1 /* RefAddr.java -- Abstract superclass of addresses used in References
2 Copyright (C) 2000, 2001 Free Software Foundation, Inc.
4 This file is part of GNU Classpath.
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7 it under the terms of the GNU General Public License as published by
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12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
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18 Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
21 Linking this library statically or dynamically with other modules is
22 making a combined work based on this library. Thus, the terms and
23 conditions of the GNU General Public License cover the whole
26 As a special exception, the copyright holders of this library give you
27 permission to link this library with independent modules to produce an
28 executable, regardless of the license terms of these independent
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30 terms of your choice, provided that you also meet, for each linked
31 independent module, the terms and conditions of the license of that
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35 obligated to do so. If you do not wish to do so, delete this
36 exception statement from your version. */
40 import java.io.Serializable;
43 * Abstract superclass of addresses used in References.
44 * A <code>Reference</code> object contains a <code>Vector</code> of
45 * <code>RefAddr</code>s which are used to reference/address the object.
46 * This abstract superclass keeps track of the type of address, which will be
47 * returned by <code>getType()</code>. And defines a abstract method
48 * <code>getContent()</code> which must be implemented in concrete subclasses
49 * such as <code>BinaryRefAddr</code> and <code>StringRefAddr</code>.
55 * @author Anthony Green (green@redhat.com)
56 * @author Mark Wielaard (mark@klomp.org)
58 public abstract class RefAddr implements Serializable
61 * The string resprenstation of the type of address.
62 * Set by the constructor and returned by the getType() method.
64 protected String addrType;
67 * Protected constructor for use by subclasses.
68 * Sets the addrType field of this object to the supplied String.
70 * @exception NullPointerException if the supplied String is null.
72 protected RefAddr(String addrType)
75 throw new NullPointerException("addrType cannot be null");
77 this.addrType = addrType;
81 * Returns the non-null address type given to the constructor.
83 public String getType()
89 * Returns the possibly null content of this RefAddr.
90 * The actual value is defined by the non-abstract subclass.
92 public abstract Object getContent();
95 * Checks if the object is a RefAddr with the same type and content.
97 * @return true if the given object is an instance of RefAddr, the addrType
98 * is the same as this addrType and the content is equals to the
99 * content of this object.
101 public boolean equals(Object o)
103 if (o instanceof RefAddr)
105 RefAddr refAddr = (RefAddr) o;
106 if (this.getType().equals(refAddr.getType()))
108 Object c1 = this.getContent();
109 Object c2 = refAddr.getContent();
113 return c1.equals(c2);
120 * Returns the hashCode which is the hasCode of the String returned by
121 * <code>getType()</code> plus the hashCode of the Object returned by
122 * <code>getContent</code> (when not null).
124 public int hashCode()
126 int result = getType().hashCode();
127 Object o = getContent();
129 result += o.hashCode();
135 * Returns a String representation of the RefAddr.
136 * Should only be used for debugging purposes.
138 public String toString()
140 return "[RefAddr type: " + getType() + " content: " + getContent() + ']';