| author | Jaroslav Tulach <jtulach@netbeans.org> |
| Sat, 14 Jun 2008 09:52:45 +0200 | |
| changeset 52 | 4257f4cf226b |
| permissions | -rw-r--r-- |
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/* |
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* Element.java |
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* |
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* Created on 12. červenec 2006, 14:14 |
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* |
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* To change this template, choose Tools | Template Manager |
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* and open the template in the editor. |
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*/ |
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|
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package org.netbeans.apifest.boolcircuit; |
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/** |
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* Representation of an element in the circuit. |
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* The internal behaviour of the element is opaque to the API user, it can only |
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* be used as a building block for logical equations, using primitive operation |
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* factories and a factory for input pin representation. |
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* Elements are chained to create the logical net. The inputs to the net are |
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* represented by the elements created by {@link #createInput(boolean[])}
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* factory method. |
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*/ |
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public abstract class Element {
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/** Creates a new instance of Element */ |
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private Element() {
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} |
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/** |
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*/ |
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abstract boolean evaluate(boolean[] inputs); |
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abstract int maxInput(); |
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/** |
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* Creates an Element representing 2-input AND function. |
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* |
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*/ |
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public static Element createAnd(final Element source1, final Element source2) {
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return new Element() {
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boolean evaluate(boolean[] inputs) {
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return source1.evaluate(inputs) & source2.evaluate(inputs); |
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} |
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int maxInput() {
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return Math.max(source1.maxInput(), source2.maxInput()); |
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} |
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}; |
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} |
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/** |
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* Creates an Element representing 2-input OR function. |
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* |
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*/ |
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public static Element createOr(final Element source1, final Element source2) {
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return new Element() {
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boolean evaluate(boolean[] inputs) {
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return source1.evaluate(inputs) | source2.evaluate(inputs); |
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} |
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int maxInput() {
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return Math.max(source1.maxInput(), source2.maxInput()); |
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} |
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}; |
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} |
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/** |
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* Creates an Element representing negation. |
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* |
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*/ |
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public static Element createNot(final Element source1) {
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return new Element() {
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boolean evaluate(boolean[] inputs) {
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return !source1.evaluate(inputs); |
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} |
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int maxInput() {
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return source1.maxInput(); |
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} |
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}; |
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} |
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/** |
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* Creates an Element representing input to the logical net. |
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* |
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*/ |
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public static Element createInput(final int pin) {
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return new Element() {
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boolean evaluate(boolean[] inputs) {
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return inputs[pin]; |
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} |
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int maxInput() {
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return pin; |
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} |
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}; |
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} |
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} |