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Diffstat (limited to 'src/pl/edu/mimuw/cloudatlas/model/Attribute.java')
-rw-r--r-- | src/pl/edu/mimuw/cloudatlas/model/Attribute.java | 106 |
1 files changed, 0 insertions, 106 deletions
diff --git a/src/pl/edu/mimuw/cloudatlas/model/Attribute.java b/src/pl/edu/mimuw/cloudatlas/model/Attribute.java deleted file mode 100644 index 46ffab3..0000000 --- a/src/pl/edu/mimuw/cloudatlas/model/Attribute.java +++ /dev/null @@ -1,106 +0,0 @@ -/** - * Copyright (c) 2014, University of Warsaw - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without modification, are permitted - * provided that the following conditions are met: - * - * 1. Redistributions of source code must retain the above copyright notice, this list of - * conditions and the following disclaimer. - * - * 2. Redistributions in binary form must reproduce the above copyright notice, this list of - * conditions and the following disclaimer in the documentation and/or other materials provided - * with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND - * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR - * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, - * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY - * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -package pl.edu.mimuw.cloudatlas.model; - -/** - * Represents an attribute (without value, name only). - * <p> - * A valid attribute name is an identifier starting with a letter and containing only letters and digits. It can - * additionally start with an ampersand - such names are reserved for queries. - * <p> - * This class is immutable. - */ -public class Attribute { - private final String name; - - /** - * Creates a new <code>Attribute</code> object with the specified <code>name</code>. - * - * @param name the name of the attribute - * @throws IllegalArgumentException if the <code>name</code> does not meet the rules - */ - public Attribute(String name) { - if(!name.matches("^&?[a-zA-Z]{1}[a-zA-z0-9_]*$")) - throw new IllegalArgumentException("Invalid name: may contain only letters, digits, underscores, " - + "must start with a letter and may optionally have an ampersand at the beginning."); - this.name = name; - } - - /** - * Indicates whether an <code>attribute</code> represents a query. This is true if and only if the attribute's name starts with an ampersand. - * - * @param attribute the attribute to check - * @return whether the <code>attribute</code> represents a query - */ - public static boolean isQuery(Attribute attribute) { - return attribute.getName().startsWith("&"); - } - - /** - * Gets the name of this attribute. - * - * @return string representing name - */ - public String getName() { - return name; - } - - /** - * Returns a hash code value for this attribute. For proper behavior when using <code>Attribute</code> objects in - * <code>HashMap</code>, <code>HashSet</code> etc. this is the hash code of a string representing the attribute's name. - * - * @return hash code for this attribute - */ - @Override - public int hashCode() { - return name.hashCode(); - } - - /** - * Indicates whether another object is equal to this attribute. - * - * @param object the object to check - * @return true if and only if the <code>object</code> is an instance of <code>Attribute</code> class and has - * an identical name - */ - @Override - public boolean equals(Object object) { - if(object == null) - return false; - if(getClass() != object.getClass()) - return false; - return name.equals(((Attribute)object).name); - } - - /** - * Returns a textual representation of this attribute. - * - * @return the name of this attribute - */ - @Override - public String toString() { - return name; - } -} |