/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.camel.model;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlElementRef;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlTransient;

import org.apache.camel.Predicate;
import org.apache.camel.spi.AsPredicate;
import org.apache.camel.spi.Metadata;

/**
 * Catches exceptions as part of a try, catch, finally block
 */
@Metadata(label = "error")
@XmlRootElement(name = "doCatch")
@XmlAccessorType(XmlAccessType.FIELD)
public class CatchDefinition extends OutputDefinition<CatchDefinition> {
    @XmlElement(name = "exception")
    private List<String> exceptions = new ArrayList<>();
    @XmlElement(name = "onWhen")
    @AsPredicate
    private WhenDefinition onWhen;
    @XmlTransient
    private List<Class<? extends Throwable>> exceptionClasses;

    public CatchDefinition() {
    }

    public CatchDefinition(List<Class<? extends Throwable>> exceptionClasses) {
        this.exceptionClasses = exceptionClasses;
    }

    public CatchDefinition(Class<? extends Throwable> exceptionType) {
        exceptionClasses = new ArrayList<>();
        exceptionClasses.add(exceptionType);
    }

    @Override
    public String toString() {
        return "DoCatch[ " + getExceptionClasses() + " -> " + getOutputs() + "]";
    }

    @Override
    public String getShortName() {
        return "doCatch";
    }

    @Override
    public String getLabel() {
        return "doCatch[ " + getExceptionClasses() + "]";
    }

    @Override
    public List<ProcessorDefinition<?>> getOutputs() {
        return outputs;
    }

    @XmlElementRef
    @Override
    public void setOutputs(List<ProcessorDefinition<?>> outputs) {
        super.setOutputs(outputs);
    }

    public List<Class<? extends Throwable>> getExceptionClasses() {
        return exceptionClasses;
    }

    public void setExceptionClasses(List<Class<? extends Throwable>> exceptionClasses) {
        this.exceptionClasses = exceptionClasses;
    }

    // Fluent API
    // -------------------------------------------------------------------------
    /**
     * The exceptions to catch.
     *
     * @param      exceptionClasses a list of the exception classes
     * @return                      the builder
     * @deprecated                  use {@link #exception(Class[])}
     */
    @Deprecated
    public CatchDefinition exceptionClasses(List<Class<? extends Throwable>> exceptionClasses) {
        setExceptionClasses(exceptionClasses);
        return this;
    }

    /**
     * The exception(s) to catch.
     *
     * @param  exceptions one or more exceptions
     * @return            the builder
     */
    public CatchDefinition exception(Class<? extends Throwable>... exceptions) {
        if (exceptionClasses == null) {
            exceptionClasses = new ArrayList<>();
        }
        if (exceptions != null) {
            exceptionClasses.addAll(Arrays.asList(exceptions));
        }
        return this;
    }

    /**
     * Sets an additional predicate that should be true before the onCatch is triggered.
     * <p/>
     * To be used for fine grained controlling whether a thrown exception should be intercepted by this exception type
     * or not.
     *
     * @param  predicate predicate that determines true or false
     * @return           the builder
     */
    public CatchDefinition onWhen(@AsPredicate Predicate predicate) {
        setOnWhen(new WhenDefinition(predicate));
        return this;
    }

    /**
     * Sets the exception class that the CatchType want to catch
     *
     * @param      exception the exception of class
     * @return               the builder
     * @deprecated           use {@link #exception(Class[])}
     */
    @Deprecated
    public CatchDefinition exceptionClasses(Class<? extends Throwable> exception) {
        List<Class<? extends Throwable>> list = getExceptionClasses();
        list.add(exception);
        return this;
    }

    public List<String> getExceptions() {
        return exceptions;
    }

    public void setExceptions(List<String> exceptions) {
        this.exceptions = exceptions;
    }

    public WhenDefinition getOnWhen() {
        return onWhen;
    }

    public void setOnWhen(WhenDefinition onWhen) {
        this.onWhen = onWhen;
    }

}
