeBuilder

Returns the current state of the named property, or null if the property is not set.

Specified by:

getProperty in interface NodeBuilder

Parameters:

name - property name

Returns:

property state

getBoolean

public boolean getBoolean(java.lang.String name)

Description copied from interface: NodeBuilder

Returns the boolean value of the named property. The implementation is equivalent to the following code, but may be optimized.

 
 PropertyState property = builder.getProperty(name);
 return property != null
     && property.getType() == Type.BOOLEAN
     && property.getValue(Type.BOOLEAN);
 
 

Specified by:

getBoolean in interface NodeBuilder

Parameters:

name - property name

Returns:

boolean value of the named property, or false

getString

public java.lang.String getString(java.lang.String name)

Description copied from interface: NodeBuilder

Returns the name value of the named property. The implementation is equivalent to the following code, but may be optimized.

 
 PropertyState property = builder.getProperty(name);
 if (property != null && property.getType() == Type.STRING) {
     return property.getValue(Type.STRING);
 } else {
     return null;
 }
 
 

Specified by:

getString in interface NodeBuilder

Parameters:

name - property name

Returns:

string value of the named property, or null

getName

public java.lang.String getName(java.lang.String name)

Description copied from interface: NodeBuilder

Returns the name value of the named property. The implementation is equivalent to the following code, but may be optimized.

 
 PropertyState property = builder.getProperty(name);
 if (property != null && property.getType() == Type.NAME) {
     return property.getValue(Type.NAME);
 } else {
     return null;
 }
 
 

Specified by:

getName in interface NodeBuilder

Parameters:

name - property name

Returns:

name value of the named property, or null

getNames

public java.lang.Iterable<java.lang.String> getNames(java.lang.String name)

Description copied from interface: NodeBuilder

Returns the name values of the named property. The implementation is equivalent to the following code, but may be optimized.

 
 PropertyState property = builder.getProperty(name);
 if (property != null && property.getType() == Type.NAMES) {
     return property.getValue(Type.NAMES);
 } else {
     return Collections.emptyList();
 }
 
 

Specified by:

getNames in interface NodeBuilder

Parameters:

name - property name

Returns:

name values of the named property, or an empty collection

removeProperty

public NodeBuilder removeProperty(java.lang.String name)

Description copied from interface: NodeBuilder

Remove the named property. This method has no effect if a property of the given name does not exist.

Specified by:

removeProperty in interface NodeBuilder

Parameters:

name - name of the property

setProperty

public NodeBuilder setProperty(PropertyState property)

Description copied from interface: NodeBuilder

Set a property state

Specified by:

setProperty in interface NodeBuilder

Parameters:

property - The property state to set

Returns:

this builder

setProperty

public <T> NodeBuilder setProperty(java.lang.String name,
                                   T value)

Description copied from interface: NodeBuilder

Set a property state

Specified by:

setProperty in interface NodeBuilder

Type Parameters:

T - The type of this property. Must be one of String, Blob, byte[], Long, Integer, Double, Boolean, BigDecimal

Parameters:

name - The name of this property

value - The value of this property

Returns:

this builder

setProperty

public <T> NodeBuilder setProperty(java.lang.String name,
                                   T value,
                                   Type<T> type)

Description copied from interface: NodeBuilder

Set a property state

Specified by:

setProperty in interface NodeBuilder

Type Parameters:

T - The type of this property.

Parameters:

name - The name of this property

value - The value of this property

Returns:

this builder

child

public ReadOnlyBuilder child(java.lang.String name)

Description copied from interface: NodeBuilder

Returns a builder for constructing changes to the named child node. If the named child node does not already exist, a new empty child node is automatically created as the base state of the returned child builder. Otherwise the existing child node state is used as the base state of the returned builder.

All updates to the returned child builder will implicitly affect also this builder, as if a setNode(name, childBuilder.getNodeState()) method call had been made after each update. Repeated calls to this method with the same name will return the same child builder instance until an explicit NodeBuilder.setChildNode(String, NodeState) or NodeBuilder.remove() call is made, at which point the link between this builder and a previously returned child builder for that child node name will get broken.

Specified by:

child in interface NodeBuilder

Parameters:

name - name of the child node

Returns:

child builder

getChildNode

public NodeBuilder getChildNode(java.lang.String name)

Description copied from interface: NodeBuilder

Returns a builder for constructing changes to the named child node. If the named child node does not already exist, the returned builder will refer to a non-existent node and trying to modify it will cause IllegalStateExceptions to be thrown.

Specified by:

getChildNode in interface NodeBuilder

Parameters:

name - name of the child node

Returns:

child builder, possibly non-existent

setChildNode

public NodeBuilder setChildNode(java.lang.String name)

Description copied from interface: NodeBuilder

Adds the named child node and returns a builder for modifying it. Possible previous content in the named subtree is removed.

Specified by:

setChildNode in interface NodeBuilder

Parameters:

name - name of the child node

Returns:

child builder

createBlob

public Blob createBlob(java.io.InputStream stream)
                throws java.io.IOException

Specified by:

createBlob in interface NodeBuilder

Throws:

java.io.IOException