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/*
* Copyright (C) 2007-2010 Júlio Vilmar Gesser.
* Copyright (C) 2011, 2013-2016 The JavaParser Team.
*
* This file is part of JavaParser.
*
* JavaParser can be used either under the terms of
* a) the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
* b) the terms of the Apache License
*
* You should have received a copy of both licenses in LICENCE.LGPL and
* LICENCE.APACHE. Please refer to those files for details.
*
* JavaParser is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*/
package com.github.javaparser.printer.concretesyntaxmodel;
import com.github.javaparser.ast.Node;
import com.github.javaparser.ast.NodeList;
import com.github.javaparser.ast.observer.ObservableProperty;
import com.github.javaparser.printer.SourcePrinter;
import java.util.Arrays;
import java.util.List;
public class CsmConditional implements CsmElement {
private final Condition condition;
private final List<ObservableProperty> properties;
private final CsmElement thenElement;
private final CsmElement elseElement;
public Condition getCondition() {
return condition;
}
public ObservableProperty getProperty() {
if (properties.size() > 1) {
throw new IllegalStateException();
}
return properties.get(0);
}
public CsmElement getThenElement() {
return thenElement;
}
public CsmElement getElseElement() {
return elseElement;
}
public enum Condition {
IS_EMPTY,
IS_NOT_EMPTY,
IS_PRESENT,
FLAG;
boolean evaluate(Node node, ObservableProperty property){
if (this == IS_PRESENT) {
return !property.isNullOrNotPresent(node);
}
if (this == FLAG) {
return property.getValueAsBooleanAttribute(node);
}
if (this == IS_EMPTY) {
NodeList value = property.getValueAsMultipleReference(node);
return value == null || value.isEmpty();
}
if (this == IS_NOT_EMPTY) {
NodeList value = property.getValueAsMultipleReference(node);
return value != null && !value.isEmpty();
}
throw new UnsupportedOperationException(name());
}
}
public CsmConditional(ObservableProperty property, Condition condition, CsmElement thenElement, CsmElement elseElement) {
this.properties = Arrays.asList(property);
this.condition = condition;
this.thenElement = thenElement;
this.elseElement = elseElement;
}
public CsmConditional(List<ObservableProperty> properties, Condition condition, CsmElement thenElement, CsmElement elseElement) {
if (properties.size() < 1) {
throw new IllegalArgumentException();
}
this.properties = properties;
this.condition = condition;
this.thenElement = thenElement;
this.elseElement = elseElement;
}
public CsmConditional(ObservableProperty property, Condition condition, CsmElement thenElement) {
this(property, condition, thenElement, new CsmNone());
}
@Override
public void prettyPrint(Node node, SourcePrinter printer) {
boolean test = false;
for (ObservableProperty prop : properties) {
test = test || condition.evaluate(node, prop);
}
if (test) {
thenElement.prettyPrint(node, printer);
} else {
elseElement.prettyPrint(node, printer);
}
}
}
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