/*
* Copyright 2013 the original author or authors.
*
* 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.gradle.platform.base.internal.toolchain;
import org.gradle.internal.text.TreeFormatter;
import org.gradle.util.TreeVisitor;
public class ToolChainAvailability implements ToolSearchResult {
private ToolSearchResult reason;
public boolean isAvailable() {
return reason == null;
}
public String getUnavailableMessage() {
TreeFormatter formatter = new TreeFormatter();
this.explain(formatter);
return formatter.toString();
}
public void explain(TreeVisitor<? super String> visitor) {
reason.explain(visitor);
}
public ToolChainAvailability unavailable(String unavailableMessage) {
if (reason == null) {
reason = new FixedMessageToolSearchResult(unavailableMessage);
}
return this;
}
public ToolChainAvailability mustBeAvailable(ToolSearchResult tool) {
if (!tool.isAvailable() && reason == null) {
reason = tool;
}
return this;
}
private static class FixedMessageToolSearchResult implements ToolSearchResult {
private final String message;
private FixedMessageToolSearchResult(String message) {
this.message = message;
}
public boolean isAvailable() {
return false;
}
public void explain(TreeVisitor<? super String> visitor) {
visitor.node(message);
}
}
}