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Modern server-side Java template engine for both web and standalone environments
/*
* =============================================================================
*
* Copyright (c) 2011-2018, The THYMELEAF team (http://www.thymeleaf.org)
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* =============================================================================
*/
package org.thymeleaf.expression;
import java.util.ArrayList;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
import org.thymeleaf.util.EvaluationUtils;
import org.thymeleaf.util.Validate;
/**
*
* Expression Object for performing boolean operations inside Thymeleaf Standard Expressions.
*
*
* An object of this class is usually available in variable evaluation expressions with the name
* {@code #bools}.
*
*
* @author Daniel Fernández
*
* @since 1.0
*
*/
public final class Bools {
public Bools() {
super();
}
public Boolean isTrue(final Object target) {
return Boolean.valueOf(EvaluationUtils.evaluateAsBoolean(target));
}
public Boolean[] arrayIsTrue(final Object[] target) {
Validate.notNull(target, "Target cannot be null");
final Boolean[] result = new Boolean[target.length];
for (int i = 0; i < target.length; i++) {
result[i] = isTrue(target[i]);
}
return result;
}
public List listIsTrue(final List> target) {
Validate.notNull(target, "Target cannot be null");
final List result = new ArrayList(target.size() + 2);
for (final Object element : target) {
result.add(isTrue(element));
}
return result;
}
public Set setIsTrue(final Set> target) {
Validate.notNull(target, "Target cannot be null");
final Set result = new LinkedHashSet(target.size() + 2);
for (final Object element : target) {
result.add(isTrue(element));
}
return result;
}
public Boolean isFalse(final Object target) {
return Boolean.valueOf(!EvaluationUtils.evaluateAsBoolean(target));
}
public Boolean[] arrayIsFalse(final Object[] target) {
Validate.notNull(target, "Target cannot be null");
final Boolean[] result = new Boolean[target.length];
for (int i = 0; i < target.length; i++) {
result[i] = isFalse(target[i]);
}
return result;
}
public List listIsFalse(final List> target) {
Validate.notNull(target, "Target cannot be null");
final List result = new ArrayList(target.size() + 2);
for (final Object element : target) {
result.add(isFalse(element));
}
return result;
}
public Set setIsFalse(final Set> target) {
Validate.notNull(target, "Target cannot be null");
final Set result = new LinkedHashSet(target.size() + 2);
for (final Object element : target) {
result.add(isFalse(element));
}
return result;
}
public Boolean arrayAnd(final Object[] target) {
Validate.notNull(target, "Target cannot be null");
for (final Object aTarget : target) {
if (!isTrue(aTarget).booleanValue()) {
return Boolean.FALSE;
}
}
return Boolean.TRUE;
}
public Boolean listAnd(final List> target) {
Validate.notNull(target, "Target cannot be null");
for (final Object element : target) {
if (!isTrue(element).booleanValue()) {
return Boolean.FALSE;
}
}
return Boolean.TRUE;
}
public Boolean setAnd(final Set> target) {
Validate.notNull(target, "Target cannot be null");
for (final Object element : target) {
if (!isTrue(element).booleanValue()) {
return Boolean.FALSE;
}
}
return Boolean.TRUE;
}
public Boolean arrayOr(final Object[] target) {
Validate.notNull(target, "Target cannot be null");
for (final Object aTarget : target) {
if (isTrue(aTarget).booleanValue()) {
return Boolean.TRUE;
}
}
return Boolean.FALSE;
}
public Boolean listOr(final List> target) {
Validate.notNull(target, "Target cannot be null");
for (final Object element : target) {
if (isTrue(element).booleanValue()) {
return Boolean.TRUE;
}
}
return Boolean.FALSE;
}
public Boolean setOr(final Set> target) {
Validate.notNull(target, "Target cannot be null");
for (final Object element : target) {
if (isTrue(element).booleanValue()) {
return Boolean.TRUE;
}
}
return Boolean.FALSE;
}
}
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