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90 lines
2.5 KiB
Java
90 lines
2.5 KiB
Java
/**
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* Copyright 2006 Bertoli Marco
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.gamingmesh.jobs.resources.jfep;
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/**
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* <p><b>Name:</b> ExpressionNode</p>
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* <p><b>Description:</b>
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* Common interface implemented by different nodes of an expression tree
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* </p>
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* <p><b>Date:</b> 08/dic/06
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* <b>Time:</b> 14:28:56</p>
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* @author Bertoli Marco
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* @version 1.0
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*/
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public interface ExpressionNode extends Cloneable {
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public static final int CONSTANT_NODE = 0;
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public static final int VARIABLE_NODE = 1;
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public static final int OPERATOR_NODE = 2;
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public static final int FUNCTION_NODE = 3;
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/**
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* Returns value of target node
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* @return value of node
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*/
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public double getValue ();
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/**
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* Sets the value for a variable
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* @param name name of the variable to be set
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* @param value value for the variable
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*/
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public void setVariable(String name, double value);
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/**
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* Returns type of node
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* @return CONSTANT_NODE, VARIABLE_NODE, OPERATOR_NODE, FUNCTION_NODE
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*/
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public int getType();
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/**
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* Returns more information on node type
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* @return name of node function or operator symbol
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*/
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public String getSubtype();
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/**
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* Returns depth of current subtree
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* @return depth of the tree
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*/
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public int getDepth();
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/**
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* Counts number of nodes in current subtree
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* @return number of nodes (included root)
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*/
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public int count();
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/**
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* Returns children nodes of this node, ordered from leftmost to rightmost.
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* @return an array of children nodes. If node has no child, destination array has zero size.
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*/
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public ExpressionNode[] getChildrenNodes();
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/**
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* Returns a string describing the entire tree
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* @return string describing the entire tree
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*/
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public String toString();
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/**
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* Clones current node
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* @return deep copy of current node
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*/
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public Object clone();
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}
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