Source Code Cross Referenced for StrictDimension.java in  » Report » pentaho-report » org » jfree » report » util » geom » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Report » pentaho report » org.jfree.report.util.geom 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /**
002:         * ===========================================
003:         * JFreeReport : a free Java reporting library
004:         * ===========================================
005:         *
006:         * Project Info:  http://reporting.pentaho.org/
007:         *
008:         * (C) Copyright 2001-2007, by Object Refinery Ltd, Pentaho Corporation and Contributors.
009:         *
010:         * This library is free software; you can redistribute it and/or modify it under the terms
011:         * of the GNU Lesser General Public License as published by the Free Software Foundation;
012:         * either version 2.1 of the License, or (at your option) any later version.
013:         *
014:         * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
015:         * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
016:         * See the GNU Lesser General Public License for more details.
017:         *
018:         * You should have received a copy of the GNU Lesser General Public License along with this
019:         * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
020:         * Boston, MA 02111-1307, USA.
021:         *
022:         * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
023:         * in the United States and other countries.]
024:         *
025:         * ------------
026:         * StrictDimension.java
027:         * ------------
028:         * (C) Copyright 2001-2007, by Object Refinery Ltd, Pentaho Corporation and Contributors.
029:         */package org.jfree.report.util.geom;
030:
031:        import java.io.Serializable;
032:
033:        /**
034:         * A dimension object that uses micro-points as units of measurement.
035:         *
036:         * @author Thomas Morgner
037:         */
038:        public class StrictDimension implements  Serializable, Cloneable {
039:            /** The width. */
040:            private long width;
041:            /** The height. */
042:            private long height;
043:            /** A flag indicating whether this object is mutable. */
044:            private boolean locked;
045:
046:            /**
047:             * Default-Constructor.
048:             */
049:            public StrictDimension() {
050:            }
051:
052:            /**
053:             * Creates a new dimension object with the given width and height.
054:             * The object is not locked.
055:             *
056:             * @param width the width.
057:             * @param height the height.
058:             */
059:            public StrictDimension(final long width, final long height) {
060:                this .width = width;
061:                this .height = height;
062:            }
063:
064:            /**
065:             * Checks, whether this instance is locked.
066:             *
067:             * @return true, if the dimension object is locked, false otherwise.
068:             */
069:            public boolean isLocked() {
070:                return locked;
071:            }
072:
073:            /**
074:             * Returns a copy of this dimension which cannot be modified anymore.
075:             *
076:             * @return a locked copy.
077:             */
078:            public StrictDimension getLockedInstance() {
079:                if (locked) {
080:                    return this ;
081:                }
082:
083:                final StrictDimension retval = (StrictDimension) clone();
084:                retval.locked = true;
085:                return retval;
086:            }
087:
088:            /**
089:             * Returns a copy of this dimension which can be modified later.
090:             *
091:             * @return an unlocked copy.
092:             */
093:            public StrictDimension getUnlockedInstance() {
094:                final StrictDimension retval = (StrictDimension) clone();
095:                retval.locked = false;
096:                return retval;
097:            }
098:
099:            /**
100:             * Sets the size of this <code>Dimension</code> object to the specified width and
101:             * height.
102:             *
103:             * @param width  the new width for the <code>Dimension</code> object
104:             * @param height the new height for the <code>Dimension</code> object
105:             * @throws IllegalStateException if the dimension object is locked
106:             */
107:            public void setSize(final long width, final long height) {
108:                if (locked) {
109:                    throw new IllegalStateException("This object is locked");
110:                }
111:
112:                this .width = width;
113:                this .height = height;
114:            }
115:
116:            /**
117:             * Returns the height of this dimension object.
118:             *
119:             * @return the height.
120:             */
121:            public long getHeight() {
122:                return height;
123:            }
124:
125:            /**
126:             * Updates the height of this dimension object.
127:             *
128:             * @param height the new height, given in micro-points.
129:             */
130:            public void setHeight(final long height) {
131:                if (locked) {
132:                    throw new IllegalStateException("This object is locked");
133:                }
134:                this .height = height;
135:            }
136:
137:            /**
138:             * Returns the width of this dimension object.
139:             *
140:             * @return the width.
141:             */
142:            public long getWidth() {
143:                return width;
144:            }
145:
146:            /**
147:             * Updates the width of this dimension object.
148:             *
149:             * @param width the new width, given in micro-points.
150:             */
151:            public void setWidth(final long width) {
152:                if (locked) {
153:                    throw new IllegalStateException("This object is locked");
154:                }
155:                this .width = width;
156:            }
157:
158:            /**
159:             * Creates a copy of this object. This method is guaranteed to never throw
160:             * a CloneNotSupportedException.
161:             *
162:             * @return the cloned copy.
163:             */
164:            public Object clone() {
165:                try {
166:                    return super .clone();
167:                } catch (CloneNotSupportedException e) {
168:                    throw new InternalError("Clone must always be supported.");
169:                }
170:            }
171:
172:            /**
173:             * Returns a String representation of this dimension object.
174:             *
175:             * @return a string describing the object.
176:             */
177:            public String toString() {
178:                return "org.jfree.report.util.geom.StrictDimension{" + "width="
179:                        + width + ", height=" + height + '}';
180:            }
181:
182:            /**
183:             * Checks, whether the given object is a StrictDimension instance convering the
184:             * same area as this dimension.
185:             *
186:             * @param o the other object.
187:             * @return true, if the other object is equal to this object, false otherwise.
188:             */
189:            public boolean equals(final Object o) {
190:                if (this  == o) {
191:                    return true;
192:                }
193:                if (o == null || getClass() != o.getClass()) {
194:                    return false;
195:                }
196:
197:                final StrictDimension that = (StrictDimension) o;
198:
199:                if (height != that.height) {
200:                    return false;
201:                }
202:                if (width != that.width) {
203:                    return false;
204:                }
205:
206:                return true;
207:            }
208:
209:            /**
210:             * Computes the hashcode for this dimension.
211:             *
212:             * @return the computed hashcode.
213:             */
214:            public int hashCode() {
215:                int result = (int) (width ^ (width >>> 32));
216:                result = 29 * result + (int) (height ^ (height >>> 32));
217:                return result;
218:            }
219:        }
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