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/**
* Copyright (C) 2006-2014 phloc systems
* http://www.phloc.com
* office[at]phloc[dot]com
*
* Licensed 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 com.phloc.commons.microdom;
import java.io.Serializable;
import java.util.List;
import javax.annotation.Nonnegative;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import com.phloc.commons.ICloneable;
import com.phloc.commons.annotations.Nonempty;
import com.phloc.commons.parent.IHasChildrenSorted;
import com.phloc.commons.parent.IHasParent;
import com.phloc.commons.state.EChange;
/**
* This is the base interface for all kind of nodes in the micro document object
* model.
*
* @author Philip Helger
*/
public interface IMicroNode extends ICloneable , IHasChildrenSorted , IHasParent , Serializable
{
/**
* @return Just an abstract name that depends on the implementing class.
*/
@Nonnull
@Nonempty
String getNodeName ();
/**
* @return The value of this node. This depends on the concrete implementation
* class. It is currently implemented for {@link IMicroText},
* {@link IMicroComment} and {@link IMicroEntityReference}.
*/
String getNodeValue ();
/**
* @return true if at least one child is present,
* false otherwise
*/
boolean hasChildren ();
/**
* Get a list of all direct child nodes.
*
* @return May be null if the node has no children.
*/
@Nullable
List getChildren ();
/**
* @return The first child node of this node, or null if this
* node has no children.
*/
@Nullable
IMicroNode getFirstChild ();
/**
* @return The last child node of this node, or null if this node
* has no children.
*/
@Nullable
IMicroNode getLastChild ();
/**
* Recursively get all children. Micro container are contained in this list
* (incl. their children of course)
*
* @return A list containing all recursively contained child elements. May be
* null if this node has no children.
*/
@Nullable
List getAllChildrenRecursive ();
/**
* @return The previous node on the same level as this node, or
* null if this node has no preceding siblings.
*/
@Nullable
IMicroNode getPreviousSibling ();
/**
* @return The next node on the same level as this node, or null
* if this node has no succeeding siblings.
*/
@Nullable
IMicroNode getNextSibling ();
/**
* @return true if this node has a parent node assigned,
* false otherwise.
*/
boolean hasParent ();
/**
* @return May be null.
*/
@Nullable
IMicroNode getParent ();
/**
* Detach this node from the parent node so it can be inserted into another
* node without problems. Otherwise you would get an
* {@link IllegalStateException} if adding this node again to another parent
* since each node can only have one parent.
*
* @return this
*/
@Nonnull
IMicroNode detachFromParent ();
@Nullable
IMicroElement getParentElementWithName (@Nullable String sTagName);
@Nullable
IMicroElement getParentElementWithName (@Nullable String sNamespaceURI, @Nullable String sTagName);
/**
* Append any child to the node.
*
* @param
* Parameter type == return type
* @param aChildNode
* The child node to append. May be null.
* @return The appended node, or null if the parameter was
* null.
* @throws MicroException
* if this node cannot have children
*/
@Nullable
NODETYPE appendChild (@Nullable NODETYPE aChildNode) throws MicroException;
/**
* Insert an existing node before a certain child node of this.
*
* @param aChildNode
* The new child node to be inserted.
* @param aSuccessor
* The node before which the new node will be inserted.
* @return The newly inserted node
* @throws MicroException
* if this node cannot have children
*/
@Nullable
NODETYPE insertBefore (@Nullable NODETYPE aChildNode, @Nonnull IMicroNode aSuccessor) throws MicroException;
/**
* Insert an existing node after a certain child node of this.
*
* @param aChildNode
* The new child node to be inserted.
* @param aPredecessor
* The node after which the new node will be inserted.
* @return The newly inserted node
* @throws MicroException
* if this node cannot have children
*/
@Nullable
NODETYPE insertAfter (@Nullable NODETYPE aChildNode, @Nonnull IMicroNode aPredecessor) throws MicroException;
/**
* Insert an existing node as a child at the specified index.
*
* @param nIndex
* The index to insert. Must be ≥ 0.
* @param aChildNode
* The new child node to be inserted.
* @return The newly inserted node
* @throws MicroException
* if this node cannot have children
*/
@Nullable
NODETYPE insertAtIndex (@Nonnegative int nIndex, @Nullable NODETYPE aChildNode) throws MicroException;
/**
* Append a text node to this node.
*
* @param sText
* text to be added
* @return The created text node.
* @throws MicroException
* if this node cannot have children
*/
@Nonnull
IMicroText appendText (@Nullable CharSequence sText) throws MicroException;
/**
* Append a text node to this node.
*
* @param aChars
* Characters to append. May not be null
* @return The created text node.
* @throws MicroException
* if this node cannot have children
*/
@Nonnull
IMicroText appendText (@Nonnull char [] aChars) throws MicroException;
/**
* Append a text node to this node.
*
* @param aChars
* Characters to append. May not be null
* @param nOfs
* Offset into the array where to start copying data. May not be <,
* 0.
* @param nLen
* Number of bytes to take from the array. May not be <, 0.
* @return The created text node.
* @throws MicroException
* if this node cannot have children
*/
@Nonnull
IMicroText appendText (@Nonnull char [] aChars, @Nonnegative int nOfs, @Nonnegative int nLen) throws MicroException;
/**
* Append a text node to this node. If the type of the value is not
* {@link String}, the {@link com.phloc.commons.typeconvert.TypeConverter} is
* invoked to convert it to a {@link String} object.
*
* @param aValue
* text to be added
* @return The created text node.
* @throws MicroException
* if this node cannot have children
*/
@Nonnull
IMicroText appendTextWithConversion (@Nullable Object aValue) throws MicroException;
/**
* Append a text node which is ignorable whitespace content to this node.
*
* @param sText
* The whitespace content to be added.
* @return The created text node.
* @throws MicroException
* if this node cannot have children
*/
@Nonnull
IMicroText appendIgnorableWhitespaceText (@Nullable CharSequence sText) throws MicroException;
/**
* Append a text node which is ignorable whitespace content to this node.
*
* @param aChars
* Characters to append. May not be null
* @return The created text node.
* @throws MicroException
* if this node cannot have children
*/
@Nonnull
IMicroText appendIgnorableWhitespaceText (@Nonnull char [] aChars) throws MicroException;
/**
* Append a text node which is ignorable whitespace content to this node.
*
* @param aChars
* Characters to append. May not be null
* @param nOfs
* Offset into the array where to start copying data. May not be <,
* 0.
* @param nLen
* Number of bytes to take from the array. May not be <, 0.
* @return The created text node.
* @throws MicroException
* if this node cannot have children
*/
@Nonnull
IMicroText appendIgnorableWhitespaceText (@Nonnull char [] aChars, @Nonnegative int nOfs, @Nonnegative int nLen) throws MicroException;
/**
* Append a CDATA node to this node.
*
* @param sText
* CDATA text
* @return The created CDATA node.
* @throws MicroException
* if this node cannot have children
*/
@Nonnull
IMicroCDATA appendCDATA (@Nullable CharSequence sText) throws MicroException;
/**
* Append a CDATA node to this node.
*
* @param aChars
* Characters to append. May not be null
* @return The created CDATA node.
* @throws MicroException
* if this node cannot have children
*/
@Nonnull
IMicroCDATA appendCDATA (@Nonnull char [] aChars) throws MicroException;
/**
* Append a CDATA node to this node.
*
* @param aChars
* Characters to append. May not be null
* @param nOfs
* Offset into the array where to start copying data. May not be <,
* 0.
* @param nLen
* Number of bytes to take from the array. May not be <, 0.
* @return The created CDATA node.
* @throws MicroException
* if this node cannot have children
*/
@Nonnull
IMicroCDATA appendCDATA (@Nonnull char [] aChars, @Nonnegative int nOfs, @Nonnegative int nLen) throws MicroException;
/**
* Append a CDATA node to this node. If the type of the value is not
* {@link String}, the {@link com.phloc.commons.typeconvert.TypeConverter} is
* invoked to convert it to a {@link String} object.
*
* @param aValue
* CDATA to be added
* @return The created CDATA node.
* @throws MicroException
* if this node cannot have children
*/
@Nonnull
IMicroCDATA appendCDATAWithConversion (@Nullable Object aValue) throws MicroException;
/**
* Append a comment node to this node.
*
* @param sText
* comment text
* @return The created comment.
* @throws MicroException
* if this node cannot have children
*/
@Nonnull
IMicroComment appendComment (@Nullable CharSequence sText) throws MicroException;
/**
* Append a comment node to this node.
*
* @param aChars
* Characters to append. May not be null
* @return The created comment.
* @throws MicroException
* if this node cannot have children
*/
@Nonnull
IMicroComment appendComment (@Nonnull char [] aChars) throws MicroException;
/**
* Append a comment node to this node.
*
* @param aChars
* Characters to append. May not be null
* @param nOfs
* Offset into the array where to start copying data. May not be <,
* 0.
* @param nLen
* Number of bytes to take from the array. May not be <, 0.
* @return The created comment.
* @throws MicroException
* if this node cannot have children
*/
@Nonnull
IMicroComment appendComment (@Nonnull char [] aChars, @Nonnegative int nOfs, @Nonnegative int nLen) throws MicroException;
/**
* Append a comment node to this node. If the type of the value is not
* {@link String}, the {@link com.phloc.commons.typeconvert.TypeConverter} is
* invoked to convert it to a {@link String} object.
*
* @param aValue
* Comment to be added
* @return The created comment node.
* @throws MicroException
* if this node cannot have children
*/
@Nonnull
IMicroComment appendCommentWithConversion (@Nullable Object aValue) throws MicroException;
/**
* Append an entity reference to this node.
*
* @param sName
* The name of the entity reference.
* @return The created entity reference.
* @throws MicroException
* if this node cannot have children
*/
@Nonnull
IMicroEntityReference appendEntityReference (@Nonnull String sName) throws MicroException;
/**
* Append an element without namespace to this node.
*
* @param sTagName
* Element name to be created. May neither be null nor
* empty.
* @return The created element
* @throws MicroException
* if this node cannot have children
*/
@Nonnull
IMicroElement appendElement (@Nonnull @Nonempty String sTagName) throws MicroException;
/**
* Append an element with namespace to this node.
*
* @param sNamespaceURI
* Namespace URI to use. May be null.
* @param sTagName
* Element name to be created. May neither be null nor
* empty.
* @return The created element
* @throws MicroException
* if this node cannot have children
*/
@Nonnull
IMicroElement appendElement (@Nullable String sNamespaceURI, @Nonnull @Nonempty String sTagName) throws MicroException;
/**
* Append an element without namespace to this node.
*
* @param aElementNameProvider
* Element name provider. May not be null.
* @return The created element
* @throws MicroException
* if this node cannot have children
*/
@Nonnull
IMicroElement appendElement (@Nonnull IHasElementName aElementNameProvider) throws MicroException;
/**
* Append an element with namespace to this node.
*
* @param sNamespaceURI
* Namespace URI to use. May be null.
* @param aElementNameProvider
* Element name provider. May not be null.
* @return The created element
* @throws MicroException
* if this node cannot have children
*/
@Nonnull
IMicroElement appendElement (@Nullable String sNamespaceURI, @Nonnull IHasElementName aElementNameProvider) throws MicroException;
/**
* Append a processing instruction to this node.
*
* @param sTarget
* The PI target
* @param sData
* The PI data
* @return The created element
* @throws MicroException
* if this node cannot have children
*/
@Nonnull
IMicroProcessingInstruction appendProcessingInstruction (@Nonnull @Nonempty String sTarget, @Nullable String sData) throws MicroException;
/**
* Append a new container to this node
*
* @return The created container.
* @throws MicroException
* if this node cannot have children
*/
@Nonnull
IMicroContainer appendContainer () throws MicroException;
/**
* Remove the passed child.
*
* @param aChild
* The child to be removed. May not be null.
* @return {@link EChange#CHANGED} if the child was successfully removed,
* {@link EChange#UNCHANGED} otherwise.
*/
@Nonnull
EChange removeChild (@Nonnull IMicroNode aChild);
/**
* Remove the child not at the specified index.
*
* @param nIndex
* The 0-based index of the item to be removed.
* @return {@link EChange#CHANGED} if the node was successfully removed,
* {@link EChange#UNCHANGED} otherwise.
*/
@Nonnull
EChange removeChildAtIndex (@Nonnegative int nIndex);
/**
* Remove all children from this node.
*
* @return {@link EChange#CHANGED} if at least one child was present, and was
* successfully removed, {@link EChange#UNCHANGED} otherwise.
*/
@Nonnull
EChange removeAllChildren ();
/**
* Replace the passed old child with the new child.
*
* @param aOldChild
* The child to be removed. May not be null.
* @param aNewChild
* The child to be inserted instead. May not be null.
* @return {@link EChange#CHANGED} if the child was successfully replaced,
* {@link EChange#UNCHANGED} if old child and new child are identical.
*/
@Nonnull
EChange replaceChild (@Nonnull IMicroNode aOldChild, @Nonnull IMicroNode aNewChild);
/**
* @return The node type. Never null.
*/
@Nonnull
EMicroNodeType getType ();
/**
* @return true if this node can safely be casted to
* {@link IMicroDocument}.
*/
boolean isDocument ();
/**
* @return true if this node can safely be casted to
* {@link IMicroDocumentType}.
*/
boolean isDocumentType ();
/**
* @return true if this node can safely be casted to
* {@link IMicroText}.
*/
boolean isText ();
/**
* @return true if this node can safely be casted to
* {@link IMicroCDATA}.
*/
boolean isCDATA ();
/**
* @return true if this node can safely be casted to
* {@link IMicroComment}.
*/
boolean isComment ();
/**
* @return true if this node can safely be casted to
* {@link IMicroEntityReference}.
*/
boolean isEntityReference ();
/**
* @return true if this node can safely be casted to
* {@link IMicroElement}.
*/
boolean isElement ();
/**
* @return true if this node can safely be casted to
* {@link IMicroProcessingInstruction}.
*/
boolean isProcessingInstruction ();
/**
* @return true if this node can safely be casted to
* {@link IMicroContainer}.
*/
boolean isContainer ();
/**
* Register a specific MicroDOM event listener. One event listener can only be
* attached once to an event!
*
* @param eEventType
* The event type. May not be null.
* @param aTarget
* The event target to be added. May not be null.
* @return {@link EChange#CHANGED} if the event listener was registered,
* {@link EChange#UNCHANGED} otherwise.
*/
@Nonnull
EChange registerEventTarget (@Nonnull EMicroEvent eEventType, @Nonnull IMicroEventTarget aTarget);
/**
* Unregister a specific MicroDOM event listener.
*
* @param eEventType
* The event type. May not be null.
* @param aTarget
* The event target to be added. May not be null.
* @return {@link EChange#CHANGED} if the event listener was unregistered,
* {@link EChange#UNCHANGED} otherwise.
*/
@Nonnull
EChange unregisterEventTarget (@Nonnull EMicroEvent eEventType, @Nonnull IMicroEventTarget aTarget);
/**
* As instances of this class may not implement equals/hashCode we need a way
* to determine, if 2 nodes are equal by content.
*
* @param aNode
* The node to compare to this.
* @return true if the nodes are of the same type and the same
* content, false otherwise.
*/
boolean isEqualContent (@Nullable IMicroNode aNode);
}
