JavaSTUDY1/algorithms/Table.html at master · Slyrich/JavaSTUDY1 · GitHub

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<head>

<title>Table</title>

</head>

<body>

if (location.href.indexOf('is-external=true') == -1) {

parent.document.title="Table";

}

//-->

</script>

<div>JavaScript is disabled on your browser.</div>

</noscript>

</a><a href="#skip-navbar_top" title="Skip navigation links"></a><a name="navbar_top_firstrow">

</a>

<li><a href="../ASS/package-summary.html">Package</a></li>

<li class="navBarCell1Rev">Class</li>

<li><a href="../deprecated-list.html">Deprecated</a></li>

<li><a href="../index-files/index-1.html">Index</a></li>

</ul>

</div>

<li><a href="../ASS/KeyType.html" title="class in ASS"><span class="strong">Prev Class</span></a></li>

<li>Next Class</li>

</ul>

<li><a href="../index.html?ASS/Table.html" target="_top">Frames</a></li>

<li><a href="Table.html" target="_top">No Frames</a></li>

</ul>

<li><a href="../allclasses-noframe.html">All Classes</a></li>

</ul>

<div>

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if(window==top) {

allClassesLink.style.display = "block";

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</div>

<div>

<li>Summary: </li>

<li>Nested | </li>

<li>Field | </li>

<li><a href="#constructor_summary">Constr</a> | </li>

<li><a href="#method_summary">Method</a></li>

</ul>

<li>Detail: </li>

<li>Field | </li>

<li><a href="#constructor_detail">Constr</a> | </li>

<li><a href="#method_detail">Method</a></li>

</ul>

</div>

</a></div>

<h2 title="Class Table" class="title">Class Table</h2>

</div>

<li>java.lang.Object</li>

<li>

<li>ASS.Table</li>

</ul>

</li>

</ul>

<dl>

<dt>All Implemented Interfaces:</dt>

<dd>java.io.Serializable, java.lang.Cloneable</dd>

</dl>

<hr>

<br>

<pre>public class <span class="strong">Table</span>

extends java.lang.Object

implements java.io.Serializable, java.lang.Cloneable</pre>

<div class="block">This class implements relational database tables (including attribute names,

domains and a list of tuples. Five basic relational algebra operators are

provided: project, select, union, minus and join. The insert data manipulation

operator is also provided. Missing are update and delete data manipulation

operators.</div>

<dl><dt><span class="strong">See Also:</span></dt><dd><a href="../serialized-form.html#ASS.Table">Serialized Form</a></dd></dl>

</li>

</ul>

</div>

</a>

<h3>Constructor Summary</h3>

<caption><span>Constructors</span><span class="tabEnd"> </span></caption>

<tr>

<th class="colOne" scope="col">Constructor and Description</th>

</tr>

<td class="colOne"><code><strong><a href="../ASS/Table.html#Table(java.lang.String, java.lang.String[], java.lang.Class[], java.lang.String[])">Table</a></strong>(java.lang.String _name,

java.lang.String[] _attribute,

java.lang.Class[] _domain,

java.lang.String[] _key)</code>

<div class="block">Construct an empty table from the meta-data specifications.</div>

</td>

</tr>

<td class="colOne"><code><strong><a href="../ASS/Table.html#Table(java.lang.String, java.lang.String, java.lang.String, java.lang.String)">Table</a></strong>(java.lang.String name,

java.lang.String attributes,

java.lang.String domains,

java.lang.String _key)</code>

<div class="block">Construct an empty table from the raw string specifications.</div>

</td>

</tr>

<td class="colOne"><code><strong><a href="../ASS/Table.html#Table(ASS.Table, java.lang.String)">Table</a></strong>(<a href="../ASS/Table.html" title="class in ASS">Table</a> tab,

java.lang.String suffix)</code>

<div class="block">Construct an empty table using the meta-data of an existing table.</div>

</td>

</tr>

</table>

</li>

</ul>

</a>

<h3>Method Summary</h3>

<caption><span>Methods</span><span class="tabEnd"> </span></caption>

<tr>

<th class="colFirst" scope="col">Modifier and Type</th>

<th class="colLast" scope="col">Method and Description</th>

</tr>

<td class="colFirst"><code>boolean</code></td>

<td class="colLast"><code><strong><a href="../ASS/Table.html#compatible(ASS.Table)">compatible</a></strong>(<a href="../ASS/Table.html" title="class in ASS">Table</a> table2)</code>

<div class="block">Determine whether the two tables (this and table2) are compatible, i.e.,

have the same number of attributes each with the same corresponding domain.</div>

</td>

</tr>

<td class="colFirst"><code>java.lang.String</code></td>

<td class="colLast"><code><strong><a href="../ASS/Table.html#getName()">getName</a></strong>()</code>

<div class="block">Get the name of the table.</div>

</td>

</tr>

<td class="colFirst"><code>boolean</code></td>

<td class="colLast"><code><strong><a href="../ASS/Table.html#insert(java.lang.Comparable[])">insert</a></strong>(java.lang.Comparable[] tup)</code>

<div class="block">Insert a tuple to the table.</div>

</td>

</tr>

<td class="colFirst"><code><a href="../ASS/Table.html" title="class in ASS">Table</a></code></td>

<td class="colLast"><code><strong><a href="../ASS/Table.html#join(java.lang.String, ASS.Table)">join</a></strong>(java.lang.String condition,

<a href="../ASS/Table.html" title="class in ASS">Table</a> table2)</code>

<div class="block">Join this table and table2.</div>

</td>

</tr>

<td class="colFirst"><code><a href="../ASS/Table.html" title="class in ASS">Table</a></code></td>

<td class="colLast"><code><strong><a href="../ASS/Table.html#minus(ASS.Table)">minus</a></strong>(<a href="../ASS/Table.html" title="class in ASS">Table</a> table2)</code>

<div class="block">Take the difference of this table and table2.</div>

</td>

</tr>

<td class="colLast"><code><strong><a href="../ASS/Table.html#print()">print</a></strong>()</code>

<div class="block">Print the table.</div>

</td>

</tr>

<td class="colFirst"><code><a href="../ASS/Table.html" title="class in ASS">Table</a></code></td>

<td class="colLast"><code><strong><a href="../ASS/Table.html#project(java.lang.String)">project</a></strong>(java.lang.String attributeList)</code>

<div class="block">Project the tuples onto a lower dimension by keeping only the given attributes.</div>

</td>

</tr>

<td class="colFirst"><code><a href="../ASS/Table.html" title="class in ASS">Table</a></code></td>

<td class="colLast"><code><strong><a href="../ASS/Table.html#select(java.lang.String)">select</a></strong>(java.lang.String condition)</code>

<div class="block">Select the tuples satisfying the given condition.</div>

</td>

</tr>

<td class="colFirst"><code><a href="../ASS/Table.html" title="class in ASS">Table</a></code></td>

<td class="colLast"><code><strong><a href="../ASS/Table.html#union(ASS.Table)">union</a></strong>(<a href="../ASS/Table.html" title="class in ASS">Table</a> table2)</code>

<div class="block">Union this table and table2.</div>

</td>

</tr>

</table>

</a>

<h3>Methods inherited from class java.lang.Object</h3>

<code>equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</code></li>

</ul>

</li>

</ul>

</li>

</ul>

</div>

</a>

<h3>Constructor Detail</h3>

</a>

<h4>Table</h4>

<pre>public Table(java.lang.String _name,

java.lang.String[] _attribute,

java.lang.Class[] _domain,

java.lang.String[] _key)</pre>

<div class="block">Construct an empty table from the meta-data specifications.</div>

<dl><dt><span class="strong">Parameters:</span></dt><dd><code>_name</code> - the name of the relation</dd><dd><code>_attribute</code> - the string containing attributes names</dd><dd><code>_domain</code> - the string containing attribute domains (data types)</dd><dd><code>_key</code> - the primary key</dd></dl>

</li>

</ul>

</a>

<h4>Table</h4>

<pre>public Table(java.lang.String name,

java.lang.String attributes,

java.lang.String domains,

java.lang.String _key)</pre>

<div class="block">Construct an empty table from the raw string specifications.</div>

<dl><dt><span class="strong">Parameters:</span></dt><dd><code>name</code> - the name of the relation</dd><dd><code>attributes</code> - the string containing attributes names</dd><dd><code>domains</code> - the string containing attribute domains (data types)</dd></dl>

</li>

</ul>

</a>

<h4>Table</h4>

<pre>public Table(<a href="../ASS/Table.html" title="class in ASS">Table</a> tab,

java.lang.String suffix)</pre>

<div class="block">Construct an empty table using the meta-data of an existing table.</div>

<dl><dt><span class="strong">Parameters:</span></dt><dd><code>tab</code> - the table supplying the meta-data</dd><dd><code>suffix</code> - the suffix appended to create new table name</dd></dl>

</li>

</ul>

</li>

</ul>

</a>

<h3>Method Detail</h3>

</a>

<h4>project</h4>

<pre>public <a href="../ASS/Table.html" title="class in ASS">Table</a> project(java.lang.String attributeList)</pre>

<div class="block">Project the tuples onto a lower dimension by keeping only the given attributes.

Check whether the original key is included in the projection.

#usage movie.project ("title year studioNo")</div>

<dl><dt><span class="strong">Parameters:</span></dt><dd><code>attributeList</code> - the attributes to project onto</dd>

<dt><span class="strong">Returns:</span></dt><dd>the table consisting of projected tuples</dd></dl>

</li>

</ul>

</a>

<h4>select</h4>

<pre>public <a href="../ASS/Table.html" title="class in ASS">Table</a> select(java.lang.String condition)</pre>

<div class="block">Select the tuples satisfying the given condition.

A condition is written as infix expression consists of

6 comparison operators: "==", "!=", "<", "<=", ">", ">="

2 Boolean operators: "&", "|" (from high to low precedence)

#usage movie.select ("1979 < year & year < 1990")</div>

<dl><dt><span class="strong">Parameters:</span></dt><dd><code>condition</code> - the check condition for tuples</dd>

<dt><span class="strong">Returns:</span></dt><dd>the table consisting of tuples satisfying the condition</dd></dl>

</li>

</ul>

</a>

<h4>union</h4>

<pre>public <a href="../ASS/Table.html" title="class in ASS">Table</a> union(<a href="../ASS/Table.html" title="class in ASS">Table</a> table2)</pre>

<div class="block">Union this table and table2. Check that the two tables are compatible.

#usage movie.union (show)</div>

<dl><dt><span class="strong">Parameters:</span></dt><dd><code>table2</code> - the rhs table in the union operation</dd>

<dt><span class="strong">Returns:</span></dt><dd>the table representing the union (this U table2)</dd></dl>

</li>

</ul>

</a>

<h4>minus</h4>

<pre>public <a href="../ASS/Table.html" title="class in ASS">Table</a> minus(<a href="../ASS/Table.html" title="class in ASS">Table</a> table2)</pre>

<div class="block">Take the difference of this table and table2. Check that the two tables

are compatible.

#usage movie.minus (show)</div>

<dl><dt><span class="strong">Parameters:</span></dt><dd><code>table2</code> - the rhs table in the minus operation</dd>

<dt><span class="strong">Returns:</span></dt><dd>the table representing the difference (this - table2)</dd></dl>

</li>

</ul>

</a>

<pre>public <a href="../ASS/Table.html" title="class in ASS">Table</a> join(java.lang.String condition,

<a href="../ASS/Table.html" title="class in ASS">Table</a> table2)</pre>

<div class="block">Join this table and table2. If an attribute name appears in both tables,

assume it is from the first table unless it is qualified with the first

letter of the second table's name (e.g., "s.").

In the result, disambiguate the attribute names in a similar way

(e.g., prefix the second occurrence with "s_").

Caveat: the key parameter assumes joining the table with the foreign key

(this) to the table containing the primary key (table2).

#usage movie.join ("studioNo == name", studio);

#usage movieStar.join ("name == s.name", starsIn);</div>

<dl><dt><span class="strong">Parameters:</span></dt><dd><code>condition</code> - the join condition for tuples</dd><dd><code>table2</code> - the rhs table in the join operation</dd>

<dt><span class="strong">Returns:</span></dt><dd>the table representing the join (this |><| table2)</dd></dl>

</li>

</ul>

</a>

<h4>insert</h4>

<pre>public boolean insert(java.lang.Comparable[] tup)</pre>

<div class="block">Insert a tuple to the table.

#usage movie.insert ("'Star_Wars'", 1977, 124, "T", "Fox", 12345)</div>

<dl><dt><span class="strong">Parameters:</span></dt><dd><code>tup</code> - the array of attribute values forming the tuple</dd>

<dt><span class="strong">Returns:</span></dt><dd>whether insertion was successful</dd></dl>

</li>

</ul>

</a>

<h4>getName</h4>

<pre>public java.lang.String getName()</pre>

<div class="block">Get the name of the table.</div>

<dl><dt><span class="strong">Returns:</span></dt><dd>the table's name</dd></dl>

</li>

</ul>

</a>

<h4>print</h4>

<pre>public void print()</pre>

<div class="block">Print the table.</div>

</li>

</ul>

</a>

<h4>compatible</h4>

<pre>public boolean compatible(<a href="../ASS/Table.html" title="class in ASS">Table</a> table2)</pre>

<div class="block">Determine whether the two tables (this and table2) are compatible, i.e.,

have the same number of attributes each with the same corresponding domain.</div>

<dl><dt><span class="strong">Parameters:</span></dt><dd><code>table2</code> - the rhs table</dd>

<dt><span class="strong">Returns:</span></dt><dd>whether the two tables are compatible</dd></dl>

</li>

</ul>

</li>

</ul>

</li>

</ul>

</div>

</a><a href="#skip-navbar_bottom" title="Skip navigation links"></a><a name="navbar_bottom_firstrow">

</a>

<li><a href="../ASS/package-summary.html">Package</a></li>

<li class="navBarCell1Rev">Class</li>

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<li><a href="../index-files/index-1.html">Index</a></li>

</ul>

</div>

<li><a href="../ASS/KeyType.html" title="class in ASS"><span class="strong">Prev Class</span></a></li>

<li>Next Class</li>

</ul>

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<li><a href="Table.html" target="_top">No Frames</a></li>

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<li><a href="../allclasses-noframe.html">All Classes</a></li>

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allClassesLink = document.getElementById("allclasses_navbar_bottom");

if(window==top) {

allClassesLink.style.display = "block";

}

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allClassesLink.style.display = "none";

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//-->

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</div>

<div>

<li>Summary: </li>

<li>Nested | </li>

<li>Field | </li>

<li><a href="#constructor_summary">Constr</a> | </li>

<li><a href="#method_summary">Method</a></li>

</ul>

<li>Detail: </li>

<li>Field | </li>

<li><a href="#constructor_detail">Constr</a> | </li>

<li><a href="#method_detail">Method</a></li>

</ul>

</div>

</a></div>

</body>

</html>

JavaSTUDY1/algorithms/Table.html at master · Slyrich/JavaSTUDY1 · GitHub

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